17416( 26) - 16-Aug-2024 17:28:59 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17416 Version: 26 Check-in Time: 16-Aug-2024 17:28:59 STScI Edit Number: 21 Title Wind Structure of 31 Cygni from UV Eclipse Mapping ------------------------------------------------------------------------------------ Type Cycle GO 31 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Philip D. Bennett Dalhousie University Y CoI: Dr. Alexander Brown University of Colorado at Boulder N CoI: Dr. Stephenson Yang University of Victoria N ------------------------------------------------------------------------------------ Abstract Observing the stellar wind of a mass-losing red supergiant in an eclipsing binary system in absorption against the ultraviolet continuum of a hot companion provides an elegant way of mapping the structure of the supergiant's wind with high spatial resolution. Repeated observations near eclipse allow the wind to be mapped as the line of sight to the hot companion sweeps through the wind. The bright eclipsing binary 31 Cygni (K4 Ib + B3 V) is ideal for this work. It is bright enough for high-resolution UV spectroscopy with well-separated components and an orbital period of 10.34 years. In the ultraviolet, the hot early-type companion dominates the flux, thereby avoiding the complexities of analyzing a composite spectrum. We propose to map the wind structure of the 31 Cyg red supergiant by observing the FUV spectrum near and during the March 2024 eclipse at 10 visits with HST/STIS. These UV observations can only be done with HST. ------------------------------------------------------------------------------------ Observations Description ------------------------ We propose to observe the FUV spectrum of the red supergiant eclipsing binary 31 Cygni (K5 Ib + B3 V) from 1150 - 3050 A using theE140M echelle grating, 2 prime tilts of the E230M echelle grating (at central wavelengths of 1978 and 2707 A), and 1 tilt of the E230H echelle grating (at a central wavelength of 2912 A) at 10 epochs (HST visits) during the ingress, totality, and egress phases of the Feb-Apr 2024 eclipse of 31 Cygni. In this event, the red supergiant primary will eclipse the hot B-type companion. The duration of total eclipse is 57 days (2024 Feb 21 through Apr 18), with mid-eclipse on 2024 Mar 22. The proposed UV echelle observations at each observation epoch (HST visit) will fit into a single HST orbit, so the entire program can be carried out in just 10 orbits. Three visits (1, 8, 9) will provide observations of the RSG wind away from eclipse. Two visits (2, 7) will sample atmospheric eclipse when the line of sight to the hot companion passes deep into the extended outer atmosphere of the red supergiant. Two visits (3, 6) will sample deep atmospheric eclipse at times just prior to the onset (ingress) of total eclipse, and just after emergence (egress) from totality. Two visits (4, 5) will observe the FUV spectrum during total eclipse, when the B-type continuum is occulted and an emission line spectrum seen due to the scattering of hot star photons by the wind of the RSG star. One final visit (10) will observe the intrinsic FUV spectrum of the hot companion even further from eclipse, when circumstellar absorption from the red supergiant's wind should be minimal. This 17416( 26) - 16-Aug-2024 17:28:59 - [ 2] final visit is to provide a baseline stellar spectrum of the hot companion for analyses of the additional circumstellar absorption seen at phases closer to eclipse, as well as yielding an additional radial velocity point to refine the secondary orbit. The dates of the proposed 10 visits are shown in Table 1 below. Table 1. Summary of Proposed Visits Near & During the Eclipse of 31 Cygni Visit Start Date Window End Date Window Eclipse Stage 1 2023 Dec 21 2024 Jan 16 Wind absorption - ingress 2 2024 Feb 13 2024 Feb 15 Atmospheric eclipse - ingress 3 2024 Feb 16 2024 Feb 19 Partial eclipse - ingress 4 2024 Mar 10 2024 Mar 21 Total eclipse - 1st visit - wind scattered emission line spectrum 5 2024 Mar 23 2024 Apr 04 Total eclipse - 2nd visit - wind scattered emission line spectrum 6 2024 Apr 20 2024 Apr 23 Partial eclipse - egress 7 2024 Apr 24 2024 Apr 26 Atmospheric eclipse - egress 8 2024 May 10 2024 May 22 Wind absorption - egress 9 2024 Jun 10 2024 Jun 19 Far wind absorption - egress 10 2024 Sep 09 2024 Sep 26 Out of eclipse - intrinsic B star spectrum These observation dates have been constrained by use of BETWEEN dates for each visit, and AFTER constraints to ensure that each visit is executed after the preceding visit. For Visits 4, 5 & 8, about 150 s of "unused" orbit visibility (according to the Orbit Planner) has been left at the end of the science program to allow schedulability at the requested dates of those visits. The orbit duration shown in the Orbit planner is apparently an average value of the actual orbit visibility. If unused time is left at the end of the orbit, then the available range of schedulable dates shown in the Visit Planner expands. Therefore, we have added a block of unused time at the ends of those 3 visits, as needed to permit those visits to be scheduled during the windows set by the BETWEEN constraints for those visits. Removing any of this "unused" orbit time impacts the schedulability of these 3 visits, according