16207( 4) - 08-Jan-2021 18:17:35 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16207 Version: 4 Check-in Time: 08-Jan-2021 18:17:35 STScI Edit Number: 2 Title Photochemistry in TESS's first habitable zone terrestrial planet, TOI-700 d ------------------------------------------------------------------------------------ Type Cycle GO 28 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Giada Nicole Arney NASA Goddard Space Flight Center Y CoI: Dr. Allison Youngblood University of Colorado at Boulder Y CoI: Dr. Ravi Kopparapu NASA Goddard Space Flight Center N CoI: Dr. Eric David Lopez NASA Goddard Space Flight Center N CoI: Dr. Thomas Fauchez NASA Goddard Space Flight Center N CoI: Dr. Joshua Schlieder NASA Goddard Space Flight Center N CoI: Dr. Knicole Colon NASA Goddard Space Flight Center N CoI: Dr. Thomas Barclay University of Maryland Baltimore County N CoI: Ms. Emily Gilbert University of Chicago N CoI: Dr. Eric Theodore Wolf University of Colorado at Boulder N CoI: Ms. Gabrielle Engelmann-Suissa University of Washington N CoI: Dr. Elisa V Quintana NASA Goddard Space Flight Center N CoI: Prof. Victoria Suzanne Meadows University of Washington N ------------------------------------------------------------------------------------ Abstract Recently, the TESS spacecraft uncovered an exciting three-planet system that included its first habitable zone terrestrial planet, TOI-700 d. This system orbits an M2V dwarf located 31 pc away from Earth. Previous studies of the TOI-700 system have not included photochemistry, but photochemistry can strongly impact planetary atmospheric composition, habitability, and observable spectral features. A critical input for accurate photochemical modeling of this system is the UV spectrum of the host star, TOI-700. Measured UV spectra of exoplanet host stars have been heavily used for a diverse range of modeling efforts and are a critical in-demand need of the exoplanet community. We will measure the UV spectrum of TOI-700 (1150-5000 A), use it to update previous modeling efforts of possible atmospheres and spectra of TOI-700 d, and make the spectrum available to the community. This will result in the first self-consistent model atmospheres for TOI-700 d using a 3-D climate model with clouds and atmospheric dynamics coupled to a photochemical and spectral model. We will be able to put this new analysis into the context of previous works considering climatically and photochemically self-consistent atmospheres and spectra of potentially habitable M dwarf planets. TOI-700 will be the earliest M dwarf for which such a study has been performed for a specific known planet and will thus provide a useful point of comparison against potentially habitable worlds around later M dwarfs, including TRAPPIST-1 (M8V). The stellar UV spectrum we measure will also be able to be used in future works considering the atmospheres and spectral features of all planets in the TOI-700 system. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will obtain a ~1150-5500 Ang spectrum of the M2 dwarf TOI-700 (d=31 pc) with the COS and STIS instruments over 15 orbits. The modes used are COS G140L 16207( 4) - 08-Jan-2021 18:17:35 - [ 2] (1121-2148 Ang; 10 orbits), STIS G230L (1570-3180 Ang; 5 orbits), and STIS G430L (2900-5700 Ang; short exposure at the end of one of the STIS G230L orbits). All UV MAMA exposures will use TIME-TAG mode to identify any flares. For both STIS gratings, we will use the 52"x0.2" slit, the minimum recommended slit width for accurate absolute flux calibration. For the COS target acquisition, we will forgo the time-intensive ACQ/SEARCH exposure because our target's coordinates are very precise (Gaia DR2). We have constrained our observations to take place within a period of 2 weeks to minimize the effects of stellar variability on the spectrum. Impact of reduced-gyro operations: low. This program has no orientation constraints, no spatial scans, and lots of orbital visibility in the visit planner. The only constraint we impose that could make scheduling difficulty in reduced-gyro mode is that all our visits take place within a period of 2 weeks. This constraint could be relaxed in the event of reduced-gyro operations with only a moderate impact on the science goals. ------------------------------------------------------------------------------------ 16207( 4) - 08-Jan-2021 18:17:35 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 UCAC3-49-216 STAR, EXTRA-SOLAR RA=06H28M22.9720S +/- J2000 V = V = 13.08 +/- 