18447( 2) - 17-Aug-2026 14:39:21 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 18447 Version: 2 Check-in Time: 17-Aug-2026 14:39:21 STScI Edit Number: 0 Title Muscles Advanced Library With an Atmospheric Retention Emphasis - Cycle 34 ------------------------------------------------------------------------------------ Type Cycle GO 34 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Kevin France University of Colorado at Boulder Y CoI: Dr. Christian Schneider Christian-Albrechts Universitat zu Kiel N CoI: Dr. Allison Youngblood NASA Goddard Space Flight Center N CoI: Dr. Cynthia Suzanne Froning Southwest Research Institute N CoI: Dr. Girish M. Duvvuri Vanderbilt University N CoI: Dr. Alexander Brown University of Colorado at Boulder N CoI: Dr. David John Wilson University of Colorado at Boulder N ------------------------------------------------------------------------------------ Abstract Shoring Up the Cosmic Shoreline: Improving the Cumulative XUV Irradiance Knowledge of Rocky Worlds DDT Targets The JWST Rocky Worlds Director's Discretionary Time (RW DDT) program is studying whether rocky planets orbiting M dwarf stars can retain their atmospheres. The RW DDT is targeting approximately 10 of the most promising small planets for (1) atmospheric detection observations with JWST and (2) measurements of the far-ultraviolet to infrared stellar spectral energy distributions with HST. The RW program is framed around the concept of the Cosmic Shoreline, where a planet's gravity (escape velocity) is compared with the escape-driving XUV energy input from the star. We propose to directly support the fundamental goal of the DDT program with a multi-cycle GO+AR program to quantify the stellar XUV environments of the RW target stars and empirically place them on the Cosmic Shoreline. We will do this with (1) new far-ultraviolet + X-ray (Chandra and XMM) observations of the host stars in Cycles 33, 34, and 35 that enable high-quality extreme-ultraviolet calculations and characterization of the full XUV (X-ray + extreme-ultraviolet) irradiance, (2) observation and characterization of stellar flares across the full high-energy spectral band to quantify the contribution of time-variable phenomena to the total ionizing radiation budget, and (3) creation of a high-level stellar data product library to support the community's analysis and interpretation of the terrestrial planet data acquired by the RW DDT program. ------------------------------------------------------------------------------------ Observations Description ------------------------ ++Observing Modes and Exposure Times: We propose deep, COS G140L CENWAVE 800 observations of each of the Rocky Worlds targets. The short wavelength coverage compared to the RW DDT HST plan (monitoring in COS G130M only; Espinoza & Diamond-Lowe 2025) provides access to key spectral diagnostics that |*|fill in|*| plasma temperature coverage 18447( 2) - 17-Aug-2026 14:39:21 - [ 2] for robust EUV spectral calculations using the DEM method, including the brightest stellar FUV lines in cool star atmosphere (C III |*|977 |*|A, O VI 1032/1038 |*|A; Redfield et al. 2002) and high-temperature lines not covered by standard COS G130M CENWAVE 1291 observations (S VI |*|933/944 |*|A, Fe XVIII 974 |*|A, Fe XIX 1118 |*|A; Redfield et al. 2003). G140L CENWAVE 800 has the additional advantage of being designed specifically to minimize the astigmatic spectral height on the COS detector at |*| < 1100 |*|A, reducing the background levels where HST|*|s sensitivity is lower (e.g., Sankrit et al. 2018). We estimate exposure times for our proposed observations by scaling the observed Si IV flux of LTT1445 A (Diamond Lowe et al. 2024) with line ratios derived from AU Mic observations by FUSE and HST (Redfield et al., 