18235( 4) - 10-Jul-2026 00:18:43 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 18235 Version: 4 Check-in Time: 10-Jul-2026 00:18:43 STScI Edit Number: 1 Title Rocky Worlds DDT: HST Observations of TOI-198 ------------------------------------------------------------------------------------ Type Cycle GO/DD 33 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Hannah Diamond-Lowe Space Telescope Science Institute Y CoI: Dr. Nestor Espinoza Space Telescope Science Institute N CoI: Dr. John Henry Debes Space Telescope Science Institute - ESA - N JWST CoI: Dr. Leonardo Dos Santos Space Telescope Science Institute N CoI: Dr. Munazza Alam Space Telescope Science Institute N CoI: Rachel Cooper Space Telescope Science Institute N CoI: Tyler Baines Space Telescope Science Institute N CoI: Taylor James Bell Space Telescope Science Institute - ESA - N JWST CoI: Dr. Brett M. Morris Space Telescope Science Institute N CoI: Dr. Leonardo Ubeda Space Telescope Science Institute N CoI: Dr. Ian Wong Space Telescope Science Institute N CoI: Dr. Joshua D. Lothringer Space Telescope Science Institute N CoI: Ms. Misty Cracraft Space Telescope Science Institute N CoI: Dr. Joseph Filippazzo Space Telescope Science Institute N CoI: Mr. Douglas Ray Long Space Telescope Science Institute N CoI: Dr. Achrene Dyrek Space Telescope Science Institute - ESA - N JWST CoI: Dr. Elena Manjavacas Space Telescope Science Institute - ESA - N JWST CoI: Mees Fix Space Telescope Science Institute N CoI: Dr. Christopher Britt Space Telescope Science Institute N CoI: Hannah Braun Space Telescope Science Institute N CoI: Ryan Kunzer Space Telescope Science Institute N CoI: Kyle Conroy Space Telescope Science Institute N CoI: Dr. Mercedes Lopez-Morales Space Telescope Science Institute N CoI: Dr. I. Neill Reid Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract Rocky Worlds is a joint JWST and HST Director's Discretionary Program designed to implement the top recommendations from the Working Group on Strategic Exoplanet Initiatives with HST and JWST. The HST side of the Rocky Worlds DDT focuses on ultraviolet (UV) characterization of the nearby M-dwarf hosts of the rocky planets observed with JWST. We will use COS and STIS to measure the UV to blue-optical spectra of these stars, including UV flare monitoring and measuring the wings of the Ly-alpha profile where appropriate. With these observations we will constrain the high-energy output of these host M dwarfs in the UV, which can be applied to planetary models of atmospheric escape, as well as photochemistry if a planetary atmosphere is present. Complementary observations and analysis to fill in the rest of the M-dwarf panchromatic spectra, from the X-ray to the infrared, are encouraged. 18235( 4) - 10-Jul-2026 00:18:43 - [ 2] Each M-dwarf planet host observed by HST in the Rocky Worlds DDT program has its own Program ID. The observations in this program will focus on TOI-198. ------------------------------------------------------------------------------------ Observations Description ------------------------ HST observations of TOI-198. 12 orbits of flare monitoring using G130M/1222.We also obtain 4 orbits of G160M/1533 observations for coverage of important UV emission lines. We obtain NUV/Vis low resolution spectroscopy with STIS G230L, G430L, and G750L and the 52x0.2 slit in order to construct an accurate stellar SED and leverage the Mg II 2800 emission lines to tie to archival observations. Finally, we obtain G140M/1222 observations at the 52x0.2D1 slit position for Lyman alpha. All UV observations are obtained in time-tag mode to allow for light curves to be generated in the case of a flare or serendipitous transit. These observations mimic characterization of other M dwarfs from previous programs. ------------------------------------------------------------------------------------ 18235( 4) - 10-Jul-2026 00:18:43 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 TOI-198 STAR, EXTRA-SOLAR RA=00H09M5.1880S +/- 0.0000262", J2000 V = 19.7 V = 11.67 G =10.91 PLANETARY SYSTEM, M DEC=-27D07'18.24" +/- 0.000022" V-IV Reference Frame: ICRS Extended: NO Comments: Gaia DR3 coordinates double checked 06/25/2026 Fluxes double checked 06/25/2026 Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2016.0 0.05184965795439564 0.090067 0.042059 ------------------------------------------------------------------------------------------------------------------------------------ 