15473( 6) - 10-Apr-2019 14:53:31 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15473 Version: 6 Check-in Time: 10-Apr-2019 14:53:31 STScI Edit Number: 4 Title WFC3-UVIS Eclipse Observation of WASP-43b: Helping James Webb See Through the Clouds ------------------------------------------------------------------------------------ Type Cycle GO 25 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Jonathan Fraine Space Telescope Science Institute Y CoI: Dr. Vivien Parmentier University of Oxford N CoI: Dr. Kevin B. Stevenson Space Telescope Science Institute N CoI: Prof. Nikole Lewis Cornell University N CoI: Giovanni Bruno INAF, Osservatorio Astrofisico di Catania N CoI: Dr. Tiffany Kataria Jet Propulsion Laboratory N CoI: Brian Kilpatrick Brown University N CoI: Dr. Caroline Morley University of Texas at Austin N CoI: Dr. Hannah Ruth Wakeford Space Telescope Science Institute N CoI: Prof. Jacob L. Bean University of Chicago N CoI: Dr. Kamen Todorov Universiteit van Amsterdam N CoI: Ms. Y Katherina Feng University of California - Santa Cruz N CoI: Prof. Jonathan Fortney University of California - Santa Cruz N CoI: Dr. Michael Line Arizona State University N CoI: Dr. Laura Kreidberg Harvard University N ------------------------------------------------------------------------------------ Abstract Observations of hot Jupiters have shown that aerosols (i.e. clouds/hazes) exist in their atmospheres, but their location and composition is not generally well known. WASP-43b is poised to become the most well characterized hot Jupiter to date, including several confirmed JWST GTO and ERS phase curve observations. However, previous observations of WASP-43b indicate that aerosol formation in its atmosphere could introduce degeneracy or spurious detections of gas phase chemistry - a major constrain on planet formation theories. In addition, optical reflectivity from these aerosols may be a dominant source of emission to constrain the total energy budget of this planet. Our proposed HST-UVIS observations will constrain the aerosol distribution and composition of WASP-43b, as well as provide essential context for interpreting the upcoming JWST-GTO and JWST-ERS results. ------------------------------------------------------------------------------------ Observations Description ------------------------ We consulted with the STScI WFC3 instrument team for instrumental capabilities and calibration tests. STScI ISR 2017-06 details several calibration observations that reconstructed the stellar flux to <1% predicted by the WFC3-UVIS ETC at STScI. In particular, we will be using "the round trip" scan observations (scan forward, then scan back) to mitigate the unconstrained drift in the scan process; a "round trip" scan returns the detector and FGS to the same location at the beginning of every image. We chose the F350LP filter because it minimized contribution from H2 scattering, maximizing the contrast between the cloudy and the cloudless 15473( 6) - 10-Apr-2019 14:53:31 - [ 2] atmosphere, and thus the SNR on the aerosol composition. We expect negligible thermal contribution. Moreover, any such thermal contribution is expeted to be anti-correlated with the reflected-light contributions and, therfore, distinguishable. The details of our WFC3-UVIS instrument configuration are as follows. Because the WASP-43 is moderately bright (Vmag = 12.4), we will operate in spatial scan mode with a scan rate of 0.15 arcsec s^-1 perpendicular to the read direction -- for 93.1 seconds or 360 pixels -- located 100 rows (YPOS: 6.08) from the readout edge of the detector. This will result in a maximum pixel brightness of <12, 500 DN (30, 000 e), with minimum read noise contribution. The total scan length will be 360 pixels, which affords the use of the 512x512 sub-array mode -- with an additional 75 pixels before and after the scan. We consulted the STScI WFC3 team for geometric parameters to maximize stability of the observation along the detector's physical rows. APT 25.4.4 determined that our observations will contain 19 frames per orbit (10 forward scan and 9 reverse scan) -- culminating in over 75 frames for the entire program. Using STScI's WFC3-UVIS ETC, we expected an SNR~7800 per frame -- coinciding with a photometric precision per frame of 128 ppm. ------------------------------------------------------------------------------------ 15473( 6) - 10-Apr-2019 14:53:31 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 WASP-43 STAR, EXTRA-SOLAR RA=10H19M38.0080S, J2000 V = 12.4 PLANET, EXTRA-SOLAR DEC=-09D48'22.59" PLANETARY SYSTEM, K V-IV Reference Frame: Other: SIMBAD Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 15473( 6) - 10-Apr-2019 14:53:31 - [ 