0 Assigned ID: 438 ----- Attempting Submission 1 (Fri Mar 06 10:25:07 GMT 2020) ----- HST Phase I Proposal 438 successfully submitted. Receipt: # 438-1 ----- Attempting Submission 2 (Fri Mar 06 17:48:52 GMT 2020) ----- HST Phase I Proposal 438 successfully submitted. Receipt: # 438-2 ----- Attempting Submission 3 (Sat Mar 07 01:30:19 GMT 2020) ----- POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures. POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures. POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures. POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures. POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures. POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures. POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures. POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures. POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures. POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures. POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures. POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures. ORBITAL VISIBILITY OVERRUN ORBITAL VISIBILITY OVERRUN ORBITAL VISIBILITY OVERRUN FLASH level may be too low for this exposure or a short subexposure. See extended explanation in the diagnostic browser FLASH level may be too low for this exposure or a short subexposure. See extended explanation in the diagnostic browser FLASH level may be too low for this exposure or a short subexposure. See extended explanation in the diagnostic browser few bugs fixed in the dithering pattern for SBC, as well as target coordinates. *** resubmit 2020 Sept 30: identical apart from increased postflash on the UVIS observations (visit 18) Resubmission 04 May 2021: Visit 51 added and modified to repeat second orbit of visit 11, which failed. Resubmission 31 May 2021: Visit 52 added and modified to repeat first orbit of visit 12, which failed. Resubmission 26 Oct 2021: Visits 61 and 63 added and modified as repeats of visits 01 and 03, which failed. 873949837 ----- Attempting Submission 1 (Mon Jun 29 21:42:44 GMT 2020) ----- HST Phase II Proposal 16209 successfully submitted. Receipt: # 16209-1 ----- Attempting Submission 2 (Tue Jun 30 16:19:57 GMT 2020) ----- ----- Attempting Submission 3 (Wed Sep 30 18:17:23 GMT 2020) ----- Your proposal could not be saved. Submission aborted. ----- Attempting Submission 4 (Tue May 04 14:57:57 GMT 2021) ----- Your proposal could not be saved. Submission aborted. Your proposal could not be saved. Submission aborted. ----- Attempting Submission 5 (Mon May 31 09:13:22 GMT 2021) ----- ----- Attempting Submission 6 (Tue Oct 26 07:26:11 GMT 2021) ----- Resubmit 31 May 2021: the only modification since the last resubmission is the addition of visit 52. This visit does not suffer any errors/warnings. Resubmit 04 May 2021: the only modification since the last resubmission is the addition of visit 51. This visit does not suffer any errors/warnings. Warnings only. These relate to either: - POS-TARGs included with the rampfilter observations. POS-TARGs are small and the targets compact, so it doesn't matter. - problems with the UVIS post-flash in a few filters. These conflict with the ETC report, and even turning them up to the maximum does not remove the warning, which I do not understand.. Highly ionized gas in extreme starburst galaxies: high resolution He II and (the first) C IV emission imaging Nebular emission lines in the far ultraviolet are rapidly drawing attention as quantitative diagnostics of nebular gas. In the coming decades, they will be among the few information-carriers regarding the ionized ISM of faint galaxies at the highest redshifts. In particular, the C IV 1550 AA and He II 1640 AA lines are very prevalent in low-metallicity dwarf starbursts. However when using them to estimate the conditions in the ISM, C IV and He II diagnostics provide degenerate solutions between photo- and shock-ionization scenarios. Here we propose to obtain emission line images of two nearby starburst galaxies with the strongest emission in He II recombination line and C IV 1550 AA doublet. This will be the first C IV emission imaging ever performed. The targets are well-known low-metallicity starbursts, and analogs of galaxy building blocks at the highest redshifts. We will measure the C IV and He II light profile, and compute the total C IV (large-aperture) luminosity for the first time. Most importantly we will map line ratios involving C IV, He II, and H-alpha at ~20 pc resolution, while state-of-the-art modeling will derive the ionizing output of the star clusters. Hence we will directly couple stellar parameters to nebular diagnostics on the requisite spatial scales. Our results will determine the impact of photoionization and shocks to UV line diagnostics, which will be pivotal for understanding the ISM conditions of the earliest galaxies. The goal of this project is to take images of two low-redshift starburst galaxies in various filters. These targets are: 1. SBS 0335 -052E 2. J104457 For both targets we will obtain images in the SBC/F150LP and F165LP filters in order to isolate the CIV emission line at 1550 AA. These are split between 6 orbits (3x 2 visits) for target 1, and 4 orbits (2x 2 visits) for target 2. For both targets we will obtain a narrowband image of the He II 4686 line with the ACS/WFC/FR462N linear ramp filter. This is tuned to a wavelength of 4750 AA for target 1 and 4747 AA