6619( 8) - 11/03/98 10:59 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6619 Version: 8 Check-in Date: 03-Nov-1998 10:58:40 1.Proposal Title: High-Resolution Images of QSO Lyman-alpha Absorbing Galaxies ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 6 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Kenneth Lanzetta State University of New York CoI: John K. Webb University of New South Wales N CoI: Xavier Barcons Instituto de Fi sica de Cantabria N CoI: Hsiao--Wen Chen University of Illinois N ------------------------------------------------------------------------------------ 5. Abstract Combining HST spectra of QSOs with ground-based spectroscopy of faint galaxies, we have been pursuing a program to directly identify the objects responsible for low- and intermediate- redshift QSO Ly-alpha\ absorption systems. Our results suggest that a significant fraction of intermediate-redshift Ly-alpha\ absorbers arise in very extended gaseous regions around galaxies. However, with existing ground-based images we are unable to clearly resolve the galaxies we identify. Thus we cannot tell how QSO absorption characteristics depend on galaxy morphological type, structural parameters, or angular inclinations and orientations. Here we propose to obtain high-resolution WFPC2 images of carefully selected fields centered on HST target QSOs. We will then have the exciting possibility of carrying out detailed studies of specific galaxies that are already known to be associated with specific QSO absorption systems. For the first time, it will be possible to learn how the QSO absorption characteristics relate to galaxy morphological type, what the gaseous geometry of those galaxies is, and how the inclination and orientation of the galaxy with respect to the QSO line of sight affect the absorption properties. ------------------------------------------------------------------------------------ 6619( 8) - 11/03/98 10:59 - [ 2] Observations Description ------------------------ We plan to acquire high-resolution images of galaxies using WFPC2 with the 702W filter. The galaxies of interest have total magnitudes in the range R ~ 18.5 - 22.0 and redshifts in the range z ~ 0.05 - 0.7. Each field contains between five and 22 ``interesting'' galaxies, with an average of nine interesting galaxies per field. Most of the interesting galaxies can be observed in a single 2.5 * 2.5 arcmin^2 WFPC2 frame. Orientations of the exposures will be chosen to include as many interesting galaxies as possible. Our previous experience indicates that images acquired in one orbit (with exposures of three times 600 s and no dithering) are sufficient to yield accurate measurements of morphology, disk and bulge effective radii and central surface brightnesses, disk-to-bulge ratios, and angular inclinations and orientations for the galaxies of our sample. Specifically, we find that images acquired in one orbit are sufficient to distinguish exponential disk from r^1/4 bulge surface brightness profiles, to determine disk and bulge effective radii to within typically ~ 0.1 arcsec, and to determine angular inclinations and orientations to within typically ~ 0.5 degree. We request 14 images over 14 orbits in order to complete our sample of 23 fields. A sample of this size is required to derive statistically meaningful results and to make full use of the potential of the existing ground-based observations. Each field is centered on a bright (V ~ 16) QSO, but at an exposure time of 600 s per exposure we calculate that only the central five pixels or so will be saturated. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ Data Distribution Paper Products: Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: Email: ------------------------------------------------------------------------------------ 6619( 8) - 11/03/98 10:59 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD- GALAXY, QSO RA = 00H 47M 04.37S +/- 0.07S, 2000 Z=0.624 V = 16.00+/-0.5 004705+03195 DEC = +3D 19' 32.1" +/- 1.0", 7 PLATE-ID=04YC Comments: POINTING POSITION IS 20 ARCSEC WEST AND 25 ARCSEC SOUTH OF THE QSO 0044+0303 2 FIELD-012528 GALAXY, QSO RA = 01H 25M 29.5S +/- 0.07S, 2000 Z=1.070 V = 16.70+/-0.5 -000555 DEC = -00D 06' 15.8" +/- 1.0", B-V = 0.28+/-0.1 PLATE-ID=00WT Comments: POINTING POSITION IS 10 ARCSEC EAST AND 20 ARCSEC SOUTH OF THE QSO 0122-0023 3 FIELD-040748 GALAXY, QSO RA = 04H 07M 50.74S +/- 0.07S, 2000 Z=0.574 V = 15.35+/-0.5 -121136 DEC = -12D 13' 01.2" +/- 1.0", B-V = 0.18+/-0.1 PLATE-ID=0238 Comments: POINTING POSITION IS 35 ARCSEC EAST 85 ARCSEC SOURTH OF THE QSO 0405-1219 4 QSO-040748- GALAXY, QSO RA = 04H 07M 47.02S +/- 0.07S, 2000 Z=0.574 V = 15.35+/-0.5 121136 DEC = -12D 11' 30.9" +/- 1.0", B-V = 0.18+/-0.1 PLATE-ID=0238 Comments: POINTING POSITION IS 20 ARCSEC WEST 5 ARCSEC NORTH OF THE QSO 0405-1219 5 FIELD-063546 GALAXY, QSO RA = 06H 35M 45.36S +/- 0.07S, 2000 Z=0.656 V = 15.75+/-0.5 -751617 DEC = -75D 15' 46.9" +/- 1.0", B-V = 0.33+/-0.1 PLATE-ID=0095 Comments: POINTING POSITION IS 5 ARCSEC WEST AND 30 ARCSEC NORTH OF THE QSO 0637-7513 6 FIELD- GALAXY, QSO RA = 09H 06M 32.61S +/- 0.07S, 2000 Z=0.411 V = 18.27+/-0.5 090631+16461 DEC = +16D 46' 31.5" +/- 1.0", B-V = 0.21+/-0.1 1 PLATE-ID=0204 Comments: POINTING POSITION IS 10 ARCSEC EAST AND 20 ARCSEC NORTH OF THE QSO 0903+1658 7 FIELD-113910 GALAXY, QSO RA = 11H 39M 9.33S +/- 0.07S, 2000 Z=0.557 V = 16.08+/-0.5 -135043 DEC = -13D 50' 23.3" +/- 1.0", B-V = 0.07+/-0.1 PLATE-ID=03YF Comments: POINTING POSITION IS 20 ARCSEC WEST AND 20 ARCSEC NORTH OF THE QSO 1136-1334 8 QSO- GALAXY, QSO RA = 12H 19M 19.860S +/- 0.07S, 2000 Z=0.334 V = 15.68+/-0.5 121920+06384 DEC = +06D 39' 10.10" +/- 1.0" 0 Comments: POINTING POSITION IS 15 ARCSEC WEST AND 30 ARCSEC NORTH OF THE QSO 1216+0655 9 FIELD- GALAXY, QSO RA = 12H 19M 21.54S +/- 0.07S, 2000 Z=0.334 V = 15.68+/-0.5 121920+06384 DEC = +06D 38' 10.10" +/- 1.0", 0 PLATE-ID=019S Comments: POINTING POSITION IS 10 ARCSEC EAST AND 30 ARCSEC SOUTH OF THE QSO 1216+0655 10 QSO- GALAXY, QSO RA = 13H 01M 12.27S +/- 0.07S, 2000 Z=0.472 V = 15.60+/-0.5 130112+59020 DEC = +59D 02' 31.6" +/- 1.0", 6 PLATE-ID=01R2 Comments: POINTING POSITION IS 5 ARCSEC WEST AND 25 ARCSEC NORTH OF THE QSO 1259+5918 6619( 8) - 11/03/98 10:59 - [ 4] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 11 FIELD- GALAXY, QSO RA = 13H 01M 14.22S +/- 0.07S, 2000 Z=0.472 V = 15.60+/-0.5 130112+59020 DEC = +59D 01' 51.6" +/- 1.0", 6 PLATE-ID=01R2 Comments: POINTING POSITION IS 10 ARCSEC EAST AND 15 ARCSEC SOUTH OF THE QSO 1259+5918 12 FIELD-142738 GALAXY, QSO RA = 14H 27M 38.17S +/- 0.07S, 2000 Z=0.806 V = 16.49+/-0.5 -120350 DEC = -12D 03' 50.4" +/- 1.0", B-V = 0.42+/-0.1 PLATE-ID=015S Comments: POINTING POSITION IS AT THE QSO 1424-1150 13 FIELD- GALAXY, QSO RA = 16H 42M 55.36S +/- 0.07S, 2000 Z=0.595 V = 15.96+/-0.5 164258+39483 DEC = +39D 48' 31.6" +/- 1.0", B-V = 0.29+/-0.1 6 PLATE-ID=00CL Comments: POINTING POSITION IS 40 ARCSEC WEST AND 5 ARCSEC SOUTH OF THE QSO 1641+3954 14 FIELD- GALAXY, QSO RA = 22H 53M 58.170S +/- 0.07S, 2000 Z=0.859 V = 16.10+/-0.5 225357+16085 DEC = +16D 09' 06.05" +/- 1.0", B-V = 0.47+/-0.1 3 PLATE-ID=00GO Comments: POINTING POSITION IS AT THE QSO 2251+1552 6619( 8) - 11/03/98 10:59 - [ 5] Visit: 01 Visit Priority: Visit Requirements: ORIENT 185D TO 225D 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 ------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD-00470 WFPC2 IMAGE WF3-FIX F702W 7020 ATD-GAIN = 7,CLOCKS = NO,CR-SPLIT 3 750 S 5+031957 = NO ------------------------------------------------------------------------------------------------------------------------------------ 6619( 8) - 11/03/98 10:59 - [ 6] Visit: 02 Visit Priority: Visit Requirements: ORIENT 0D TO 48D 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 ------------------------------------------------------------------------------------------------------------------------------------ 