2002; Feinstein et al., 2022). We find that quiescent S/N per spectral resolution element |*| 4 |*| 5 in the peaks of key lines (C III, O VI, Fe XIX) can be achieved in 12 orbit observations (COS.sp.1949954, COS.sp.1949955, COS.sp.1949956), which we propose to break into 4 visits of 3 orbits each. These observations will also be sensitive to flares which can raise the FUV flux by factors of 5 |*| 10 and are expected to be present during |*| 25 |*| 40% of the total observing duration (France et al. 2020). The majority of our proposed targets have previous UV detections, and UV/X-ray flares have been observed on several of our proposed targets (e.g., Brown et al. 2022; Behr et al. 2023). ++FUV Spectral Lightcurve Production for Flares |*| The COS FUV XDL detector records spectra in time-tagged mode as [x (or |*|), y, t] photon lists, where x is the photon|*|s x-axis arrival position (i.e., wavelength), y is the photon|*|s cross-dispersion location, and t is the photon arrival time. The CALCOS-provided corrtag files contain the [x, y, t] photon lists, and the total number of counts in a [|*|x, |*|y] box is integrated over an arbitrary time step |*|t as part of CalCOS|*|s SplitTag package. Flux-calibrated light curves (in units of erg cm|*|2 s|*|1) are produced by integrating the SplitTag x1d spectrum over the wavelength interval |*| of the spectral line of interest. 18447( 2) - 17-Aug-2026 14:39:21 - [ 3] ++COS Instrument Safety & Lifetime Position Usage: All of the spectral estimates for our targets have been run through the STScI on-line Exposure Time Calculators, including the |*|M dwarf flare safety margins|*| (COS ISR 2017-01-v3). Our targets are all well within the safety limits for the COS FUV detector using the G140L grating (including the bright lines Ly|*|, Si IV, and C IV). The targets have been checked against the new COS Lifetime Position Usage rules and are well under the 1% guidelines (COS.sp.1958706). ------------------------------------------------------------------------------------ 18447( 2) - 17-Aug-2026 14:39:21 - [ 4] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 5 TOI-198 EXT-STAR, M V-IV RA=00H09M4.3584S +/- 0.1", J2000 V = 11.67 DEC=-27D07'19.68" +/- 0.1" Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. DDT: HST 18235, All LyA and FUV data scheduled by Oct 03 2026 SIMBAD: Proper motions mas/yr : 692.224 90.067 [0.027 0.026 90] A 2020yCat.1350....0G Radial velocity / Redshift / cz : V(km/s) 20.37 [0.58] / z(spectroscopic) 0.000068 [0.000002] / cz 20.37 [0.58] (Opt) A 2018yCat.1345....0G Parallaxes (mas): 42.0592 [0.0324] A 2020yCat.1350....0G Spectral type: M0V C 2006AJ....132..161G Fluxes (12) : U 14.332 [~] C 2010MNRAS.403.1949K B 13.184 [~] C 2010MNRAS.403.1949K V 11.670 [~] C 2010MNRAS.403.1949K Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.05184984336357723 0.090067 0.0420592 ------------------------------------------------------------------------------------------------------------------------------------ 18447( 2) - 17-Aug-2026 14:39:21 - [ 5] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 6 TOI-771 EXT-STAR, M V-IV RA=10H56M27.1949S +/- 0.1", J2000 V = 14.9 DEC=-72D59'5.44" +/- 0.1" Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. Vmag = 14.9, https://arxiv.org/abs/2504.18223, G. Lacedelli, et al. 2025 Pecaut & Mamajek 2013 for a T=3400, log(g) = 5.0 star, U-B = 1.39, B-V = 1.51. U = (V=14.9) + (B-V=1.51) + (U-B=1.39) = 18.8 DDT: HST 18249, STIS from STELa, FUV orbits in hand and more Fall 2026, LyA from STELa, in the archive now. SIMBAD: Proper motions mas/yr : 39.300 -76.417 [0.017 0.015 90] A 2020yCat.1350....0G Parallaxes (mas): 39.4467 [0.0136] A 2020yCat.1350....0G Spectral type: M3 D 2025A&A...698A.223L Fluxes (5) : R 14.347 [0.07] E 2012yCat.1322....0Z G 13.343480 [0.002805] C 2020yCat.1350....0G Bright Object Protection: Two object flag for NUV target acq, V = 15 - 16, both with B-V ~ 0.51. Using Pecaut & Mamajek 2013 we see those stars are likely main sequence F stars ( T=6300, logg= 4., 0 U-B=0.039, B-V= 0.519 ). A mid-F star at V = 15.35 clears the BOP : COS.ta.2361676. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.008953449385362704 -0.07641700003659935 0.0394467 ------------------------------------------------------------------------------------------------------------------------------------ 18447( 2) - 17-Aug-2026 14:39:21 - [ 6] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 7 HD-260655 EXT-STAR, M V-IV RA=06H37M10.7988S +/- 0.1", J2000 V = 9.593 DEC=+17D33'53.33" +/- 0.1" Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. DDT: HST 18236, FUV spectra in place by Dec 2026 (some scheduled earlier)/ LyA, FUV from STIS G140M, E140M, G130M in Hot Rocks SIMBAD: Proper motions mas/yr : -764.414 337.883 [0.022 0.018 90] A 2020yCat.1350....0G Radial velocity / Redshift / cz : V(km/s) -58.321 [0.0136] / z(spectroscopic) -0.000195 [0.000000] / cz -58.32 [0.01] (Opt) A 2018A&A...616A...7S Parallaxes (mas): 100.0232 [0.0208] A 2020yCat.1350....0G Spectral type: M0.0V C 2013AJ....145..102L Fluxes (12) : U 12.303 [~] C 2010MNRAS.403.1949K B 11.104 [~] C 2010MNRAS.403.1949K V 9.593 [~] C 2010MNRAS.403.1949K Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 -0.05345312221731278 0.337883 0.1000232 ------------------------------------------------------------------------------------------------------------------------------------ 18447( 2) - 17-Aug-2026 14:39:21 - [ 7] Visit: 01 (TOI198_vis1) 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 TOI-198 COS/NUV ACQ/IMA PSA MIRRORB 1 35 S (35 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOI-198 COS/FUV TIME-TA PSA G140L 800 FP-POS=1, BUFFER-TIME=1500, 1 2184 S G LIFETIME-POS=LP11 (2184 S) Comments: BOP check in the ETC uses the LyA flare spectrum that the STScI RW DDT team used for their APT file (GO18235). As another check, we ran the BOP assuming a 9000K BB with U = 12.03 (U - delU), and it also passes (COS.sp.2360354 ). ------------------------------------------------------------------------------------------------------------------------------------ 3 TOI-198 COS/FUV TIME-TA PSA G140L 800 FP-POS=2, BUFFER-TIME=1500, 1 2539 S G LIFETIME-POS=LP11 (2539 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 TOI-198 COS/FUV TIME-TA PSA G140L 800 FP-POS=3, BUFFER-TIME=1500, 1 2539 S G LIFETIME-POS=LP11 (2539 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 G140L 800 none none none none 1 N/A G TOI-198 3 COS/FUV TIME-TA PSA G140L 800 none none none none 2 N/A G TOI-198 4 COS/FUV TIME-TA PSA G140L 800 none none none none 3 N/A G 18447( 2) - 17-Aug-2026 14:39:21 - [ 8] Visit: 02 (TOI198_vis2) 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 TOI-198 COS/NUV ACQ/IMA PSA MIRRORB 1 35 S (35 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOI-198 COS/FUV TIME-TA PSA G140L 800 FP-POS=1, BUFFER-TIME=1500, 1 2184 S G LIFETIME-POS=LP11 (2184 S) Comments: BOP check in the ETC uses the LyA flare spectrum that the STScI RW DDT team used for their APT file (GO18235). As another check, we ran the BOP assuming a 9000K BB with U = 12.03 (U - delU), and it also passes (COS.sp.2360354 ). ------------------------------------------------------------------------------------------------------------------------------------ 3 TOI-198 COS/FUV TIME-TA PSA G140L 800 FP-POS=2, BUFFER-TIME=1500, 1 2539 S G LIFETIME-POS=LP11 (2539 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 TOI-198 COS/FUV TIME-TA PSA G140L 800 FP-POS=3, BUFFER-TIME=1500, 1 2539 S G LIFETIME-POS=LP11 (2539 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 G140L 800 none none none