! Proposal 6557, submission 1 ! PI: Charles Steidel ! Received Wed Feb 21 11:53:46 EST 1996 ! From: ccs@astro.caltech.edu ! Hubble Space Telescope Cycle 6 (1996) Phase II Proposal Template ! $Id: 6557,v 5.1 1996/03/14 19:56:38 pepsa Exp $ ! Hubble Space Telescope Cycle 6 (1996) Phase II Proposal Template ! $Id: 6557,v 5.1 1996/03/14 19:56:38 pepsa Exp $ ! ! Refer to the HST Phase II Proposal Instructions to fill this out ! ! Anything after a "!" is ignored, and may be deleted ! ! All keywords with multiple entries are comma delimited except the ! Visit_Requirements and Special_Requirements keywords which can be ! delimited with carriage returns or semi-colons, but not commas ! ! For help call your Program Coordinator: van Orsow ! Phone: 410-338-4568 , E-mail: vanorsow@stsci.edu ! ! This partially completed template was generated from a Phase I proposal. ! Name of Phase I Proposal: archive-0416.steidel.prop ! Date generated: Fri Dec 22 18:52:41 EST 1995 ! Proposal_Information ! Section 4 Title: WFPC2 Imaging of Intermediate Redshift Absorption-Selected Galaxies Proposal_Category: GO Scientific_Category: QSO ABSORPTION LINES Cycle: 6 Investigators PI_name: Charles Steidel PI_Institution: California Institute of Technology CoI_Name: Mark Dickinson CoI_Institution: Space Telescope Science Institute Contact: ! Y or N (designate at most one contact) CoI_Name: Kurt Adelberger CoI_Institution: California Institute of Technology Contact: ! Y or N (designate at most one contact) Abstract: ! Free format text (please update) We propose to continue using WFPC2 to obtain high resolution images of 0.3 <= z <= 1.0 galaxies taken from a survey selected by diffuse gas cross-section rather than apparent magnitude. The implications of our survey are that large, roughly spherical gaseous halos are a generic property of all relatively massive (L_K > 0.05L_K^* )galaxies, and that the nature of these envelopes is more closely related to galaxy mass than to current star formation rate or spectroscopic type. The aim of our proposed observations is to use a representative subset of our sample in order 1) to test directly whether the absorbers represent the full range in normal Hubble sequence morphological types (as suggested by the ground--based spectra and colors) 2) to confirm whether the statistical inference of roughly spherical gas distributions is correct by examining whether, e.g., galaxy inclination angle is related to the nature of the absorption, 3) to verify that the galaxies identified as the absorbers are indeed the most likely candidates by searching for previously undetected faint companions very near the QSO line of sight, and 4) to obtain crucial morphological and sky--orientation information that can be combined with our existing ground-- based data and with planned high resolution spectroscopy of the background QSOs to obtain a complete picture of the interrelationship between morphological type, impact parameter, star formation rate, and the gas--phase geometry, kinematics, physical conditions, and chemical abundances. Questions ! Free format text (please update) Observing_Description: For reasons stated in the justification, we will use the filter F702W for all of the observations. The apparent AB magnitudes of the galaxies of interest, at the wavelength of F702W, range from 19.7 to 24.0. We are using the same observational strategy (which has proved successful) adopted in our Cycle 5 program with the same scientific aims. The QSOs in each field range in magnitude from 16.5 to 19.5; these will saturate the CCD in a typical individual exposure of ~1200 seconds, and produce moderate blooming (several pixels) on the WFC CCDs; however, the typical galaxy separation from the QSO is ~4 arcsec, so that this will not adversely affect the objects of interest. Nevertheless, it will in some cases be important to have a well-defined PSF with which to model the QSO light profile, so we have planned to place the QSO in the same position (WF3-FIX) for each of the 12 fields; absolute ORIENT ranges have been specified which guarantee that objects of primary interest will not fall beneath diffraction spikes from the QSO, and so as to place absorbing galaxies evenly throughout the 4 azimuthal ``quadrants'' of the PSF. This will allow us to produce a very good PSF at exactly the position of interest on the chip, using all of the observations together. We have chosen not to use the PC because of the substantial penalty in read noise and the larger amount of scattered light in the