2 FIELD-01252 WFPC2 IMAGE WF3-FIX F702W 7020 ATD-GAIN = 7,CLOCKS = NO,CR-SPLIT 3 750 S 8-000555 = NO ------------------------------------------------------------------------------------------------------------------------------------ 6619( 8) - 11/03/98 10:59 - [ 7] Visit: 03 Visit Priority: Visit Requirements: ORIENT 270D TO 292D; SCHED 50% 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 ------------------------------------------------------------------------------------------------------------------------------------ 3 FIELD-04074 WFPC2 IMAGE WF3-FIX F702W 7020 ATD-GAIN = 7,CLOCKS = NO,CR-SPLIT 3 750 S 8-121136 = NO ------------------------------------------------------------------------------------------------------------------------------------ 6619( 8) - 11/03/98 10:59 - [ 8] Visit: 04 Visit Priority: Visit Requirements: ORIENT 248D TO 300D; SCHED 50% 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 ------------------------------------------------------------------------------------------------------------------------------------ 4 QSO-040748- WFPC2 IMAGE WF3-FIX F702W 7020 ATD-GAIN = 7,CLOCKS = NO,CR-SPLIT 3 750 S 121136 = NO ------------------------------------------------------------------------------------------------------------------------------------ 6619( 8) - 11/03/98 10:59 - [ 9] Visit: 05 Visit Priority: Visit Requirements: ORIENT 170D TO 183D; SCHED 60% 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 ------------------------------------------------------------------------------------------------------------------------------------ 5 FIELD-06354 WFPC2 IMAGE WF3-FIX F702W 7020 ATD-GAIN = 7,CLOCKS = NO,CR-SPLIT 3 750 S 6-751617 = NO ------------------------------------------------------------------------------------------------------------------------------------ 6619( 8) - 11/03/98 10:59 - [ 10] Visit: 06 Visit Priority: Visit Requirements: ORIENT 210D TO 274D 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 ------------------------------------------------------------------------------------------------------------------------------------ 6 FIELD-09063 WFPC2 IMAGE WF3-FIX F702W 7020 ATD-GAIN = 7,CLOCKS = NO,CR-SPLIT 3 750 S 1+164611 = NO ------------------------------------------------------------------------------------------------------------------------------------ 6619( 8) - 11/03/98 10:59 - [ 11] Visit: 07 Visit Priority: Visit Requirements: ORIENT 124D TO 186D 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 ------------------------------------------------------------------------------------------------------------------------------------ 7 FIELD-11391 WFPC2 IMAGE WF3-FIX F702W 7020 ATD-GAIN = 7,CLOCKS = NO,CR-SPLIT 3 750 S 0-135043 = NO ------------------------------------------------------------------------------------------------------------------------------------ 6619( 8) - 11/03/98 10:59 - [ 12] Visit: 08 Visit Priority: Visit Requirements: ORIENT 61D TO 112D 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 ------------------------------------------------------------------------------------------------------------------------------------ 8 QSO-121920+ WFPC2 IMAGE WF3-FIX F702W 7020 ATD-GAIN = 7,CLOCKS = NO,CR-SPLIT 3 700 S GS ACQ SCENARIO SINGLE 063840 = NO ------------------------------------------------------------------------------------------------------------------------------------ 6619( 8) - 11/03/98 10:59 - [ 13] Visit: 09 Visit Priority: Visit Requirements: ORIENT 175D TO 260D; SCHED 40% 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 ------------------------------------------------------------------------------------------------------------------------------------ 9 FIELD-12192 WFPC2 IMAGE WF3-FIX F702W 7020 ATD-GAIN = 7,CLOCKS = NO,CR-SPLIT 3 700 S 0+063840 = NO ------------------------------------------------------------------------------------------------------------------------------------ 