The Wavelength Dependence of Accretion Disk Structure

modified to carry out visit 02 using WFC3/UVIS/F218W rather than ACS/SBC/F165LP -- timing modified slightly to allow for delay neither change will signfiicantly impact the science. ----- Attempting Submission 9 (Mon Jul 06 16:20:59 GMT 2009) ----- ----- Attempting Submission 10 (Thu Oct 21 13:39:52 GMT 2010) ----- warning on completed visit 06, has no affect on modification to visit02 The Wavelength Dependence of Accretion Disk Structure We can now routinely measure the size of quasar accretion disks using gravitational microlensing of lensed quasars. The next step to testing accretion disk models is to measure the size of accretion disks as a function of wavelength, particularly at the UV and X-ray wavelengths that should probe the inner, strong gravity regime. Here we focus on two four-image quasar lenses that already have optical (R band) and X-ray size measurements using microlensing. We will combine the HST observations with ground-based monitoring to measure the disk size as a function of wavelength from the near-IR to the UV. We require HST to measure the image flux ratios in the ultraviolet continuum near the Lyman limit of the quasars. The selected targets have estimated black hole masses that differ by an order of magnitude, and we should find wavelength scalings for the two systems that are very different because the Blue/UV wavelengths should correspond to parts of the disk near the inner edge for the high mass system but not in the low mass system. The results will be modeled using a combination of simple thin disk models and complete relativistic disk models. While requiring only 18 orbits, success for one system requires observations in both Cycles 16 and 17.

We will be monitoring two gravitational lenses with the SBC/F165LP. The epochs should be spaced to span the visibility periods with roughly equal time periods between the observations. The visibility periods are May-September for Q2237 and December-March for RXJ1131. There are a further 6 epochs approved for Q2237 in Cycle 17, but not scheduled here. The observations themselves are simple single orbit, 4 position dithered SBC/F165LP observations. We have one such image of RXJ1131 already, and the results are as expected. AGN/QUASARS 12 false 0 0.0 false false false false false false SUPPORTED GALAXY GRAVITATIONAL LENS J2000 22 40 30.3400 +03 21 28.80 J2000 GALAXY ACCRETION DISK GRAVITATIONAL LENS J2000 11 31 51.6000 -12 31 57.00 J2000 ACS/SBC Imaging No No F165LP ACS/SBC Imaging No No F165LP ACS/SBC Imaging No No F165LP ACS/SBC Imaging No No F165LP ACS/SBC Imaging No No F165LP ACS/SBC Imaging No No F165LP ACS/SBC Imaging No No F165LP ACS/SBC Imaging No No F165LP ACS/SBC Imaging No No F165LP ACS/SBC Imaging No No F165LP ACS/SBC Imaging No No F165LP ACS/SBC Imaging No No F165LP ACS/SBC Imaging No No F165LP ACS/SBC Imaging No No F165LP ACS/SBC Imaging No No F165LP ACS/SBC Imaging No No F165LP ACS/SBC Imaging No No F165LP ACS/SBC Imaging No No F165LP POS-TARG DITHER 0.179 LINE 0.116 false false 63.65 4 20.02 ACS-SBC-DITHER-BOX 1

false

POS-TARG DITHER 0.145 LINE false false 2 46.84 WFC3-UVIS-DITHER-LINE 2

false

The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1243439485820 1217682365000 244.32415765911094 (Tic-Visit :proposal-id 11791 :visit-id "01" :proposal-version -1 :trans-version "20080807" :date "27-May-2009 11:51:21.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 74064 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11791 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11791 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2901 :al-overhead-at-end 0 :internal-dur-at-end 119 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3236 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. 1287667499574 /tmp/OPVisit62156.xml (Tic-Visit :proposal-id 11791 :visit-id "02" :proposal-version -1 :trans-version "20100505" :date "21-Oct-2010 09:24:59.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11791 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11791 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2900 :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 3234 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1243439491560 1256368472000 60.778051591737494 (Tic-Visit :proposal-id 11791 :visit-id "03" :proposal-version -1 :trans-version "20080807" :date "27-May-2009 11:51:31.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 74064 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11791 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11791 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2901 :al-overhead-at-end 0 :internal-dur-at-end 119 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3236 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1243439494359 1261787105000 60.778051591737494 (Tic-Visit :proposal-id 11791 :visit-id "04" :proposal-version -1 :trans-version "20080807" :date "27-May-2009 11:51:34.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 74064 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11791 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11791 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2901 :al-overhead-at-end 0 :internal-dur-at-end 119 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3236 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1243439497072 1264890639000 114.19156630089259 (Tic-Visit :proposal-id 11791 :visit-id "05" :proposal-version -1 :trans-version "20080807" :date "27-May-2009 11:51:36.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 74064 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11791 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11791 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2917 :al-overhead-at-end 0 :internal-dur-at-end 119 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3251 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1243439501912 1238066089000 28.0 (Tic-Visit :proposal-id 11791 :visit-id "06" :proposal-version -1 :trans-version "20080807" :date "27-May-2009 11:51:40.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 74064 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11791 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11791 :visit-id "06" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2893 :al-overhead-at-end 0 :internal-dur-at-end 119 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3251 :pcs-gap 0 ) true 1 0