During the past few years, robotic (or nearly robotic) searches for supernovae (SNe), most notably our Lick Observatory Supernova Search (LOSS), have found hundreds of SNe, many of them in quite nearby galaxies (cz < 4000 km/s). Most of the objects were discovered before maximum brightness, and have follow-up photometry and spectroscopy; they include some of the best-studied SNe to date. We propose to conduct a survey program to image the sites of some of these nearby objects, to obtain late-time photometry that will help reveal the origin of their lingering energy. The images will also provide high-resolution information on the local environments of SNe that are far superior to what we can procure from the ground. For example, we will obtain color-magnitude diagrams of stars in these SN sites, to constrain the reddening and SN progenitor masses. We will provide statistics on the light echoes around SNe, an important clue to their progenitor systems. We also propose to image several "SN impostors" -- faint SNe IIn with massive progenitors -- to verify whether they are indeed superoutbursts of luminous blue variables and survived the explosions, or a new/weak class of massive star explosions. Finally, the data will add multi-filter, deep images of many nearby galaxies to the HST archive for future studies such as galaxy morphology, stellar populations, SN progenitors, and variable stars. We wish to obtain WFC3 images of the sites of nearby, recent SNe discovered or monitored by LOSS. Most of the objects are core-collapse SNe, which have massive, short-lived progenitors (making it also possible to study individual stars in their local environment), but several SNe Ia will also be imaged to obtain late-time measurements in crowded environments and provide statistics on light echoes. The use of standard wide bands will permit direct comparisons with other HST observations. Although there are tradeoffs, we feel that WFC3 is superior to ACS for our purposes, due to its higher resolution and, more importantly, shorter overhead time for the relatively brief snapshot visits. Note that a substantial part of the host galaxies of the SNe will be imaged with WFC3, and the data can be used for many other studies, such as galaxy morphology, stellar populations, variable stars, star clusters, H II regions, and the search for future SN progenitors. We will adjust the pointing coordinates of the telescope to make sure the SN sites and the maximum portion of their host galaxies are imaged. Accurate astrometry will generally be needed in order to locate the faint SN in its environment. This requires imposing an independent reference grid onto the WFC3 image, using stars that have been measured in deep, ground-based images and tied to the USNO B1 systems. We have access to telescopes at the Lick, Palomar, CFHT, Gemini, Magellan, and Keck Observatories, where we have been obtaining such images of each SN field. We have verified in previous studies that the number of stars typically visible in the HST and ground-based images is sufficient for our purposes. Given our desire to go fairly deep, and the advantage of having some color information for SNe (and their environments), the use of at least two filters is deemed necessary, and we choose F555W (V ) and F814W (I) filters for our proposed visits. The F814W filter is sensitive to massive, evolved stars in the neighborhood of core-collapse SNe, and provides constraints on the possible circumstellar material interaction and dust formation around SNe, while the F555W filter provides color information for the SNe and the stellar content of the environment, and is also more sensitive to possible light echoes. The CR-SPLIT exposures will be dithered, as requested (Call for Proposals, Sec. 4.1.7), to improve data quality. For a single visit to be ~35 minutes long (the peak of the distribution of snapshot visits has historically been around 30-35 minutes, according to the HST Snapshot document at http://www.stsci.edu/hst/HST overview/documents/), there can be only one filter change and only one CR-SPLIT pair of WFC3 exposures through each filter. Due to a severe overhead of 5.8 min for any short (< 339 s) exposures among the first three exposures in a visit, we design a visit with the first pair of exposures having 340 s integration each, while the second pair of exposures have 340 s and 170 s integrations (the last short exposure does not impose the 5.8 min overhead penalty). This yields a total visit time of 2114 s = 35.2 minutes. We have verified with existing HST data that uneven integration times (by a factor of 2) in a dithered CR-SPLIT exposure do not pose problems for cosmic-ray removal. The long pair of exposures (totalling 680 s) is used for the F814W filter because it has less sensitivity than the F555W filter. For the total exposure times of 510 s in F555W and 680 s in F814W per visit, we find using the WFC3 exposure time calculator that, from our detection, as part of our Snapshot program GO-10272, of SN Ia 2003gs in NGC 936 (distance modulus mu ~= 31.6 mag) on day ~440 at V = 23.7 and I = 22.5 mag, the SNe Ia in our sample (at comparable ages and distances, < mu >~ 31.7 mag) will be easily detected at signal-to-noise ratios (S/N) of ~46 (V ) and ~35 (I). These S/N will, of course, be lower for the SNe Ia that are somewhat more distant and/or older at the time of the observations. We consider the SNe Ia as the benchmark for our S/N estimation, since many of the SNe II and Ib/c may be more luminous at late times than radioactive