5852( 10) - 01/11/96 08:23 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 5852 Version: 10 Check-in Date: 11-Jan-1996 08:08:48 1.Proposal Title: LyAlpha Forest Cloud Sizes and Clustering at z ~ 0.5 from a Grouping of Five QSOs on the Sky ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle Quasars GO 5 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: David Turnshek Dept. of Physics & Astronomy, University of Pittsburgh CoI: Cyril Hazard Dept. of Physics & Astronomy, University N of Pittsburgh ------------------------------------------------------------------------------------ 6. Abstract We propose HST-FOS-G190H observations of a grouping of five QSOs on the sky. The fact that there are five QSOs means that there are 10 pairings, and the pairs have the following separations in arcmin: 0.9, 1.4, 1.6, 2.1, 2.6, 3.2, 4.7, 6.6, 7.0, and 7.9. The G190H observations will cover the redshift interval z ~ 0.25 -- 0.88. The sizes subtended by the observations will range from ~ 130h^-1 kpc (for the 0.9 arcmin pair at z = 0.25) to ~ 2h^-1 Mpc (for the 7.9 arcmin pair at z = 0.88). Common LyAlpha absorption lines have been seen in spectra of pairs of QSOs at higher redshift (z ~ 2) for separations of ~ 50h^-1 kpc and have been found to correlate with each other at small velocity separations (Deltav < 500 kms) for separations as large as ~ 400h^-1 kpc. At the largest length scales we propose to study, some common metal-line absorption has been reported in spectra of QSO pairs at high redshift and clusters/superclusters of galaxies have these characteristic lengths at low redshift. More recently, results from the HST Quasar Absorption Line Key Project show evidence for some clustering of LyAlpha lines with velocity dispersions of ~ 600 to 1400 kms \ which, if interpreted as a Hubble flow, correspond to dimensions of ~ 4 to 9 Mpc. For S/N ~ 30 we estimate that ~ 27 relatively strong 5-Sigma significance LyAlpha lines with rest equivalent widths > 0.17 Angstrom \ will be detected in each spectrum. These observations can uniquely explore the LyAlpha forest cloud sizes, characteristic clustering lengths, and region shapes at z ~ 0.25 -- 0.88. ------------------------------------------------------------------------------------ 5852( 10) - 01/11/96 08:23 - [ 2] Observations Description ------------------------ -0.15 truein We will obtain HST-FOS-G190H observations of a grouping of five QSOs which all lie within a 4 arcmin radius circle on the sky. The QSOs range in brightness from B=17.6 to B=18.6 and will require 3 to 5 orbits to obtain G190H spectra with S/N ~ 30. Real Time Justification ----------------------- -0.15 truein None. -0.15 truein None. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 5852( 10) - 01/11/96 08:23 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 1146+111B GALAXY,QSO RA=11H 48M 44.260S +/- 0.07S, 2000 Z = 1.01 V = 18.65+/-0.03 DEC=10D 47' 56.90" +/- 0.5", PLATE-ID=01TN Comments: Assuming power law spectrum, alpha=1.0. This is object 'a' in Hazard et al., Nature 1979. 2 1146+111E GALAXY,QSO RA=11H 48M 42.05S +/- 0.07S, 2000 Z = 1.10 V = 18.34+/-0.03 DEC=10D 47' 9.00" +/- 0.5", PLATE-ID=01TN Comments: Assuming power law spectrum, alpha=1.0. This is object 'b' in Hazard et al., Nature 1979. 3 1146+111C GALAXY,QSO RA=11H 48M 39.40S +/- 0.07S, 2000 Z = 1.01 V = 18.63+/-0.03 DEC=10D 50' 16.7" +/- 0.5", PLATE-ID=01TN Comments: Assuming power law spectrum, alpha=1.0. This is object 'c' in Hazard et al., Nature 1979. 4 1146+111D GALAXY,QSO RA=11H 48M 51.34S +/- 0.07S, 2000 Z = 2.12 V = 17.69+/-0.03 DEC=10D 48' 24.4" +/- 0.5", PLATE-ID=01TN Comments: Assuming power law spectrum, alpha=1.5. This is object 'd' in Hazard et al., Nature 1979. 5 MC1146+111 GALAXY,QUASAR RA=11H 46M 13.42S +/- 0.07S, 1950 Z = 0.86 V = 18.14+/-0.03 DEC=11D 11' 39.9" +/- 1.0" Comments: Assuming power law spectrum, alpha=1.0. This is object 'e' in Hazard et al., Nature 1979. 