Strong Gravitational Lensing by Quasars

Assigned ID: 357 ----- Attempting Submission 1 (Fri Feb 26 15:22:31 GMT 2010) ----- HST Phase I Proposal 357 (QSOlenses.apt) successfully submitted. Visits have now 2 orbits, i.e., one per filter. Abstract changed accordingly ----- Attempting Submission 1 (Wed Jun 30 07:30:20 GMT 2010) ----- HST Phase II Proposal 12233 (QSOlens_phaseII.apt) successfully submitted. ----- Attempting Submission 2 (Wed Jul 07 08:39:11 GMT 2010) ----- HST Phase II Proposal 12233 (QSOlens_phaseII.apt) successfully submitted. ----- Attempting Submission 3 (Wed Aug 11 08:31:20 GMT 2010) ----- Strong Gravitational Lensing by Quasars The title is correct: we propose to confirm low redshift quasars acting as strong gravitational lenses on background emission line galaxies. Our sample is selected from 22,298 SDSS spectra of quasars with z < 0.7. Using cross-correlation techniques, we identify 10-15 quasars that have at least two emission lines in their background, among [OII], H beta and the [OIII] doublet. Four of our quasars have all four lines clearly visible in their background. We propose to confirm the lensing nature of these objects with WFC3/UVIS images in the F475W and F814W filters, and to constrain lens models of the quasar host galaxies. Our sample is similar to the SLACS sample of strong lenses, but with quasar host galaxies as lenses. As these galaxies are massive, we expect that most of the background objects will be strongly lensed (as in SLACS), displaying well visible arcs and multiple images within 1-2 arcsec. We propose to obtain sharp images of our targets along with clean PSF. With image deconvolution techniques, we shall remove the quasar and its host galaxy and we shall measure the size and shape of the background Einstein Ring allowing, for the first time, to weigh directly quasar host galaxies and to measure their total radial mass profile with strong gravitational lensing.

This 9-orbit program proposes to obtain deep WFC3 F475W and F814W images of 4 low redshift QSOs acting as strong gravitational lenses on background emission-line galaxies. The goal is to obtain detailed images of the lensed Eintein rings produced by the 4 QSOs in order to study the mass distribution in the QSO host galaxies. For each object, we use one orbit per filter (2 orbits per visit), and use 6 exposures per orbit. The dither pattern is a line with 6 exposures with the first exposure centered on the center of UVIS1. One full orbit is used to measure the PSF of the HST in the two filters in the same observing conditions as the QSOs. The PSF will be used for deconvolution purposes. The field chosen is the open cluster NGC 136. The orbit is divided in 8 exposures: 1x60s + 3x350s in F475W followed by 1x60s + 3x350s in F814W AGN/QUASARS 12 false 0.0 0.0 false false false false false false SUPPORTED GALAXY QSO J2000 10 05 22.0600 +40 16 10.13 J2000 GALAXY QSO J2000 00 13 40.2100 +15 23 12.05 J2000 GALAXY QSO J2000 09 19 26.2200 +27 20 50.97 J2000 STELLAR CLUSTER OPEN CLUSTER J2000 11 12 43.7000 +19 23 15.00 J2000 GALAXY QSO J2000 08 27 25.2000 +52 24 35.12 J2000 WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W POS-TARG DITHER 0.145 LINE false false 6 46.84 WFC3-UVIS-DITHER-LINE 1

false

POS-TARG DITHER 0.145 LINE false false 4 46.84 WFC3-UVIS-DITHER-LINE 3

false

1281514438263 /Users/courbin/Documents/Proposals/Cycle18_phaseII/OP-cache/QSOlens_phaseII_new-v01.xml The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. 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CASM was run in Phase II mode. (Tic-Visit :proposal-id 12233 :visit-id "02" :proposal-version -1 :trans-version "20100505" :date "11-Aug-2010 10:14:02.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 3465008 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12233 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12233 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2916 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3249 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12233 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3024 :al-overhead-at-end 116 :internal-dur-at-end 670 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3249 :pcs-gap 0 ) true 2 0 1281514445695 /Users/courbin/Documents/Proposals/Cycle18_phaseII/OP-cache/QSOlens_phaseII_new-v03.xml The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12233 :visit-id "03" :proposal-version -1 :trans-version "20100505" :date "11-Aug-2010 10:14:05.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 3465008 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12233 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12233 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2922 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12233 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3030 :al-overhead-at-end 116 :internal-dur-at-end 670 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) true 2 0 1281514449678 /Users/courbin/Documents/Proposals/Cycle18_phaseII/OP-cache/QSOlens_phaseII_new-v04.xml The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12233 :visit-id "04" :proposal-version -1 :trans-version "20100505" :date "11-Aug-2010 10:14:09.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 3465008 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12233 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12233 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3108 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3445 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12233 :visit-id "04" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3222 :al-overhead-at-end 116 :internal-dur-at-end 670 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3445 :pcs-gap 0 ) true 2 0 1281514451968 /Users/courbin/Documents/Proposals/Cycle18_phaseII/OP-cache/QSOlens_phaseII_new-v05.xml The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12233 :visit-id "05" :proposal-version -1 :trans-version "20100505" :date "11-Aug-2010 10:14:11.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 2310000 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12233 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12233 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3180 :al-overhead-at-end 118 :internal-dur-at-end 670 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3516 :pcs-gap 0 ) true 1 0