decay would predict, due to circumstellar interaction. We may be able to use the resolved stellar environments around the core-collapse SNe to constrain the age and mass of the SN progenitor. In Figure 3 we show the color-magnitude diagram derived from observations of the SN II 2005af environment (Mu = 27.9 and AV =~ 0.6 mag) as part of our Snapshot program GO-10877, in which we detect red supergiants (RSGs) at V =~ 24 mag with initial mass ~12 solar mases. The SNe II in our proposed sample are at an average distance modulus < mu >~ 30.8 mag. We would detect similar RSGs in the environments of these SNe II (assuming AV =~ 0.1 mag) at S/N =~ 4(V ) and ~15(I). We have chosen 24 nearby SNe/SN impostors as the superset of targets for our snapshot study. We concentrate on the most recent ones (which have the highest probability of being detected in the HST images), as well as on long-lived SNe (as judged from their continually updated ground-based light curves). Our total request is 24 snapshots in 24 visits (at about 35 minutes per visit). Each visit will target one SN with the F555W and F814W filters. The specific list of 24 recent targets of interest is as follows; please consult the IAU CBETs for details: 2012Z, 2011ht, PSNJ12304185+4137498 (a "SN impostor"), 2011ek, 2011dh, NGC 4559-OT1, 2011by, 2011B, 2010jp, 2010io, 2010dn, 2010da, 2010br, 2010al, 2009ls, 2009ip, 2009ib, 2009dd, 2008in, 2007sv, 2006gy, 2006fp, 2005bf, 2001em. This list includes 4 SNe Ia, 4 SNe Ib/c, 10 SNe II/IIn, and 6 SN impostors. UNRESOLVED STELLAR POPULATIONS AND GALAXY STRUCTURE 0 false false 0.0 0.0 false false false SUPPORTED STAR SUPERNOVA TYPE IA This object was generated by the targetselector and retrieved from the SIMBAD database.This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR SUPERNOVA TYPE II This object was generated by the targetselector and retrieved from the SIMBAD database.This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR SUPERNOVA This object was generated by the targetselector and retrieved from the SIMBAD database.This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR SUPERNOVA TYPE IA This object was generated by the targetselector and retrieved from the SIMBAD database.This object was generated by the targetselector and retrieved from the SIMBAD database. 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J2000 J2000 STAR SUPERNOVA This object was generated by the targetselector and retrieved from the SIMBAD database.This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR SUPERNOVA TYPE II This object was generated by the targetselector and retrieved from the SIMBAD database.This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR SUPERNOVA This object was generated by the targetselector and retrieved from the SIMBAD database.This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR SUPERNOVA TYPE IB This object was generated by the targetselector and retrieved from the SIMBAD database.This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR SUPERNOVA This object was generated by the targetselector and retrieved from the SIMBAD database.This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR SUPERNOVA TYPE II This object was generated by the targetselector and retrieved from the SIMBAD database.This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR SUPERNOVA TYPE II This object was generated by the targetselector and retrieved from the SIMBAD database.This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W POS-TARG DITHER 0.145 LINE false false 2 46.84 WFC3-UVIS-DITHER-LINE 1 false The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 1361476502000 234.43907516920035 (Tic-Visit :proposal-id 13029 :visit-id "02" :proposal-version -1 :trans-version "20120604" :date "25-Jul-2012 22:08:37.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13029 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13029 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2324 :al-overhead-at-end 118 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3244 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13029 :visit-id "03" :proposal-version -1 :trans-version "20120604" :date "25-Jul-2012 22:08:38.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13029 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13029 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2285 :al-overhead-at-end 118 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3430 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 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(Tic-Visit :proposal-id 13029 :visit-id "05" :proposal-version -1 :trans-version "20120604" :date "25-Jul-2012 22:08:40.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13029 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13029 :visit-id "05" :orbit-number 1 :pcs-time 241 :si-vis-utilization 2285 :al-overhead-at-end 118 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 1362218779000 217.45273726639914 (Tic-Visit :proposal-id 13029 :visit-id "06" :proposal-version -1 :trans-version "20120604" :date "25-Jul-2012 22:08:41.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13029 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13029 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2285 :al-overhead-at-end 118 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3377 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 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CASM was run in Phase II mode. 1351918098000 261.45785666809604 (Tic-Visit :proposal-id 13029 :visit-id "09" :proposal-version -1 :trans-version "20120604" :date "25-Jul-2012 22:08:45.