! Hubble Space Telescope Cycle 6 (1996) Phase II Proposal Template ! $Id: 6665,v 5.1 1996/04/22 19:24:10 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: Karla Peterson ! Phone: 410-338-4774 , E-mail: peterson@stsci.edu ! ! This partially completed template was generated from a Phase I proposal. Proposal_Information ! Section 4 Title: Galaxy Rotation Curves at Large Radius using Ly-alpha Absorption Lines Proposal_Category: GO Scientific_Category: COSMOLOGY Cycle: 6 Investigators PI_name: Stephanie Cote PI_Institution: ESO CoI_Name: Tom Broadhurst CoI_Institution: University of California, Berkeley Contact: ! Y or N (designate at most one contact) CoI_Name: Claude Carignan CoI_Institution: Universite de Montreal Contact: ! Y or N (designate at most one contact) CoI_Name: Ken Freeman CoI_Institution: Mount Stromlo Observatory Contact: ! Y or N (designate at most one contact) CoI_Name: Rosie Wyse CoI_Institution: Johns Hopkins University Contact: ! Y or N (designate at most one contact) Abstract: ! Free format text (please update) It is possible to detect a gaseous disk in absorption in the spectrum of a bright background quasar, down to HI column densities of only 10E13 atoms/cm2. We propose to investigate the outer rotation curves of two spiral galaxies at very large galactocentric radii by using the kinematical information from Ly-alpha absorption lines in the spectrum of background quasars. This will enable us to measure the disc rotation at 5 times greater radius than what is possible in HI. By constraining the rotation at these large radii one may hope to observe the expected turn down from flat rotation, determining for the first time the size of the dark matter halo and hence measure the total mass and mass-to-light ratio of disc galaxies. Questions ! Free format text (please update) Observing_Description: We want to target our 2 QSOs with the GHRS Blue side with the G140L grating to detect an absorption feature at 1220 Angstrom , with a velocity precision of about 1/3 of the resolution (50 km/s). The SSA aperture will be preferred over the LSA because the LSA slightly degrades the full resolution and more importantly we have to make sure that the Geocoronal LyAlpha pollution does not spread over to 1220 Angstrom . Our QSOs are respectively V=15.6 and V=15.83, with low E(B-V) of 0.00 and 0.02. PG1309+355 has a measured flux at 1220 Angstrom from IUE (Courvoisier and Paltani 1992) of F_1220 = 4 * 10E-15 ergs/s/cm2/Angstrom. For PG0923+201 we have calculated the flux to be expected at 1220 Angstrom , knowing its redshift and using a template of the rest-frame spectral energy distribtion of a quasar built from the IUE archives (Schneider et al 1993), and with reddenings corrections this comes to F_1220=6.8*10E-16 ergs/s/cm2/Angstrom. Using a sensitivity S_Lambda =55 * 10E11 counts/s/diode (this takes account of a 50% loss with the SSA), this leads to count rates of 2.2 * 10E-2 and 3.8 * 10E-3 counts/s/diode. Fortunatly we only need a S/N of about 3, to get to a equivalent width of 0.35 Angstroms. The requested exposure times are 35 minutes and 5.2 hours respectively, using the CENSOR option to reduce the dark counts. We will need to do the target aquisitions with Side 2. Counting with this and the other overheads, this comes to a total of 2 orbits and 8 orbits. Real_Time_Justification: None Calibration_Justification: ! Move appropriate text from Real_Time_Justification None Additional_Comments: Fixed_Targets ! Section 5.1 Target_Number: 1 Target_Name: PG0923+201 Alternate_Names: Description: GALAXY,QSO Position: RA=09H 25M 54.71S +/- 0.05S, DEC=+19D 54' 04.39" +/- 0.3", PLATE-ID=01G6 Equinox: J2000.0 RV_or_Z: Z=0.19 RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: Flux: V=15.83 +/- 0.2, B-V= 0.15 +/- 0.2, ! Include at least V and B-V E(B-V)= 0.02, F(1220)= 6.8 +/- 10 E-16 Comments: Target_Number: 2 Target_Name: PG1309+355 Alternate_Names: Description: GALAXY,QUASAR Position: RA=13H 12M 17.74S +/- 0.05S, DEC=+35D 15' 20.61" +/- 0.3", PLATE-ID=01PR Equinox: J2000.0 RV_or_Z: Z=0.184 RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: Flux: V= 15.6 +/- 0.2, B-V= 0.15 +/- 0.2, ! Include at least V and B-V E(B-V)= 0.0, F(1220)= 4 +/- 1 E-15 Comments: ! 