16456( 4) - 01-Mar-2021 21:14:12 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16456 Version: 4 Check-in Time: 01-Mar-2021 21:14:12 STScI Edit Number: 0 Title REVELATION: Reconnaissance of Extreme Velocity Exoplanets for Lyman-Alpha Transit Investigations of Outflowing Neutrals ------------------------------------------------------------------------------------ Type Cycle GO 28 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. R. O. Parke Loyd Eureka Scientific Inc. Y CoI: Dr. Evgenya L. Shkolnik Arizona State University N CoI: Dr. Adam Schneider United States Naval Observatory Flagstaff N Station CoI: Dr. Ruth A. Murray-Clay University of California - Santa Cruz N CoI: Dr. James Edward Owen Imperial College of London N CoI: John McCann University of California - Santa Barbara N CoI: Dr. Courtney Dressing University of California - Berkeley N CoI: Steven Giacalone University of California - Berkeley N CoI: Dr. David R. Ardila Jet Propulsion Laboratory N CoI: Dr. Travis Stuart Barman University of Arizona N CoI: Dr. Sarah Peacock NASA Goddard Space Flight Center N ------------------------------------------------------------------------------------ Abstract Exoplanets provide the only means of observing hydrodynamic atmospheric escape in action. However, absorption by the interstellar medium (ISM) has so far prevented the observation of transits in the Lyman-alpha core. Near the Lyman-alpha core, photons are plentiful and transits are deep. Capitalizing on the recent discoveries of TESS, it is now possible to push past this limitation. We have identified 2 planets confirmed since the last regular HST cycle in systems with radial velocities that shift the host star's Lyman-alpha line away from ISM absorption. These systems provide the potential to characterize the Lyman-alpha transits of planets smaller than Neptune and observe material escaping at velocities below 30 km/s for the first time. Doing so would enable previously infeasible tests of outflow models. It would also provide insight into the role of hydrodynamic escape in shaping the sub-Neptune planet population. Lyman-alpha reconnaissance of these 2 systems is the prudent first step toward these goals. Reconnaissance will eliminate key unknowns regarding the host star's intrinsic Lyman-alpha flux and the column depth of the intervening ISM. At the same time, this program will check for signs of deep Lyman-alpha transits. Doing so will enable informed planning of follow up observations to characterize the Lyman-alpha transits of the highest priority targets during the next regular HST cycle. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will allocate two HST orbits per target for a total of 4. For each target, one exposure will be made roughly 15 h prior to transit, with another following near mid-transit. We will observe these systems using STIS with the G140M grating and 1222 CENWAVE setting, a configuration used for previous successful Lya transit 16456( 4) - 01-Mar-2021 21:14:12 - [ 2] observations (e.g., Kulow et al. 2014). ------------------------------------------------------------------------------------ 16456( 4) - 01-Mar-2021 21:14:12 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 TYC-243-1528 STAR, EXTRA-SOLAR RA=09H52M44.4364S +/- J2000 V = V = 10.25 -1 PLANET, EXTRA-SOLAR 0.00005835647264578766", 79.54 PLANETARY SYSTEM, G DEC=+06D12'57.97" +/- V-IV 0.000054790739988526856" Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. User updated coordinates to those listed as ICRS in SIMBAD. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2015.5 -0.007221793339456465 -0.06171900008666853 0.0116268 ------------------------------------------------------------------------------------------------------------------------------------ 2 LP-961-53 STAR, EXTRA-SOLAR RA=11H54M18.7193S +/- J2000 V = V = 11.536 PLANET, EXTRA-SOLAR 0.000030428126673556512", 49.34 PLANETARY SYSTEM, M DEC=-37D33'12.08" +/- V-IV 0.000020191940911443034" Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. User updated coordinates to those listed as ICRS in SIMBAD. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2015.5 0.021116415003683546 -0.1450590001013552 0.0367762 ------------------------------------------------------------------------------------------------------------------------------------ 16456( 4) - 01-Mar-2021 21:14:12 - [ 4] Visit: 01 (TOI-561 c Out of Transit) Visit Requirements: SCHED 100%; Period 10.779 D AND ZERO-PHASE HJD2458527.06 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 TYC-243-152 STIS/CCD ACQ F28X50LP MIRROR ACQTYPE=POINT 1 0.1 S (0.1 PHASE 8-1 S) 0.18554596901382317 TO 0.9072270154930884; SEQ 1-4 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 TYC-243-152 STIS/CCD ACQ/PEA 52X0.05 MIRROR 1 0.1 S (0.1 8-1 K S) ------------------------------------------------------------------------------------------------------------------------------------ 3 TYC-243-152 STIS/FUV TIME-TA 52X0.05 G140M 1222 BUFFER-TIME=6853, WAVECAL=NO 1 2000 S 8-1 -MAMA G see below (1780 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 WAVE STIS/FUV ACCUM 52X0.05 G140M 1222 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ TYC-243-1528-1 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A TYC-243-1528-1 2 STIS/CCD ACQ/PEA 52X0.05 MIRROR none none none none 1 N/A K TYC-243-1528-1 3 STIS/FUV TIME-TA 52X0.05 