18235( 4) - 10-Jul-2026 00:18:43 - [ 4] Visit: 01 (G130M-Flare1) Visit Requirements: SCHED 100% On Hold Comments: Additional Comments: Flare Monitoring 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 TOI-198 COS/NUV ACQ/IMA PSA MIRRORB 1 35 S (35 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOI-198 COS/FUV TIME-TA PSA G130M 1222 FP-POS=1, BUFFER-TIME=1350 1 1898 S G (1898 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 TOI-198 COS/FUV TIME-TA PSA G130M 1222 FP-POS=2, BUFFER-TIME=1350 1 2424 S G (2424 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 TOI-198 COS/FUV TIME-TA PSA G130M 1222 FP-POS=3, BUFFER-TIME=1350 1 2424 S G (2424 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 TOI-198 COS/FUV TIME-TA PSA G130M 1222 FP-POS=4, BUFFER-TIME=1350 1 2424 S G (2424 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 | ------------------------------------------------------------------------------------------------------------------------------------ TOI-198 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE TOI-198 2 COS/FUV TIME-TA PSA G130M 1222 none none none none 1 N/A G TOI-198 3 COS/FUV TIME-TA PSA G130M 1222 none none none none 2 N/A G TOI-198 4 COS/FUV TIME-TA PSA G130M 1222 none none none none 3 N/A G TOI-198 5 COS/FUV TIME-TA PSA G130M 1222 none none none none 4 N/A G 18235( 4) - 10-Jul-2026 00:18:43 - [ 5] Visit: 02 (G130M-Flare1) Visit Requirements: SCHED 100% On Hold Comments: Additional Comments: Flare Monitoring 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 TOI-198 COS/NUV ACQ/IMA PSA MIRRORB 1 35 S (35 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOI-198 COS/FUV TIME-TA PSA G130M 1222 FP-POS=1, BUFFER-TIME=1350 1 1898 S G (1898 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 TOI-198 COS/FUV TIME-TA PSA G130M 1222 FP-POS=2, BUFFER-TIME=1350 1 2424 S G (2424 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 TOI-198 COS/FUV TIME-TA PSA G130M 1222 FP-POS=3, BUFFER-TIME=1350 1 2424 S G (2424 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 TOI-198 COS/FUV TIME-TA PSA G130M 1222 FP-POS=4, BUFFER-TIME=1350 1 2424 S G (2424 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 | ------------------------------------------------------------------------------------------------------------------------------------ TOI-198 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE TOI-198 2 COS/FUV TIME-TA PSA G130M 1222 none none none none 1 N/A G TOI-198 3 COS/FUV TIME-TA PSA G130M 1222 none none none none 2 N/A G TOI-198 4 COS/FUV TIME-TA PSA G130M 1222 none none none none 3 N/A G TOI-198 5 COS/FUV TIME-TA PSA G130M 1222 none none none none 4 N/A G 18235( 4) - 10-Jul-2026 00:18:43 - [ 6] Visit: 03 (G130M-Flare1) Visit Requirements: SCHED 100% On Hold Comments: Additional Comments: Flare Monitoring 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 TOI-198 COS/NUV ACQ/IMA PSA MIRRORB 1 35 S (35 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOI-198 COS/FUV TIME-TA PSA G130M 1222 FP-POS=1, BUFFER-TIME=1350 1 1898 S G (1898 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 TOI-198 COS/FUV TIME-TA PSA G130M 1222 FP-POS=2, BUFFER-TIME=1350 1 2424 S G (2424 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 TOI-198 COS/FUV TIME-TA PSA G130M 1222 FP-POS=3, BUFFER-TIME=1350 1 2424 S G (2424 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 TOI-198 COS/FUV TIME-TA PSA G130M 1222 FP-POS=4, BUFFER-TIME=1350 1 2424 S G (2424 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 | ------------------------------------------------------------------------------------------------------------------------------------ TOI-198 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE TOI-198 2 COS/FUV TIME-TA PSA G130M 1222 none none none none 1 N/A G TOI-198 3 COS/FUV TIME-TA PSA G130M 1222 none none none none 2 N/A G TOI-198 4 COS/FUV TIME-TA PSA G130M 1222 none none none none 3 N/A G TOI-198 5 COS/FUV TIME-TA PSA G130M 1222 none none none none 4 N/A G 18235( 4) - 10-Jul-2026 00:18:43 - [ 7] Visit: 04 (G160M-UV coverage) Visit Requirements: SCHED 100%; ON HOLD On Hold Comments: The predicted brightness of CIV and Si IV are high enough to be a problem for flare conditions. We will put this visit on hold until we can observe Lyman alpha or other metal lines for this system. Once we have an observed value for this system we can re-do the flare clearance for this mode. 