4] Visit: 01 (WASP43 UVIS) Visit Requirements: SCHED 100%; ORIENT 100D TO 80 D; Period 0.813473978 D AND ZERO-PHASE HJD2455528.868634 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 WASP-43 WFC3/UVI ACCUM UVIS2 F350LP FLASH=6, BIN=NONE, 1 82 S (164 POS TARG -73.18, -37.54; S CR-SPLIT=NO, SIZEAXIS1=974, S) SPATIAL SCAN 0.2258, SIZEAXIS2=400, 3.7702 Degrees, Round CENTERAXIS1=490, trip; PHASE 0.306956 TO CENTERAXIS2=201 0.324040; GS ACQ SCENARIO BASE1BE; SEQ 1-2 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 WASP-43 WFC3/UVI ACCUM UVIS2 F350LP FLASH=6, BIN=NONE, 8 82 S (1312 POS TARG -73.18, -37.54; S CR-SPLIT=NO, CENTERAXIS1=490, S) SPATIAL SCAN 0.2258, CENTERAXIS2=201, 3.7702 Degrees, Round SIZEAXIS1=974, SIZEAXIS2=400 trip ------------------------------------------------------------------------------------------------------------------------------------ 3 WASP-43 WFC3/UVI ACCUM UVIS2 F350LP FLASH=6, BIN=NONE, 9 82 S (1476 POS TARG -73.18, -37.54; S CR-SPLIT=NO, CENTERAXIS1=490, S) SPATIAL SCAN 0.2258, CENTERAXIS2=201, 3.7702 Degrees, Round SIZEAXIS1=974, SIZEAXIS2=400 trip; SEQ 3-4 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 4 WASP-43 WFC3/UVI ACCUM UVIS2 F350LP FLASH=6, BIN=NONE, 1 82 S (82 POS TARG -73.18, -37.54; S CR-SPLIT=NO, CENTERAXIS1=490, S) SPATIAL SCAN 0.2258, CENTERAXIS2=201, 3.7702 Degrees, Forward SIZEAXIS1=974, SIZEAXIS2=400 ------------------------------------------------------------------------------------------------------------------------------------ 5 WASP-43 WFC3/UVI ACCUM UVIS2 F350LP FLASH=6, BIN=NONE, 9 82 S (1476 POS TARG -73.18, -37.54; S CR-SPLIT=NO, CENTERAXIS1=490, S) SPATIAL SCAN 0.2258, CENTERAXIS2=201, 3.7702 Degrees, Round SIZEAXIS1=974, SIZEAXIS2=400 trip; SEQ 5-6 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 6 WASP-43 WFC3/UVI ACCUM UVIS2 F350LP FLASH=6, BIN=NONE, 1 82 S (82 POS TARG -73.18, -37.54; S CR-SPLIT=NO, CENTERAXIS1=490, S) SPATIAL SCAN 0.2258, CENTERAXIS2=201, 3.7702 Degrees, Forward SIZEAXIS1=974, SIZEAXIS2=400 ------------------------------------------------------------------------------------------------------------------------------------ 7 WASP-43 WFC3/UVI ACCUM UVIS2 F350LP FLASH=6, BIN=NONE, 9 82 S (1476 POS TARG -73.18, -37.54; S CR-SPLIT=NO, CENTERAXIS1=490, S) SPATIAL SCAN 0.2258, CENTERAXIS2=201, 3.7702 Degrees, Round SIZEAXIS1=974, SIZEAXIS2=400 trip; SEQ 7-8 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 8 WASP-43 WFC3/UVI ACCUM UVIS2 F350LP FLASH=6, BIN=NONE, 1 82 S (82 POS TARG -73.18, -37.54; S CR-SPLIT=NO, CENTERAXIS1=490, S) SPATIAL SCAN 0.2258, CENTERAXIS2=201, 3.7702 Degrees, Forward SIZEAXIS1=974, SIZEAXIS2=400 15473( 6) - 10-Apr-2019 14:53:31 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ WASP-43 1 WFC3/UVI ACCUM UVIS2 F350LP none none none none 1 N/A S WASP-43 1 WFC3/UVI ACCUM UVIS2 F350LP none none none none 1 N/A S WASP-43 2 WFC3/UVI ACCUM UVIS2 F350LP none none 1 none 1 N/A S WASP-43 2 WFC3/UVI ACCUM UVIS2 F350LP none none 1 none 1 N/A S WASP-43 2 WFC3/UVI ACCUM UVIS2 F350LP none none 2 none 1 N/A S WASP-43 2 WFC3/UVI ACCUM UVIS2 F350LP none none 2 none 1 N/A S WASP-43 2 WFC3/UVI ACCUM UVIS2 F350LP none none 3 none 1 N/A S WASP-43 2 WFC3/UVI ACCUM UVIS2 F350LP none none 3 none 1 N/A S WASP-43 2 WFC3/UVI ACCUM UVIS2 F350LP none none 4 none 1 N/A S WASP-43 2 WFC3/UVI ACCUM UVIS2 F350LP none none 4 none 1 N/A S WASP-43 2 WFC3/UVI ACCUM UVIS2 F350LP none none 5 none 1 N/A S WASP-43 2 WFC3/UVI ACCUM UVIS2 F350LP none none 5 none 1 N/A S WASP-43 2 WFC3/UVI ACCUM UVIS2 F350LP none none 6 none 1 N/A S WASP-43 2 WFC3/UVI ACCUM UVIS2 F350LP none none 6 none 1 N/A S WASP-43 2 WFC3/UVI ACCUM UVIS2 F350LP none none 7 none 1 N/A S WASP-43 2 WFC3/UVI ACCUM UVIS2 F350LP none none 7 none 1 N/A S WASP-43 2 WFC3/UVI ACCUM UVIS2 F350LP none none 8 none 1 N/A S WASP-43 2 WFC3/UVI ACCUM UVIS2 F350LP none none 8 none 1 N/A S WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 1 none 2 N/A S WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 1 none 2 N/A S 15473( 6) - 10-Apr-2019 14:53:31 - [ 6] 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 | ------------------------------------------------------------------------------------------------------------------------------------ WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 2 none 2 N/A S WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 2 none 2 N/A S WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 3 none 2 N/A S WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 3 none 2 N/A S WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 4 none 2 N/A S WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 4 none 2 N/A S WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 