6 F1146+11-1 GALAXY,QSO RA=11H 46M +/- 1M, DEC=11D 12' 1950 Z = 1.01 +/- 1.0" Comments: Parallel target for visit 1 7 F1146+11-2 GALAXY,QSO RA=11H 46M +/- 1M, DEC=11D 12' 1950 Z = 1.01 +/- 1.0" Comments: Parallel target for visit 2 8 F1146+11-3 GALAXY,QSO RA=11H 46M +/- 1M, DEC=11D 15' 1950 Z = 1.01 +/- 1.0" Comments: Parallel target for visit 3 9 F1146+11-4 GALAXY,QSO RA=11H 46M +/- 1M, DEC=11D 13' 1950 Z = 1.01 +/- 1.0" Comments: Parallel target for visit 4 10 F1146+11-5 GALAXY,QSO RA=11H 46M +/- 1M, DEC=11D 03' 1950 Z = 1.01 +/- 1.0" Comments: Parallel target for visit 5 5852( 10) - 01/11/96 08:23 - [ 4] Visit: 01 Visit Requirements: ORIENT 236D TO 246D 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 ------------------------------------------------------------------------------------------------------------------------------------ 111 1146+111B FOS/RD ACQ/BIN 4.3 MIRROR 1 56S ONBOARD ACQ FOR 112; ARY ------------------------------------------------------------------------------------------------------------------------------------ 112 1146+111B FOS/RD ACQ/PEA 0.25X2. MIRROR SCAN-STEP- 1 33S ONBOARD ACQ FOR 113,115,117,119,121,123 K 0 X=0.057,SEARCH- SIZE-X=9,SEARCH -SIZE-Y=1 ------------------------------------------------------------------------------------------------------------------------------------ 113 1146+111B FOS/RD ACCUM 0.25X2. G190H 1590- 1 750S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 114 F1146+11-1 WFPC2 IMAGE WFALL F606W CR-SPLIT=NO 1 735S PAR WITH 113 ------------------------------------------------------------------------------------------------------------------------------------ 115 1146+111B FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 116 F1146+11-1 WFPC2 IMAGE WFALL F606W CR-SPLIT=NO 1 2340S PAR WITH 115 ------------------------------------------------------------------------------------------------------------------------------------ 117 1146+111B FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 118 F1146+11-1 WFPC2 IMAGE WFALL F606W CR-SPLIT=NO 1 2340S PAR WITH 117 ------------------------------------------------------------------------------------------------------------------------------------ 119 1146+111B FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 120 F1146+11-1 WFPC2 IMAGE WFALL F814W CR-SPLIT=NO 1 2340S PAR WITH 119 ------------------------------------------------------------------------------------------------------------------------------------ 121 1146+111B FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 122 F1146+11-1 WFPC2 IMAGE WFALL F814W CR-SPLIT=NO 1 2340S PAR WITH 121 ------------------------------------------------------------------------------------------------------------------------------------ 123 1146+111B FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 124 F1146+11-1 WFPC2 IMAGE WFALL F814W CR-SPLIT=NO 1 2340S PAR WITH 123 ------------------------------------------------------------------------------------------------------------------------------------ 125 WAVE FOS/RD ACCUM 0.25X2. G190H 1 DEF 0 ------------------------------------------------------------------------------------------------------------------------------------ 5852( 10) - 01/11/96 08:23 - [ 5] Visit: 02 Visit Requirements: ORIENT 238D to 245D 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 ------------------------------------------------------------------------------------------------------------------------------------ 211 1146+111E FOS/RD ACQ/BIN 4.3 MIRROR 1 43S ONBOARD ACQ FOR 212; ARY ------------------------------------------------------------------------------------------------------------------------------------ 212 1146+111E FOS/RD ACQ/PEA 0.25X2. MIRROR SCAN-STEP- 1 25S ONBOARD ACQ FOR 213,215,217,219,221 K 0 X=0.057,SEARCH- SIZE-X=9,SEARCH -SIZE-Y=1 ------------------------------------------------------------------------------------------------------------------------------------ 213 1146+111E FOS/RD ACCUM 0.25X2. G190H 1590- 1 780S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 214 F1146+11-2 WFPC2 IMAGE WFALL F814W CR-SPLIT=NO 1 765S PAR WITH 213 ------------------------------------------------------------------------------------------------------------------------------------ 215 1146+111E FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 216 F1146+11-2 WFPC2 IMAGE WFALL F814W CR-SPLIT=NO 1 2340S PAR WITH 215 ------------------------------------------------------------------------------------------------------------------------------------ 217 1146+111E FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 218 F1146+11-2 WFPC2 IMAGE WFALL F814W CR-SPLIT=NO 1 2340S PAR WITH 217 ------------------------------------------------------------------------------------------------------------------------------------ 219 1146+111E FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 220 F1146+11-2 WFPC2 IMAGE WFALL F606W CR-SPLIT=NO 1 2340S PAR WITH 219 ------------------------------------------------------------------------------------------------------------------------------------ 221 1146+111E FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 222 F1146+11-2 WFPC2 IMAGE WFALL F606W CR-SPLIT=NO 1 2340S PAR WITH 221 ------------------------------------------------------------------------------------------------------------------------------------ 223 WAVE FOS/RD ACCUM 0.25X2. G190H 1 DEF 0 ------------------------------------------------------------------------------------------------------------------------------------ 5852( 10) - 01/11/96 08:23 - [ 6] Visit: 03 Visit Requirements: ORIENT 246D to 252D 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 ------------------------------------------------------------------------------------------------------------------------------------ 311 1146+111C FOS/RD ACQ/BIN 4.3 MIRROR 1 55S ONBOARD ACQ FOR 312; ARY ------------------------------------------------------------------------------------------------------------------------------------ 312 1146+111C FOS/RD ACQ/PEA 0.25X2. MIRROR SCAN-STEP- 1 33S ONBOARD ACQ FOR 313,315,317,319,321,323 K 0 X=0.057,SEARCH- SIZE-X=9,SEARCH -SIZE-Y=1 ------------------------------------------------------------------------------------------------------------------------------------ 313 1146+111C FOS/RD ACCUM 0.25X2. G190H 1590- 1 700S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 314 F1146+11-3 WFPC2 IMAGE WFALL F606W CR-SPLIT=NO 1 685S PAR WITH 313 ------------------------------------------------------------------------------------------------------------------------------------ 315 1146+111C FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 316 F1146+11-3 WFPC2 IMAGE WFALL F606W CR-SPLIT=NO 1 2340S PAR WITH 315 ------------------------------------------------------------------------------------------------------------------------------------ 317 1146+111C FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 318 F1146+11-3 WFPC2 IMAGE WFALL F606W CR-SPLIT=NO 1 2340S PAR WITH 317 ------------------------------------------------------------------------------------------------------------------------------------ 319 1146+111C FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 320 F1146+11-3 WFPC2 IMAGE WFALL F814W CR-SPLIT=NO 1 2340S PAR WITH 319 ------------------------------------------------------------------------------------------------------------------------------------ 321 1146+111C FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 322 F1146+11-3 WFPC2 IMAGE WFALL F814W CR-SPLIT=NO 1 2340S PAR WITH 321 ------------------------------------------------------------------------------------------------------------------------------------ 323 1146+111C FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 324 F1146+11-3 WFPC2 IMAGE WFALL F814W CR-SPLIT=NO 1 2340S PAR WITH 323 ------------------------------------------------------------------------------------------------------------------------------------ 325 WAVE FOS/RD ACCUM 0.25X2. G190H 1 DEF 0 ------------------------------------------------------------------------------------------------------------------------------------ 5852( 10) - 01/11/96 08:23 - [ 7] Visit: 04 Visit Requirements: ORIENT 222D TO 250D 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 ------------------------------------------------------------------------------------------------------------------------------------ 411 1146+111D FOS/RD ACQ/BIN 4.3 MIRROR 1 28S ONBOARD ACQ FOR 412; ARY ------------------------------------------------------------------------------------------------------------------------------------ 412 1146+111D FOS/RD ACQ/PEA 0.25X2. MIRROR SCAN-STEP- 1 21S ONBOARD ACQ FOR 413,415,417,419 K 0 X=0.057,SEARCH- SIZE-X=9,SEARCH -SIZE-Y=1 ------------------------------------------------------------------------------------------------------------------------------------ 413 1146+111D FOS/RD ACCUM 0.25X2. G190H 1590- 1 850S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 414 F1146+11-4 WFPC2 IMAGE WFALL F606W CR-SPLIT=NO 1 835S PAR WITH 413 ------------------------------------------------------------------------------------------------------------------------------------ 415 1146+111D FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 416 F1146+11-4 WFPC2 IMAGE WFALL F606W CR-SPLIT=NO 1 2340S PAR WITH 415 ------------------------------------------------------------------------------------------------------------------------------------ 