5947( 10) - 04/08/96 09:59 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 5947 Version: 10 Check-in Date: 08-Apr-1996 09:54:41 1.Proposal Title: The Relationship Between Galaxies and Lyman-Alpha Absorbers at Low Redshift ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle QSO Absorption Lines GO 5 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Chris Impey Steward Observatory CoI: Catherine Petry Steward Observatory N CoI: Kathleen Flint Steward Observatory N ------------------------------------------------------------------------------------ 6. Abstract The relationship between galaxies and low column density, metal poor quasar absorbers is still poorly understood. There is some evidence for two populations: strong Lyman-Alpha absorbers which are associated with luminous galaxies, and weak Lyman-Alpha absorbers that are uncorrelated with galaxies. Recent HST observations of the quasar pair, Q0107- 025 A,B, detect common Lyman-Alpha lines over a scale at least 500-750 h_50^-1 kpc, with an rms velocity difference of less than 100 km/s. This implies that Lyman-Alpha absorbers are larger and more quiescent than any current theoretical models predict. The physical properties of the absorbers can be most easily understood if they occupy low density, low velocity dispersion environments. In this respect, they are similar to low surface brightness galaxies, and they may represent a relatively unbiased tracer of the underlying mass distribution. We have selected 10 quasars in the Virgo region and beyond, where the 3-dimensional distribution of galaxies is extremely well mapped, and propose to observe them with GHRS to detect an estimated 40 Lyman-Alpha absorbers over the redshift range z = 0 to z = 0.1. There is no a priori selection in favor of quasars demonstrating a high density of absorbers. The results will be used to discriminate between different models of the clustering of the absorbers with respect to bright galaxies. ------------------------------------------------------------------------------------ 5947( 10) - 04/08/96 09:59 - [ 2] Observations Description ------------------------ Number of Lines: The proposed observations involve spectroscopy of 10 bright quasars with the GHRS using the Large Science Aperture and the G140L grating, giving a coverage of 1200-1480 Angstroms at a resolution of 0.57 Angstroms. For this wavelength range and resolution, GHRS is superior to FOS. This setup gives sensitivity to Lyman- Alpha lines over the redshift range z = 0 to z = 0.22, although the selection of lines below a redshift of 1000 km/s is difficult due to geocoronal Lyman-Alpha and the steep damping wings of Galactic Lyman-Alpha. Fortuitously, it also encompasses the short wavelength region where the COSTAR mirrors do not degrade the throughput of the GHRS. We adopted the following dependence for the density of Lyman-Alpha systems d^2N / (dz*dW) = (dN/dz)o / Wstar * (1+z)^Gamma * exp(-W/Wstar) and we adopt Gamma = 0.5, Wstar = 0.21 Angstroms, and (dN/dz)o = 17.0 from the maximum likelihood model of Bahcall et al. (1993). The addition of more recent data from the Quasar Key Project has not changed these numbers significantly (Weymann, private communication). The 4.5-sigma equivalent width limit is given by W_4.5-sigma = 9 * sqrt(Wline * d) / SNR where an unresolved line has Wline = 0.65 Angstroms, the width of a diode d = 0.57 Angstroms, and we assume unresolved lines (justified by the fact that Lyman-Alpha Doppler parameters are generally less than 100 km/s). In fact, we can usefully bin the data to 1 Angstrom resolution. Integration times are adjusted to give the expected number of Lyman-Alpha absorption lines (Nexp) to be