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: ! Section 7.1 ! Uncomment or copy visit level special requirements needed ! Most of these requirements (including ORIENT) will limit scheduling On_Hold_Comments: Visit_Comments: Exposure_Number: 101 ! Section 6.5 Target_Name: PG0923+201 Config: HRS Opmode: ACQ Aperture: 2.0 Sp_Element: MIRROR-N2 ! Acquisition with side 2 Wavelength: Optional_Parameters: BRIGHT=RETURN, SEARCH-SIZE=3 ! Defaults Number_of_Iterations: 1 Time_Per_Exposure: 103.5S Special_Requirements: ONBOARD ACQ FOR 102 SEQ 101-102 NON-INT Comments: STEP-TIME= 11.50S Exposure_Number: 102 ! Section 6.5 Target_Name: PG0923+201 Config: HRS Opmode: ACQ/PEAKUP Aperture: 0.25 Sp_Element: MIRROR-N2 Wavelength: Optional_Parameters: SEARCH-SIZE=5 ! Default Number_of_Iterations: 1 Time_Per_Exposure: 287.5S Special_Requirements: ONBOARD ACQ FOR 103-106 ! Section 7.2 Comments: STEP-TIME= 11.50S Exposure_Number: 103 ! Section 6.5 Target_Name: PG0923+201 Config: HRS Opmode: ACCUM Aperture: 0.25 Sp_Element: G140L ! switching to side 1 Wavelength: 1333.0 Optional_Parameters: FP-SPLIT=NO, STEP-PATT=DEF, CENSOR=YES Number_of_Iterations: 8 Time_Per_Exposure: 598.4S Special_Requirements: ! Section 7.2 Comments: STEP-TIME=0.2S Exposure_Number: 104 ! Section 6.5 Target_Name: PG0923+201 Config: HRS Opmode: ACCUM Aperture: 0.25 Sp_Element: G140L Wavelength: 1333.0 Optional_Parameters: FP-SPLIT=NO, STEP-PATT=DEF, CENSOR=YES Number_of_Iterations: 8 Time_Per_Exposure: 598.4S Special_Requirements: ! Section 7.2 Comments: STEP-TIME=0.2S Exposure_Number: 105 ! Section 6.5 Target_Name: PG0923+201 Config: HRS Opmode: ACCUM Aperture: 0.25 Sp_Element: G140L Wavelength: 1333.0 Optional_Parameters: FP-SPLIT=NO, STEP-PATT=DEF, CENSOR=YES Number_of_Iterations: 8 Time_Per_Exposure: 598.4S Special_Requirements: ! Section 7.2 Comments: STEP-TIME=0.2S Exposure_Number: 106 ! Section 6.5 Target_Name: PG0923+201 Config: HRS Opmode: ACCUM Aperture: 0.25 Sp_Element: G140L Wavelength: 1333.0 Optional_Parameters: FP-SPLIT=NO, STEP-PATT=DEF, CENSOR=YES Number_of_Iterations: 7 Time_Per_Exposure: 598.4S Special_Requirements: ! Section 7.2 Comments: STEP-TIME=0.2S ! visit 2 Visit_Number: 02 Visit_Requirements: ! Section 7.1 On_Hold_Comments: Visit_Comments: Exposure_Number: 201 ! Section 6.5 Target_Name: PG1309+355 Config: HRS Opmode: ACQ Aperture: 2.0 Sp_Element: MIRROR-N2 Wavelength: Optional_Parameters: BRIGHT=RETURN, SEARCH-SIZE=3 Number_of_Iterations: 1 Time_Per_Exposure: 105.75S Special_Requirements: ONBOARD ACQ FOR 202 ! Section 7.2 Comments: STEP-TIME= 11.75S Exposure_Number: 202 ! Section 6.5 Target_Name: PG1309+355 Config: HRS Opmode: ACQ/PEAKUP Aperture: 0.25 Sp_Element: MIRROR-N2 Wavelength: Optional_Parameters: SEARCH-SIZE=5 Number_of_Iterations: 1 Time_Per_Exposure: 293.75S Special_Requirements: ONBOARD ACQ FOR 203-204 ! Section 7.2 Comments: STEP-TIME= 11.75S Exposure_Number: 203 ! Section 6.5 Target_Name: PG1309+355 Config: HRS Opmode: ACCUM Aperture: 0.25 Sp_Element: G140L ! switching to Side 1 Wavelength: 1333.0 Optional_Parameters: FP-SPLIT=NO, STEP-PATT=DEF, CENSOR=YES Number_of_Iterations: 4 Time_Per_Exposure: 598.4S Special_Requirements: ! Section 7.2 Comments: STEP-TIME= 0.2S Exposure_Number: 204 ! Section 6.5 Target_Name: PG1309+355 Config: HRS Opmode: ACCUM Aperture: 0.25 Sp_Element: G140L Wavelength: 1333.0 Optional_Parameters: FP-SPLIT=NO, STEP-PATT=DEF, CENSOR=YES Number_of_Iterations: 1 Time_Per_Exposure: 54.4S Special_Requirements: ! Section 7.2 Comments: STEP-TIME= 0.2S Data_Distribution ! Defaults indicated; change if desired Medium: 8MM ! 8MM or 6250BPI or 1600BPI Blocking_Factor: 10 ! 10 or 1 ! Only astronomers with very old 9- ! track tape drives should consider ! a blocking factor of 1 Ship_To: PI_Address ! STSCI or PI_Address or ! PI Address from Phase I is: ! ! Karl-Schwarzschild-Str 2 ! Garching bei Muenchen ! D-85748 ! ! Ship_Via: UPS ! UPS (2-day) or OVERNIGHT ! Overnight shipping done at PI expense Recipient_Email: ! Needed if Ship_To: is not PI_Address ! ! Let us know what you think of this template and software! ! Please send a list of your likes and dislikes to your Program Coordinator