17104( 6) - 14-Jun-2024 14:48:58 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17104 Version: 6 Check-in Time: 14-Jun-2024 14:48:58 STScI Edit Number: 4 Title Repeated Stellar Wind Line Variability in O Stars in the SMC ------------------------------------------------------------------------------------ Type Cycle GO 30 ------------------------------------------------------------------------------------ Investigators Contact? PI: Mr. Matthew J Rickard University College London Y CoI: Dr. Wolf-Rainer Hamann Universitat Potsdam N CoI: Dr. Rainer Hainich Universitat Potsdam N CoI: Prof. Lidia Oskinova Universitat Potsdam N CoI: Dr. Derck L. Massa Space Science Institute N CoI: Prof. Raman K. Prinja University College London N CoI: Dr. Varsha Ramachandran Universitat Heidelberg N CoI: Daniel Pauli Universitat Potsdam N CoI: Mr. Timothy N Parsons University College London N ------------------------------------------------------------------------------------ Abstract Massive stars dominate the space surrounding them, as the source of ionising flux, by the feedback from their winds and from dramatic cataclysmic events such as supernova. Understanding the physics of massive star winds is critical to various fields of astrophysics. A large area of tension is the so-called weak wind problem, with measured mass-loss rates from stellar winds from late O stars being lower than hydrodynamical predictions. In particular, it is suggested that the weak wind problem affects earlier O types within the low-metallicity galaxies, such as the SMC, compared to the Milky Way. However, for low-metallicity stars, these conclusions are based on only a very small number of analyzed stars. By inspecting the archival UV spectra of the commonly cited stars, we find that the wind lines of these stars are often variable. This variability appears to be cyclic, and hence resembling the ambiguous variability observed in Galactic O stars on time scales comparable to the rotational periods. This cyclic variability is commonly explained by the presence of large scale co-rotating structures within stellar winds. In low metallicity stars, this type of variability has never yet been studied but is urgently needed. We propose a highly efficient series of long slit UV spectrograph observations of seven late O type stars in NGC 346, the most massive star cluster in the SMC. Taken over 15 orbits, these observations will be equally spaced to monitor the variability of the CIV doublet 1548.2 - 1550.8 wind lines over multiple rotation periods of the targets. This will finally resolve questions about the structure of stellar winds at low metallicity. ------------------------------------------------------------------------------------ Observations Description ------------------------ On each visit we will take 3 STIS G140M observations, covering 1513-1567A in the UV, of 6 O Stars. We will revisit them every 11 orbits until a total of 15 visits have been made. This is a revision of the Phase 1 proposal which 17104( 6) - 14-Jun-2024 14:48:58 - [ 2] proposed 7 O stars. This would have required mid-orbit reorientation. The time constraints needed to target acquire after such an orientation change would have limited our exposure time. Instead, we lose one of our lowest priority targets and observe in the same orientation throughout each visit. We target acquire NGC-346-NMC-17 (O8V) for accurate positioning of our first long slit exposure, and we use relative RA and DEC shifts to position our other two observations accurately. Coordinates are ICRS J2016 coordinates from Gaia DR3, verified on sky from archival Hubble F225W images. The relative offsets are confirmed in the same IRCS frame. We note the 3arcsec offset required due to the repeller wire (STIS IHB 7.6.1) and the fiducial bar, brought by this shift on to the used portion of the MAMA detector, the lowest Y axis position fiducial bar (STIS IHB 13.2.6) and ensure neither obscures our targets. The proper motion (PM) of NMC-17 is taken from Gaia DR3 and used to aid target acquisition. For the our other two slits, only one target within each has a proper motion. However, all objects are thought to be members of NGC 346 and this is shown by the common proper motion, as all three known proper motions are within the ranges PMRA 0.4 to 0.8 mas/yr and PMDEC -0.9 to -1.6 mas/yr. The inherited PMRA 0.8 mas/yr and PMDEC -1.6 mas/yr of NMC-17 is acceptable for the two other positions as the largest movement we might expect from the PM adjusted J2016 epoch during Cycle 30 is 0.01arcseconds. An orientation of either 79degrees or 259degrees North through East gives us best coverage of our targets. Due to the offset of the slit to the MAMA sensor, we cannot specify both, and so 259degrees is selected due to having the greater schedulability. This is given as 304degrees for