none 1 N/A G TOI-198 3 COS/FUV TIME-TA PSA G140L 800 none none none none 2 N/A G TOI-198 4 COS/FUV TIME-TA PSA G140L 800 none none none none 3 N/A G 18447( 2) - 17-Aug-2026 14:39:21 - [ 9] Visit: 03 (TOI198_vis3) 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 TOI-198 COS/NUV ACQ/IMA PSA MIRRORB 1 35 S (35 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOI-198 COS/FUV TIME-TA PSA G140L 800 FP-POS=1, BUFFER-TIME=1500, 1 2184 S G LIFETIME-POS=LP11 (2184 S) Comments: BOP check in the ETC uses the LyA flare spectrum that the STScI RW DDT team used for their APT file (GO18235). As another check, we ran the BOP assuming a 9000K BB with U = 12.03 (U - delU), and it also passes (COS.sp.2360354 ). ------------------------------------------------------------------------------------------------------------------------------------ 3 TOI-198 COS/FUV TIME-TA PSA G140L 800 FP-POS=2, BUFFER-TIME=1500, 1 2539 S G LIFETIME-POS=LP11 (2539 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 TOI-198 COS/FUV TIME-TA PSA G140L 800 FP-POS=3, BUFFER-TIME=1500, 1 2539 S G LIFETIME-POS=LP11 (2539 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 G140L 800 none none none none 1 N/A G TOI-198 3 COS/FUV TIME-TA PSA G140L 800 none none none none 2 N/A G TOI-198 4 COS/FUV TIME-TA PSA G140L 800 none none none none 3 N/A G 18447( 2) - 17-Aug-2026 14:39:21 - [ 10] Visit: 04 (TOI198_vis4) 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 TOI-198 COS/NUV ACQ/IMA PSA MIRRORB 1 35 S (35 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOI-198 COS/FUV TIME-TA PSA G140L 800 FP-POS=1, BUFFER-TIME=1500, 1 2184 S G LIFETIME-POS=LP11 (2184 S) Comments: BOP check in the ETC uses the LyA flare spectrum that the STScI RW DDT team used for their APT file (GO18235). As another check, we ran the BOP assuming a 9000K BB with U = 12.03 (U - delU), and it also passes (COS.sp.2360354 ). ------------------------------------------------------------------------------------------------------------------------------------ 3 TOI-198 COS/FUV TIME-TA PSA G140L 800 FP-POS=2, BUFFER-TIME=1500, 1 2539 S G LIFETIME-POS=LP11 (2539 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 TOI-198 COS/FUV TIME-TA PSA G140L 800 FP-POS=3, BUFFER-TIME=1500, 1 2539 S G LIFETIME-POS=LP11 (2539 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 G140L 800 none none none none 1 N/A G TOI-198 3 COS/FUV TIME-TA PSA G140L 800 none none none none 2 N/A G TOI-198 4 COS/FUV TIME-TA PSA G140L 800 none none none none 3 N/A G 18447( 2) - 17-Aug-2026 14:39:21 - [ 11] Visit: 05 (TOI771_vis1) 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 TOI-771 COS/NUV ACQ/IMA BOA MIRRORA 1 770 S (770 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOI-771 COS/FUV TIME-TA PSA G140L 800 FP-POS=1, BUFFER-TIME=1500, 1 846 S (846 G LIFETIME-POS=LP11 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 TOI-771 COS/FUV TIME-TA PSA G140L 800 FP-POS=2, BUFFER-TIME=1500, 1 2677 S G LIFETIME-POS=LP11 (2677 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 TOI-771 COS/FUV TIME-TA PSA G140L 800 FP-POS=3, BUFFER-TIME=1500, 1 2677 S G LIFETIME-POS=LP11 (2677 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-771 1 COS/NUV ACQ/IMA BOA MIRRORA none none none none 1 N/A GE TOI-771 2 COS/FUV TIME-TA PSA G140L 800 none none none none 1 N/A G TOI-771 3 COS/FUV TIME-TA PSA G140L 800 none none none none 2 N/A G TOI-771 4 COS/FUV TIME-TA PSA G140L 800 none none none none 3 N/A G 18447( 2) - 17-Aug-2026 14:39:21 - [ 12] Visit: 06 (TOI771_vis2) 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 TOI-771 COS/NUV ACQ/IMA BOA MIRRORA 1 770 S (770 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOI-771 COS/FUV TIME-TA PSA G140L 800 FP-POS=1, BUFFER-TIME=1500, 1 846 S (846 G LIFETIME-POS=LP11 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 