greater than or equal to three over the range covered by ZCAT. Statistical Issues: The average value of Nexp per line of sight was set to yield about 40 Lyman- Alpha lines in the Virgo sample. The Poisson probability of detecting zero lines along a single line of sight is only 0.05, so on average we expect no more than one quasar spectrum to be lost from the analysis because it contains no Lyman-Alpha lines. A conservative detection threshold of 4.5-sigma was used. The line density will be low, and there are 500 resolution elements in the Digicon, so we are concerned with false detections of unresolved lines. Assuming normally distributed statistics, no lines at 4.5-sigma significance should be confused with noise fluctuations. We have originally selected targets according to the criterion Ngal >= (Nexp)^3, because the comparison between galaxies and absorbers involves the projection of the 3-dimensional galaxy distribution onto a 1-dimensional absorber redshift distribution. There are two objects that currently fall below this limit, however, we intend to supplement existing redshift catalogs with our own redshift survey, and greatly increase galaxy statistics for all objects. Finally, since most of the quasars do not have directly measured fluxes at 1300 Angstroms, there is the chance that an optically thick Lyman limit system will extinguish the UV continuum. This probability rises from about 20% in the integrated redshift range z = 0.5-1 to 50% in the redshift range z = 1-1.2 (Bahcall et al. 1993). Based on these numbers, there is less than a 50% chance of losing a single target to an unforeseen Lyman limit system. Bright Absorption Probes Object RA Dec z F(1300) SNR W_4.5s Nexp Ngal Orbits ----------- ---------- -------- ----- ---- ----- -- -- ---- --- - PG 1211+143 12 11 44.9 14 19 53 0.085 6.55 63.98 0.09 4.76 207 2 Q 1214+1804 12 14 16.8 18 04 44 0.375 0.50 29.27 0.19 3.48 76 5 MARK 1320 12 16 34.9 -01 31 50 0.103 0.42 26.30 0.21 3.14 21 5 PG 1216+069 12 16 47.8 06 55 17 0.334 2.44 38.41 0.14 4.30 267 2 PKS 1217+02 12 17 38.3 02 20 21 0.240 0.59 27.81 0.20 3.32 57 4 Q 1228+1116 12 28 22.0 11 16 45 0.235 0.82 32.80 0.17 3.83 394 4 Q 1230+0947 12 30 53.6 09 47 55 0.420 3.72 47.43 0.12 4.89 302 2 Q 1245- 0333 12 45 00.4 -03 33 47 0.379 1.95 43.21 0.13 4.64 20 3 PKS 1252+119 12 52 07.7 11 57 21 0.870 0.53 29.58 0.19 3.51 48 5 Q 1252+0200 12 52 46.4 02 00 27 0.345 3.55 46.34 0.12 4.83 28 2 Notes: F(1300) is in 1.0e-14 ergs/cm^2/s/Angstrom W_4.5s is in Angstroms Extrapolated UV flux using individual measured spectral index for all but PKS 1217+02 and Q 1214+1804 Target List: Targets were selected from the most current version of the Veron catalog (Veron-Cetty and Veron, "A Catalogue of Quasars and Active Galactic Nuclei", 6th ed., ESO Sci. Rep. 7 1993) to have Ngal > 27 within a cone of depth Delta-z = 0.1 (30,000 km/s) and half-angle 2 degrees There are two exceptions where Ngal > 20, and these quasars were chosen for their position in the southern extension of the Virgo region. Quasars are selected according to UV flux and redshift. Most are expected to have a 1300 Angstrom flux greater than 0.5e-14 erg/cm^2/s/A. Initially, the 1300 Angstrom flux was estimated by extrapolation from the V band flux (Lanzetta et al. 1991, Ap.J.Supp., 84, 109), using the average spectral index for the targets with published 1300 Angstrom spectral fluxes (Alpha = -0.71, S_Nu proportionate to Nu^Alpha). Because of the unreliability of the published V magnitudes and the large uncertainty in the average spectral index, we observed 8/10 targets spectrophotometrically to derive a spectral index for each object individually, and therefore estimating a more