12030( 3) - 06-Jul-2010 12:04:24 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12030 Version: 3 Check-in Time: 06-Jul-2010 12:04:24 STScI Edit Number: 0 Title COS-GTO: STIS high resolution observations of the local ISM ------------------------------------------------------------------------------------ Type Cycle GTO/COS 18 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. James C. Green University of Colorado at Boulder CoI: Dr. Barry Welsh University of California - Berkeley Y CoI: Dr. Steven V. Penton University of Colorado at Boulder N CoI: Dr. Cynthia Froning University of Colorado at Boulder N ------------------------------------------------------------------------------------ Abstract We shall use bright early-type B stars located within 150pc of the Sun to probe the absorption properties of the interstellar gas associated with the local cavity. By utilizing the high sensitivity and high spectral resolution of the HST-STIS spectrograph we shall be able to place new detection limits on absorption occurring in any highly ionized gas associated with the lines of NV, SiIV and CIV that may be present along these sight-lines within the local cavity. These data will be used to test current theoretical models that generally predict far higher absorption column densities than have been previously found. Also, the high spectral resolution will enable far stricter limits to be placed on the thermal widths of such highly ionized absorption lines, which previous observations towards the Loop I region have suggested anomalously narrow profiles consistent with their formation by either photo ionization or highly non-equilibrium processes. ------------------------------------------------------------------------------------ Observations Description ------------------------ STIS observations of Post-AGB stars in nearby Globular Clusters. We have adopted the following strategy for target acquisition 1) ACQ with the F25ND5 2) ACQ/PEAK with the 0.3x0.05ND All science exposures are taken in STIS/E140H/(1307, 1343A or 1598A)/ACCUM mode. All science exposures are taken with the 0.2x0.05ND filter, unless the object is too bright, then use 0.3x0.05ND Real Time Justification ----------------------- Calibration Justification ------------------------- 12030( 3) - 06-Jul-2010 12:04:24 - [ 2] Additional Comments ------------------- Only one target (ALCAID) is observed in this cycle. Prepared by Steven Penton, steven.penton@colorado.edu, 303-492-0407. Please use the above contact for any technical questions about this proposal. Co-I Welsh is the science contact. ------------------------------------------------------------------------------------ 12030( 3) - 06-Jul-2010 12:04:24 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HD120315 STAR, B3-B5 V-IV, RA=13H47M32.4377S +/- 0.1", J2000 V = V = 1.852 +/- 0.01 F(1300)=8E-9, REGULAR VARIABLE DEC=+49D18'47.75" +/- 0.1" -10.9 F(1800)=8E-9, F(2800)=3E-9 Reference Frame: ICRS Comments: V (1.852), Parallax (0.03289), and PM (-0.12121, -0.01556), RA PM = -0.12123/(15*cos(49, 18, 47.81))= -0.012397246 IUE swp54523 gives fluxes are F(1300) = 1E-8 & F(1600) = 9E-9, (large aperture, high dispersion). GHRS observations (Z3CL020ET) gives F(1330) = 1.6E-8 This target is on hold until we determine if it passes the BOP. This target is not scheduled for Cycle 17. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 -0.012397176 -0.01556 0.03239 ------------------------------------------------------------------------------------------------------------------------------------ 12030( 3) - 06-Jul-2010 12:04:24 - [ 4] Visit: 04 Visit Requirements: On Hold Comments: Additional Comments: E140H, 1160s @1307, then 410s @1598. The target is very bright, so we use the ND filter during ACQ, and the 0.3x0.05ND for ACQ/PEAK and 1307A setting, 0.2x0.05ND for 1598A setting. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD120315 STIS/CCD ACQ F25ND5 MIRROR 1 0.5 S Comments: Fluxes from IUE SWP26249 (low dispersion, large aperture) are F(1300)=8E-9, F(1500) = 6E-9, and GHRS (Z2ML0406T) F(2800)=3.8E-9 and STIS (O45P020Y0) F(1800) = 8E-9 Target Acq (ACQ) simulated as: 1) (STIS161626) Bruzual, B3V, V=1.852, E(B-V)=0.04, F25ND5 gives S/N=40 in0.0934 s, saturation in 15 seconds. 