14154( 8) - 25-Sep-2015 12:32:20 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14154 Version: 8 Check-in Time: 25-Sep-2015 12:32:20 STScI Edit Number: 2 Title First imaging polarization study of Fomalhaut's 140 AU dust belt ------------------------------------------------------------------------------------ Type Cycle GO 23 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Paul Kalas University of California - Berkeley Y CoI: Dr. Gaspard Duchene University of California - Berkeley N CoI: Dr. James R. Graham University of California - Berkeley N CoI: Dr. Michael P. Fitzgerald University of California - Los Angeles N CoI: Dr. Mark Clampin NASA Goddard Space Flight Center N ------------------------------------------------------------------------------------ Abstract As one of the nearest exoplanetary systems with multiple dust structures and a candidate extrasolar planet on a highly eccentric orbit, Fomalhaut draws significant attention from observers and theorists alike. However, there is an unresolved debate concerning the fundamental 3D geometry of the system. This strongly impacts our knowledge of grain properties, such as the size distribution, and the question of spin-orbit alignment between the star, the dust belt, and Fomalhaut b. Here we propose the first optical polarization study of Fomalhaut's 140 AU dust belt, which is made feasible by the high-contrast, diffraction-limited imaging capability of ACS/WFC. As demonstrated with another dust belt system, HR 4796A, determining the Stokes parameters is a crucial diagnostic for scattering geometry and dust grain properties. Measuring the grain optical properties through polarization will not only resolve the spin-orbit debate for Fomalhaut, it will also permit a quantitative comparison to other dusty systems, from the primitive porous aggregates that comprise AU Mic's debris disk, to the highly processed interplanetary dust particles in our own solar system. ------------------------------------------------------------------------------------ Observations Description ------------------------ These observations will obtain wide-field, high-contrast polarimetric imaging of Fomalhaut's dust belt. Our observing technique was validated in GO-9861 (PI Kalas). The bright star Beta Pictoris was placed near the 50 pixel wide WFC chip gap, and we obtained images at three roll angles (one orbit per angle, or ORIENT). We use the roll subtraction to estimate and subtract the stellar PSF. The absence of a coronagraph means that diffraction spikes and a bright pupil ghost dominate large portions of the field. The 14154 observations require specific spacecraft ORIENTs such that the pupil ghost does not overlap with the Fomalhaut's dust belt. Due to the ORIENT and sequence constraints, the scheduling windows are very few and very brief. We find a single opportunity in 2015 on October 11-12. Visit 01 has the first ORIENT for Fomalhaut, and Visit 02 and 03 are SAME AS Visit 01. Then Visit 04 has the PSF reference star Vega. A sequence of orbits is specified so that Visits 01, 02, 03, 04 are executed consecutively. We need 14154( 8) - 25-Sep-2015 12:32:20 - [ 2] consecutive orbits to achieve PSF stability that is required for successful PSF subtraction. Ideally we would also have Visits 05, 06, 07 in the sequence, but a sequence of 7 orbits is difficult to schedule. Therefore for scheduling flexibility, we specify that Visit 05 should occur very soon after Visit 04, but it is not part of the Visit 01-04 sequence. However, Visits 05, 06, 07 have their own sequence so that they are executed consecutively in three orbits with no interruptions. The default aperture for a POL observation is pixel 3096, 1024 on the WFC1 chip. This is the right half of the WFC1 chip and only half is necessary because of the 35" radius vignetting with POL observations. The default is to have a 2048x2048 subarray on WFC1. However, we want to place the star on the chip gap to mitigate saturation. Therefore we DO NOT want the default aperture and subarray for POL observations. We therefore specify for every exposure in every orbit a POS-TARG of x=0 arcsec, y=-11.25 arcsec from the WFC aperture (reference pixel 2072, 200 on WFC1). This appears to be an allowed configuration in the APT and this should move the targets to the middle of the chip gap. CALIBRATION ORBITS: As per STScI policy, 4 internal orbits have been added to this proposal for the purpose of obtaining subarray bias frames that are contemporaneous with the science observations. These internal orbits will be charged to STScI's Cycle 23 ACS Calibration Program, not to GO 14154. The ACS Instrument Team at STScI is responsible for producing superbias reference files from the bias frames obtained in this GO proposal. ------------------------------------------------------------------------------------ 14154( 8) - 25-Sep-2015 12:32:20 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 FOMALHAUT STAR, A0-A3 V-IV, RA=22H57M39.0463S +/- 0.1", J2000 V = 1.16 CIRCUMSTELLAR MATTER, DEC=-29D37'20.05" +/- 0.1" EXTRA-SOLAR PLANETARY SYSTEM Reference Frame: Other: SIMBAD Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 0.0252271023450455 -0.16466999999999998 0.12981 ------------------------------------------------------------------------------------------------------------------------------------ 2 VEGA STAR, A0-A3 V-IV RA=18H36M56.3364S +/- 0.1", J2000 V = 0.03 DEC=+38D47'1.28" +/- 0.1" Reference Frame: Other: SIMBAD Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 0.01718501552262967 0.28623000000000004 0.13023 ------------------------------------------------------------------------------------------------------------------------------------ 