for target 2 because of slightly different redshifts. Two orbits are dedicated to this observation for each galaxy, and 3 exposures are obtained per orbit. For target 2 we will also obtain WFC3/UVIS imaging in five filters: F336W, F438W, F606W, F814W, and F665N. We obtain three images in each filter, split over 3 orbits and dithering between orbits. Throughout we have implemented our own sub-pixel dithering pattern using POS-TARGs. The number of post-flash electrons to add to the ACS ramp and UVIS imaging is calculated filter-by-filter using the imaging ETCs. All investigators are experts in observational studies of starburst galaxies, particularly focusing on nebular gas and its diagnostics. The team has significant experience of photoionization modeling of UV emission lines and also shock modeling (Berg, Scarlata, Stark, Wofford) that will be required for the interpretation of the data. The same four investigators have pioneered observational campaigns of the weak UV emission lines, in both the local universe and at the highest redshifts. All also have significant expertise in imaging and spectroscopy with Hubble, having led ~35 programs over the last decade. PI. M Hayes pioneered the use of ACS/SBC to image ultraviolet emission lines at low-redshift, starting with Ly-alpha (Hayes+2005, 2007, 2013, 2014). 15 refereed papers in total have been based on these methods, including a dedicated paper on the methods (M.H.+2009). C. Scarlata has developed software for the removal of dark current from SBC images. M.H. and J. Melinder also developed the software to produce Ly-alpha line-only images with pixel-SED fitting (the Lyman alpha eXtraction Software; LaXs), which we will apply in modified form for this study. The same methods have already been developed and applied to target other metal lines such as O VI 1032,1037 AA (Hayes+2016). A. Adamo and M. Messa are experts in the modeling of cluster/clump SEDs, and will provide estimates of the ionizing output of star clusters. Galaxies Intergalactic Medium and the Circumgalactic Medium 6 false false true false false false false false SUPPORTED GALAXY STARBURST This object was generated by the targetselector and retrieved from the NED database. J2000 J2000 GALAXY STARBURST J2000 J2000 FUV = 18.2 from GALEX ACS/SBC Imaging No No F150LP ACS/SBC Imaging No No F165LP ACS/WFC RampFilter No No FR462N ACS/SBC Imaging No No F150LP ACS/SBC Imaging No No F165LP ACS/WFC RampFilter No No FR462N WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F438W WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F665N The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. /tmp/OPVisit12734508089362969305.xml 1634691491000 297.935492170157 (Tic-Visit :proposal-id 16209 :visit-id "01" :proposal-version -1 :trans-version "20210514" :date "26-Oct-2021 09:21:51.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 148112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16209 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16209 :visit-id "01" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2761 :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 3145 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16209 :visit-id "01" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2752 :al-overhead-at-end 0 :internal-dur-at-end 198 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3145 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. /tmp/OPVisit952146417283193106.xml Partial repeat of failed visit 01 (Tic-Visit :proposal-id 16209 :visit-id "61" :proposal-version -1 :trans-version "20210514" :date "26-Oct-2021 09:21:52.0" :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 16209 :visit-id "61" :obset-id "61" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16209 :visit-id "61" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2761 :al-overhead-at-end 0 :internal-dur-at-end 117 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3145 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. /tmp/OPVisit16365824000743557685.xml 1634702931000 297.935492170157 (Tic-Visit :proposal-id 16209 :visit-id "02" :proposal-version -1 :trans-version "20210514" :date "26-Oct-2021 09:21:53.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 148112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16209 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16209 :visit-id "02" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2761 :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 3145 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16209 :visit-id "02" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2752 :al-overhead-at-end 0 :internal-dur-at-end 198 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3145 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. /tmp/OPVisit7668338914303708990.xml 1634788726000 298.7164646181336 (Tic-Visit :proposal-id 16209 :visit-id "03" :proposal-version -1 :trans-version "20210514" :date "26-Oct-2021 09:21:53.