6323( 8) - 12/13/95 11:43 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6323 Version: 8 Check-in Date: ********** 1.Proposal Title: Weak interstellar lines in the spectrum of Zeta Oph ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle Interstellar Medium GTO/HRS 5 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Dennis Ebbets Ball Aerospace and Communications Group CoI: Jason Cardelli Villanova University N ------------------------------------------------------------------------------------ 6. Abstract This proposal defines observations of four wavelengths in the interstellar spectrum of Zeta Ophiuchi. All are made with Echelle A, and will achieve signal to noise ratios near 350 per data point. The spectral regions include weak interstellar absorption lines of molecules, heavy elements and high ionization species that have not been detected in GHRS data with lower resolution and signal to noise. ------------------------------------------------------------------------------------ Observations Description ------------------------ Lines 10 - 30 define a standard GHRS onboard target acquisition, with an RTB search, double locate in the Large Science Aperture and a peakup in the Small Science Aperture. With an integration period (step time) of 0.2 sec, the counter will not saturate even with a bright star and mirror N1. Lines 100 - 120, 200 - 220, 300 - 320 and 400 - 420 accumulate the spectra of the four wavelength regions. Each region is observed at three independent central wavelengths, with a standard four step FP-SPLIT sequence at each. The twelve subexposures will each accumulate enough counts for a S/N = 100, and will reach approximately 350 when fully merged. We expect to detect lines as weak as 0.1 milli-Angstrom equivalent width. Real Time Justification ----------------------- No real-time resources are requested. Calibration Justification ------------------------- No special calibrations are requested. Additional Comments ------------------- Zeta Oph will remain in the Small Science Aperture for the duration of the observing sequence. Note that the wavecal/spybal exposures will be contaminated by the bright starlight. This should not cause a problem for the purposes of this program. ------------------------------------------------------------------------------------ 6323( 8) - 12/13/95 11:43 - [ 2] Data Distribution Media: 8MM Blocking Factor: 10 Ship To: GHRS IDT at Goddard Space Flight Center Ship Via: GHRS team will Email: hrsake@hrs.gsfc.nasa.gov , ------------------------------------------------------------------------------------ 6323( 8) - 12/13/95 11:43 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HD149757 ISM, Absorption Line RA=16H 37M 09.54S +/- 0.5S, DEC= 2000 V=2.56 System -10D 34' 01.7" +/- 0.5" F-CONT(1200)=3E-9 F-CONT(1620)=3.3E-9 6323( 8) - 12/13/95 11:43 - [ 4] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 HD149757 HRS ACQ 2.0 MIRROR-N1 SEARCH-SIZE=5, 1 5S ONBOARD ACQ FOR 20 BRIGHT=RETURN Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 20 HD149757 HRS ACQ/PEA 2.0 MIRROR-N1 1 20.4S ONBOARD ACQ FOR 30 KUP Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 30 HD149757 HRS ACQ/PEA 0.25 MIRROR-N1 SEARCH-SIZE=5 1 5S ONBOARD ACQ FOR 100-420 KUP Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 100 HD149757 HRS ACCUM 0.25 ECH-A45 1240.3 STEP-PATT=6, FP 1 691.2S -SPLIT=STD Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 110 HD149757 HRS ACCUM 0.25 ECH-A45 1240.8 STEP-PATT=6, FP 1 691.2S -SPLIT=STD Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 120 HD149757 HRS ACCUM 0.25 ECH-A45 1241.3 STEP-PATT=6, FP 1 691.2S -SPLIT=STD Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 200 HD149757 HRS ACCUM 0.25 ECH-A47 1191.8 STEP-PATT=6, FP 1 691.2S -SPLIT=STD Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 210 HD149757 HRS ACCUM 0.25 ECH-A47 1192.3 STEP-PATT=6, FP 1 691.2S -SPLIT=STD Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 220 HD149757 HRS ACCUM 0.25 ECH-A47 1192.8 STEP-PATT=6, FP 1 691.2S -SPLIT=STD Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 300 HD149757 HRS ACCUM 0.25 ECH-A35 1586.0 STEP-PATT=6, FP 1 691.2S -SPLIT=STD Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 310 HD149757 HRS ACCUM 0.25 ECH-A35 1586.5 STEP-PATT=6, FP 1 691.2S -SPLIT=STD Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 6323( 8) - 12/13/95 11:43 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 320 HD149757 HRS ACCUM 0.25 ECH-A35 1587.0 STEP-PATT=6, FP 1 691.2S -SPLIT=STD Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 400 HD149757 HRS ACCUM 0.25 ECH-A34 1649.5 STEP-PATT=6, FP 1 633.6S -SPLIT=STD Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 410 HD149757 HRS ACCUM 0.25 ECH-A34 1650.0 STEP-PATT=6, FP 1 633.6S -SPLIT=STD Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 420 HD149757 HRS ACCUM 0.25 ECH-A34 1650.5 STEP-PATT=6, FP 1 633.6S -SPLIT=STD Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 6323( 8) - 12/13/95 11:43 - [ 6] Summary Form for Proposal 6323 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations HRS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ ACQ/PEAKUP ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SEARCH-SIZE=5 BRIGHT=RETURN FP-SPLIT=STD STEP-PATT=6 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GTO/HRS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category Interstellar Medium ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ONBOARD ACQ FOR 20 ONBOARD ACQ FOR 30 ONBOARD ACQ FOR 100-420 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR-N1 ECH-A45 ECH-A47 ECH-A35 ECH-A34 ------------------------------------------------------------------------------------------------------------------------------------ Target Names HD149757 ------------------------------------------------------------------------------------------------------------------------------------