to the APT Visit Planner. The following two ephemerii were used to predict times of the March 2024 eclipse: 1. Gyldenkerne & Johansen 1970 A&AS, 1, 129 based on the 1962 eclipse [GJ70], and 2. Stencel et al. 1984 ApJ, 281, 751, based on the 1982 eclipse [S84]. The GJ70 ephemeris predicts a 2024 mid-eclipse on JD 2460391.69, while S84 yields a 2024 mid-eclipse time of JD 2460391.75. These values only differ by 0.06 days or 86 minutes, and so the average mid-eclipse time of JD 2460391.72 = 2024 Mar 22 at 05:17 UT has been used for this work. The predicted length of totality is 57.66 days. Totality begins on JD 2460361.70 (2024 Feb 21) and ends on JD 2460419.36 (2024 Apr 18), with partial eclipse phases lasting about 4-5 days before and after these dates, respectively. The two mid-eclipse visits (Visit 4 & 5) are planned to bracket the 12 day periods prior to and immediately following mid-eclipse respectively. Both Visit 4 & 5 will occur within the central half of the total eclipse period, to avoid possible exposure of the MAMA detectors to the hot star's UV-bright continuum. 17416( 26) - 16-Aug-2024 17:28:59 - [ 3] Observations for each visit will begin with acquiring the target in the visible in the F25D5 aperture, and then performing a peakup using the neutral density 0.3X0.05ND aperture (to avoid saturating the CCD due to the brightness of the target in the visible). These acquisitions and peakups will be carried out in the visible spectral region (where the flux is dominated by the red supergiant primary) for each visit because the hot companion will be faint & variable in the UV during eclipse, and peakups in the UV might be problematic at those times. Four science exposures will be carried for each visit using E140M (at the fixed central wavelength, or cenwave, of 1425 A), E230M at the 2 cenwaves of 1978 and 2707 A, and E230H at the cenwave of 2912 A (see Table 2 below for details). The B-type secondary star in 31 Cygni is UV-bright (out of eclipse), with FUV fluxes near 2.0e-10 ergs/cm^2/s/A from 1240-1300A, decreasing to 5.0e-11 erg/cm^2/s/A at 2350 A and to 3.0e-11 ergs/cm^2/s/A at 3000 A. The maximum global count rate of ~150, 000 counts/s occurs for the E230H/2912 exposure with the 0.2X0.09 aperture. The other medium-resolution STIS echelle exposures use the 31X0.05NDB neutral density aperture to reduce the bright continuum flux, except for Visit 4 & 5 during total eclipse (when the B star's UV-bright continuum is absent), which use the bare 0.2X0.06 aperture. The hot star in 31 Cygni is a B-type main-sequence star, and its continuum flux is not expected to vary, and has never been observed to vary (except for occultation of the flux during eclipse). None of these STIS/MAMA echelle observations exceed the bright limits for a non-variable source (except during elcipse, when that source is occulted). The investigators have observed 31 Cyg with a similar observational setup before without problems or violation of the UV/MAMA bright limits. Each of the 10 planned visits will be 1 orbit in length, and will contain a similar sequence of planned STIS UV spectroscopic exposures. The exposure lengths and setup for all but 3 of the 10 visits are identical. The only differences are for the total eclipse visits (visits 4 & 5), which will observe the spectrum with the E140M & E230M gratings with longer exposures using the bare 0.2X0.06 aperture (instead of the neutral density 31X0.05NDB slit) because the hot star's UV-bright continuum will be absent during eclipse, and only a (much) weaker emission line spectrum will be present. Visit 8 will observe circumstellar absorption from the red supergiant's wind, along a sightline about 1 month after egress, using slightly shorter exposure times than the other visits (Table 2 below) in order to allow scheduling this observation during the preferred mid-May period. Otherwise, the only difference between the out-of-eclipse visits is the planned observation date, which will be constrained by BETWEEN timing requirements to lie between specified dates chosen to sample key events near and during the eclipse. Table 2. Summary of STIS Spectroscopic Grating Configurations, Exposure Times, ETC IDs and S/N Estimates Detector/Grating Observation Type Aperture Cenwave ETC ID Exp Time (s) S/N CCD/ACQ All F25ND5 1892621 2 135 CCD/ACQ/PEAK All 0.3X0.05ND 1892619 0.1 140 GO-WAVECAL/E140M Calibration Lamp 0.2X0.06 1425 20 STIS/E140M Out-of-eclipse 31X0.05NDB 1425 1891728 240 20-40 STIS/E140M Total eclipse 0.2X0.06 1425 1893440 180 20-30 (em lines) GO-WAVECAL/E230M Calibration Lamp 0.2X0.06 1978 20 STIS/E230M Out-of-eclipse 31X0.05NDB 1978 1891736 195 25-40 17416( 26) - 16-Aug-2024 17:28:59 - [ 4] STIS/E230M Total eclipse 0.2X0.06 1978 1893441 155 30-50 (em lines) STIS/E230M Out-of-eclipse 31X0.05NDB 2707 1891738 101 25-30 STIS/E230M Total eclipse 0.2X0.06 2707 1893442 80 30-50 (em lines) GO-WAVECAL/E230M Calibration Lamp 0.2X0.06 2707 20 STIS/E230H Out-of-eclipse 0.2X0.09 2912 1891754 68 20-30 STIS/E230H Total eclipse 0.2X0.09 2912 1893443 240 30-40 (Mg II h&k lines) GO-WAVECAL/E230H Calibration Lamp 0.2X0.09 2912 20 The ETC calculations shown here used a user-supplied input file based on a composite of FUSE, HST & IUE/LSA UV and visible fluxes of 31 Cyg. Acquisition and peakup using the CCD