our visits due to the 45degrees offset of STIS from the +U3 axis (P2PI Table 6.2). Due to the multiple objects within each slit and the requirement for a constant angle throughout each visit, not every target is centred within the dispersal axis. Despite this, experience of working with STIS G140M observations has shown that the loss of data in the dispersal direction is minimal and will not impact upon our science goals. We note that changing schedulability down to 80 percent does not reduce the the schedulability of our observations and enables us to exceed our target exposure time. Each visit is scheduled for a factor of 11 visits (+1/-1 visit) from Visit 1. This is to ensure that the program is not interrupted if one observation is missed due to technical reasons. ------------------------------------------------------------------------------------ 17104( 6) - 14-Jun-2024 14:48:58 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-346-NMC- EXT-STAR, MAIN SEQUENCE RA=00H59M6.7498S +/- 0", J2000 V = 165 V = 14.33 +/- 0.07 17 O DEC=-72D10'41.26" +/- 0" Reference Frame: ICRS Extended: NO Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2016.0 1.763273659168872E-4 -0.0015589999999999998 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-346-B EXT-STAR, MAIN SEQUENCE RA-OFF=-0.00218222D, J2000 V = 14.82 O DEC-OFF=-0.00232088D, FROM 3 Reference Frame: ICRS Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC-346-A EXT-STAR, MAIN SEQUENCE RA-OFF=-0.0218385D, J2000 V = 13.13 O DEC-OFF=0.0013541D, FROM 3 Reference Frame: ICRS Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 17104( 6) - 14-Jun-2024 14:48:58 - [ 4] Visit: 01 (NGC346) Visit Requirements: SCHED 80%; ORIENT 304D TO 304 D On Hold Comments: Additional Comments: UV observations of 3 long slits covering 6 massive O star dwarfs 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 NGC-346-NMC STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) -17 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-346-NMC STIS/FUV ACCUM 52X2 G140M 1540 1 860 S -17 -MAMA see below (865 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-346-B STIS/FUV ACCUM 52X2 G140M 1540 1 625 S -MAMA see below (630 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-346-A STIS/FUV ACCUM 52X2 G140M 1540 1 520 S -MAMA see below (525 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-346-NMC-17 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A NGC-346-NMC-17 2 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 865.0 S -MAMA NGC-346-B 3 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 630.0 S -MAMA NGC-346-A 4 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 525.0 S -MAMA 17104( 6) - 14-Jun-2024 14:48:58 - [ 5] Visit: 02 (NGC346) Visit Requirements: SCHED 80%; ORIENT 304D TO 304 D; AFTER 01 BY 13.9 Orbits TO 16.1 Orbits On Hold Comments: Additional Comments: UV observations of 3 long slits covering 6 massive O star dwarfs 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 NGC-346-NMC STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) -17 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-346-NMC STIS/FUV ACCUM 52X2 G140M 1540 1 860 S -17 -MAMA see below (865 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-346-B STIS/FUV ACCUM 52X2 G140M 1540 1 625 S -MAMA see below (630 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-346-A STIS/FUV ACCUM 52X2 G140M 1540 1 520 S -MAMA see below (525 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-346-NMC-17 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A NGC-346-NMC-17 2 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 865.0 S -MAMA NGC-346-B 3 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 630.0 S -MAMA NGC-346-A 4 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 525.0 S -MAMA 17104( 6) - 14-Jun-2024 14:48:58 - [ 6] Visit: 03 (NGC346) Visit Requirements: SCHED 80%; ORIENT 304D TO 304 D; AFTER 01 BY 28.9 Orbits TO 31.1 Orbits On Hold Comments: Additional Comments: UV observations of 3 long slits covering 6 massive O star dwarfs 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 NGC-346-NMC STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) -17 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-346-NMC STIS/FUV ACCUM 52X2 G140M 1540 1 860 S -17 -MAMA see below (865 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-346-B STIS/FUV ACCUM 52X2 G140M 1540 1 625 S -MAMA see below (630 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-346-A STIS/FUV ACCUM 52X2 G140M 1540 1 520 S -MAMA see below (525 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-346-NMC-17 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A NGC-346-NMC-17 2 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 865.0 S -MAMA NGC-346-B 3 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 630.0 S -MAMA NGC-346-A 4 