Assigned ID: 127 ----- Attempting Submission 1 (Thu Feb 25 08:59:41 GMT 2010) ----- ----- Attempting Submission 1 (Mon Jun 28 12:29:26 GMT 2010) ----- Understanding the Largest Quasar Lens SDSS J1029+2623 We propose multi-band WFC3/ACS imaging of the unique quasar lens SDSS J1029+2623. It consists of three quasar images at z=2.2 produced by a massive cluster of galaxies at z=0.60. The lens system represents a very rare example of the ``naked cusp'' image configuration, and moreover, the maximum image separation of 22.5'' makes it the largest known quasar lens. We will use the deep WFC3/ACS images to identify many additional multiply-imaged background galaxies, which greatly helps the mass modeling of the central region of the cluster. An accurate mass model is essential to addressing several outstanding questions for this lens, including the anomalous flux ratios between the quasar images and the dynamical state of the lensing cluster. The model will be particularly good because we can combine the strong lensing constraints from HST with our weak lensing measurements on large scales, and also with our deep 60 ksec Chandra X-ray observations.
For reasonable photometric redshifts we need good wavelength coverage. Thus we allocate 2 orbits to F475W filter (ACS/WFC), 3 orbits to the F814W filter (ACS/WFC), and 2 orbits to the F160W filter (WFC3/IR), covering from g- to H-band. Note that we have modified the filter set for the observation from phase I, following the recommendation by the TAC/Panel. COSMOLOGY 12 false 0.0 0.0 false false false false false false SUPPORTED CLUSTER OF GALAXIES GRAVITATIONAL LENS HIGH REDSHIFT CLUSTER J2000 10 29 13.3500 +26 23 32.80 J2000 WFC3/UVIS Imaging No No F475X ACS/WFC Imaging No No F814W WFC3/IR Imaging No No F110W POS-TARG DITHER DITHER 2 6.10486 pattern used in 11591 LINE false true 3.08553 2 91.16385 POS-TARG LINE 85.38987 1 true POS-TARG DITHER 3.08553 pattern used in 11591 LINE false true 2 91.16385 LINE 2 false POS-TARG DITHER 0.572 LINE 0.365 false false 74.653 4 18.528 WFC3-IR-DITHER-BOX-MIN 3 false /Users/oguri/Documents/OP-cache/SDSS1029HSTphaseII-v01.xml The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12195 :visit-id "01" :proposal-version -1 :trans-version "20100505" :date "18-Jun-2010 09:58:19.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 1136896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12195 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12195 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2924 :al-overhead-at-end 0 :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 12195 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3034 :al-overhead-at-end 0 :internal-dur-at-end 349 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) true 2 0 /Users/oguri/Documents/OP-cache/SDSS1029HSTphaseII-v02.xml The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12195 :visit-id "02" :proposal-version -1 :trans-version "20100505" :date "18-Jun-2010 09:58:21.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 1705344 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12195 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12195 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2924 :al-overhead-at-end 0 :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 12195 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3034 :al-overhead-at-end 0 :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 12195 :visit-id "02" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3034 :al-overhead-at-end 0 :internal-dur-at-end 349 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) true 3 0 /Users/oguri/Documents/OP-cache/SDSS1029HSTphaseII-v03.xml The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12195 :visit-id "03" :proposal-version -1 :trans-version "20100505" :date "18-Jun-2010 09:49:12.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 2089056 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12195 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12195 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2840 :al-overhead-at-end 0 :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 12195 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2840 :al-overhead-at-end 0 :internal-dur-at-end 540 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) true 2 0