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13029 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13029 :visit-id "09" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2285 :al-overhead-at-end 118 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3623 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 1354623532000 331.429709943384 (Tic-Visit :proposal-id 13029 :visit-id "10" :proposal-version -1 :trans-version "20120604" :date "25-Jul-2012 22:08:46.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13029 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13029 :visit-id "10" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2324 :al-overhead-at-end 118 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3244 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 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CASM was run in Phase II mode. 1360872923000 99.6572197321043 (Tic-Visit :proposal-id 13029 :visit-id "14" :proposal-version -1 :trans-version "20120604" :date "25-Jul-2012 22:08:50.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13029 :visit-id "14" :obset-id "14" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13029 :visit-id "14" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2324 :al-overhead-at-end 118 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3244 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 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(Tic-Visit :proposal-id 13029 :visit-id "17" :proposal-version -1 :trans-version "20120604" :date "25-Jul-2012 22:08:54.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13029 :visit-id "17" :obset-id "17" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13029 :visit-id "17" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2285 :al-overhead-at-end 118 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3430 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13029 :visit-id "18" :proposal-version -1 :trans-version "20120604" :date "25-Jul-2012 22:08:55.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13029 :visit-id "18" :obset-id "18" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13029 :visit-id "18" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2285 :al-overhead-at-end 118 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13029 :visit-id "19" :proposal-version -1 :trans-version "20120604" :date "25-Jul-2012 22:08:56.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13029 :visit-id "19" :obset-id "19" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13029 :visit-id "19" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2285 :al-overhead-at-end 118 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3582 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 1355657074000 110.92884941214652 (Tic-Visit :proposal-id 13029 :visit-id "20" :proposal-version -1 :trans-version "20120604" :date "25-Jul-2012 22:08:58.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13029 :visit-id "20" :obset-id "20" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13029 :visit-id "20" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2324 :al-overhead-at-end 118 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 1361491394000 6.0905908332347 (Tic-Visit :proposal-id 13029 :visit-id "21" :proposal-version -1 :trans-version "20120604" :date "25-Jul-2012 22:08:59.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13029 :visit-id "21" :obset-id "21" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13029 :visit-id "21" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2324 :al-overhead-at-end 118 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3635 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 1358863286000 303.7163854817661 (Tic-Visit :proposal-id 13029 :visit-id "22" :proposal-version -1 :trans-version "20120604" :date "25-Jul-2012 22:09:00.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13029 :visit-id "22" :obset-id "22" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13029 :visit-id "22" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2324 :al-overhead-at-end 118 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 1357465315000 47.13070512757389 (Tic-Visit :proposal-id 13029 :visit-id "23" :proposal-version -1 :trans-version "20120604" :date "25-Jul-2012 22:09:01.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13029 :visit-id "23" :obset-id "23" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13029 :visit-id "23" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2324 :al-overhead-at-end 118 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13029 :visit-id "24" :proposal-version -1 :trans-version "20120604" :date "25-Jul-2012 22:09:02.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13029 :visit-id "24" :obset-id "24" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13029 :visit-id "24" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2285 :al-overhead-at-end 118 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3511 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13029 :visit-id "25" :proposal-version -1 :trans-version "20130502" :date "23-Jul-2013 17:57:11.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13029 :visit-id "25" :obset-id "25" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13029 :visit-id "25" :orbit-number 1 :pcs-time 241 :si-vis-utilization 2328 :al-overhead-at-end 125 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3233 :pcs-gap 0 ) true 1 0