! Proposal 6711, submission 1 ! PI: Robert Jedrzejewski ! Received Fri Feb 2 15:46:17 EST 1996 ! From: rij@stsci.edu ! Hubble Space Telescope Cycle 6 (1996) Phase II Proposal Template ! $Id: 6711,v 5.1 1997/05/31 22:36:07 pepsa Exp $ ! Hubble Space Telescope Cycle 6 (1996) Phase II Proposal Template ! $Id: 6711,v 5.1 1997/05/31 22:36:07 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: Lucas ! Phone: 410-338-4716 , E-mail: lucas@stsci.edu ! ! This partially completed template was generated from a Phase I proposal. ! Name of Phase I Proposal: archive-0829.jedrzejewski.pro ! Date generated: Fri Dec 22 16:39:22 EST 1995 ! Proposal_Information ! Section 4 Title: Confirmation of a New Small-Separation Gravitational Lens Candidate Proposal_Category: GO Scientific_Category: COSMOLOGY Cycle: 6 Investigators PI_name: Robert Jedrzejewski PI_Institution: Space Telescope Science Institute CoI_Name: Peter Jakobsen CoI_Institution: Astrophysics Division, ESA/ESTEC Contact: ! Y or N (designate at most one contact) CoI_Name: Perry Greenfield CoI_Institution: Space Telescope Science Institute Contact: ! Y or N (designate at most one contact) Abstract: ! Free format text (please update) Cycle 4 HST FOC objective prism images of the luminous z=3.16 quasar UM670 suggest that this object may be gravitationally lensed, with the components having a separation of only 0.1" and a magnitude difference of about 2 magnitudes. Such a small-separation object would be unique among known lens candidates and would require revision of inputs to models of gravitational lens statistics. We propose to confirm this finding through high-resolution imaging using the FOC. Questions ! Free format text (please update) Observing_Description: We will take observations using the F/96 relay of the FOC, with filters F342W and F220W. This will give a count rate of approximately 0.6 count/sec/pixel in the center of the PSF for the F342W+F2ND+F1ND filter (assuming a QSO flux of 2x10^-16 flam), and similar with the F220W filter (assuming 2x10^-16 flam, but could be a factor of 2 lower). Exposure times will be 1000s. This will provide approximately 100-200 counts in the central pixel for the fainter component, allowing estimation of the flux to 10\% or so. Use of the F480LP filter would have put the fainter component right on the first diffraction ring of the primary, so it was necessary to use filters where the ring was smaller - hence the use of F342W and F220W. If the (F342W-F220W) color of the secondary is the same as that of the primary, then it would be strong evidence of a lensed component, since not many celestial sources have such a color (essentially a power law in Flam with index 0). Real_Time_Justification: None None. Calibration_Justification: ! Move appropriate text from Real_Time_Justification Additional_Comments: Fixed_Targets ! Section 5.1 Target_Number: 1 Target_Name: UM670 Alternate_Names: Q1442+102 Description: GALAXY,QSO Position: RA=01H 17M 23.34S +/- 0.1S, ! RA=0H 0M 0.00S +/- 0S, DEC=-08D 41' 32.4" +/- 1" ! DEC=0D 0' 0.0" +/- 0", ! PLATE-ID=0000 Equinox: 2000 RV_or_Z: Z=3.53 RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: Flux: V=17.8 ! Include at least V and B-V 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: 1 Visit_Requirements: ! Section 7.1 ! Uncomment or copy visit level special requirements needed ! Most of these requirements (including ORIENT) will limit scheduling ! PCS MODE [Fine | Gyro] ! GUIDing TOLerance ! DROP TO GYRO IF NECESSARY [NO REACQuisition] ! ORIENTation TO ! ORIENTation TO FROM ! ORIENTation TO FROM NOMINAL ! SAME ORIENTation AS ! CVZ ! PARallel ! SCHEDulability ! AFTER [BY [TO ]] ! AFTER ! BEFORE ! BETWEEN AND ! GROUP WITHIN