2) (STIS161627) Bruzual, B2V, F(1800)=8E-9, E(B-V)=0.04, F25ND5 gives S/N=40 in 0.0905 s, saturation in 14.6 seconds 3) (STIS163176) Bruzual, B2V, F(2800)=3.8E-9, E(B-V)=0.04, F25ND5 gives S/N=40 in 0.0628 s, saturation in 10.1 seconds An exposure time of 0.5 seconds should be safe and provide very high S/N. ------------------------------------------------------------------------------------------------------------------------------------ 12030( 3) - 06-Jul-2010 12:04:24 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 2 HD120315 STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.1 S K D Comments: Because we are observing with a slit < 0.1 arcseconds wide, we need to perform an ACQ/PEAK. Target Acq simulated as: 1) (STIS161672) Bruzual, B3V, V=1.852, E(B-V)=0.04, 0.3x0.05N Dgives S/N=40 in 0.0040s, saturation in 0.20 seconds. 2) (STIS161668) Bruzual, B3V, F(1800)=8E-9, E(B-V)=0.04, 0.3x0.05ND gives S/N=40 in 0.0039 s, saturation in 0.19 seconds 3) (STIS163192) Bruzual, B3V, F(2800)=3.8E-9, E(B-V)=0.04, 0.3x0.05ND gives S/N=40 in 0.0027 s, saturation in 0.13 seconds An exposure time of 0.1 seconds (the minimum) should be safe and provide high extremely high S/N (400) ------------------------------------------------------------------------------------------------------------------------------------ 12030( 3) - 06-Jul-2010 12:04:24 - [ 6] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 3 HD120315 STIS/FUV ACCUM 0.3X0.05N E140H 1343 1 1153 S -MAMA D Comments: Fluxes from IUE SWP26249 (low dispersion, large aperture) are F(1300)=8E-9, F(1500) = 6E-9, and GHRS (Z2ML0406T) F(2800)=3.8E-9 and STIS (O45P020Y0) F(1800) = 8E-9 Simulated as 1) (STIS162040) Bruzual, B3V, V=1.852, E(B-V)=0.04, 0.3x0.05ND gives S/N=40 in 1700s 2) (STIS162099) Bruzual, B3V, F(1800)=8E-9, E(B-V)=0.04, 0.3x0.05ND gives S/N= 40 in 1926s 3) (STIS163066) Bruzual, B3V, F(2800)=3.8E-9, E(B-V)=0.04, 0.3x0.05ND gives S/N =40 in 1214s Assume the middle value (S/N = 40 in 1700s) We have about 1570 seconds for both this observation and the 1598A one. S/N=40 does not seem achievable, instead the best compromise is ET1307+ET1598=1570s & SN1307=SN1598 SN1307=sqrt(1600* (ET1307/1700)) & SN1598=sqrt(1600* (ET1598/600)) or, ET1307/1700= ET1598/600 or 1570=ET1307*(1+600/1700), ET1307 = 1160s & ET1598=1570-1160= 410s S/N> 30 (1307A), > 32 (1598A) (see STIS162870, STIS162854) ------------------------------------------------------------------------------------------------------------------------------------ 12030( 3) - 06-Jul-2010 12:04:24 - [ 7] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 4 HD120315 STIS/FUV ACCUM 0.2X0.05N E140H 1598 1 411 S -MAMA D Comments: Fluxes from IUE SWP26249 (low dispersion, large aperture) are F(1300)=8E-9, F(1500) = 6E-9, and GHRS (Z2ML0406T) F(2800)=3.8E-9 and STIS (O45P020Y0) F(1800) = 8E-9 Simulated as (0.2x0.05ND) 1) (STIS161898) Bruzual, B3V, V=1.852, E(B-V)=0.04, 0.2x0.05ND gives S/N=40 in 637s 2) (STIS161980) Bruzual, B3V, F(1800)=8E-9, E(B-V)=0.04, 0.2x0.05ND gives S/N= 40 in 616s 3) (STIS163128) Bruzual, B3V, F(2800)=3.8E-9, E(B-V)=0.04, 0.2x0.05ND gives S/N =40 in 427s ET is set to balance S/N with 1307 observation. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ HD120315 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A HD120315 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND HD120315 3 STIS/FUV ACCUM 0.3X0.05 E140H 1343 none none none none 1 N/A -MAMA ND HD120315 4 STIS/FUV ACCUM 0.2X0.05 E140H 1598 none none none none 1 N/A -MAMA ND 12030( 3) - 06-Jul-2010 12:04:24 - [ 8] Summary Form for Proposal 12030 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 0.2X0.05ND, 0.3X0.05ND, F25ND5 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/FUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ, ACQ/PEAK ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements E140H, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names HD120315 ------------------------------------------------------------------------------------------------------------------------------------