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 TOI-198 COS/NUV ACQ/IMA PSA MIRRORB 1 35 S (35 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOI-198 COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=1350, FP-POS=1 1 2044 S G (2044 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 TOI-198 COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=1350, FP-POS=2 1 2420 S G (2420 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 TOI-198 COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=1350, FP-POS=3 1 2420 S G (2420 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 TOI-198 COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=1350, FP-POS=4 1 2420 S G (2420 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 | ------------------------------------------------------------------------------------------------------------------------------------ TOI-198 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE TOI-198 2 COS/FUV TIME-TA PSA G160M 1533 none none none none 1 N/A G TOI-198 3 COS/FUV TIME-TA PSA G160M 1533 none none none none 2 N/A G TOI-198 4 COS/FUV TIME-TA PSA G160M 1533 none none none none 3 N/A G TOI-198 5 COS/FUV TIME-TA PSA G160M 1533 none none none none 4 N/A G 18235( 4) - 10-Jul-2026 00:18:43 - [ 8] Visit: 05 (STIS-Coverage1) Visit Requirements: SCHED 100% On Hold Comments: Additional Comments: UV characterization 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 TOI-198 STIS/CCD ACQ F25ND3 MIRROR 1 2 S (2 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOI-198 STIS/NUV TIME-TA 52X0.2 G230L 2376 BUFFER-TIME=370, WAVECAL=NO 1 1987 S -MAMA G (1987 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE STIS/NUV ACCUM 52X0.2 G230L 2376 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 | ------------------------------------------------------------------------------------------------------------------------------------ TOI-198 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A TOI-198 2 STIS/NUV TIME-TA 52X0.2 G230L 2376 none none none none 1 N/A -MAMA G WAVE 3 STIS/NUV ACCUM 52X0.2 G230L 2376 none none none none 1 N/A -MAMA 18235( 4) - 10-Jul-2026 00:18:43 - [ 9] Visit: 06 (STIS-Coverage2) Visit Requirements: SCHED 100% On Hold Comments: Additional Comments: Vis characterization 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 TOI-198 STIS/CCD ACQ F25ND3 MIRROR 1 2 S (2 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 WAVE STIS/CCD ACCUM 52X0.2 G430L 4300 1 DEF (0 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 TOI-198 STIS/CCD ACCUM 52X0.2E1 G430L 4300 CR-SPLIT=8 1 800 S (800 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 WAVE STIS/CCD ACCUM 52X0.2 G750L 7751 1 DEF (0 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 TOI-198 STIS/CCD ACCUM 52X0.2 G750L 7751 CR-SPLIT=5 1 210 S (210 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 CCDFLAT STIS/CCD ACCUM 0.3X0.09 G750L 7751 2 DEF (0 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 | ------------------------------------------------------------------------------------------------------------------------------------ TOI-198 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A WAVE 2 STIS/CCD ACCUM 52X0.2 G430L 4300 none none none none 1 N/A TOI-198 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 1 1 N/A TOI-198 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 2 1 N/A TOI-198 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 3 1 N/A TOI-198 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 4 1 N/A TOI-198 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 5 1 N/A TOI-198 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 6 1 N/A TOI-198 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 7 1 N/A TOI-198 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 8 1 N/A WAVE 4 STIS/CCD ACCUM 52X0.2 G750L 7751 none none none none 1 N/A TOI-198 5 STIS/CCD ACCUM 52X0.2 G750L 7751 none none none 1 1 N/A TOI-198 5 STIS/CCD ACCUM 52X0.2 G750L 7751 none none none 2 1 N/A TOI-198 5 STIS/CCD ACCUM 52X0.2 G750L 7751 none none none 3 1 N/A TOI-198 5 STIS/CCD ACCUM 52X0.2 G750L 7751 none none none 4 1 N/A TOI-198 5 STIS/CCD ACCUM 52X0.2 G750L 7751 none none none 5 1 N/A CCDFLAT 6 STIS/CCD ACCUM 0.3X0.09 G750L 7751 none none 1 none 1 N/A CCDFLAT 6 STIS/CCD ACCUM 0.3X0.09 G750L 7751 none none 2 none 1 N/A 18235( 4) - 10-Jul-2026 00:18:43 - [ 10] Visit: 07 (Lyman-alpha-1) Visit Requirements: SCHED 100%; BETWEEN 15-JUL-2026:00:00:00 AND 