5 none 2 N/A S WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 5 none 2 N/A S WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 6 none 2 N/A S WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 6 none 2 N/A S WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 7 none 2 N/A S WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 7 none 2 N/A S WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 8 none 2 N/A S WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 8 none 2 N/A S WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 9 none 2 N/A S WASP-43 3 WFC3/UVI ACCUM UVIS2 F350LP none none 9 none 2 N/A S WASP-43 4 WFC3/UVI ACCUM UVIS2 F350LP none none none none 2 N/A S WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 1 none 3 N/A S WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 1 none 3 N/A S WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 2 none 3 N/A S WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 2 none 3 N/A S WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 3 none 3 N/A S WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 3 none 3 N/A S WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 4 none 3 N/A S 15473( 6) - 10-Apr-2019 14:53:31 - [ 7] 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 | ------------------------------------------------------------------------------------------------------------------------------------ WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 4 none 3 N/A S WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 5 none 3 N/A S WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 5 none 3 N/A S WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 6 none 3 N/A S WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 6 none 3 N/A S WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 7 none 3 N/A S WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 7 none 3 N/A S WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 8 none 3 N/A S WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 8 none 3 N/A S WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 9 none 3 N/A S WASP-43 5 WFC3/UVI ACCUM UVIS2 F350LP none none 9 none 3 N/A S WASP-43 6 WFC3/UVI ACCUM UVIS2 F350LP none none none none 3 N/A S WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 1 none 4 N/A S WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 1 none 4 N/A S WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 2 none 4 N/A S WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 2 none 4 N/A S WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 3 none 4 N/A S WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 3 none 4 N/A S WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 4 none 4 N/A S WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 4 none 4 N/A S WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 5 none 4 N/A S WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 5 none 4 N/A S WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 6 none 4 N/A S WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 6 none 4 N/A S 15473( 6) - 10-Apr-2019 14:53:31 - [ 8] 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 | ------------------------------------------------------------------------------------------------------------------------------------ WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 7 none 4 N/A S WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 7 none 4 N/A S WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 8 none 4 N/A S WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 8 none 4 N/A S WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 9 none 4 N/A S WASP-43 7 WFC3/UVI ACCUM UVIS2 F350LP none none 9 none 4 N/A S WASP-43 8 WFC3/UVI ACCUM UVIS2 F350LP none none none none 4 N/A S 15473( 6) - 10-Apr-2019 14:53:31 - [ 9] Summary Form for Proposal 15473 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS2 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BIN=NONE, CENTERAXIS1=490, CENTERAXIS2=201, CR-SPLIT=NO, FLASH=6, SIZEAXIS1=974, SIZEAXIS2=400 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GS ACQ SCENARIO BASE1BE, ORIENT 100D TO 80 D, PHASE 0.306956 TO 0.324040, POS TARG -73.18, -37.54, Period 0.813473978 D AND ZERO-PHASE HJD2455528.868634, SCHED 100%, SEQ 1-2 NON-INT, SEQ 3-4 NON-INT, SEQ 5-6 NON-INT, SEQ 7-8 NON-INT, SPATIAL SCAN 0.2258, 3.7702 Degrees, Forward, SPATIAL SCAN 0.2258, 3.7702 Degrees, Round trip ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F350LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names WASP-43 ------------------------------------------------------------------------------------------------------------------------------------