visible flux used a Pickles K4I (3990K) model normalized to a flux F_lambda = 1.184e-10 egs/cm2/s/A at 5500 A, consistent with the above user-supplied input file in this region. (That user input spectrum only extends longward to 5685 A, so Pickles model fluxes are used to model the extension of the observed spectrum into the red and IR regions, as observed by the CCD detector during acquisition and peakup). Total eclipse ETC calculations used a combination of UV total eclipse observations from FUSE Program D123 Visits 3 & 4 (June-July 2003), and IUE SWP18108 & LWR 14262 LSA images (Sept 1982). To optimize packing of the science observations into each a single orbit's visibility period, we have turned off default wavecals (WAVECAL=NO) , and specified user GO wavecals with each science exposure. This allows the final GO wavelcal to be done during Earth occultation, which optimizes the available time for science exposures. The GO exposure times are the default 20 seconds for all 4 calibration lamp exposures. ------------------------------------------------------------------------------------ 17416( 26) - 16-Aug-2024 17:28:59 - [ 5] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 -31-CYG STAR, B3-B5 V-IV, RA=20H13M37.9082S, J2000 V = V = 3.8 +/- 0.1 F_lam(1270 A)= 1.9e-10 CIRCUMSTELLAR MATTER, DEC=+46D44'28.76" -7.24 ergs/cm^2/s/A. FUV flux is from INTERACTING BINARY, main-sequence B star and is NOT WIND variable (except during eclipse) Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database.This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 1.6965971639603723E-4 0.0033900000000000002 0.0029617 ------------------------------------------------------------------------------------------------------------------------------------ 17416( 26) - 16-Aug-2024 17:28:59 - [ 6] Visit: 01 (Wind absorption - ingress) Visit Requirements: BETWEEN 21-DEC-2023:00:00:00 AND 16-JAN-2024:00:00:00 On Hold Comments: Additional Comments: Visit 1 will observe the UV continuum of the hot companion of 31 Cyg, with circumstellar absorption from the stellar wind of the red supergiant primary superimposed, about 2.5 months prior to ingress into eclipse. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 -31-CYG STIS/CCD ACQ F25ND5 MIRROR 1 2.0 S (2 S) Comments: Exposure saturates in 38.54 sec. ------------------------------------------------------------------------------------------------------------------------------------ 2 -31-CYG STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.1 S (0.1 K D S) Comments: Exposure saturates in 1.15 sec. ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE STIS/FUV ACCUM 0.2X0.06 E140M 1425 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 4 -31-CYG STIS/FUV ACCUM 31X0.05ND E140M 1425 WAVECAL=NO 1 240 S (240 -MAMA B S) Comments: Total count rate 89138 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 5 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 1978 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 6 -31-CYG STIS/NUV ACCUM 31X0.05ND E230M 1978 1 195 S (195 -MAMA B S) Comments: Total count rate 66, 830 count/sec. ------------------------------------------------------------------------------------------------------------------------------------ 7 -31-CYG STIS/NUV ACCUM 31X0.05ND E230M 2707 1 101 S (101 -MAMA B S) Comments: Total count rate 98791 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 8 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 2707 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 9 -31-CYG STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 68 S (68 -MAMA S) Comments: Total count rate 149654 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 10 WAVE STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 17416( 26) - 16-Aug-2024 17:28:59 - [ 7] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ -31-CYG 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A -31-CYG 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND WAVE 3 STIS/FUV ACCUM 0.2X0.06 E140M 1425 none none none none 1 N/A -MAMA -31-CYG 4 STIS/FUV ACCUM 31X0.05N E140M 1425 none none none none 1 N/A -MAMA DB WAVE 5 STIS/NUV ACCUM 0.2X0.06 E230M 1978 none none none none 1 N/A -MAMA -31-CYG 6 STIS/NUV ACCUM 31X0.05N E230M 1978 none none none none 1 N/A -MAMA DB -31-CYG 7 STIS/NUV ACCUM 31X0.05N E230M 2707 none none none none 1 N/A -MAMA DB WAVE 8 STIS/NUV ACCUM 0.2X0.06 E230M 2707 none none none none 1 N/A -MAMA -31-CYG 9 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA WAVE 10 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA 17416( 26) - 16-Aug-2024 17:28:59 - [ 8] Visit: 02 (Atmospheric eclipse - ingress) Visit Requirements: AFTER 01; BETWEEN 13-FEB-2024:00:00:00 AND 15-FEB-2024:00:00:00 On Hold Comments: Additional Comments: Visit 2 will observe the UV continuum of the hot companion of 31 Cyg, seen through the extended outer atmosphere of the supergiant approaching ingress into eclipse. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 -31-CYG STIS/CCD ACQ F25ND5 MIRROR 1 2.0 S (2 S) Comments: Exposure saturates in 38.54 sec. ------------------------------------------------------------------------------------------------------------------------------------ 2 -31-CYG STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.1 S (0.1 K D S) Comments: Exposure saturates in 1.15 sec. ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE STIS/FUV ACCUM 0.2X0.06 E140M 1425 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 4 -31-CYG STIS/FUV ACCUM 31X0.05ND E140M 1425 WAVECAL=NO 1 240 S (240 -MAMA B S) Comments: Total count rate 89138 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 5 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 1978 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 6 -31-CYG STIS/NUV ACCUM 31X0.05ND E230M 1978 1 195 S (195 -MAMA B S) Comments: Total count rate 66, 830 count/sec. ------------------------------------------------------------------------------------------------------------------------------------ 7 -31-CYG STIS/NUV ACCUM 31X0.05ND E230M 2707 1 101 S (101 -MAMA B S) Comments: Total count rate 98791 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 8 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 2707 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 9 -31-CYG STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 68 S (68 -MAMA S) Comments: Total count rate 149654 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 10 WAVE STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 17416( 26) - 16-Aug-2024 17:28:59 - [ 9] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ -31-CYG 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A -31-CYG 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND WAVE 3 STIS/FUV ACCUM 0.2X0.06 E140M 1425 none none none none 1 N/A -MAMA -31-CYG 4 STIS/FUV ACCUM 31X0.05N E140M 1425 none none none none 1 N/A -MAMA DB WAVE 5 STIS/NUV ACCUM 0.2X0.06 E230M 1978 none none none none 1 N/A -MAMA -31-CYG 6 STIS/NUV ACCUM 31X0.05N E230M 1978 none none none none 1 N/A -MAMA DB -31-CYG 7 STIS/NUV ACCUM 31X0.05N E230M 2707 none none none none 1 N/A -MAMA DB WAVE 8 STIS/NUV ACCUM 0.2X0.06 E230M 2707 none none none none 1 N/A -MAMA -31-CYG 9 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA WAVE 10 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA 17416( 26) - 16-Aug-2024 17:28:59 - [ 10] Visit: 03 (Partial eclipse - ingress) Visit Requirements: AFTER 02; BETWEEN 16-FEB-2024:00:00:00 AND 19-FEB-2024:00:00:00 On Hold Comments: Additional Comments: Visit 3 will observe the UV continuum of the hot companion of 31 Cyg during the partial eclipse ingress phase. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 -31-CYG STIS/CCD ACQ F25ND5 MIRROR 1 2.0 S (2 S) Comments: Exposure saturates in 38.54 sec. ------------------------------------------------------------------------------------------------------------------------------------ 2 -31-CYG STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.1 S (0.1 K D S) Comments: Exposure saturates in 1.15 sec. ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE STIS/FUV ACCUM 0.2X0.06 E140M 1425 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 4 -31-CYG STIS/FUV ACCUM 31X0.05ND E140M 1425 WAVECAL=NO 1 240 S (240 -MAMA B S) Comments: Total count rate 89138 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 5 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 1978 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 6 -31-CYG STIS/NUV ACCUM 31X0.05ND E230M 1978 1 195 S (195 -MAMA B S) Comments: Total count rate 66, 830 count/sec. ------------------------------------------------------------------------------------------------------------------------------------ 7 -31-CYG STIS/NUV ACCUM 31X0.05ND E230M 2707 1 101 S (101 -MAMA B S) Comments: Total count rate 98791 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 8 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 2707 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 9 -31-CYG STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 68 S (68 -MAMA S) Comments: Total count rate 149654 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 10 WAVE STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 17416( 26) - 16-Aug-2024 17:28:59 - [ 11] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ -31-CYG 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A -31-CYG 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND WAVE 3 STIS/FUV ACCUM 0.2X0.06 E140M 1425 none none none none 1 N/A -MAMA -31-CYG 4 STIS/FUV ACCUM 31X0.05N E140M 1425 none none none none 1 N/A -MAMA DB WAVE 5 STIS/NUV ACCUM 0.2X0.06 E230M 1978 none none none none 1 N/A -MAMA -31-CYG 6 STIS/NUV ACCUM 31X0.05N E230M 1978 none none none none 1 N/A -MAMA DB -31-CYG 7 STIS/NUV ACCUM 31X0.05N E230M 2707 none none none none 1 N/A -MAMA DB WAVE 8 STIS/NUV ACCUM 0.2X0.06 E230M 2707 none none none none 1 N/A -MAMA -31-CYG 9 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA WAVE 10 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA 17416( 26) - 16-Aug-2024 17:28:59 - [ 12] Visit: 04 (Total eclipse - 1st visit - wind scattered emission line spectrum) Visit Requirements: AFTER 03; BETWEEN 10-MAR-2024:00:00:00 AND 21-MAR-2024:00:00:00 On Hold Comments: Additional Comments: Visit 4 will observe the UV emission line spectrum seen in total eclipse. This spectrum is formed by B-star continuum photons scattered by the wind of the red supergiant. This is the 1st visit in total eclipse, with a window from mid-eclipse - 12 days to mid-eclipse (Mar 22). Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 -31-CYG STIS/CCD ACQ F25ND5 MIRROR 1 2.0 S (2 S) Comments: Exposure saturates in 38.54 sec. ------------------------------------------------------------------------------------------------------------------------------------ 2 -31-CYG STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.1 S (0.1 K D S) Comments: Exposure saturates in 1.15 sec. ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE STIS/FUV ACCUM 0.2X0.06 E140M 1425 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 4 -31-CYG STIS/FUV ACCUM 0.2X0.06 E140M 1425 WAVECAL=NO 1 180 S (180 -MAMA S) Comments: Use bare 0.2X0.06 aperture when B star is in total eclipse, and UV continuum absent. ------------------------------------------------------------------------------------------------------------------------------------ 5 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 1978 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 6 -31-CYG STIS/NUV ACCUM 0.2X0.06 E230M 1978 1 155 S (155 -MAMA S) Comments: Use bare 0.2X0.06 aperture when B star is in total eclipse, and UV continuum absent. ------------------------------------------------------------------------------------------------------------------------------------ 7 -31-CYG STIS/NUV ACCUM 0.2X0.06 E230M 2707 1 80 S (80 -MAMA S) Comments: Use bare 0.2X0.06 aperture when B star is in total eclipse, and UV continuum absent. ------------------------------------------------------------------------------------------------------------------------------------ 8 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 2707 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 9 -31-CYG STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 240 S (240 -MAMA S) ------------------------------------------------------------------------------------------------------------------------------------ 10 WAVE STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 17416( 26) - 16-Aug-2024 17:28:59 - [ 13] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ -31-CYG 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A -31-CYG 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND WAVE 3 STIS/FUV ACCUM 0.2X0.06 E140M 1425 none none none none 1 N/A -MAMA -31-CYG 4 STIS/FUV ACCUM 0.2X0.06 E140M 1425 none none none none 1 N/A -MAMA WAVE 5 STIS/NUV ACCUM 0.2X0.06 E230M 1978 none none none none 1 N/A -MAMA -31-CYG 6 STIS/NUV ACCUM 0.2X0.06 E230M 1978 none none none none 1 N/A -MAMA -31-CYG 7 STIS/NUV ACCUM 0.2X0.06 E230M 2707 none none none none 1 N/A -MAMA WAVE 8 STIS/NUV ACCUM 0.2X0.06 E230M 2707 none none none none 1 N/A -MAMA -31-CYG 9 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA WAVE 10 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA 17416( 26) - 16-Aug-2024 17:28:59 - [ 14] Visit: 05 (Total eclipse - 2nd visit - wind scattered emission line spectrum) Visit Requirements: AFTER 04; BETWEEN 23-MAR-2024:00:00:00 AND 04-APR-2024:00:00:00 On Hold Comments: Additional Comments: Visit 5 will observe the UV emission line spectrum seen in total eclipse. This spectrum is formed by B-star continuum photons scattered by the wind of the red supergiant. This is the 2nd visit in total eclipse, with a window from mid-eclipse (Mar 22) to mid-eclipse + 12 days. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 -31-CYG STIS/CCD ACQ F25ND5 MIRROR 1 2.0 S (2 S) Comments: Exposure saturates in 38.54 sec. ------------------------------------------------------------------------------------------------------------------------------------ 2 -31-CYG STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.1 S (0.1 K D S) Comments: Exposure saturates in 1.15 sec. ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE STIS/FUV ACCUM 0.2X0.06 E140M 1425 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 4 -31-CYG STIS/FUV ACCUM 0.2X0.06 E140M 1425 WAVECAL=NO 1 180 S (180 -MAMA S) Comments: Use bare 0.2X0.06 aperture when B star is in total eclipse, and UV continuum absent. ------------------------------------------------------------------------------------------------------------------------------------ 5 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 1978 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 6 -31-CYG STIS/NUV ACCUM 0.2X0.06 E230M 1978 1 155 S (155 -MAMA S) Comments: Use bare 0.2X0.06 aperture when B star is in total eclipse, and UV continuum absent. ------------------------------------------------------------------------------------------------------------------------------------ 7 -31-CYG STIS/NUV ACCUM 0.2X0.06 E230M 2707 1 80 S (80 -MAMA S) Comments: Use bare 0.2X0.06 aperture when B star is in total eclipse, and UV continuum absent. ------------------------------------------------------------------------------------------------------------------------------------ 8 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 2707 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 9 -31-CYG STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 240 S (240 -MAMA S) ------------------------------------------------------------------------------------------------------------------------------------ 10 WAVE STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 17416( 26) - 16-Aug-2024 17:28:59 - [ 15] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ -31-CYG 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A -31-CYG 