01-NOV-2026:00:00:00 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 TOI-198 STIS/CCD ACQ F25ND3 MIRROR 1 2 S (2 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOI-198 STIS/FUV TIME-TA 52X0.2D1 G140M 1222 WAVECAL=NO, BUFFER-TIME=1350 1 1962 S -MAMA G (1962 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE STIS/FUV ACCUM 52X0.2 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 | ------------------------------------------------------------------------------------------------------------------------------------ TOI-198 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A TOI-198 2 STIS/FUV TIME-TA 52X0.2D1 G140M 1222 none none none none 1 N/A -MAMA G WAVE 3 STIS/FUV ACCUM 52X0.2 G140M 1222 none none none none 1 N/A -MAMA 18235( 4) - 10-Jul-2026 00:18:43 - [ 11] Visit: 08 (Lyman-alpha-2) Visit Requirements: SCHED 100%; BETWEEN 15-JUL-2026:00:00:00 AND 01-NOV-2026:00:00:00 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 TOI-198 STIS/CCD ACQ F25ND3 MIRROR 1 2 S (2 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOI-198 STIS/FUV TIME-TA 52X0.2D1 G140M 1222 WAVECAL=NO, BUFFER-TIME=1350 1 1962 S -MAMA G (1962 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE STIS/FUV ACCUM 52X0.2 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 | ------------------------------------------------------------------------------------------------------------------------------------ TOI-198 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A TOI-198 2 STIS/FUV TIME-TA 52X0.2D1 G140M 1222 none none none none 1 N/A -MAMA G WAVE 3 STIS/FUV ACCUM 52X0.2 G140M 1222 none none none none 1 N/A -MAMA 18235( 4) - 10-Jul-2026 00:18:43 - [ 12] Visit: 09 (Lyman-alpha-3) Visit Requirements: SCHED 100%; BETWEEN 15-JUL-2026:00:00:00 AND 01-NOV-2026:00:00:00 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 TOI-198 STIS/CCD ACQ F25ND3 MIRROR 1 2 S (2 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOI-198 STIS/FUV TIME-TA 52X0.2D1 G140M 1222 WAVECAL=NO, BUFFER-TIME=1350 1 1962 S -MAMA G (1962 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE STIS/FUV ACCUM 52X0.2 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 | ------------------------------------------------------------------------------------------------------------------------------------ TOI-198 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A TOI-198 2 STIS/FUV TIME-TA 52X0.2D1 G140M 1222 none none none none 1 N/A -MAMA G WAVE 3 STIS/FUV ACCUM 52X0.2 G140M 1222 none none none none 1 N/A -MAMA 18235( 4) - 10-Jul-2026 00:18:43 - [ 13] Visit: 10 (Lyman-alpha-4) Visit Requirements: SCHED 100%; BETWEEN 15-JUL-2026:00:00:00 AND 11-NOV-2026:00:00:00 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 TOI-198 STIS/CCD ACQ F25ND3 MIRROR 1 2 S (2 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOI-198 STIS/FUV TIME-TA 52X0.2D1 G140M 1222 WAVECAL=NO, BUFFER-TIME=1350 1 1962 S -MAMA G (1962 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE STIS/FUV ACCUM 52X0.2 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 | ------------------------------------------------------------------------------------------------------------------------------------ TOI-198 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A TOI-198 2 STIS/FUV TIME-TA 52X0.2D1 G140M 1222 none none none none 1 N/A -MAMA G WAVE 3 STIS/FUV ACCUM 52X0.2 G140M 1222 none none none none 1 N/A -MAMA 18235( 4) - 10-Jul-2026 00:18:43 - [ 14] Summary Form for Proposal 18235 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 0.3X0.09, 52X0.2, 52X0.2D1, 52X0.2E1, F25ND3, PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV, STIS/CCD, STIS/FUV-MAMA, STIS/NUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ, ACQ/IMAGE, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=1350, BUFFER-TIME=370, CR-SPLIT=5, CR-SPLIT=8, FP-POS=1, FP-POS=2, FP-POS=3, FP-POS=4, WAVECAL=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 15-JUL-2026:00:00:00 AND 01-NOV-2026:00:00:00, BETWEEN 15-JUL-2026:00:00:00 AND 11-NOV-2026:00:00:00, ON HOLD , SCHED 100% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M, G140M, G160M, G230L, G430L, G750L, MIRROR, MIRRORB ------------------------------------------------------------------------------------------------------------------------------------ Target Names CCDFLAT, TOI-198, WAVE ------------------------------------------------------------------------------------------------------------------------------------