TOI-771 COS/FUV TIME-TA PSA G140L 800 FP-POS=2, BUFFER-TIME=1500, 1 2677 S G LIFETIME-POS=LP11 (2677 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 TOI-771 COS/FUV TIME-TA PSA G140L 800 FP-POS=3, BUFFER-TIME=1500, 1 2677 S G LIFETIME-POS=LP11 (2677 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-771 1 COS/NUV ACQ/IMA BOA MIRRORA none none none none 1 N/A GE TOI-771 2 COS/FUV TIME-TA PSA G140L 800 none none none none 1 N/A G TOI-771 3 COS/FUV TIME-TA PSA G140L 800 none none none none 2 N/A G TOI-771 4 COS/FUV TIME-TA PSA G140L 800 none none none none 3 N/A G 18447( 2) - 17-Aug-2026 14:39:21 - [ 13] Visit: 07 (TOI771_vis3) 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 TOI-771 COS/NUV ACQ/IMA BOA MIRRORA 1 770 S (770 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOI-771 COS/FUV TIME-TA PSA G140L 800 FP-POS=1, BUFFER-TIME=1500, 1 846 S (846 G LIFETIME-POS=LP11 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 TOI-771 COS/FUV TIME-TA PSA G140L 800 FP-POS=2, BUFFER-TIME=1500, 1 2677 S G LIFETIME-POS=LP11 (2677 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 TOI-771 COS/FUV TIME-TA PSA G140L 800 FP-POS=3, BUFFER-TIME=1500, 1 2677 S G LIFETIME-POS=LP11 (2677 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-771 1 COS/NUV ACQ/IMA BOA MIRRORA none none none none 1 N/A GE TOI-771 2 COS/FUV TIME-TA PSA G140L 800 none none none none 1 N/A G TOI-771 3 COS/FUV TIME-TA PSA G140L 800 none none none none 2 N/A G TOI-771 4 COS/FUV TIME-TA PSA G140L 800 none none none none 3 N/A G 18447( 2) - 17-Aug-2026 14:39:21 - [ 14] Visit: 08 (TOI771_vis4) 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 TOI-771 COS/NUV ACQ/IMA BOA MIRRORA 1 770 S (770 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOI-771 COS/FUV TIME-TA PSA G140L 800 FP-POS=1, BUFFER-TIME=1500, 1 846 S (846 G LIFETIME-POS=LP11 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 TOI-771 COS/FUV TIME-TA PSA G140L 800 FP-POS=2, BUFFER-TIME=1500, 1 2677 S G LIFETIME-POS=LP11 (2677 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 TOI-771 COS/FUV TIME-TA PSA G140L 800 FP-POS=3, BUFFER-TIME=1500, 1 2677 S G LIFETIME-POS=LP11 (2677 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-771 1 COS/NUV ACQ/IMA BOA MIRRORA none none none none 1 N/A GE TOI-771 2 COS/FUV TIME-TA PSA G140L 800 none none none none 1 N/A G TOI-771 3 COS/FUV TIME-TA PSA G140L 800 none none none none 2 N/A G TOI-771 4 COS/FUV TIME-TA PSA G140L 800 none none none none 3 N/A G 18447( 2) - 17-Aug-2026 14:39:21 - [ 15] Visit: 09 (HD260655_vis1) 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 HD-260655 COS/NUV ACQ/IMA BOA MIRRORA 1 175 S (175 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-260655 COS/FUV TIME-TA PSA G130M 1055 FP-POS=1, BUFFER-TIME=15000, 1 1614 S G LIFETIME-POS=LP7 (1614 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-260655 COS/FUV TIME-TA PSA G130M 1055 FP-POS=2, BUFFER-TIME=15000, 1 2536 S G LIFETIME-POS=LP7 (2536 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HD-260655 COS/FUV TIME-TA PSA G130M 1055 FP-POS=3, BUFFER-TIME=15000, 1 2536 S G LIFETIME-POS=LP7 (2536 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 | ------------------------------------------------------------------------------------------------------------------------------------ HD-260655 1 COS/NUV ACQ/IMA BOA MIRRORA none none none none 1 N/A GE HD-260655 2 COS/FUV TIME-TA PSA G130M 1055 none none none none 1 N/A G HD-260655 3 COS/FUV TIME-TA PSA G130M 1055 none none none none 2 N/A G HD-260655 4 COS/FUV TIME-TA PSA G130M 1055 none none none none 3 N/A G 18447( 2) - 17-Aug-2026 14:39:21 - [ 16] Visit: 10 (HD260655_vis2) 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 HD-260655 COS/NUV ACQ/IMA BOA MIRRORA 1 175 S (175 