14154( 8) - 25-Sep-2015 12:32:20 - [ 4] Visit: 01 Visit Requirements: ORIENT 25D TO 27 D; AFTER 04 BY 0 Orbits TO 2 Orbits; SEQ 01, 02, 03, 05, 06, 07 WITHIN 6 Orbits On Hold Comments: Additional Comments: 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 FOMALHAUT ACS/WFC ACCUM WFC F606W, CR-SPLIT=8, GAIN=2.0 1 1272 S POL0V (1272 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 | ------------------------------------------------------------------------------------------------------------------------------------ FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 1 1 N/A POL0V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 2 1 N/A POL0V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 3 1 N/A POL0V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 4 1 N/A POL0V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 5 1 N/A POL0V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 6 1 N/A POL0V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 7 1 N/A POL0V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 8 1 N/A POL0V 14154( 8) - 25-Sep-2015 12:32:20 - [ 5] Visit: 02 Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: 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 FOMALHAUT ACS/WFC ACCUM WFC F606W, CR-SPLIT=8, GAIN=2.0 1 1272 S POS TARG 0, 0 POL60V (1272 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 | ------------------------------------------------------------------------------------------------------------------------------------ FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 1 1 N/A POL60V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 2 1 N/A POL60V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 3 1 N/A POL60V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 4 1 N/A POL60V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 5 1 N/A POL60V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 6 1 N/A POL60V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 7 1 N/A POL60V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 8 1 N/A POL60V 14154( 8) - 25-Sep-2015 12:32:20 - [ 6] Visit: 03 Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: 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 FOMALHAUT ACS/WFC ACCUM WFC F606W, CR-SPLIT=8, GAIN=2.0 1 1272 S POS TARG 0, 0 POL120V (1272 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 | ------------------------------------------------------------------------------------------------------------------------------------ FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 1 1 N/A POL120V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 2 1 N/A POL120V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 3 1 N/A POL120V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 4 1 N/A POL120V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 5 1 N/A POL120V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 6 1 N/A POL120V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 7 1 N/A POL120V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 8 1 N/A POL120V 14154( 8) - 25-Sep-2015 12:32:20 - [ 7] Visit: 04 Visit Requirements: On Hold Comments: Additional Comments: 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 VEGA ACS/WFC ACCUM WFC F606W, CR-SPLIT=3, GAIN=2.0 1 120 S (120 POS TARG 0, 0 POL0V S) ------------------------------------------------------------------------------------------------------------------------------------ 2 VEGA ACS/WFC ACCUM WFC F606W, CR-SPLIT=3, GAIN=2.0 1 120 S (120 POL60V S) ------------------------------------------------------------------------------------------------------------------------------------ 3 VEGA ACS/WFC ACCUM WFC F606W, CR-SPLIT=3, GAIN=2.0 1 120 S (120 POL120V 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 | ------------------------------------------------------------------------------------------------------------------------------------ VEGA 1 ACS/WFC ACCUM WFC F606W, none none none 1 1 N/A POL0V VEGA 1 ACS/WFC ACCUM WFC F606W, none none none 2 1 N/A POL0V VEGA 1 ACS/WFC ACCUM WFC F606W, none none none 3 1 N/A POL0V VEGA 2 ACS/WFC ACCUM WFC F606W, none none none 1 1 N/A POL60V VEGA 2 ACS/WFC ACCUM WFC F606W, none none none 2 1 N/A POL60V VEGA 2 ACS/WFC ACCUM WFC F606W, none none none 3 1 N/A POL60V VEGA 3 ACS/WFC ACCUM WFC F606W, none none none 1 1 N/A POL120V VEGA 3 ACS/WFC ACCUM WFC F606W, none none none 2 1 N/A POL120V VEGA 3 ACS/WFC ACCUM WFC F606W, none none none 3 1 N/A POL120V 14154( 8) - 25-Sep-2015 12:32:20 - [ 8] Visit: 05 Visit Requirements: ORIENT 17D TO 17.1D FROM 01 On Hold Comments: Additional Comments: 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 FOMALHAUT ACS/WFC ACCUM WFC F606W, CR-SPLIT=8, GAIN=2.0 1 1272 S POS TARG 0, 0 POL0V (1272 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 | ------------------------------------------------------------------------------------------------------------------------------------ FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 1 1 N/A POL0V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 2 1 N/A POL0V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 3 1 N/A POL0V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 4 1 N/A POL0V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 5 1 N/A POL0V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 6 1 N/A POL0V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 7 1 N/A POL0V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 8 1 N/A POL0V 14154( 8) - 25-Sep-2015 12:32:20 - [ 9] Visit: 06 Visit Requirements: SAME ORIENT AS 05 On Hold Comments: Additional Comments: 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 