6619( 8) - 11/03/98 10:59 - [ 14] Visit: 10 Visit Priority: Visit Requirements: ORIENT 315D TO 343D; SCHED 40% 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 QSO-130112+ WFPC2 IMAGE WF3-FIX F702W 7020 ATD-GAIN = 7,CLOCKS = NO,CR-SPLIT 3 750 S 590206 = NO ------------------------------------------------------------------------------------------------------------------------------------ 6619( 8) - 11/03/98 10:59 - [ 15] Visit: 11 Visit Priority: Visit Requirements: ORIENT 211D TO 270D; SCHED 40% 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 ------------------------------------------------------------------------------------------------------------------------------------ 11 FIELD-13011 WFPC2 IMAGE WF3-FIX F702W 7020 ATD-GAIN = 7,CLOCKS = NO,CR-SPLIT 3 750 S 2+590206 = NO ------------------------------------------------------------------------------------------------------------------------------------ 6619( 8) - 11/03/98 10:59 - [ 16] Visit: 12 Visit Priority: Visit Requirements: ORIENT 286D TO 315D 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 ------------------------------------------------------------------------------------------------------------------------------------ 12 FIELD-14273 WFPC2 IMAGE WF3-FIX F702W 7020 ATD-GAIN = 7,CLOCKS = NO,CR-SPLIT 3 750 S 8-120350 = NO ------------------------------------------------------------------------------------------------------------------------------------ 6619( 8) - 11/03/98 10:59 - [ 17] Visit: 13 Visit Priority: Visit Requirements: ORIENT 68D TO 87D; SCHED 50% 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 ------------------------------------------------------------------------------------------------------------------------------------ 13 FIELD-16425 WFPC2 IMAGE WF3-FIX F702W 7020 ATD-GAIN = 7,CLOCKS = NO,CR-SPLIT 3 750 S 8+394836 = NO ------------------------------------------------------------------------------------------------------------------------------------ 6619( 8) - 11/03/98 10:59 - [ 18] Visit: 14 Visit Priority: Visit Requirements: ORIENT 45D TO 135D 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 ------------------------------------------------------------------------------------------------------------------------------------ 14 FIELD-22535 WFPC2 IMAGE WF3-FIX F702W 7020 ATD-GAIN = 7,CLOCKS = NO,CR-SPLIT 3 750 S 7+160853 = NO ------------------------------------------------------------------------------------------------------------------------------------ 6619( 8) - 11/03/98 10:59 - [ 19] Summary Form for Proposal 6619 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WF3-FIX ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ATD-GAIN = 7 CLOCKS = NO CR-SPLIT = NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 185D TO 225D ORIENT 0D TO 48D ORIENT 270D TO 292D; SCHED 50% ORIENT 248D TO 300D; SCHED 50% ORIENT 170D TO 183D; SCHED 60% ORIENT 210D TO 274D ORIENT 124D TO 186D ORIENT 61D TO 112D GS ACQ SCENARIO SINGLE ORIENT 175D TO 260D; SCHED 40% ORIENT 315D TO 343D; SCHED 40% ORIENT 211D TO 270D; SCHED 40% ORIENT 286D TO 315D ORIENT 68D TO 87D; SCHED 50% ORIENT 45D TO 135D ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F702W ------------------------------------------------------------------------------------------------------------------------------------ Target Names FIELD-004705+031957 FIELD-012528-000555 FIELD-040748-121136 QSO-040748-121136 FIELD-063546-751617 FIELD-090631+164611 FIELD-113910-135043 QSO-121920+063840 FIELD-121920+063840 QSO-130112+590206 FIELD-130112+590206 FIELD-142738-120350 FIELD-164258+394836 FIELD-225357+160853 ------------------------------------------------------------------------------------------------------------------------------------ Wavelengths 7020 ------------------------------------------------------------------------------------------------------------------------------------