0.02 11 PLANETARY SYSTEM, M 0.0000229", DEC=-65D34'43.01" -5.76 V-IV +/- 0.0000304" Reference Frame: ICRS Extended: NO 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) 2015.5 -0.016568132424273217 0.161805 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 16207( 4) - 08-Jan-2021 18:17:35 - [ 4] Visit: 01 (COS G140L 2 orbit visit) Visit Requirements: GROUP 01, 02, 03, 04, 05, 06 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 UCAC3-49-21 COS/NUV ACQ/IMA PSA MIRRORB 1 258 S (258 611 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 UCAC3-49-21 COS/FUV TIME-TA PSA G140L 1280 BUFFER-TIME=2261, FP-POS=1 1 2261 S 611 G (2261 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 UCAC3-49-21 COS/FUV TIME-TA PSA G140L 1280 BUFFER-TIME=3030, FP-POS=2 1 3030 S 611 G (3030 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 | ------------------------------------------------------------------------------------------------------------------------------------ UCAC3-49-21611 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE UCAC3-49-21611 2 COS/FUV TIME-TA PSA G140L 1280 none none none none 1 N/A G UCAC3-49-21611 3 COS/FUV TIME-TA PSA G140L 1280 none none none none 2 N/A G 16207( 4) - 08-Jan-2021 18:17:35 - [ 5] Visit: 02 (COS G140L 2 orbit visit) 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 UCAC3-49-21 COS/NUV ACQ/IMA PSA MIRRORB 1 258 S (258 SEQ 1-2 NON-INT 611 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 UCAC3-49-21 COS/FUV TIME-TA PSA G140L 1280 BUFFER-TIME=2261, FP-POS=3 1 2261 S 611 G (2261 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 UCAC3-49-21 COS/NUV ACQ/IMA PSA MIRRORB 1 258 S (258 NEW OBSET FULL ACQ; SEQ 611 GE S) 3-4 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 4 UCAC3-49-21 COS/FUV TIME-TA PSA G140L 1280 BUFFER-TIME=3030, FP-POS=4 1 2261 S 611 G (2261 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 | ------------------------------------------------------------------------------------------------------------------------------------ UCAC3-49-21611 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE UCAC3-49-21611 2 COS/FUV TIME-TA PSA G140L 1280 none none none none 1 N/A G UCAC3-49-21611 3 COS/NUV ACQ/IMA PSA MIRRORB none none none none 2 N/A GE UCAC3-49-21611 4 COS/FUV TIME-TA PSA G140L 1280 none none none none 2 N/A G 16207( 4) - 08-Jan-2021 18:17:35 - [ 6] Visit: 03 (COS G140L 3 orbit visit) 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 UCAC3-49-21 COS/NUV ACQ/IMA PSA MIRRORB 1 258 S (258 611 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 UCAC3-49-21 COS/FUV TIME-TA PSA G140L 1280 BUFFER-TIME=2261, FP-POS=1 1 2261 S 611 G (2261 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 UCAC3-49-21 COS/FUV TIME-TA PSA G140L 1280 BUFFER-TIME=3030, FP-POS=2 1 3030 S 611 G (3030 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 UCAC3-49-21 COS/FUV TIME-TA PSA G140L 1280 BUFFER-TIME=3030, FP-POS=3 1 3030 S 611 G (3030 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 | ------------------------------------------------------------------------------------------------------------------------------------ UCAC3-49-21611 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE UCAC3-49-21611 2 COS/FUV TIME-TA PSA G140L 1280 none none none none 1 N/A G UCAC3-49-21611 3 COS/FUV TIME-TA PSA G140L 1280 none none none none 2 N/A G UCAC3-49-21611 4 COS/FUV TIME-TA PSA G140L 1280 none none none none 3 N/A G 16207( 4) - 08-Jan-2021 18:17:35 - [ 7] Visit: 04 (COS G140L 3 orbit visit) 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 UCAC3-49-21 COS/NUV ACQ/IMA PSA MIRRORB 1 258 S (258 SEQ 1-2 NON-INT 611 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 UCAC3-49-21 COS/FUV TIME-TA PSA G140L 1280 BUFFER-TIME=2261, FP-POS=2 1 2261 S 611 G (2261 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 UCAC3-49-21 COS/NUV ACQ/IMA PSA MIRRORB 1 258 S (258 NEW OBSET FULL ACQ; SEQ 611 GE S) 3-4 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 4 UCAC3-49-21 COS/FUV TIME-TA PSA G140L 1280 BUFFER-TIME=3030, FP-POS=3 1 2261 S 611 G (2261 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 UCAC3-49-21 COS/NUV ACQ/IMA PSA MIRRORB 1 258 S (258 NEW OBSET FULL ACQ; SEQ 611 GE S) 5-6 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 6 UCAC3-49-21 COS/FUV TIME-TA PSA G140L 1280 BUFFER-TIME=3030, FP-POS=4 1 2261 S 611 G (2261 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 UCAC3-49-21 COS/NUV ACQ/IMA PSA MIRRORB 1 258 S (258 NEW OBSET FULL ACQ; SEQ 611 GE S) 7-8 