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 525.0 S -MAMA 17104( 6) - 14-Jun-2024 14:48:58 - [ 7] Visit: 04 (NGC346) Visit Requirements: SCHED 80%; ORIENT 304D TO 304 D; AFTER 01 BY 43.9 Orbits TO 46.1 Orbits On Hold Comments: Additional Comments: UV observations of 3 long slits covering 6 massive O star dwarfs 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 NGC-346-NMC STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) -17 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-346-NMC STIS/FUV ACCUM 52X2 G140M 1540 1 860 S -17 -MAMA see below (865 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-346-B STIS/FUV ACCUM 52X2 G140M 1540 1 625 S -MAMA see below (630 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-346-A STIS/FUV ACCUM 52X2 G140M 1540 1 520 S -MAMA see below (525 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-346-NMC-17 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A NGC-346-NMC-17 2 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 865.0 S -MAMA NGC-346-B 3 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 630.0 S -MAMA NGC-346-A 4 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 525.0 S -MAMA 17104( 6) - 14-Jun-2024 14:48:58 - [ 8] Visit: 05 (NGC346) Visit Requirements: SCHED 80%; ORIENT 304D TO 304 D; AFTER 01 BY 58.9 Orbits TO 61.1 Orbits On Hold Comments: Additional Comments: UV observations of 3 long slits covering 6 massive O star dwarfs 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 NGC-346-NMC STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) -17 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-346-NMC STIS/FUV ACCUM 52X2 G140M 1540 1 860 S -17 -MAMA see below (865 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-346-B STIS/FUV ACCUM 52X2 G140M 1540 1 625 S -MAMA see below (630 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-346-A STIS/FUV ACCUM 52X2 G140M 1540 1 520 S -MAMA see below (525 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-346-NMC-17 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A NGC-346-NMC-17 2 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 865.0 S -MAMA NGC-346-B 3 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 630.0 S -MAMA NGC-346-A 4 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 525.0 S -MAMA 17104( 6) - 14-Jun-2024 14:48:58 - [ 9] Visit: 06 (NGC346) Visit Requirements: SCHED 80%; ORIENT 304D TO 304 D; AFTER 01 BY 73.9 Orbits TO 76.1 Orbits On Hold Comments: Additional Comments: UV observations of 3 long slits covering 6 massive O star dwarfs 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 NGC-346-NMC STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) -17 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-346-NMC STIS/FUV ACCUM 52X2 G140M 1540 1 860 S -17 -MAMA see below (865 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-346-B STIS/FUV ACCUM 52X2 G140M 1540 1 625 S -MAMA see below (630 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-346-A STIS/FUV ACCUM 52X2 G140M 1540 1 520 S -MAMA see below (525 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-346-NMC-17 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A NGC-346-NMC-17 2 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 865.0 S -MAMA NGC-346-B 3 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 630.0 S -MAMA NGC-346-A 4 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 525.0 S -MAMA 17104( 6) - 14-Jun-2024 14:48:58 - [ 10] Visit: 07 (NGC346) Visit Requirements: SCHED 80%; ORIENT 304D TO 304 D; AFTER 01 BY 88.1 Orbits TO 91.1 Orbits On Hold Comments: Additional Comments: UV observations of 3 long slits covering 6 massive O star dwarfs 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 NGC-346-NMC STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) -17 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-346-NMC STIS/FUV ACCUM 52X2 G140M 1540 1 860 S -17 -MAMA see below (865 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-346-B STIS/FUV ACCUM 52X2 G140M 1540 1 625 S -MAMA see below (630 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-346-A STIS/FUV ACCUM 52X2 G140M 1540 1 520 S -MAMA see below (525 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-346-NMC-17 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A NGC-346-NMC-17 2 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 865.0 S -MAMA NGC-346-B 3 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 630.0 S -MAMA NGC-346-A 4 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 525.0 S -MAMA 17104( 6) - 14-Jun-2024 14:48:58 - [ 11] Visit: 08 (NGC346) Visit Requirements: SCHED 80%; ORIENT 304D TO 304 D; AFTER 01 BY 103.9 Orbits TO 106.1 Orbits On Hold Comments: Additional Comments: UV observations of 3 long slits covering 6 massive O star dwarfs 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 NGC-346-NMC STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) -17 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-346-NMC STIS/FUV ACCUM 52X2 G140M 1540 1 860 S -17 -MAMA see below (865 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-346-B STIS/FUV ACCUM 52X2 G140M 1540 1 625 S -MAMA see below (630 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-346-A STIS/FUV ACCUM 52X2 G140M 1540 1 520 S -MAMA see below (525 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-346-NMC-17 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A NGC-346-NMC-17 2 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 865.0 S -MAMA NGC-346-B 3 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 630.0 S -MAMA NGC-346-A 4 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 525.0 S -MAMA 17104( 6) - 14-Jun-2024 14:48:58 - [ 12] Visit: 09 (NGC346) Visit Requirements: SCHED 80%; ORIENT 304D TO 304 D; AFTER 01 BY 117.1 Orbits TO 121.1 Orbits On Hold Comments: Additional Comments: UV observations of 3 long slits covering 6 massive O star dwarfs 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 NGC-346-NMC STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) -17 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-346-NMC STIS/FUV ACCUM 52X2 G140M 1540 1 860 S -17 -MAMA see below (865 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-346-B STIS/FUV ACCUM 52X2 G140M 1540 1 625 S -MAMA see below (630 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-346-A STIS/FUV ACCUM 52X2 G140M 1540 1 520 S -MAMA see below (525 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-346-NMC-17 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A NGC-346-NMC-17 2 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 865.0 S -MAMA NGC-346-B 3 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 630.0 S -MAMA NGC-346-A 4 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 525.0 S -MAMA 17104( 6) - 14-Jun-2024 14:48:58 - [ 13] Visit: 10 (NGC346) Visit Requirements: SCHED 80%; ORIENT 304D TO 304 D; AFTER 01 BY 132.9 Orbits TO 136.1 Orbits On Hold Comments: Additional Comments: UV observations of 3 long slits covering 6 massive O star dwarfs 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 NGC-346-NMC STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) -17 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-346-NMC STIS/FUV ACCUM 52X2 G140M 1540 1 860 S -17 -MAMA see below (865 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-346-B STIS/FUV ACCUM 52X2 G140M 1540 1 625 S -MAMA see below (630 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-346-A STIS/FUV ACCUM 52X2 G140M 1540 1 520 S -MAMA see below (525 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-346-NMC-17 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A NGC-346-NMC-17 2 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 865.0 S -MAMA NGC-346-B 3 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 630.0 S -MAMA NGC-346-A 4 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 525.0 S -MAMA 17104( 6) - 14-Jun-2024 14:48:58 - [ 14] Visit: 11 (NGC346) Visit Requirements: SCHED 80%; ORIENT 304D TO 304 D; AFTER 01 BY 147.9 Orbits TO 151 Orbits On Hold Comments: Additional Comments: UV observations of 3 long slits covering 6 massive O star dwarfs 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 NGC-346-NMC STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) -17 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-346-NMC STIS/FUV ACCUM 52X2 G140M 1540 1 860 S -17 -MAMA see below (865 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-346-B STIS/FUV ACCUM 52X2 G140M 1540 1 625 S -MAMA see below (630 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-346-A STIS/FUV ACCUM 52X2 G140M 1540 1 520 S -MAMA see below (525 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-346-NMC-17 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A NGC-346-NMC-17 2 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 865.0 S -MAMA NGC-346-B 3 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 630.0 S -MAMA NGC-346-A 4 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 525.0 S -MAMA 17104( 6) - 14-Jun-2024 14:48:58 - [ 15] Visit: 12 (NGC346) Visit Requirements: SCHED 80%; ORIENT 304D TO 304 D; AFTER 01 BY 162.9 Orbits TO 166.1 Orbits On Hold Comments: Additional Comments: UV observations of 3 long slits covering 6 massive O star dwarfs 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 NGC-346-NMC STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) -17 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-346-NMC STIS/FUV ACCUM 52X2 G140M 1540 1 860 S -17 -MAMA see below (865 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-346-B STIS/FUV ACCUM 52X2 G140M 1540 1 625 S -MAMA see below (630 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-346-A STIS/FUV ACCUM 52X2 G140M 1540 1 520 S -MAMA see below (525 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-346-NMC-17 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A NGC-346-NMC-17 2 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 865.0 S -MAMA NGC-346-B 3 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 630.0 S -MAMA NGC-346-A 4 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 525.0 S -MAMA 17104( 6) - 14-Jun-2024 14:48:58 - [ 16] Visit: 13 (NGC346) Visit Requirements: SCHED 80%; ORIENT 304D TO 304 D; AFTER 01 BY 177.9 Orbits TO 184.1 Orbits On Hold Comments: Additional Comments: UV observations of 3 long slits covering 6 massive O star dwarfs 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 NGC-346-NMC STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) -17 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-346-NMC STIS/FUV ACCUM 52X2 G140M 1540 1 860 S -17 -MAMA see below (865 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-346-B STIS/FUV ACCUM 52X2 G140M 1540 1 625 S -MAMA see below (630 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-346-A STIS/FUV ACCUM 52X2 G140M 1540 1 520 S -MAMA see below (525 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-346-NMC-17 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A NGC-346-NMC-17 2 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 865.0 S -MAMA NGC-346-B 3 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 630.0 S -MAMA NGC-346-A 4 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 525.0 S -MAMA 17104( 6) - 14-Jun-2024 14:48:58 - [ 17] Visit: 14 (NGC346) Visit Requirements: SCHED 80%; ORIENT 304D TO 304 D; AFTER 01 BY 192.9 Orbits TO 196.1 Orbits On Hold Comments: Additional Comments: UV observations of 3 long slits covering 6 massive O star dwarfs 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 NGC-346-NMC STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) -17 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-346-NMC STIS/FUV ACCUM 52X2 G140M 1540 1 860 S -17 -MAMA see below (865 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-346-B STIS/FUV ACCUM 52X2 G140M 1540 1 625 S -MAMA see below (630 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-346-A STIS/FUV ACCUM 52X2 G140M 1540 1 520 S -MAMA see below (525 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-346-NMC-17 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A NGC-346-NMC-17 2 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 865.0 S -MAMA NGC-346-B 3 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 630.0 S -MAMA NGC-346-A 4 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 525.0 S -MAMA 17104( 6) - 14-Jun-2024 14:48:58 - [ 18] Visit: 15 (NGC346) Visit Requirements: SCHED 70%; ORIENT 304D TO 304 D On Hold Comments: Additional Comments: UV observations of 3 long slits covering 6 massive O star dwarfs Was 207.9 to 211.1 orbits after V01. 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 NGC-346-NMC STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) GS ACQ SCENARIO BASE1O3 -17 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-346-NMC STIS/FUV ACCUM 52X2 G140M 1540 1 860 S -17 -MAMA see below (865 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-346-B STIS/FUV ACCUM 52X2 G140M 1540 1 625 S -MAMA see below (630 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-346-A STIS/FUV ACCUM 52X2 G140M 1540 1 520 S -MAMA see below (525 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-346-NMC-17 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A NGC-346-NMC-17 2 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 865.0 S -MAMA NGC-346-B 3 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 630.0 S -MAMA NGC-346-A 4 STIS/FUV ACCUM 52X2 G140M 1540 none none none none 1 525.0 S -MAMA 17104( 6) - 14-Jun-2024 14:48:58 - [ 19] Summary Form for Proposal 17104 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 52X2, F28X50LP ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/FUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 103.9 Orbits TO 106.1 Orbits, AFTER 01 BY 117.1 Orbits TO 121.1 Orbits, AFTER 01 BY 13.9 Orbits TO 16.1 Orbits, AFTER 01 BY 132.9 Orbits TO 136.1 Orbits, AFTER 01 BY 147.9 Orbits TO 151 Orbits, AFTER 01 BY 162.9 Orbits TO 166.1 Orbits, AFTER 01 BY 177.9 Orbits TO 184.1 Orbits, AFTER 01 BY 192.9 Orbits TO 196.1 Orbits, AFTER 01 BY 28.9 Orbits TO 31.1 Orbits, AFTER 01 BY 43.9 Orbits TO 46.1 Orbits, AFTER 01 BY 58.9 Orbits TO 61.1 Orbits, AFTER 01 BY 73.9 Orbits TO 76.1 Orbits, AFTER 01 BY 88.1 Orbits TO 91.1 Orbits, GS ACQ SCENARIO BASE1O3, ORIENT 304D TO 304 D, SCHED 70%, SCHED 80% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G140M, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC-346-A, NGC-346-B, NGC-346-NMC-17 ------------------------------------------------------------------------------------------------------------------------------------