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND WAVE 3 STIS/FUV ACCUM 0.2X0.06 E140M 1425 none none none none 1 N/A -MAMA -31-CYG 4 STIS/FUV ACCUM 0.2X0.06 E140M 1425 none none none none 1 N/A -MAMA WAVE 5 STIS/NUV ACCUM 0.2X0.06 E230M 1978 none none none none 1 N/A -MAMA -31-CYG 6 STIS/NUV ACCUM 0.2X0.06 E230M 1978 none none none none 1 N/A -MAMA -31-CYG 7 STIS/NUV ACCUM 0.2X0.06 E230M 2707 none none none none 1 N/A -MAMA WAVE 8 STIS/NUV ACCUM 0.2X0.06 E230M 2707 none none none none 1 N/A -MAMA -31-CYG 9 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA WAVE 10 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA 17416( 26) - 16-Aug-2024 17:28:59 - [ 16] Visit: 06 (Partial eclipse - egress) Visit Requirements: AFTER 05; BETWEEN 20-APR-2024:00:00:00 AND 23-APR-2024:00:00:00 On Hold Comments: Additional Comments: Visit 6 will observe the UV continuum of the hot companion of 31 Cyg during the partial eclipse egress phase. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 -31-CYG STIS/CCD ACQ F25ND5 MIRROR 1 2.0 S (2 S) Comments: Exposure saturates in 38.54 sec. ------------------------------------------------------------------------------------------------------------------------------------ 2 -31-CYG STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.1 S (0.1 K D S) Comments: Exposure saturates in 1.15 sec. ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE STIS/FUV ACCUM 0.2X0.06 E140M 1425 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 4 -31-CYG STIS/FUV ACCUM 31X0.05ND E140M 1425 WAVECAL=NO 1 240 S (240 -MAMA B S) Comments: Total count rate 89138 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 5 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 1978 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 6 -31-CYG STIS/NUV ACCUM 31X0.05ND E230M 1978 1 195 S (195 -MAMA B S) Comments: Total count rate 66, 830 count/sec. ------------------------------------------------------------------------------------------------------------------------------------ 7 -31-CYG STIS/NUV ACCUM 31X0.05ND E230M 2707 1 101 S (101 -MAMA B S) Comments: Total count rate 98791 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 8 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 2707 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 9 -31-CYG STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 68 S (68 -MAMA S) Comments: Total count rate 149654 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 10 WAVE STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 17416( 26) - 16-Aug-2024 17:28:59 - [ 17] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ -31-CYG 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A -31-CYG 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND WAVE 3 STIS/FUV ACCUM 0.2X0.06 E140M 1425 none none none none 1 N/A -MAMA -31-CYG 4 STIS/FUV ACCUM 31X0.05N E140M 1425 none none none none 1 N/A -MAMA DB WAVE 5 STIS/NUV ACCUM 0.2X0.06 E230M 1978 none none none none 1 N/A -MAMA -31-CYG 6 STIS/NUV ACCUM 31X0.05N E230M 1978 none none none none 1 N/A -MAMA DB -31-CYG 7 STIS/NUV ACCUM 31X0.05N E230M 2707 none none none none 1 N/A -MAMA DB WAVE 8 STIS/NUV ACCUM 0.2X0.06 E230M 2707 none none none none 1 N/A -MAMA -31-CYG 9 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA WAVE 10 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA 17416( 26) - 16-Aug-2024 17:28:59 - [ 18] Visit: 07 (Atmospheric eclipse - egress) Visit Requirements: On Hold Comments: Additional Comments: Visit 7 will observe the UV continuum of the hot companion of 31 Cyg, seen through the extended outer atmosphere of the supergiant following egress from eclipse. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 -31-CYG STIS/CCD ACQ F25ND5 MIRROR 1 2.0 S (2 SEQ 1-10 NON-INT S) Comments: Exposure saturates in 38.54 sec. ------------------------------------------------------------------------------------------------------------------------------------ 2 -31-CYG STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.1 S (0.1 K D S) Comments: Exposure saturates in 1.15 sec. ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE STIS/FUV ACCUM 0.2X0.06 E140M 1425 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 4 -31-CYG STIS/FUV ACCUM 31X0.05ND E140M 1425 WAVECAL=NO 1 178 S (178 -MAMA B S) Comments: Total count rate 89138 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 5 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 1978 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 6 -31-CYG STIS/NUV ACCUM 31X0.05ND E230M 1978 1 135 S (135 -MAMA B S) Comments: Total count rate 66, 830 count/sec. ------------------------------------------------------------------------------------------------------------------------------------ 7 -31-CYG STIS/NUV ACCUM 31X0.05ND E230M 2707 1 85 S (85 -MAMA B S) Comments: Total count rate 98791 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 8 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 2707 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 9 -31-CYG STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 68 S (68 -MAMA S) Comments: Total count rate 149654 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 10 WAVE STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 17416( 26) - 16-Aug-2024 17:28:59 - [ 19] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ -31-CYG 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A -31-CYG 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND WAVE 3 STIS/FUV ACCUM 0.2X0.06 E140M 1425 none none none none 1 N/A -MAMA -31-CYG 4 STIS/FUV ACCUM 31X0.05N E140M 1425 none none none none 1 N/A -MAMA DB WAVE 5 STIS/NUV ACCUM 0.2X0.06 E230M 1978 none none none none 1 N/A -MAMA -31-CYG 6 STIS/NUV ACCUM 31X0.05N E230M 1978 none none none none 1 N/A -MAMA DB -31-CYG 7 STIS/NUV ACCUM 31X0.05N E230M 2707 none none none none 1 N/A -MAMA DB WAVE 8 STIS/NUV ACCUM 0.2X0.06 E230M 2707 none none none none 1 N/A -MAMA -31-CYG 9 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA WAVE 10 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA 17416( 26) - 16-Aug-2024 17:28:59 - [ 20] Visit: 08 (Wind absorption - egress) Visit Requirements: BETWEEN 01-NOV-2024:00:00:00 AND 12-DEC-2024:00:00:00 On Hold Comments: Additional Comments: Visit 8 will observe the UV continuum of the hot companion of 31 Cyg, with circumstellar absorption from the supergiant's stellar wind following egress from eclipse. This is a special setup with reduced exposure times for Visit 8 to allow schedulability in May 2024. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 -31-CYG STIS/CCD ACQ F25ND5 MIRROR 1 2.0 S (2 S) Comments: Exposure saturates in 38.54 sec. ------------------------------------------------------------------------------------------------------------------------------------ 2 -31-CYG STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.1 S (0.1 K D S) Comments: Exposure saturates in 1.15 sec. ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE STIS/FUV ACCUM 0.2X0.06 E140M 1425 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 4 -31-CYG STIS/FUV ACCUM 31X0.05ND E140M 1425 WAVECAL=NO 1 165 S (165 -MAMA B S) Comments: Total count rate 89138 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 5 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 1978 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 6 -31-CYG STIS/NUV ACCUM 31X0.05ND E230M 1978 1 140 S (140 -MAMA B S) Comments: Total count rate 66, 830 count/sec. ------------------------------------------------------------------------------------------------------------------------------------ 7 -31-CYG STIS/NUV ACCUM 31X0.05ND E230M 2707 1 80 S (80 -MAMA B S) Comments: Total count rate 98791 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 8 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 2707 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 9 -31-CYG STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 65 S (65 -MAMA S) Comments: Total count rate 149654 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 10 WAVE STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 17416( 26) - 16-Aug-2024 17:28:59 - [ 21] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ -31-CYG 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A -31-CYG 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND WAVE 3 STIS/FUV ACCUM 0.2X0.06 E140M 1425 none none none none 1 N/A -MAMA -31-CYG 4 STIS/FUV ACCUM 31X0.05N E140M 1425 none none none none 1 N/A -MAMA DB WAVE 5 STIS/NUV ACCUM 0.2X0.06 E230M 1978 none none none none 1 N/A -MAMA -31-CYG 6 STIS/NUV ACCUM 31X0.05N E230M 1978 none none none none 1 N/A -MAMA DB -31-CYG 7 STIS/NUV ACCUM 31X0.05N E230M 2707 none none none none 1 N/A -MAMA DB WAVE 8 STIS/NUV ACCUM 0.2X0.06 E230M 2707 none none none none 1 N/A -MAMA -31-CYG 9 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA WAVE 10 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA 17416( 26) - 16-Aug-2024 17:28:59 - [ 22] Visit: 09 (Far wind absorption - egress) Visit Requirements: BETWEEN 01-MAR-2025:00:00:00 AND 03-APR-2025:00:00:00 On Hold Comments: Additional Comments: Visit 9 will observe the UV continuum of the hot companion of 31 Cyg, with circumstellar absorption from the supergiant's stellar wind about 3 months post-eclipse. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 -31-CYG STIS/CCD ACQ F25ND5 MIRROR 1 2.0 S (2 S) Comments: Exposure saturates in 38.54 sec. ------------------------------------------------------------------------------------------------------------------------------------ 2 -31-CYG STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.1 S (0.1 K D S) Comments: Exposure saturates in 1.15 sec. ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE STIS/FUV ACCUM 0.2X0.06 E140M 1425 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 4 -31-CYG STIS/FUV ACCUM 31X0.05ND E140M 1425 WAVECAL=NO 1 240 S -MAMA B see below (205 S) Comments: Total count rate 89138 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 5 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 1978 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 6 -31-CYG STIS/NUV ACCUM 31X0.05ND E230M 1978 1 195 S -MAMA B see below (160 S) Comments: Total count rate 66, 830 count/sec. ------------------------------------------------------------------------------------------------------------------------------------ 7 -31-CYG STIS/NUV ACCUM 31X0.05ND E230M 2707 1 101 S -MAMA B see below (66 S) Comments: Total count rate 98791 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 8 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 2707 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 