417 1146+111D FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 418 F1146+11-4 WFPC2 IMAGE WFALL F814W CR-SPLIT=NO 1 2340S PAR WITH 417 ------------------------------------------------------------------------------------------------------------------------------------ 419 1146+111D FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 420 F1146+11-4 WFPC2 IMAGE WFALL F814W CR-SPLIT=NO 1 2340S PAR WITH 419 ------------------------------------------------------------------------------------------------------------------------------------ 421 WAVE FOS/RD ACCUM 0.25X2. G190H 1 DEF 0 ------------------------------------------------------------------------------------------------------------------------------------ 5852( 10) - 01/11/96 08:23 - [ 8] Visit: 05 Visit Requirements: ORIENT 90D TO 110D 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 ------------------------------------------------------------------------------------------------------------------------------------ 51 MC1146+111 FOS/RD ACQ/BIN 4.3 MIRROR 1 28S ONBOARD ACQ FOR 52; ARY ------------------------------------------------------------------------------------------------------------------------------------ 52 MC1146+111 FOS/RD ACQ/PEA 0.25X2. G190H 1590- SCAN-STEP- 1 21S ONBOARD ACQ FOR 53,55,57,59 K 0 2312 X=0.057,SEARCH- SIZE-X=9,SEARCH -SIZE-Y=1 ------------------------------------------------------------------------------------------------------------------------------------ 53 MC1146+111 FOS/RD ACCUM 0.25X2. G190H 1590- 1 615S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 54 F1146+11-5 WFPC2 IMAGE WFALL F814W CR-SPLIT=NO 1 600S PAR WITH 53 ------------------------------------------------------------------------------------------------------------------------------------ 55 MC1146+111 FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 56 F1146+11-5 WFPC2 IMAGE WFALL F814W CR-SPLIT=NO 1 2340S PAR WITH 55 ------------------------------------------------------------------------------------------------------------------------------------ 57 MC1146+111 FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 58 F1146+11-5 WFPC2 IMAGE WFALL F606W CR-SPLIT=NO 1 2340S PAR WITH 57 ------------------------------------------------------------------------------------------------------------------------------------ 59 MC1146+111 FOS/RD ACCUM 0.25X2. G190H 1590- 1 2350S 0 2312 ------------------------------------------------------------------------------------------------------------------------------------ 60 F1146+11-5 WFPC2 IMAGE WFALL F606W CR-SPLIT=NO 1 2340S PAR WITH 59 ------------------------------------------------------------------------------------------------------------------------------------ 61 WAVE FOS/RD ACCUM 0.25X2. G190H 1900 1 DEF 0 ------------------------------------------------------------------------------------------------------------------------------------ 5852( 10) - 01/11/96 08:23 - [ 9] Summary Form for Proposal 5852 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/RD WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/BINARY ACQ/PEAK ACCUM IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SCAN-STEP-X=0.057 SEARCH-SIZE-X=9 SEARCH-SIZE-Y=1 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category Quasars ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 236D TO 246D SCHED 40% ONBOARD ACQ FOR 112; ONBOARD ACQ FOR 113,115,117,119,121,123 PAR WITH 113 PAR WITH 115 PAR WITH 117 PAR WITH 119 PAR WITH 121 PAR WITH 123 ORIENT 238D to 245D SCHED 40% ONBOARD ACQ FOR 212; ONBOARD ACQ FOR 213,215,217,219,221 PAR WITH 213 PAR WITH 215 PAR WITH 217 PAR WITH 219 PAR WITH 221 ORIENT 246D to 252D SCHED 40% ONBOARD ACQ FOR 312; ONBOARD ACQ FOR 313,315,317,319,321,323 PAR WITH 313 PAR WITH 315 PAR WITH 317 PAR WITH 319 PAR WITH 321 PAR WITH 323 ORIENT 222D TO 250D SCHED 40% ONBOARD ACQ FOR 412; ONBOARD ACQ FOR 413,415,417,419 PAR WITH 413 PAR WITH 415 PAR WITH 417 PAR WITH 419 ORIENT 90D TO 110D ONBOARD ACQ FOR 52; ONBOARD ACQ FOR 53,55,57,59 PAR WITH 53 PAR WITH 55 PAR WITH 57 PAR WITH 59 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G190H F606W F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names 1146+111B F1146+11-1 WAVE 1146+111E F1146+11-2 1146+111C F1146+11-3 1146+111D F1146+11-4 MC1146+111 F1146+11-5 ------------------------------------------------------------------------------------------------------------------------------------