! Proposal 6586, submission 2 ! PI: John Stocke ! Received Wed Sep 18 18:21:53 EDT 1996 ! From: spenton@casa.Colorado.EDU ! Hubble Space Telescope Cycle 6 (1996) Phase II Proposal Template ! $Id: 6586,v 7.1 1996/11/12 15:08:51 pepsa Exp $ ! Hubble Space Telescope Cycle 6 (1996) Phase II Proposal Template ! $Id: 6586,v 7.1 1996/11/12 15:08:51 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: Taylor ! Phone: 410-338-4824 , E-mail: dctaylor@stsci.edu ! ! This partially completed template was generated from a Phase I proposal. ! Name of Phase I Proposal: archive-0505.stocke.prop ! Date generated: Fri Dec 22 18:36:19 EST 1995 ! Proposal_Information ! Section 4 Title: A Metal Absorption Line System in the Local Supercluster ? Proposal_Category: GO Scientific_Category: QSO ABSORPTION LINES Cycle: 6 Investigators PI_name: John Stocke PI_Institution: University of Colorado, Boulder CoI_Name: Mr. Steven Penton CoI_Institution: University of Colorado, Boulder Contact: ! Y or N (designate at most one contact) Abstract: ! Free format text (please update) We request a single HST orbit with the GHRS+G270M to observe the bright Seyfert III Zw 2 to confirm a possible ionMg2 absorption system at cz=2,225 kms. At this redshift, this possible cloud is at the far edge of the local supercluster, and thus at the edge of the large void between the local supercluster and the Perseus-Pisces supercluster. The Arecibo redshift survey in this direction allows us to conclude that there are no galaxies brighter than -16.5 within 1.5 h^-1_100 Mpc of this cloud. Since this cloud is so close (m-M)=32, the verification of this cloud's existence with the GHRS would allow a detailed study of a ionMg2 absorber associated with a dwarf galaxy, an intergalactic cloud, or perhaps even with a galaxy void (which would be unprecedented and quite unexpected). But this system must be confirmed before any scientific conclusions can be drawn. A faint galaxy survey of this region is already underway at the NOAO/WIYN telescope with the HYDRA spectrograph to search for possible associated galaxies. Questions ! Free format text (please update) Observing_Description: Using the GHRS+G270M a \onequarter Angstrom resolution spectrum covering both the Galactic ionMg2 lines and the possible extragalactic ionMg2 lines (2787--2833Angstrom) will be observed. The presence of the strong Galactic lines will provide a useful velocity reference so that the velocity scale can be established to + 15 kms. A single orbit will be sufficient to obtain a signal-to-noise per pixel of 15:1, easily sufficient to confirm these lines. Real_Time_Justification: None. We are in the process of conducting a 1degrees radius, pencil -beam galaxy redshift survey of the III Zw 2 region using the NOAO/WIYN telescope with the HYDRA multi-object spectrograph. Approximately 200 galaxies will be observed down to a limiting magnitude of ~ 19th, which corresponds to -14 at the distance to the absorber. Should HST confirm this possible absorber, we will use the VLA in its standard D configuration in the redshifted 21 cm line of ionH1 to search for gas rich dwarfs and intergalactic clouds. Calibration_Justification: ! Move appropriate text from Real_Time_Justification Additional_Comments: Please expand the last exposure to fill the orbit, if possible. Fixed_Targets ! Section 5.1 Target_Number: 1 Target_Name: IIIZW2 Alternate_Names: MRK1501 Description: Galaxy,Seyfert Position: RA=00H 10M 31.006S +/- 0.03S, ! Most common specification format is DEC=10D 58' 29.57" +/- 0.3", ! RA=0H 0M 0.00S +/- 0S, PLATE-ID=00GQ ! DEC=0D 0' 0.0" +/- 0", ! PLATE-ID=0000 Equinox: 2000 RV_or_Z: Z=0.090 RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: Flux: V = 15.40 +/- 0.5, B-V = 0.56 +/- 0.1, F-CONT(2810)=2.6 +/- 0.2 E-14 Comments: Visits ! Section 6 Visit_Number: 1 Visit_Requirements: ! Section 7.1 On_Hold_Comments: Visit_Comments: IIIZW2-G270M-1 Wavelength Setting Exposure_Number: 1 ! Section 6.5 Target_Name: IIIZW2 Config: HRS Opmode: ACQ Aperture: 2.0 Sp_Element: MIRROR-N2 Wavelength: Optional_Parameters: BRIGHT=RETURN Number_of_Iterations: 1 Time_Per_Exposure: 13.5S Special_Requirements: ONBOARD ACQuisition FOR 2 ! Section 7.2 Comments: STEP-TIME=1.5S Exposure_Number: 2 ! Section 6.5 Target_Name: IIIZW2 Config: HRS Opmode: ACCUM Aperture: 2.0 Sp_Element: G270M Wavelength: 2787-2833 Optional_Parameters: FP-SPLIT=STD,STEP-PATT=DEF,DOPPLER=ON Number_of_Iterations: 1 Time_Per_Exposure: 1523.2S Special_Requirements: Visit_Number: 51 Visit_Requirements: ! Section 7.1 On_Hold_Comments: Visit_Comments: IIIZW2-G270M-1 Wavelength Setting Exposure_Number: 1 ! Section 6.5 Target_Name: IIIZW2 Config: HRS Opmode: ACQ Aperture: 2.0 Sp_Element: MIRROR-N2 Wavelength: Optional_Parameters: BRIGHT=RETURN Number_of_Iterations: 1 Time_Per_Exposure: 13.5S Special_Requirements: ONBOARD ACQuisition FOR 2 ! Section 7.2 Comments: STEP-TIME=1.5S Exposure_Number: 2 ! Section 6.5 Target_Name: IIIZW2 Config: HRS Opmode: ACCUM Aperture: 2.0 Sp_Element: G270M Wavelength: 2787-2833 Optional_Parameters: FP-SPLIT=STD,STEP-PATT=DEF,DOPPLER=ON Number_of_Iterations: 1 Time_Per_Exposure: 1523.2S Special_Requirements: Data_Distribution ! 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