accurate 1300 Angstrom flux. Two targets were not observed spectrophotometrically, PKS 1217+02 and Q 1214+1804. PKS 1217+02 has a published UV spectrum (Lanzetta et al. 1991, ApJ Supp., 84, 109) which agrees with the estimated flux using the average spectral index. Q 1214+1804, which does not have a measured spectral index or a published UV spectrum, is an optically selected quasar and has a high probability of having a reliable extrapolated flux calculated from the average spectral index. The lower redshift bound is usually z = 0.1, although one object down to z = 0.08 has been included because the UV brightness offsets the increased amount of time required to detect 3 lines in a small redshift path length. The upper redshift bound is z = 0.9, to avoid the likelihood of Lyman limit absorption in quasars without previously measured UV fluxes. Since the quasars are faint, the most efficient strategy is to acquire the targets with the FOS and do a slew to the GHRS large science aperture. Time Justification: The range of integration times required to detect an average of 4 Lyman-Alpha lines varies from 60-170 minutes among the 10 targets, with an average of 110 minutes. To estimate the number of orbits required, we assumed overheads of 12 minutes for guide star acquisition, 6 minutes for guide star reaquisition, 11 minutes for each target acquisition, and 4 minutes per readout (assuming that multi-orbit integrations could be stored without readout). Where a multi-orbit exposure was required, the number of orbits chosen was that which resulted in Nexp greater than three. The 3 objects with number of orbits selected to Norbits = 1 were set to Norbits = 2, as this integral change in the number of orbits is the most efficient way to increase Nexp. The exposure time for 4 other objects was increased by one orbit, setting Nexp => 3.14 and the overall average at 4.07. No object has Norbits > 5. Two absorbers located near the southern Virgo extension have already been studied (Morris et al. 1993; Weymann et al. 1994, Ap.J., in press). The number of predicted absorbers at the Virgo redshift depends sensitively on assumptions about the population of low surface brightness galaxies in the Virgo cluster (Davies et al. 1987, Ast.Ap., 172, 500). The percentage of quasars with at least one Virgo absorber goes from 30% to 80% as the number of low surface brightness galaxies changes from 500 to 3000. Real Time Justification ----------------------- The proposed observations can address the scientific issues raised in the proposal. Redshifts exist in ZCAT (z < 0.1) for the fields around the target quasars, and optical spectra exist with which to identify contaminating metal lines in the UV spectra. Additionally, we plan to carry out supplementary galaxy redshift surveys for all quasar fields, to sample the galaxy distribution more fully and to a higher redshift. Thus, while the average Nexp is 4 from z = 0 to z = 0.1, we will have an average Nexp of 9 for the entire accessible redshift range of Delta z = 0.22 per quasar. By Poisson statistics, we therefore anticipate a few spectra with about 12 Lyman-Alpha lines. For those fields, we will use the MX multi-object spectrograph on the Steward 90- inch telescope to conduct redshift surveys of additional galaxies down to V = 19, probing to a larger redshift than is readily available in ZCAT. The increased sampling of the 3- dimensional galaxy distribution will give a more sensitive measure of correlation with the larger number of absorbers. Calibration Justification ------------------------- None. Additional Comments ------------------- ------------------------------------------------------------------------------------ 