Cosmology is beginning to constrain the nature of the earliest stars and galaxies to form in the Universe, but direct observation of galaxies at z>6 remains highly challenging due to their scarcity, intrinsically small size, and high luminosity distance. GRB afterglows, thanks to their extreme luminosities, offer the possibility of circumventing these normal constraints by providing redshifts and spectral information which couldn't be obtained through direct observation of the host galaxies themselves. In addition, the association of GRBs with massive stars means that they are an indicator of star formation, and that their hosts are likely responsible for a large proportion of the ionizing radiation during that era. Our collaboration is conducting a campaign to rapidly identify and study candidate very high redshift bursts, bringing to bear a network of 2, 4 and 8m telescopes with near-IR instrumentation. Swift has proven capable of detecting faint, distant GRBs, and reporting accurate positions for many bursts in near real-time. Here we propose to continue our HST program of targetting GRBs at z~6 and above. HST is crucial to this endeavour, allowing us (a) to characterise the basic properties, such as luminosity and colour, and in some cases morphologies, of the hosts, which is essential to understanding these primordial galaxies and their relationship to other galaxy populations; and (b) to monitor the late time afterglows and hence compare them to lower-z bursts and test the use of GRBs as standard candles.

We will observe the host galaxies of three GRBs which lie at high redshift. Two of these are spectroscopically confirmed (GRB 080913 at z=6.7 and GRB 090423 at z=8.3), while the final one has a photometric redshift suggesting z~8-9 (GRB 090429B), but this will be strongly tested by our observations. Our strategy for each burst is described below: For GRB 090423 we will obtain 10 orbits of observation in each of F125W and F160W, split into 5 orbit visits for scheduling purposes. These will each reach 3 sigma limits around 28.5(AB), sufficient to detect ~50% of the UDF z-band dropouts should they be shifted to z=8.3. If necessary we will stack the two filters to obtain deeper limits, although a detection would also yield a colour measurement. For GRB 080913 we will obtain 3 orbits of in F160W with the principle aim of detecting the host galaxy. These observations will reach limiting magnitudes of F160W(AB)=27.9 (3-sigma). Subject to success of these observations we will follow up with a further 3 orbit visit in F110W. For 090429B the absence of a spectroscopic redshift means our primary aim is to confirm the photometric redshift. Hence we will conduct two one orbit visits using ACS/WFC F606W and WFC3 with F160W. The primary aim of these observations is again to search for a host galaxy. If the high redshift scenario is correct we expect the object to be non-detected in the F606W observations, and very faint (or non-detected) in F160W. COSMOLOGY 12 false 0.0 0.0 false false false false false false SUPPORTED GALAXY HIGH REDSHIFT GALAXY J2000 00 00 0.0000 +00 00 0.00 J2000 GALAXY HIGH REDSHIFT GALAXY J2000 00 00 0.0000 +00 00 0.00 J2000 GALAXY HIGH REDSHIFT GALAXY J2000 00 00 0.0000 +00 00 0.00 J2000 WFPC2 Imaging No F785LP WFPC2 Imaging No F850LP NIC3 Imaging No No F160W WFPC2 Imaging No F814W NIC3 Imaging No No F160W WFPC2 Imaging No F850LP NIC3 Imaging No No F160W WFPC2 Imaging No F814W NIC3 Imaging No No F160W NIC3 Imaging No No F160W NIC3 Imaging No No F160W POS-TARG DITHER 0.636 LINE false false 2 41.788 WFC3-IR-DITHER-LINE 3 false POS-TARG DITHER DITHER 2 0.572 WFC3-IR-DITHER-LINE 0.365 false false 74.653 0.636 4 18.528 POS-TARG BOX 41.788 4 true POS-TARG DITHER DITHER 2 .604 LINE false false .473 3 41.788 POS-TARG LINE 0 7 true POS-TARG DITHER 0.265 LINE 0.187 false false 69.05 4 20.67 ACS-WFC-DITHER-BOX 8 false POS-TARG DITHER 0.572 LINE 0.365 false false 74.653 4 18.528 WFC3-IR-DITHER-BOX-MIN 9 false Repeat of failed visit J1 1287237932000 293.2094120032475 (Tic-Visit :proposal-id 11189 :visit-id "J1" :proposal-version -1 :trans-version "20090915" :date "28-Jan-2010 14:53:13.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 2611296 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11189 :visit-id "J1" :obset-id "J1" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11189 :visit-id "J1" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "J1" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "J1" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "J1" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "J1" :orbit-number 5 :pcs-time 222 :si-vis-utilization 2710 :al-overhead-at-end 0 :internal-dur-at-end 459 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3144 :pcs-gap 0 ) false 5 0 Repeat of failed visit J2 1287771331000 293.0 (Tic-Visit :proposal-id 11189 :visit-id "J2" :proposal-version -1 :trans-version "20090915" :date "28-Jan-2010 14:53:17.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 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:obset-id "H2" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11189 :visit-id "H2" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "H2" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "H2" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "H2" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "H2" :orbit-number 5 :pcs-time 222 :si-vis-utilization 2710 :al-overhead-at-end 0 :internal-dur-at-end 459 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3144 :pcs-gap 0 ) false 5 0 Repeat of failed visit 03 ORIENT 293-293 is to make SAME ORIENT AS J1. (Tic-Visit :proposal-id 11189 :visit-id "H2" :proposal-version -1 :trans-version "20090915" :date "28-Jan-2010 14:53:22.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 2611296 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11189 :visit-id "H2" :obset-id "H2" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11189 :visit-id "H2" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "H2" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "H2" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "H2" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "H2" :orbit-number 5 :pcs-time 222 :si-vis-utilization 2710 :al-overhead-at-end 0 :internal-dur-at-end 459 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3144 :pcs-gap 0 ) false 5 0 Same orient constraint links visits (H1 H2 J1 J2) The scheduling data was generated by CASM 17.5. CASM was run in Phase II mode. 1264510680000 293.0 (Tic-Visit :proposal-id 11189 :visit-id "J1" :proposal-version -1 :trans-version "20090915" :date "28-Jan-2010 14:53:13.