15421( 7) - 04-Dec-2017 12:25:14 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15421 Version: 7 Check-in Time: 04-Dec-2017 12:25:14 STScI Edit Number: 5 Title The Nucleus of comet 41P/Tuttle-Giacobini-Kresak ------------------------------------------------------------------------------------ Type Cycle GO 25 ------------------------------------------------------------------------------------ Investigators Contact? PI: Tony L. Farnham University of Maryland Y CoI: Dr. Dennis Bodewits University of Maryland N CoI: Dr. James M. Bauer University of Maryland N CoI: Dr. David Schleicher Lowell Observatory N CoI: Nora Eisner University of Sheffield N CoI: Dr. Matthew M Knight University of Maryland N ------------------------------------------------------------------------------------ Abstract Comet 41P/Tuttle-Giacobini-Kresak is undergoing an unprecedented spindown of its nucleus, with its rotation period more than doubling from 20 to 42+ hours in a two month period. No other comet has been observed to exhibit this magnitude of change in its dynamic state, suggesting that 41P has a distinct alignment of its activity that generates highly efficient torques on the nucleus. Its rapid evolution presents us with a unique opportunity for testing models of cometary dynamics. Unfortunately, little information currently exists about the nucleus itself, which limits our ability to quantify the forces involved. We are requesting 10 HST orbits, spanning a 7-day window, to observe the comet's lightcurve. We will use this lightcurve to characterize the nucleus' size and shape and determine its current rotation period. We will use the F350LP filter to maximize the S/N of our measurements, and we have developed an observation sampling strategy that optimizes the 10 orbits to provide an good coverage of lightcurves with any period between 2 and 7 days. Results derived from these observations will provide the knowledge needed for detailed analyses of the comet's torques and how they respond to changing production rates and illumination conditions. ------------------------------------------------------------------------------------ Observations Description ------------------------ We are attempting to define a comet nucleus lightcurve, so ideally we would like to spread our 10 orbits out at roughly equal intervals over the observing window. For the following we assume the window starts 11-Dec-2017:00:00:00 and ends 14-Dec-2017:11:39:00. (The start date is assumed to be the start of the upcoming SMS, and the end date, given by visit planner, is presumably defined by the time at which the comet enters the solar exclusion zone. If these are not the correct limits, then our window size and average interval may change a little.) The window is thus 3.48 days (83.5 hrs) long, and with 9 intervals between 10 visits, the average interval is ~9 hrs. 15421( 7) - 04-Dec-2017 12:25:14 - [ 2] Thus we would like to sample the lightcurve on average every 9 hours. In the timing requirements for the visits, we specify intervals of 6 to 12 hrs, and are willing to occasionally relax those limits even further to facilitate scheduling, as long as we obtain suitable coverage of the observing window. Each visit is identical and will consist of 7 images obtained with the WFC3/UVIS instrument in the 1kx1k subframe mode. The 7-image sequence repeated at each visit: F350LP 160 sec F475W 400 sec F625W 340 sec (dither) F350LP 160 sec F475W 400 sec F625W 340 sec (dither) F350LP 160 sec ------------------------------------------------------------------------------------ 15421( 7) - 04-Dec-2017 12:25:14 - [ 3] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 TARGET NAME: 41P ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: COMET Comet 41P/Tuttle-Giacobini-Kresak ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 TYPE=COMET, Q=1.045042734323105, E=0.6612507057941893, I=9.229131575306448, O=141.0662859883997, W=62.15858593106646, T=12-APR-2017:18:03:14, TTimeScale=TDB, EQUINOX=J2000, EPOCH=01-APR-2017:00:00:00, EpochTimeScale=TDB, A1=1.745203733444E-8, A2=4.275330603123E-9, A3=1.473430991173E-9 ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 24.5 +/- 1. Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ 15421( 7) - 04-Dec-2017 12:25:14 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.145 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 15421( 7) - 04-Dec-2017 12:25:14 - [ 5] Visit: 01 (41P lightcurve point) Visit Requirements: AFTER 11-DEC-2017:00:00:00 On Hold Comments: Additional Comments: Timing Requirements: To clarify, we are trying to define a lightcurve, so we would like to space our 10 orbits at roughly equal intervals through the observing window, if possible. Assuming the window start time is 11-Dec-2017:00:00:00 and the end time is 14-Dec-2017:11:39:00 (according to the visit planner - presumably defined by the time at which the comet enters the solar exclusion zone) then the intervals would be an average of ~9 hrs. In the requirements below, we specify intervals of 6 to 12 hrs (and are willing to relax that even further to facilitate scheduling) but would like to span the majority of the observing window. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (320 PATTERN 2 1-3 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 2 41P WFC3/UVI ACCUM UVIS2-C1K F475W FLASH=4 1 400 S (800 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 41P WFC3/UVI ACCUM UVIS2-C1K F625W FLASH=2 1 340 S (680 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 4 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (160 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 1 none none none 1 N/A S K1C-SUB 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 2 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 1 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 2 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 1 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 2 none none none 1 N/A S K1C-SUB 41P 4 WFC3/UVI ACCUM UVIS2-C1 F350LP none none none none 1 N/A S K1C-SUB 15421( 7) - 04-Dec-2017 12:25:14 - [ 6] Visit: 02 (41P lightcurve point) Visit Requirements: AFTER 01 BY 0.25 D TO 0.5 D On Hold Comments: Additional Comments: Timing Requirements: To clarify, we are trying to define a lightcurve, so we would like to space our 10 orbits at roughly equal intervals through the observing window, if possible. Assuming the window start time is 11-Dec-2017:00:00:00 and the end time is 14-Dec-2017:11:39:00 (according to the visit planner - presumably defined by the time at which the comet enters the solar exclusion zone) then the intervals would be an average of ~9 hrs. In the requirements below, we specify intervals of 6 to 12 hrs (and are willing to relax that even further to facilitate scheduling) but would like to span the majority of the observing window. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (320 PATTERN 2 1-3 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 2 41P WFC3/UVI ACCUM UVIS2-C1K F475W FLASH=4 1 400 S (800 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 41P WFC3/UVI ACCUM UVIS2-C1K F625W FLASH=2 1 340 S (680 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 4 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (160 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 1 none none none 1 N/A S K1C-SUB 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 2 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 1 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 2 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 1 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 2 none none none 1 N/A S K1C-SUB 41P 4 WFC3/UVI ACCUM UVIS2-C1 F350LP none none none none 1 N/A S K1C-SUB 15421( 7) - 04-Dec-2017 12:25:14 - [ 7] Visit: 03 (41P lightcurve point) Visit Requirements: AFTER 02 BY 0.25 D TO 0.5 D On Hold Comments: Additional Comments: Timing Requirements: To clarify, we are trying to define a lightcurve, so we would like to space our 10 orbits at roughly equal intervals through the observing window, if possible. Assuming the window start time is 11-Dec-2017:00:00:00 and the end time is 14-Dec-2017:11:39:00 (according to the visit planner - presumably defined by the time at which the comet enters the solar exclusion zone) then the intervals would be an average of ~9 hrs. In the requirements below, we specify intervals of 6 to 12 hrs (and are willing to relax that even further to facilitate scheduling) but would like to span the majority of the observing window. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (320 PATTERN 2 1-3 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 2 41P WFC3/UVI ACCUM UVIS2-C1K F475W FLASH=4 1 400 S (800 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 41P WFC3/UVI ACCUM UVIS2-C1K F625W FLASH=2 1 340 S (680 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 4 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (160 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 1 none none none 1 N/A S K1C-SUB 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 2 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 1 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 2 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 1 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 2 none none none 1 N/A S K1C-SUB 41P 4 WFC3/UVI ACCUM UVIS2-C1 F350LP none none none none 1 N/A S K1C-SUB 15421( 7) - 04-Dec-2017 12:25:14 - [ 8] Visit: 04 (41P lightcurve point) Visit Requirements: AFTER 03 BY 0.25 D TO 0.5 D On Hold Comments: Additional Comments: Timing Requirements: To clarify, we are trying to define a lightcurve, so we would like to space our 10 orbits at roughly equal intervals through the observing window, if possible. Assuming the window start time is 11-Dec-2017:00:00:00 and the end time is 14-Dec-2017:11:39:00 (according to the visit planner - presumably defined by the time at which the comet enters the solar exclusion zone) then the intervals would be an average of ~9 hrs. In the requirements below, we specify intervals of 6 to 12 hrs (and are willing to relax that even further to facilitate scheduling) but would like to span the majority of the observing window. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (320 PATTERN 2 1-3 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 2 41P WFC3/UVI ACCUM UVIS2-C1K F475W FLASH=4 1 400 S (800 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 41P WFC3/UVI ACCUM UVIS2-C1K F625W FLASH=2 1 340 S (680 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 4 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (160 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 1 none none none 1 N/A S K1C-SUB 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 2 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 1 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 2 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 1 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 2 none none none 1 N/A S K1C-SUB 41P 4 WFC3/UVI ACCUM UVIS2-C1 F350LP none none none none 1 N/A S K1C-SUB 15421( 7) - 04-Dec-2017 12:25:14 - [ 9] Visit: 05 (41P lightcurve point) Visit Requirements: AFTER 04 BY 0.25 D TO 0.5 D On Hold Comments: Additional Comments: Timing Requirements: To clarify, we are trying to define a lightcurve, so we would like to space our 10 orbits at roughly equal intervals through the observing window, if possible. Assuming the window start time is 11-Dec-2017:00:00:00 and the end time is 14-Dec-2017:11:39:00 (according to the visit planner - presumably defined by the time at which the comet enters the solar exclusion zone) then the intervals would be an average of ~9 hrs. In the requirements below, we specify intervals of 6 to 12 hrs (and are willing to relax that even further to facilitate scheduling) but would like to span the majority of the observing window. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (320 PATTERN 2 1-3 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 2 41P WFC3/UVI ACCUM UVIS2-C1K F475W FLASH=4 1 400 S (800 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 41P WFC3/UVI ACCUM UVIS2-C1K F625W FLASH=2 1 340 S (680 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 4 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (160 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 1 none none none 1 N/A S K1C-SUB 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 2 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 1 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 2 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 1 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 2 none none none 1 N/A S K1C-SUB 41P 4 WFC3/UVI ACCUM UVIS2-C1 F350LP none none none none 1 N/A S K1C-SUB 15421( 7) - 04-Dec-2017 12:25:14 - [ 10] Visit: 06 (41P lightcurve point) Visit Requirements: AFTER 05 BY 0.25 D TO 0.5 D On Hold Comments: Additional Comments: Timing Requirements: To clarify, we are trying to define a lightcurve, so we would like to space our 10 orbits at roughly equal intervals through the observing window, if possible. Assuming the window start time is 11-Dec-2017:00:00:00 and the end time is 14-Dec-2017:11:39:00 (according to the visit planner - presumably defined by the time at which the comet enters the solar exclusion zone) then the intervals would be an average of ~9 hrs. In the requirements below, we specify intervals of 6 to 12 hrs (and are willing to relax that even further to facilitate scheduling) but would like to span the majority of the observing window. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (320 PATTERN 2 1-3 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 2 41P WFC3/UVI ACCUM UVIS2-C1K F475W FLASH=4 1 400 S (800 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 41P WFC3/UVI ACCUM UVIS2-C1K F625W FLASH=2 1 340 S (680 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 4 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (160 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 1 none none none 1 N/A S K1C-SUB 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 2 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 1 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 2 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 1 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 2 none none none 1 N/A S K1C-SUB 41P 4 WFC3/UVI ACCUM UVIS2-C1 F350LP none none none none 1 N/A S K1C-SUB 15421( 7) - 04-Dec-2017 12:25:14 - [ 11] Visit: 07 (41P lightcurve point) Visit Requirements: AFTER 06 BY 0.25 D TO 0.5 D On Hold Comments: Additional Comments: Timing Requirements: To clarify, we are trying to define a lightcurve, so we would like to space our 10 orbits at roughly equal intervals through the observing window, if possible. Assuming the window start time is 11-Dec-2017:00:00:00 and the end time is 14-Dec-2017:11:39:00 (according to the visit planner - presumably defined by the time at which the comet enters the solar exclusion zone) then the intervals would be an average of ~9 hrs. In the requirements below, we specify intervals of 6 to 12 hrs (and are willing to relax that even further to facilitate scheduling) but would like to span the majority of the observing window. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (320 PATTERN 2 1-3 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 2 41P WFC3/UVI ACCUM UVIS2-C1K F475W FLASH=4 1 400 S (800 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 41P WFC3/UVI ACCUM UVIS2-C1K F625W FLASH=2 1 340 S (680 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 4 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (160 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 1 none none none 1 N/A S K1C-SUB 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 2 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 1 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 2 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 1 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 2 none none none 1 N/A S K1C-SUB 41P 4 WFC3/UVI ACCUM UVIS2-C1 F350LP none none none none 1 N/A S K1C-SUB 15421( 7) - 04-Dec-2017 12:25:14 - [ 12] Visit: 08 (41P lightcurve point) Visit Requirements: AFTER 07 BY 0.25 D TO 0.5 D On Hold Comments: Additional Comments: Timing Requirements: To clarify, we are trying to define a lightcurve, so we would like to space our 10 orbits at roughly equal intervals through the observing window, if possible. Assuming the window start time is 11-Dec-2017:00:00:00 and the end time is 14-Dec-2017:11:39:00 (according to the visit planner - presumably defined by the time at which the comet enters the solar exclusion zone) then the intervals would be an average of ~9 hrs. In the requirements below, we specify intervals of 6 to 12 hrs (and are willing to relax that even further to facilitate scheduling) but would like to span the majority of the observing window. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (320 PATTERN 2 1-3 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 2 41P WFC3/UVI ACCUM UVIS2-C1K F475W FLASH=4 1 400 S (800 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 41P WFC3/UVI ACCUM UVIS2-C1K F625W FLASH=2 1 340 S (680 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 4 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (160 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 1 none none none 1 N/A S K1C-SUB 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 2 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 1 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 2 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 1 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 2 none none none 1 N/A S K1C-SUB 41P 4 WFC3/UVI ACCUM UVIS2-C1 F350LP none none none none 1 N/A S K1C-SUB 15421( 7) - 04-Dec-2017 12:25:14 - [ 13] Visit: 09 (41P lightcurve point) Visit Requirements: AFTER 11-DEC-2017:00:00:00; AFTER 08 BY 0.25 D TO 0.5 D On Hold Comments: Additional Comments: Timing Requirements: To clarify, we are trying to define a lightcurve, so we would like to space our 10 orbits at roughly equal intervals through the observing window, if possible. Assuming the window start time is 11-Dec-2017:00:00:00 and the end time is 14-Dec-2017:11:39:00 (according to the visit planner - presumably defined by the time at which the comet enters the solar exclusion zone) then the intervals would be an average of ~9 hrs. In the requirements below, we specify intervals of 6 to 12 hrs (and are willing to relax that even further to facilitate scheduling) but would like to span the majority of the observing window. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (320 PATTERN 2 1-3 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 2 41P WFC3/UVI ACCUM UVIS2-C1K F475W FLASH=4 1 400 S (800 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 41P WFC3/UVI ACCUM UVIS2-C1K F625W FLASH=2 1 340 S (680 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 4 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (160 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 1 none none none 1 N/A S K1C-SUB 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 2 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 1 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 2 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 1 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 2 none none none 1 N/A S K1C-SUB 41P 4 WFC3/UVI ACCUM UVIS2-C1 F350LP none none none none 1 N/A S K1C-SUB 15421( 7) - 04-Dec-2017 12:25:14 - [ 14] Visit: 10 (41P lightcurve point) Visit Requirements: AFTER 09 BY 0.25 D TO 0.5 D; BEFORE 14-DEC-2017:11:39:00 On Hold Comments: Additional Comments: Timing Requirements: To clarify, we are trying to define a lightcurve, so we would like to space our 10 orbits at roughly equal intervals through the observing window, if possible. Assuming the window start time is 11-Dec-2017:00:00:00 and the end time is 14-Dec-2017:11:39:00 (according to the visit planner - presumably defined by the time at which the comet enters the solar exclusion zone) then the intervals would be an average of ~9 hrs. In the requirements below, we specify intervals of 6 to 12 hrs (and are willing to relax that even further to facilitate scheduling) but would like to span the majority of the observing window. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (320 PATTERN 2 1-3 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 2 41P WFC3/UVI ACCUM UVIS2-C1K F475W FLASH=4 1 400 S (800 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 41P WFC3/UVI ACCUM UVIS2-C1K F625W FLASH=2 1 340 S (680 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 4 41P WFC3/UVI ACCUM UVIS2-C1K F350LP 1 160 S (160 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 1 none none none 1 N/A S K1C-SUB 41P 1 WFC3/UVI ACCUM UVIS2-C1 F350LP 2 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 1 none none none 1 N/A S K1C-SUB 41P 2 WFC3/UVI ACCUM UVIS2-C1 F475W 2 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 1 none none none 1 N/A S K1C-SUB 41P 3 WFC3/UVI ACCUM UVIS2-C1 F625W 2 none none none 1 N/A S K1C-SUB 41P 4 WFC3/UVI ACCUM UVIS2-C1 F350LP none none none none 1 N/A S K1C-SUB 15421( 7) - 04-Dec-2017 12:25:14 - [ 15] Summary Form for Proposal 15421 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS2-C1K1C-SUB ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=2, FLASH=4 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 0.25 D TO 0.5 D, AFTER 02 BY 0.25 D TO 0.5 D, AFTER 03 BY 0.25 D TO 0.5 D, AFTER 04 BY 0.25 D TO 0.5 D, AFTER 05 BY 0.25 D TO 0.5 D, AFTER 06 BY 0.25 D TO 0.5 D, AFTER 07 BY 0.25 D TO 0.5 D, AFTER 08 BY 0.25 D TO 0.5 D, AFTER 09 BY 0.25 D TO 0.5 D, AFTER 11-DEC-2017:00:00:00, BEFORE 14-DEC-2017:11:39:00, PATTERN 2 1-3 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F350LP, F475W, F625W ------------------------------------------------------------------------------------------------------------------------------------ Target Names 41P ------------------------------------------------------------------------------------------------------------------------------------