G140M 1222 none none none none 1 1780.0 S -MAMA G WAVE 4 STIS/FUV ACCUM 52X0.05 G140M 1222 none none none none 1 N/A -MAMA 16456( 4) - 01-Mar-2021 21:14:12 - [ 5] Visit: 02 (TOI-561 c In Transit) Visit Requirements: SCHED 100%; AFTER 01 BY 15 H TO 2.5 D; BETWEEN 05-APR-2021:00:00:00 AND 05-JUL-2021:00:00:00; Period 10.779 D AND ZERO-PHASE HJD2458527.06 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 TYC-243-152 STIS/CCD ACQ F28X50LP MIRROR ACQTYPE=POINT 1 0.1 S (0.1 PHASE 0.9982291803344984 8-1 S) TO 0.004387389058972693; SEQ 1-4 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 TYC-243-152 STIS/CCD ACQ/PEA 52X0.05 MIRROR 1 0.1 S (0.1 8-1 K S) ------------------------------------------------------------------------------------------------------------------------------------ 3 TYC-243-152 STIS/FUV TIME-TA 52X0.05 G140M 1222 BUFFER-TIME=6853, WAVECAL=NO 1 2000 S 8-1 -MAMA G see below (1780 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 WAVE STIS/FUV ACCUM 52X0.05 G140M 1222 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ TYC-243-1528-1 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A TYC-243-1528-1 2 STIS/CCD ACQ/PEA 52X0.05 MIRROR none none none none 1 N/A K TYC-243-1528-1 3 STIS/FUV TIME-TA 52X0.05 G140M 1222 none none none none 1 1780.0 S -MAMA G WAVE 4 STIS/FUV ACCUM 52X0.05 G140M 1222 none none none none 1 N/A -MAMA 16456( 4) - 01-Mar-2021 21:14:12 - [ 6] Visit: 03 (TOI-776 b Out of Transit) Visit Requirements: SCHED 100%; Period 8.24664 D AND ZERO-PHASE HJD2458571.4167 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 LP-961-53 STIS/CCD ACQ F28X50LP MIRROR ACQTYPE=POINT 1 0.1 S (0.1 PHASE 0.2425230154341647 S) TO 0.8787384922829177; SEQ 1-4 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 LP-961-53 STIS/CCD ACQ/PEA 52X0.05 MIRROR 1 0.1 S (0.1 K S) ------------------------------------------------------------------------------------------------------------------------------------ 3 LP-961-53 STIS/FUV TIME-TA 52X0.05 G140M 1222 BUFFER-TIME=6821, WAVECAL=NO 1 2000 S -MAMA G see below (1785 S) Comments: Target is an M1, inactive. Checked for count rate violation risk due to flares per ISR STIS 2017-02 and found no violation, see ETC STIS.sp.1472374. ------------------------------------------------------------------------------------------------------------------------------------ 4 WAVE STIS/FUV ACCUM 52X0.05 G140M 1222 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ LP-961-53 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A LP-961-53 2 STIS/CCD ACQ/PEA 52X0.05 MIRROR none none none none 1 N/A K LP-961-53 3 STIS/FUV TIME-TA 52X0.05 G140M 1222 none none none none 1 1785.0 S -MAMA G WAVE 4 STIS/FUV ACCUM 52X0.05 G140M 1222 none none none none 1 N/A -MAMA 16456( 4) - 01-Mar-2021 21:14:12 - [ 7] Visit: 04 (TOI-776 b In Transit) Visit Requirements: SCHED 100%; AFTER 03 BY 15 H TO 3.5 D; BETWEEN 05-MAY-2021:00:00:00 AND 05-AUG-2021:00:00:00; Period 8.24664 D AND ZERO-PHASE HJD2458571.4167 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 LP-961-53 STIS/CCD ACQ F28X50LP MIRROR ACQTYPE=POINT 1 0.1 S (0.1 PHASE 0.9971357041826681 S) TO 0.002349441712018471; SEQ 1-4 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 LP-961-53 STIS/CCD ACQ/PEA 52X0.05 MIRROR 1 0.1 S (0.1 K S) ------------------------------------------------------------------------------------------------------------------------------------ 3 LP-961-53 STIS/FUV TIME-TA 52X0.05 G140M 1222 BUFFER-TIME=6821, WAVECAL=NO 1 2000 S -MAMA G see below (1785 S) Comments: Target is an M1, inactive. Checked for count rate violation risk due to flares per ISR STIS 2017-02 and found no violation, see ETC STIS.sp.1472374. ------------------------------------------------------------------------------------------------------------------------------------ 4 WAVE STIS/FUV ACCUM 52X0.05 G140M 1222 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ LP-961-53 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A LP-961-53 2 STIS/CCD ACQ/PEA 52X0.05 MIRROR none none none none 1 N/A K LP-961-53 3 STIS/FUV TIME-TA 52X0.05 G140M 1222 none none none none 1 1785.0 S -MAMA G WAVE 4 STIS/FUV ACCUM 52X0.05 G140M 1222 none none none none 1 N/A -MAMA 16456( 4) - 01-Mar-2021 21:14:12 - [ 8] Summary Form for Proposal 16456 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 52X0.05, F28X50LP ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/FUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ, ACQ/PEAK, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ACQTYPE=POINT, BUFFER-TIME=6821, BUFFER-TIME=6853, WAVECAL=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 15 H TO 2.5 D, AFTER 03 BY 15 H TO 3.5 D, BETWEEN 05-APR-2021:00:00:00 AND 05-JUL-2021:00:00:00, BETWEEN 05-MAY-2021:00:00:00 AND 05-AUG-2021:00:00:00, PHASE 0.18554596901382317 TO 0.9072270154930884, PHASE 0.2425230154341647 TO 0.8787384922829177, PHASE 0.9971357041826681 TO 0.002349441712018471, PHASE 0.9982291803344984 TO 0.004387389058972693, Period 10.779 D AND ZERO-PHASE HJD2458527.06, Period 8.24664 D AND ZERO-PHASE HJD2458571.4167, SCHED 100%, SEQ 1-4 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G140M, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names LP-961-53, TYC-243-1528-1, WAVE ------------------------------------------------------------------------------------------------------------------------------------