FOMALHAUT ACS/WFC ACCUM WFC F606W, CR-SPLIT=8, GAIN=2.0 1 1272 S POS TARG 0, 0 POL60V (1272 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 | ------------------------------------------------------------------------------------------------------------------------------------ FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 1 1 N/A POL60V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 2 1 N/A POL60V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 3 1 N/A POL60V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 4 1 N/A POL60V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 5 1 N/A POL60V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 6 1 N/A POL60V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 7 1 N/A POL60V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 8 1 N/A POL60V 14154( 8) - 25-Sep-2015 12:32:20 - [ 10] Visit: 07 Visit Requirements: SAME ORIENT AS 05 On Hold Comments: Additional Comments: 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 FOMALHAUT ACS/WFC ACCUM WFC F606W, CR-SPLIT=8, GAIN=2.0 1 1272 S POS TARG 0, 0 POL120V (1272 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 | ------------------------------------------------------------------------------------------------------------------------------------ FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 1 1 N/A POL120V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 2 1 N/A POL120V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 3 1 N/A POL120V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 4 1 N/A POL120V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 5 1 N/A POL120V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 6 1 N/A POL120V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 7 1 N/A POL120V FOMALHAUT 1 ACS/WFC ACCUM WFC F606W, none none none 8 1 N/A POL120V 14154( 8) - 25-Sep-2015 12:32:20 - [ 11] Visit: A1 Visit Requirements: SEQ A1, A2, A3, A4 WITHIN 1 D On Hold Comments: Additional Comments: 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 BIAS ACS/WFC ACCUM WFC1-2K DEF GAIN=2.0, COMPRESSION=NONE 6 0 S (0 S) Comments: All visits should be done within one anneal cycle in order to not have to repeat the subarray bias observations. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 1 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 2 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 3 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 4 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 5 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 6 none 1 N/A 14154( 8) - 25-Sep-2015 12:32:20 - [ 12] Visit: A2 Visit Requirements: On Hold Comments: Additional Comments: 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 BIAS ACS/WFC ACCUM WFC1-2K DEF GAIN=2.0, COMPRESSION=NONE 6 0 S (0 S) Comments: All visits should be done within one anneal cycle in order to not have to repeat the subarray bias observations. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 1 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 2 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 3 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 4 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 5 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 6 none 1 N/A 14154( 8) - 25-Sep-2015 12:32:20 - [ 13] Visit: A3 Visit Requirements: On Hold Comments: Additional Comments: 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 BIAS ACS/WFC ACCUM WFC1-2K DEF GAIN=2.0, COMPRESSION=NONE 6 0 S (0 S) Comments: All visits should be done within one anneal cycle in order to not have to repeat the subarray bias observations. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 1 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 2 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 3 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 4 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 5 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 6 none 1 N/A 14154( 8) - 25-Sep-2015 12:32:20 - [ 14] Visit: A4 Visit Requirements: GROUP A4, 01, 02, 03, 04, 05, 06, 07 WITHIN 14D On Hold Comments: Additional Comments: 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 BIAS ACS/WFC ACCUM WFC1-2K DEF GAIN=2.0, COMPRESSION=NONE 6 0 S (0 S) Comments: All visits should be done within one anneal cycle in order to not have to repeat the subarray bias observations. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 1 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 2 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 3 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 4 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 5 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 6 none 1 N/A 14154( 8) - 25-Sep-2015 12:32:20 - [ 15] Summary Form for Proposal 14154 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFC, WFC1-2K ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters COMPRESSION=NONE, CR-SPLIT=3, CR-SPLIT=8, GAIN=2.0 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 04 BY 0 Orbits TO 2 Orbits, GROUP A4, 01, 02, 03, 04, 05, 06, 07 WITHIN 14D, ORIENT 17D TO 17.1D FROM 01, ORIENT 25D TO 27 D, POS TARG 0, 0, SAME ORIENT AS 01, SAME ORIENT AS 05, SEQ 01, 02, 03, 05, 06, 07 WITHIN 6 Orbits, SEQ A1, A2, A3, A4 WITHIN 1 D ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements DEF, F606W, POL0V, POL120V, POL60V ------------------------------------------------------------------------------------------------------------------------------------ Target Names BIAS, FOMALHAUT, VEGA ------------------------------------------------------------------------------------------------------------------------------------