PSF wings. Our general approach for each field is to obtain 2 separate CR-split exposures (typical integration of 1200-1300s per actual read--out), with the second one being at a position dithered by a fractional pixel (+ an integer number of pixels) relative to the first, thereby allowing us to achieve slightly better sampling of the data. There is a total of 15 absorbing galaxies in the 12 fields proposed; these have been carefully selected to span the full range in absolute magnitude, impact parameter, and spectroscopic type from our ground--based survey. A reasonably large number of fields is required in order to make general statements about the nature of the galaxy halos as a function of other observed galaxy properties. As stated below, these images will also complement a comprehensive extension of our ground--based survey to include wider-ranging multi--object faint galaxy spectroscopy and high--resolution QSO spectroscopy in the same fields. Real_Time_Justification: Calibration_Justification: ! Move appropriate text from Real_Time_Justification Additional_Comments: Fixed_Targets ! Section 5.1 Target_Number:1 Target_Name:Q0058-FIELD Alternate_Names: Description:GALAXY Position:RA=01H 00M 54.1S +/- 0.1S, DEC=02D 11' 37.0" +/- 1" ! PLATE-ID=0000 Equinox:J2000 RV_or_Z:z=0.613 Flux:R=23.3 Comments:High redshift galaxy producing absorption in the spectrum of the background QSO. Target_Number:2 Target_Name:Q0150-FIELD Alternate_Names: Description:GALAXY Position:RA=01H 52M 27.3S +/- 0.1S, DEC=-20D 01' 07.3" +/- 1" ! PLATE-ID=0000 Equinox:J2000 RV_or_Z:z=0.780 Flux:R=22.3 Comments:High redshift galaxy producing absorption in the spectrum of the background QSO. Target_Number:3 Target_Name:Q0229-FIELD Alternate_Names: Description:GALAXY Position:RA=02H 31M 46.0S +/- 0.1S, DEC=13D 22' 54.6" +/- 1" ! PLATE-ID=0000 Equinox:J2000 RV_or_Z:z=0.417 Flux:R=20.21 Comments:High redshift galaxy producing absorption in the spectrum of the background QSO. Target_Number:4 Target_Name:Q0836-FIELD Alternate_Names: Description:GALAXY Position:RA=08H 39M 33.0S +/- 0.1S, DEC=11D 12' 08.43" +/- 1" ! PLATE-ID=0000 Equinox:J2000 RV_or_Z:z=0.787 Flux:R=22.71 Comments:High redshift galaxy producing absorption in the spectrum of the background QSO. Target_Number:5 Target_Name:Q0843-FIELD Alternate_Names: Description:GALAXY Position:RA=08H 45M 47.3S +/- 0.1S, DEC=13D 28' 58.23" +/- 1" ! PLATE-ID=0000 Equinox:J2000 RV_or_Z:z=0.605 Flux:R=23.5 Comments:High redshift galaxy producing absorption in the spectrum of the background QSO. Target_Number:6 Target_Name:Q1019-FIELD Alternate_Names: Description:GALAXY Position:RA=10H 22M 30.3S +/- 0.1S, DEC=30D 41' 04.87" +/- 1" ! PLATE-ID=0000 Equinox:J2000 RV_or_Z:z=0.346 Flux:R=20.8 Comments:High redshift galaxy producing absorption in the spectrum of the background QSO. Target_Number:7 Target_Name:Q1254-FIELD Alternate_Names: Description:GALAXY Position:RA=12H 56M 59.9S +/- 0.1S, DEC=04D 27' 34.0" +/- 1" ! PLATE-ID=0000 Equinox:J2000 RV_or_Z:z=0.519 Flux:R=23.4 Comments:High redshift galaxy producing absorption in the spectrum of the background QSO. Target_Number:8 Target_Name:Q1241-FIELD Alternate_Names: Description:GALAXY Position:RA=12H 44M 10.8S +/- 0.1S, DEC=17D 21' 04.0" +/- 1" ! PLATE-ID=0000 Equinox:J2000 RV_or_Z:z=0.550 Flux:R=21.9 Comments:High redshift galaxy producing absorption in the spectrum of the background QSO. Target_Number:9 Target_Name:Q1332-FIELD Alternate_Names: Description:GALAXY Position:RA=13H 34M 11.67S +/- 0.1S, DEC=55D 01' 25.5" +/- 1" ! PLATE-ID=0000 Equinox:J2000 RV_or_Z:z=0.374 Flux:R=19.7 Comments:High redshift galaxy producing absorption in the spectrum of the background QSO. Target_Number:10 Target_Name:Q1511-FIELD Alternate_Names: Description:GALAXY Position:RA=15H 13M 29.3S +/- 0.1S, DEC=10D 11' 06.0" +/- 1" ! PLATE-ID=0000 Equinox:J2000 RV_or_Z:z=0.0.437 Flux:R=21.6 Comments:High redshift galaxy producing absorption in the spectrum of the background QSO. Target_Number:11 Target_Name:Q1623-FIELD Alternate_Names: Description:GALAXY Position:RA=16H 25M 48.77S +/- 0.1S, DEC=26D 46' 59.9" +/- 1" ! PLATE-ID=0000 Equinox:J2000 RV_or_Z:z=0.889 Flux:R=22.4 Comments:High redshift galaxy producing absorption in the spectrum of the background QSO. Target_Number:12 Target_Name:Q2206-FIELD Alternate_Names: Description:GALAXY Position:RA=22H 08M 52.1S +/- 0.1S, DEC=-19D 43' 59.4" +/- 1" ! PLATE-ID=0000 Equinox:J2000 RV_or_Z:z=0.759 Flux:R=22.5 Comments:High redshift galaxy producing absorption in the spectrum of the