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 8 UCAC3-49-21 COS/FUV TIME-TA PSA G140L 1280 BUFFER-TIME=3030, FP-POS=4 1 2261 S 611 G (2261 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 | ------------------------------------------------------------------------------------------------------------------------------------ UCAC3-49-21611 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE UCAC3-49-21611 2 COS/FUV TIME-TA PSA G140L 1280 none none none none 1 N/A G UCAC3-49-21611 3 COS/NUV ACQ/IMA PSA MIRRORB none none none none 2 N/A GE UCAC3-49-21611 4 COS/FUV TIME-TA PSA G140L 1280 none none none none 2 N/A G UCAC3-49-21611 5 COS/NUV ACQ/IMA PSA MIRRORB none none none none 3 N/A GE UCAC3-49-21611 6 COS/FUV TIME-TA PSA G140L 1280 none none none none 3 N/A G 16207( 4) - 08-Jan-2021 18:17:35 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ UCAC3-49-21611 7 COS/NUV ACQ/IMA PSA MIRRORB none none none none 4 N/A GE UCAC3-49-21611 8 COS/FUV TIME-TA PSA G140L 1280 none none none none 4 N/A G 16207( 4) - 08-Jan-2021 18:17:35 - [ 9] Visit: 05 (STIS G230L 2 orbit visit) 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 UCAC3-49-21 STIS/CCD ACQ F25ND3 MIRROR 1 7 S (7 S) 611 ------------------------------------------------------------------------------------------------------------------------------------ 2 UCAC3-49-21 STIS/NUV TIME-TA 52X0.2 G230L 2376 BUFFER-TIME=691 1 2472 S 611 -MAMA G (2472 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 UCAC3-49-21 STIS/NUV TIME-TA 52X0.2 G230L 2376 BUFFER-TIME=691 1 3066 S 611 -MAMA G (3066 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 | ------------------------------------------------------------------------------------------------------------------------------------ UCAC3-49-21611 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A UCAC3-49-21611 2 STIS/NUV TIME-TA 52X0.2 G230L 2376 none none none none 1 N/A -MAMA G UCAC3-49-21611 3 STIS/NUV TIME-TA 52X0.2 G230L 2376 none none none none 2 N/A -MAMA G 16207( 4) - 08-Jan-2021 18:17:35 - [ 10] Visit: 06 (STIS G230L 3 orbit visit + G430L) 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 UCAC3-49-21 STIS/CCD ACQ F25ND3 MIRROR 1 7 S (7 S) 611 ------------------------------------------------------------------------------------------------------------------------------------ 2 UCAC3-49-21 STIS/NUV TIME-TA 52X0.2 G230L 2376 BUFFER-TIME=691 1 2472 S 611 -MAMA G (2472 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 UCAC3-49-21 STIS/NUV TIME-TA 52X0.2 G230L 2376 BUFFER-TIME=691 1 3066 S 611 -MAMA G (3066 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 UCAC3-49-21 STIS/NUV TIME-TA 52X0.2 G230L 2376 BUFFER-TIME=691 1 2251 S 611 -MAMA G (2251 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 UCAC3-49-21 STIS/CCD ACCUM 52X0.2E1 G430L 4300 CR-SPLIT=3 1 300 S (300 611 S) Comments: E1 aperture selected to mitigate charge transfer efficiency issues. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ UCAC3-49-21611 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A UCAC3-49-21611 2 STIS/NUV TIME-TA 52X0.2 G230L 2376 none none none none 1 N/A -MAMA G UCAC3-49-21611 3 STIS/NUV TIME-TA 52X0.2 G230L 2376 none none none none 2 N/A -MAMA G UCAC3-49-21611 4 STIS/NUV TIME-TA 52X0.2 G230L 2376 none none none none 3 N/A -MAMA G UCAC3-49-21611 5 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 1 3 N/A UCAC3-49-21611 5 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 2 3 N/A UCAC3-49-21611 5 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 3 3 N/A 16207( 4) - 08-Jan-2021 18:17:35 - [ 11] Summary Form for Proposal 16207 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 52X0.2, 52X0.2E1, F25ND3, PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV, STIS/CCD, STIS/NUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ, ACQ/IMAGE, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=2261, BUFFER-TIME=3030, BUFFER-TIME=691, CR-SPLIT=3, FP-POS=1, FP-POS=2, FP-POS=3, FP-POS=4 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GROUP 01, 02, 03, 04, 05, 06 WITHIN 14D, NEW OBSET FULL ACQ, SEQ 1-2 NON-INT, SEQ 3-4 NON-INT, SEQ 5-6 NON-INT, SEQ 7-8 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G140L, G230L, G430L, MIRROR, MIRRORB ------------------------------------------------------------------------------------------------------------------------------------ Target Names UCAC3-49-21611 ------------------------------------------------------------------------------------------------------------------------------------