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 148112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16209 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16209 :visit-id "03" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2761 :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 3145 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16209 :visit-id "03" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2752 :al-overhead-at-end 0 :internal-dur-at-end 198 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3145 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. /tmp/OPVisit13761156536380009463.xml Partial repeat of failed visit 63 (Tic-Visit :proposal-id 16209 :visit-id "63" :proposal-version -1 :trans-version "20210514" :date "26-Oct-2021 09:21:54.0" :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 16209 :visit-id "63" :obset-id "63" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16209 :visit-id "63" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2761 :al-overhead-at-end 0 :internal-dur-at-end 117 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3145 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. /tmp/OPVisit8130961528447485925.xml 1612828780000 70.07455454820769 (Tic-Visit :proposal-id 16209 :visit-id "05" :proposal-version -1 :trans-version "20210514" :date "26-Oct-2021 09:21:54.0" :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 1705344 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16209 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16209 :visit-id "05" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2761 :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 3145 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16209 :visit-id "05" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2751 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3145 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. /tmp/OPVisit3551965736318788542.xml 1619630477000 113.18026471875328 (Tic-Visit :proposal-id 16209 :visit-id "11" :proposal-version -1 :trans-version "20210514" :date "26-Oct-2021 09:21:55.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 148112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16209 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16209 :visit-id "11" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2759 :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 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16209 :visit-id "11" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 198 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. /tmp/OPVisit4504951413168234538.xml (Tic-Visit :proposal-id 16209 :visit-id "51" :proposal-version -1 :trans-version "20210514" :date "26-Oct-2021 09:21:55.0" :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 16209 :visit-id "51" :obset-id "51" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16209 :visit-id "51" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2759 :al-overhead-at-end 0 :internal-dur-at-end 117 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. /tmp/OPVisit318638187100580852.xml 1621002878000 113.18026471875328 (Tic-Visit :proposal-id 16209 :visit-id "12" :proposal-version -1 :trans-version "20210514" :date "26-Oct-2021 09:21:56.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 148112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16209 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16209 :visit-id "12" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2759 :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 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16209 :visit-id "12" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 198 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. /tmp/OPVisit10865572118840607125.xml Single-orbit repeat of failed visit 12 (Tic-Visit :proposal-id 16209 :visit-id "52" :proposal-version -1 :trans-version "20210514" :date "26-Oct-2021 09:21:56.0" :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 16209 :visit-id "52" :obset-id "52" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16209 :visit-id "52" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2759 :al-overhead-at-end 0 :internal-dur-at-end 117 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. /tmp/OPVisit4667187229477879453.xml 1609421672000 295.774385472927 (Tic-Visit :proposal-id 16209 :visit-id "15" :proposal-version -1 :trans-version "20210514" :date "26-Oct-2021 09:21:57.0" :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 1705344 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16209 :visit-id "15" :obset-id "15" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16209 :visit-id "15" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2758 :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 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16209 :visit-id "15" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2748 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. /tmp/OPVisit1168805958006219660.xml 1618641022000 111.0 (Tic-Visit :proposal-id 16209 :visit-id "18" :proposal-version -1 :trans-version "20210514" :date "26-Oct-2021 09:21:58.0" :trans-errors '(:WARNINGS 3 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 4331232 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16209 :visit-id "18" :obset-id "18" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16209 :visit-id "18" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2773 :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 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16209 :visit-id "18" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2763 :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 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16209 :visit-id "18" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2763 :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 3142 :pcs-gap 0 ) true 3 3