background QSO. ! This is a template for a single visit containing a single exposure ! Repeat exposure and visit blocks as needed Visits ! Section 6 Visit_Number:01 Visit_Requirements: ORIENT 33D TO 63D On_Hold_Comments: Visit_Comments: Exposure_Number:1 Target_Name:Q0058-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2200S Special_Requirements:EXPAND Exposure_Number:2 Target_Name:Q0058-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2400S Special_Requirements:EXPAND POS TARG -0.75,+0.75 Visit_Number:02 Visit_Requirements: ORIENT 68D TO 95D On_Hold_Comments: Visit_Comments: Exposure_Number:1 Target_Name:Q0150-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2200S Special_Requirements:EXPAND Exposure_Number:2 Target_Name:Q0150-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2400S Special_Requirements:EXPAND POS TARG -0.75,+0.75 Visit_Number:03 Visit_Requirements: ORIENT 68D TO 100D On_Hold_Comments: Visit_Comments: Exposure_Number:1 Target_Name:Q0229-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2200S Special_Requirements:EXPAND Exposure_Number:2 Target_Name:Q0229-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2400S Special_Requirements:EXPAND POS TARG -0.75,+0.75 Visit_Number:04 Visit_Requirements: ORIENT 85D TO 90D On_Hold_Comments: Visit_Comments: Exposure_Number:1 Target_Name:Q0836-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2200S Special_Requirements:EXPAND Exposure_Number:2 Target_Name:Q0836-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2400S Special_Requirements:EXPAND POS TARG -0.75,+0.75 Visit_Number:05 Visit_Requirements: ORIENT 87D TO 106D On_Hold_Comments: Visit_Comments: Exposure_Number:1 Target_Name:Q0843-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2200S Special_Requirements:EXPAND Exposure_Number:2 Target_Name:Q0843-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2400S Special_Requirements:EXPAND POS TARG -0.75,+0.75 Visit_Number:06 Visit_Requirements: ORIENT 96D TO 116D On_Hold_Comments: Visit_Comments: Exposure_Number:1 Target_Name:Q1019-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2400S Special_Requirements:EXPAND Exposure_Number:2 Target_Name:Q1019-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2400S Special_Requirements:EXPAND POS TARG -0.75,+0.75 Visit_Number:07 Visit_Requirements: ORIENT 100D TO 110D On_Hold_Comments: Visit_Comments: Exposure_Number:1 Target_Name:Q1254-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2200S Special_Requirements:EXPAND Exposure_Number:2 Target_Name:Q1254-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2400S Special_Requirements:EXPAND POS TARG -0.75,+0.75 Exposure_Number:3 Target_Name:Q1254-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2400S Special_Requirements:EXPAND POS TARG +0,+0.75 Visit_Number:08 Visit_Requirements: ORIENT 107D TO 135D On_Hold_Comments: Visit_Comments: Exposure_Number:1 Target_Name:Q1241-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2200S Special_Requirements:EXPAND Exposure_Number:2 Target_Name:Q1241-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2400S Special_Requirements:EXPAND POS TARG -0.75,+0.75 Visit_Number:09 Visit_Requirements: ORIENT 194D TO 219D On_Hold_Comments: Visit_Comments: Exposure_Number:1 Target_Name:Q1332-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2500S Special_Requirements:EXPAND Visit_Number:10 Visit_Requirements: ORIENT 265D TO 300D On_Hold_Comments: Visit_Comments: Exposure_Number:1 Target_Name:Q1511-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2200S Special_Requirements:EXPAND Exposure_Number:2 Target_Name:Q1511-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2400S Special_Requirements:EXPAND POS TARG -0.75,+0.75 Visit_Number:11 Visit_Requirements: ORIENT 180D TO 200D On_Hold_Comments: Visit_Comments: Exposure_Number:1 Target_Name:Q1623-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2400S Special_Requirements: Exposure_Number:2 Target_Name:Q1623-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2400S Special_Requirements:EXPAND POS TARG -0.75,+0.75 Visit_Number:12 Visit_Requirements: ORIENT 248D TO 270D On_Hold_Comments: Visit_Comments: Exposure_Number:1 Target_Name:Q2206-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2200S Special_Requirements:EXPAND Exposure_Number:2 Target_Name:Q2206-FIELD Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F702W Number_of_Iterations:1 Time_Per_Exposure:2400S Special_Requirements:EXPAND POS TARG -0.75,+0.75 Data_Distribution ! 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