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-260655 COS/FUV TIME-TA PSA G130M 1055 FP-POS=1, BUFFER-TIME=15000, 1 1614 S G LIFETIME-POS=LP7 (1614 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-260655 COS/FUV TIME-TA PSA G130M 1055 FP-POS=2, BUFFER-TIME=15000, 1 2536 S G LIFETIME-POS=LP7 (2536 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HD-260655 COS/FUV TIME-TA PSA G130M 1055 FP-POS=3, BUFFER-TIME=15000, 1 2536 S G LIFETIME-POS=LP7 (2536 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 | ------------------------------------------------------------------------------------------------------------------------------------ HD-260655 1 COS/NUV ACQ/IMA BOA MIRRORA none none none none 1 N/A GE HD-260655 2 COS/FUV TIME-TA PSA G130M 1055 none none none none 1 N/A G HD-260655 3 COS/FUV TIME-TA PSA G130M 1055 none none none none 2 N/A G HD-260655 4 COS/FUV TIME-TA PSA G130M 1055 none none none none 3 N/A G 18447( 2) - 17-Aug-2026 14:39:21 - [ 17] Visit: 11 (HD260655_vis3) 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 HD-260655 COS/NUV ACQ/IMA BOA MIRRORA 1 175 S (175 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-260655 COS/FUV TIME-TA PSA G130M 1055 FP-POS=1, BUFFER-TIME=15000, 1 1614 S G LIFETIME-POS=LP7 (1614 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-260655 COS/FUV TIME-TA PSA G130M 1055 FP-POS=2, BUFFER-TIME=15000, 1 2536 S G LIFETIME-POS=LP7 (2536 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HD-260655 COS/FUV TIME-TA PSA G130M 1055 FP-POS=3, BUFFER-TIME=15000, 1 2536 S G LIFETIME-POS=LP7 (2536 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 | ------------------------------------------------------------------------------------------------------------------------------------ HD-260655 1 COS/NUV ACQ/IMA BOA MIRRORA none none none none 1 N/A GE HD-260655 2 COS/FUV TIME-TA PSA G130M 1055 none none none none 1 N/A G HD-260655 3 COS/FUV TIME-TA PSA G130M 1055 none none none none 2 N/A G HD-260655 4 COS/FUV TIME-TA PSA G130M 1055 none none none none 3 N/A G 18447( 2) - 17-Aug-2026 14:39:21 - [ 18] Visit: 12 (HD260655_vis4) 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 HD-260655 COS/NUV ACQ/IMA BOA MIRRORA 1 175 S (175 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-260655 COS/FUV TIME-TA PSA G130M 1055 FP-POS=1, BUFFER-TIME=15000, 1 1614 S G LIFETIME-POS=LP7 (1614 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-260655 COS/FUV TIME-TA PSA G130M 1055 FP-POS=2, BUFFER-TIME=15000, 1 2536 S G LIFETIME-POS=LP7 (2536 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HD-260655 COS/FUV TIME-TA PSA G130M 1055 FP-POS=3, BUFFER-TIME=15000, 1 2536 S G LIFETIME-POS=LP7 (2536 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 | ------------------------------------------------------------------------------------------------------------------------------------ HD-260655 1 COS/NUV ACQ/IMA BOA MIRRORA none none none none 1 N/A GE HD-260655 2 COS/FUV TIME-TA PSA G130M 1055 none none none none 1 N/A G HD-260655 3 COS/FUV TIME-TA PSA G130M 1055 none none none none 2 N/A G HD-260655 4 COS/FUV TIME-TA PSA G130M 1055 none none none none 3 N/A G 18447( 2) - 17-Aug-2026 14:39:21 - [ 19] Summary Form for Proposal 18447 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures BOA, PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=1500, BUFFER-TIME=15000, FP-POS=1, FP-POS=2, FP-POS=3, LIFETIME-POS=LP11, LIFETIME-POS=LP7 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M, G140L, MIRRORA, MIRRORB ------------------------------------------------------------------------------------------------------------------------------------ Target Names HD-260655, TOI-198, TOI-771 ------------------------------------------------------------------------------------------------------------------------------------