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 2611296 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11189 :visit-id "J1" :obset-id "J1" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11189 :visit-id "J1" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "J1" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "J1" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "J1" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "J1" :orbit-number 5 :pcs-time 222 :si-vis-utilization 2710 :al-overhead-at-end 0 :internal-dur-at-end 459 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3144 :pcs-gap 0 ) false 5 0 Same orient constraint links visits (H1 H2 J1 J2) The scheduling data was generated by CASM 17.5. CASM was run in Phase II mode. 1264596962000 293.0 (Tic-Visit :proposal-id 11189 :visit-id "J2" :proposal-version -1 :trans-version "20090915" :date "28-Jan-2010 14:53:17.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 2611296 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11189 :visit-id "J2" :obset-id "J2" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11189 :visit-id "J2" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "J2" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "J2" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "J2" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "J2" :orbit-number 5 :pcs-time 222 :si-vis-utilization 2710 :al-overhead-at-end 0 :internal-dur-at-end 459 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3144 :pcs-gap 0 ) true 5 0 Same orient constraint links visits (H1 H2 J1 J2) The scheduling data was generated by CASM 17.5. CASM was run in Phase II mode. 1264332372000 293.0 (Tic-Visit :proposal-id 11189 :visit-id "H1" :proposal-version -1 :trans-version "20090915" :date "28-Jan-2010 14:53:20.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 2611296 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11189 :visit-id "H1" :obset-id "H1" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11189 :visit-id "H1" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "H1" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "H1" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "H1" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "H1" :orbit-number 5 :pcs-time 222 :si-vis-utilization 2710 :al-overhead-at-end 0 :internal-dur-at-end 459 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3144 :pcs-gap 0 ) true 5 0 Same orient constraint links visits (H1 H2 J1 J2) The scheduling data was generated by CASM 17.5. CASM was run in Phase II mode. 1264430158000 293.0 (Tic-Visit :proposal-id 11189 :visit-id "H2" :proposal-version -1 :trans-version "20090915" :date "28-Jan-2010 14:53:22.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 2611296 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11189 :visit-id "H2" :obset-id "H2" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11189 :visit-id "H2" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "H2" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "H2" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "H2" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2710 :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 3144 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "H2" :orbit-number 5 :pcs-time 222 :si-vis-utilization 2710 :al-overhead-at-end 0 :internal-dur-at-end 459 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3144 :pcs-gap 0 ) true 5 0 The scheduling data was generated by CASM 17.5. CASM was run in Phase II mode. 1259596908000 342.4 (Tic-Visit :proposal-id 11189 :visit-id "G1" :proposal-version -1 :trans-version "20090915" :date "28-Jan-2010 14:53:24.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1566784 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11189 :visit-id "G1" :obset-id "G1" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11189 :visit-id "G1" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2710 :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 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "G1" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2710 :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 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11189 :visit-id "G1" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2710 :al-overhead-at-end 0 :internal-dur-at-end 269 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 3 0 The scheduling data was generated by CASM 17.5. CASM was run in Phase II mode. 1263159929000 281.0 (Tic-Visit :proposal-id 11189 :visit-id "B2" :proposal-version -1 :trans-version "20090915" :date "28-Jan-2010 14:53:26.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11189 :visit-id "B2" :obset-id "B2" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11189 :visit-id "B2" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2640 :al-overhead-at-end 0 :internal-dur-at-end 478 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 17.5. CASM was run in Phase II mode. 1266866046000 244.688652039 (Tic-Visit :proposal-id 11189 :visit-id "B3" :proposal-version -1 :trans-version "20090915" :date "28-Jan-2010 14:49:46.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11189 :visit-id "B3" :obset-id "B3" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11189 :visit-id "B3" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2640 :al-overhead-at-end 0 :internal-dur-at-end 478 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 17.5. CASM was run in Phase II mode. 1266981086000 244.688652039 (Tic-Visit :proposal-id 11189 :visit-id "Y1" :proposal-version -1 :trans-version "20090915" :date "28-Jan-2010 14:49:47.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11189 :visit-id "Y1" :obset-id "Y1" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11189 :visit-id "Y1" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2640 :al-overhead-at-end 0 :internal-dur-at-end 478 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 17.5. CASM was run in Phase II mode. 1267364881000 244.688652039 (Tic-Visit :proposal-id 11189 :visit-id "Y2" :proposal-version -1 :trans-version "20090915" :date "28-Jan-2010 15:37:26.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11189 :visit-id "Y2" :obset-id "Y2" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11189 :visit-id "Y2" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2640 :al-overhead-at-end 0 :internal-dur-at-end 478 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 17.5. CASM was run in Phase II mode. 1262487813000 293.3423064405399 (Tic-Visit :proposal-id 11189 :visit-id "B1" :proposal-version -1 :trans-version "20090915" :date "28-Jan-2010 14:53:28.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 1136896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11189 :visit-id "B1" :obset-id "B1" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11189 :visit-id "B1" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2794 :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 3152 :pcs-gap 0 ) true 1 0