9 -31-CYG STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 68 S -MAMA see below (33 S) Comments: Total count rate 149654 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 10 WAVE STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 17416( 26) - 16-Aug-2024 17:28:59 - [ 23] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ -31-CYG 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A -31-CYG 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND WAVE 3 STIS/FUV ACCUM 0.2X0.06 E140M 1425 none none none none 1 N/A -MAMA -31-CYG 4 STIS/FUV ACCUM 31X0.05N E140M 1425 none none none none 1 205.0 S -MAMA DB WAVE 5 STIS/NUV ACCUM 0.2X0.06 E230M 1978 none none none none 1 N/A -MAMA -31-CYG 6 STIS/NUV ACCUM 31X0.05N E230M 1978 none none none none 1 160.0 S -MAMA DB -31-CYG 7 STIS/NUV ACCUM 31X0.05N E230M 2707 none none none none 1 66.0 S -MAMA DB WAVE 8 STIS/NUV ACCUM 0.2X0.06 E230M 2707 none none none none 1 N/A -MAMA -31-CYG 9 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 33.0 S -MAMA WAVE 10 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA 17416( 26) - 16-Aug-2024 17:28:59 - [ 24] Visit: 10 (Out of eclipse - intrinsic B star spectrum) Visit Requirements: AFTER 01-NOV-2025:00:00:00; AFTER 09 On Hold Comments: Additional Comments: Visit 10 will observe the intrinsic spectrum of the B-star companion, out-of-eclipse and (relatively) uncontaminated by circumstellar absorption from the supergiant's wind about 6 months post-eclipse. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 -31-CYG STIS/CCD ACQ F25ND5 MIRROR 1 2.0 S (2 S) Comments: Exposure saturates in 38.54 sec. ------------------------------------------------------------------------------------------------------------------------------------ 2 -31-CYG STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.1 S (0.1 K D S) Comments: Exposure saturates in 1.15 sec. ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE STIS/FUV ACCUM 0.2X0.06 E140M 1425 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 4 -31-CYG STIS/FUV ACCUM 31X0.05ND E140M 1425 WAVECAL=NO 1 240 S -MAMA B see below (205 S) Comments: Total count rate 89138 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 5 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 1978 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 6 -31-CYG STIS/NUV ACCUM 31X0.05ND E230M 1978 1 195 S -MAMA B see below (160 S) Comments: Total count rate 66, 830 count/sec. ------------------------------------------------------------------------------------------------------------------------------------ 7 -31-CYG STIS/NUV ACCUM 31X0.05ND E230M 2707 1 101 S -MAMA B see below (66 S) Comments: Total count rate 98791 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 8 WAVE STIS/NUV ACCUM 0.2X0.06 E230M 2707 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 9 -31-CYG STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 68 S -MAMA see below (33 S) Comments: Total count rate 149654 counts/sec. ------------------------------------------------------------------------------------------------------------------------------------ 10 WAVE STIS/NUV ACCUM 0.2X0.09 E230H 2912 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 17416( 26) - 16-Aug-2024 17:28:59 - [ 25] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ -31-CYG 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A -31-CYG 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND WAVE 3 STIS/FUV ACCUM 0.2X0.06 E140M 1425 none none none none 1 N/A -MAMA -31-CYG 4 STIS/FUV ACCUM 31X0.05N E140M 1425 none none none none 1 205.0 S -MAMA DB WAVE 5 STIS/NUV ACCUM 0.2X0.06 E230M 1978 none none none none 1 N/A -MAMA -31-CYG 6 STIS/NUV ACCUM 31X0.05N E230M 1978 none none none none 1 160.0 S -MAMA DB -31-CYG 7 STIS/NUV ACCUM 31X0.05N E230M 2707 none none none none 1 66.0 S -MAMA DB WAVE 8 STIS/NUV ACCUM 0.2X0.06 E230M 2707 none none none none 1 N/A -MAMA -31-CYG 9 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 33.0 S -MAMA WAVE 10 STIS/NUV ACCUM 0.2X0.09 E230H 2912 none none none none 1 N/A -MAMA 17416( 26) - 16-Aug-2024 17:28:59 - [ 26] Summary Form for Proposal 17416 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 0.2X0.06, 0.2X0.09, 0.3X0.05ND, 31X0.05NDB, F25ND5 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/FUV-MAMA, STIS/NUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ, ACQ/PEAK ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters WAVECAL=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01, AFTER 02, AFTER 03, AFTER 04, AFTER 05, AFTER 09, AFTER 01-NOV-2025:00:00:00, BETWEEN 01-MAR-2025:00:00:00 AND 03-APR-2025:00:00:00, BETWEEN 01-NOV-2024:00:00:00 AND 12-DEC-2024:00:00:00, BETWEEN 10-MAR-2024:00:00:00 AND 21-MAR-2024:00:00:00, BETWEEN 13-FEB-2024:00:00:00 AND 15-FEB-2024:00:00:00, BETWEEN 16-FEB-2024:00:00:00 AND 19-FEB-2024:00:00:00, BETWEEN 20-APR-2024:00:00:00 AND 23-APR-2024:00:00:00, BETWEEN 21-DEC-2023:00:00:00 AND 16-JAN-2024:00:00:00, BETWEEN 23-MAR-2024:00:00:00 AND 04-APR-2024:00:00:00, SEQ 1-10 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements E140M, E230H, E230M, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names -31-CYG, WAVE ------------------------------------------------------------------------------------------------------------------------------------