5947( 10) - 04/08/96 09:59 - [ 3] Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 5947( 10) - 04/08/96 09:59 - [ 4] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 01 PG-1211+143 Galaxy, QSO, Lyman RA = 12H 14M 17.68S +/- 0.1S, 2000 Z = V = 14.63+/-0.4 Alpha Cloud, Ext- DEC = +14D 03' 12.3" +/- 0.5", 0.085 F(1300)=6.55+/-0.7e-14 medium, Absorption Line PLATE-ID=01TJ System 02 Q-1214+1804 Galaxy, QSO, Lyman RA = 12H 16M 49.1S +/- 0.1S, DEC 2000 Z = V = 16.7+/-0.4 Alpha Cloud, Ext- = +17D 48' 4.4" +/- 0.5", PLATE- 0.375 F(1300)=0.50+/-0.05e-14 medium, Absorption Line ID=0590 System 03 MARK-1320 Galaxy, QSO, Lyman RA = 12H 19M 8.77S +/- 0.1S, DEC 2000 Z = V = 15.+/-0.4 Alpha Cloud, Ext- = -01D 48' 30.3" +/- 0.5", PLATE 0.103 F(1300)=0.42+/-0.04e-14 medium, Absorption Line -ID=00BB System 04 PG-1216+069 Galaxy, QSO, Lyman RA = 12H 19M 21.01S +/- 0.1S, 2000 Z = V = 15.75+/-0.4 Alpha Cloud, Ext- DEC = +06D 38' 38" +/- 0.5", 0.334 F(1300)=2.44+/-0.2e-14 medium, Absorption Line PLATE-ID=01UQ System 05 PKS-1217+02 Galaxy, QSO, Lyman RA = 12H 20M 11.85S +/- 0.1S, 2000 Z = V = 16.53+/-0.4 Alpha Cloud, Ext- DEC = +02D 03' 42.4" +/- 0.5", 0.240 F(1300)=0.59+/-0.06e-14 medium, Absorption Line PLATE-ID=00BB System 06 Q-1228+1116 Galaxy, QSO, Lyman RA = 12H 30M 54.13S +/- 0.1S, 2000 Z = V = 17.10+/-0.4 Alpha Cloud, Ext- DEC = +11D 00' 11.2" +/- 0.5", 0.235 F(1300)=0.82+/-0.08e-14 medium, Absorption Line PLATE-ID=00IY System 07 Q-1230+0947 Galaxy, QSO, Lyman RA = 12H 33M 25.79S +/- 0.1S, 2000 Z = V = 16.4+/-0.4 Alpha Cloud, Ext- DEC = +09D 31' 23.1" +/- 0.5", 0.420 F(1300)=3.72+/-0.4e-14 medium, Absorption Line PLATE-ID=00IY System 08 Q-1245-0333 Galaxy, QSO, Lyman RA = 12H 47M 35.030S +/- 0.1S, 2000 Z = V = 15.75+/-0.4 Alpha Cloud, Ext- DEC = -03D 50' 8.60" +/- 0.5", 0.379 F(1300)=1.95+/-0.2e-14 medium, Absorption Line PLATE-ID=024P System 09 PKS-1252+11 Galaxy, QSO, Lyman RA = 12H 54M 38.24S +/- 0.1S, 2000 Z = V = 16.64+/-0.4 Alpha Cloud, Ext- DEC = +11D 41' 6.1" +/- 0.5", 0.870 F(1300)=0.53+/-0.05e-14 medium, Absorption Line PLATE-ID=01TH System 10 Q-1252+0200 Galaxy, QSO, Lyman RA = 12H 55M 19.73S +/- 0.1S, 2000 Z = V = 15.48+/-0.4 Alpha Cloud, Ext- DEC = +01D 44' 11.06" +/- 0.5", 0.345 F(1300)=3.55+/-0.4e-14 medium, Absorption Line PLATE-ID=00WW System 5947( 10) - 04/08/96 09:59 - [ 5] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: FOS acquisition, HRS observation. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PG-1211+143 FOS/BL ACQ/BIN 4.3 MIRROR 1 2.8S ONBOARD ACQ FOR 2 ARY ------------------------------------------------------------------------------------------------------------------------------------ 2 PG-1211+143 HRS ACCUM 2.0 G140L 1200- FP- 2 1414.4S 1480 SPLIT=STD,STEP- PATT=DEF ------------------------------------------------------------------------------------------------------------------------------------ 3 PG-1211+143 HRS ACCUM 2.0 G140L 1200- FP- 1 1523.2S 1480 SPLIT=STD,STEP- PATT=DEF Comments: Expose for 2 orbits (62M); ------------------------------------------------------------------------------------------------------------------------------------ 5947( 10) - 04/08/96 09:59 - [ 6] Visit: 02 Visit Requirements: On Hold Comments: Additional Comments: FOS acquisition, HRS observation. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 Q-1214+1804 FOS/BL ACQ/BIN 4.3 MIRROR 1 26S ONBOARD ACQ FOR 2 ARY ------------------------------------------------------------------------------------------------------------------------------------ 2 Q-1214+1804 HRS ACCUM 2.0 G140L 1200- FP- 7 1523.2S 1480 SPLIT=STD,STEP- PATT=DEF ------------------------------------------------------------------------------------------------------------------------------------ 3 Q-1214+1804 HRS ACCUM 2.0 G140L 1200- FP- 1 1958.4S 1480 SPLIT=STD,STEP- PATT=DEF Comments: Expose for 5 orbits (170M); ------------------------------------------------------------------------------------------------------------------------------------ 5947( 10) - 04/08/96 09:59 - [ 7] Visit: 03 Visit Requirements: On Hold Comments: Additional Comments: FOS acquisition, HRS observation. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 MARK-1320 FOS/BL ACQ/BIN 4.3 MIRROR 1 12.0S ONBOARD ACQ FOR 2 ARY ------------------------------------------------------------------------------------------------------------------------------------ 2 MARK-1320 HRS ACCUM 2.0 G140L 1200- FP- 7 1523.2S 1480 SPLIT=STD,STEP- PATT=DEF ------------------------------------------------------------------------------------------------------------------------------------ 3 MARK-1320 HRS ACCUM 2.0 G140L 1200- FP- 1 1958.4S 1480 SPLIT=STD,STEP- PATT=DEF Comments: Expose for 5 orbit (165M); ------------------------------------------------------------------------------------------------------------------------------------ 5947( 10) - 04/08/96 09:59 - [ 8] Visit: 04 Visit Requirements: On Hold Comments: Additional Comments: FOS acquisition, HRS observation. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PG-1216+069 FOS/BL ACQ/BIN 4.3 MIRROR 1 7.7S ONBOARD ACQ FOR 2 ARY ------------------------------------------------------------------------------------------------------------------------------------ 2 PG-1216+069 HRS ACCUM 2.0 G140L 1200- FP- 2 1414.4S 1480 SPLIT=STD,STEP- PATT=DEF ------------------------------------------------------------------------------------------------------------------------------------ 3 PG-1216+069 HRS ACCUM 2.0 G140L 1200- FP- 1 1523.2S 1480 SPLIT=STD,STEP- PATT=DEF Comments: Expose for 2 orbits (60M); ------------------------------------------------------------------------------------------------------------------------------------ 5947( 10) - 04/08/96 09:59 - [ 9] Visit: 05 Visit Requirements: On Hold Comments: Additional Comments: FOS acquisition, HRS observation. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PKS-1217+02 FOS/BL ACQ/BIN 4.3 MIRROR 1 22S ONBOARD ACQ FOR 2 ARY ------------------------------------------------------------------------------------------------------------------------------------ 2 PKS-1217+02 HRS ACCUM 2.0 G140L 1200- FP- 6 1632.0S 1480 SPLIT=STD,STEP- PATT=DEF Comments: Expose for 4 orbits (130M); ------------------------------------------------------------------------------------------------------------------------------------ 5947( 10) - 04/08/96 09:59 - [ 10] Visit: 06 Visit Requirements: On Hold Comments: Additional Comments: FOS acquisition, HRS observation. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 Q-1228+1116 FOS/BL ACQ/BIN 4.3 MIRROR 1 25S ONBOARD ACQ FOR 2 ARY ------------------------------------------------------------------------------------------------------------------------------------ 2 Q-1228+1116 HRS ACCUM 2.0 G140L 1200- FP- 6 1632.0S 1480 SPLIT=STD,STEP- PATT=DEF Comments: Expose for 4 orbits (130M); ------------------------------------------------------------------------------------------------------------------------------------ 5947( 10) - 04/08/96 09:59 - [ 11] Visit: 07 Visit Requirements: On Hold Comments: Additional Comments: FOS acquisition, HRS observation. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 Q-1230+0947 FOS/BL ACQ/BIN 4.3 MIRROR 1 8.3S ONBOARD ACQ FOR 2 ARY ------------------------------------------------------------------------------------------------------------------------------------ 2 Q-1230+0947 HRS ACCUM 2.0 G140L 1200- FP- 2 1414.4S 1480 SPLIT=STD,STEP- PATT=DEF ------------------------------------------------------------------------------------------------------------------------------------ 3 Q-1230+0947 HRS ACCUM 2.0 G140L 1200- FP- 1 1523.2S 1480 SPLIT=STD,STEP- PATT=DEF Comments: Expose for 2 orbits (60M); ------------------------------------------------------------------------------------------------------------------------------------ 5947( 10) - 04/08/96 09:59 - [ 12] Visit: 08 Visit Requirements: On Hold Comments: Additional Comments: FOS acquisition, HRS observation. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 Q-1245-0333 FOS/BL ACQ/BIN 4.3 MIRROR 1 8.6S ONBOARD ACQ FOR 2 ARY ------------------------------------------------------------------------------------------------------------------------------------ 2 Q-1245-0333 HRS ACCUM 2.0 G140L 1200- FP- 4 1740.8S 1480 SPLIT=STD,STEP- PATT=DEF Comments: Expose for 3 orbits (95M); ------------------------------------------------------------------------------------------------------------------------------------ 5947( 10) - 04/08/96 09:59 - [ 13] Visit: 09 Visit Requirements: On Hold Comments: Additional Comments: FOS acquisition, HRS observation. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PKS-1252+11 FOS/BL ACQ/BIN 4.3 MIRROR 1 25S ONBOARD ACQ FOR 2 ARY ------------------------------------------------------------------------------------------------------------------------------------ 2 PKS-1252+11 HRS ACCUM 2.0 G140L 1200- FP- 7 1523.2S 1480 SPLIT=STD,STEP- PATT=DEF ------------------------------------------------------------------------------------------------------------------------------------ 3 PKS-1252+11 HRS ACCUM 2.0 G140L 1200- FP- 1 1958.4S 1480 SPLIT=STD,STEP- PATT=DEF Comments: Expose for 5 orbits (165M); ------------------------------------------------------------------------------------------------------------------------------------ 5947( 10) - 04/08/96 09:59 - [ 14] Visit: 10 Visit Requirements: On Hold Comments: Additional Comments: FOS acquisition, HRS observation. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 Q-1252+0200 FOS/BL ACQ/BIN 4.3 MIRROR 1 5.6S ONBOARD ACQ FOR 2 ARY ------------------------------------------------------------------------------------------------------------------------------------ 2 Q-1252+0200 HRS ACCUM 2.0 G140L 1200- FP- 2 1414.4S 1480 SPLIT=STD,STEP- PATT=DEF ------------------------------------------------------------------------------------------------------------------------------------ 3 Q-1252+0200 HRS ACCUM 2.0 G140L 1200- FP- 1 1523.2S 1480 SPLIT=STD,STEP- PATT=DEF Comments: Expose for 2 orbits (60M); ------------------------------------------------------------------------------------------------------------------------------------ 5947( 10) - 04/08/96 09:59 - [ 15] Summary Form for Proposal 5947 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/BL HRS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/BINARY ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FP-SPLIT=STD STEP-PATT=DEF ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category QSO Absorption Lines ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ONBOARD ACQ FOR 2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G140L ------------------------------------------------------------------------------------------------------------------------------------ Target Names PG-1211+143 Q-1214+1804 MARK-1320 PG-1216+069 PKS-1217+02 Q-1228+1116 Q-1230+0947 Q-1245-0333 PKS-1252+11 Q-1252+0200 ------------------------------------------------------------------------------------------------------------------------------------