17490( 9) - 08-Jan-2026 18:20:52 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17490 Version: 9 Check-in Time: 08-Jan-2026 18:20:52 STScI Edit Number: 2 Title A Local Lyman Continuum Leaker: Direct and Indirect Detections with KISSB 85 ------------------------------------------------------------------------------------ Type Cycle GO 31 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Alec S. Hirschauer Morgan State University Y CoI: Samantha Wallis Brunker Indiana University System N CoI: Prof. John J. Salzer Indiana University System N CoI: Dr. Svea S Hernandez Space Telescope Science Institute - ESA - N JWST CoI: Dr. Bethan Lesley James Space Telescope Science Institute - ESA - N JWST CoI: Dr. Alessandra Aloisi Space Telescope Science Institute N CoI: Dr. Matilde Mingozzi Space Telescope Science Institute - ESA - N JWST CoI: Dr. Logan H Jones Space Telescope Science Institute N CoI: Dr. Claus Leitherer Space Telescope Science Institute N CoI: Dr. Swara Ravindranath Catholic University of America N ------------------------------------------------------------------------------------ Abstract The specific mechanisms responsible for the reionization of the Universe remain poorly understood. While it is generally accepted that this period of transformation was primarily a consequence of highly-ionizing Lyman continuum (LyC) radiation leaking from high-redshift star-forming galaxies (SFGs), their direct detection is observationally precluded due to the high opacities of the ubiquitous intergalactic medium. Local analogs to these systems, with attributes which mirror the environments of the early Universe such as high ionization and low metal abundances, represent our best accessible means to obtain detailed measurements of LyC photons. We propose for COS far-ultraviolet (FUV) observations of the candidate LyC leaker KISSB 85, a nearby (z = 0.046; D = 206 Mpc), metal-poor (12+log(O/H) = 7.42; ~5% Z_solar), high-ionization (O32 = 17.3) SFG. This dwarf system possesses similar charateristics to early-Universe LyC leakers, but is nearby enough to allow for meticulous examination of its radiation profile. In addition, we will utilize these direct detections to examine an indirect means for estimating LyC with the saturated C II 1334.5 A absorption feature, which will allow for a broader understanding of the mechanisms which enable LyC leakage. With measurement of the Lyman-alpha line profile, we will study the neutral gas properties of this high-z analog system, and through efforts fitting the spectral profile with two different theoretical models, we will characterize the metallicity, age, and dust attenuation of the observed young, massive stellar population which produces the ionizing radiation, supporting current efforts being undertaken with JWST. ------------------------------------------------------------------------------------ Observations Description ------------------------ We are observing the Lyman continuum (LyC) leaker candidate KISSB 85. This is a nearby (z = 0.046; D = 206 Mpc), metal-poor (12+log(O/H) = 7.42; ~5% Z_solar), 17490( 9) - 08-Jan-2026 18:20:52 - [ 2] high-ionization (O32 = 17.3) star-forming galaxy. Observations will be undertaken utilizing HST/COS far-ultraviolet (far-UV) spectroscopy with the G140L grating and cenwave 800, which will recover LyC photons (lambda_observed < 954.3 A) directly. Additionally, we will observe with HST/COS grating G130M and cenwave 1291, which will detect Lyman-alpha (Lya) photons (lambda_observed = 1272.0 A), as well as the C II 1334.5 A spectral feature (lambda_observed = 1396.4 A), which has proven a reliable proxy for measuring the LyC escape fraction when direct observations are precluded. This will enable us to better understand the mechanism(s) facilitating the escape of ionizing photons which are capable of ionizing the early Universe in the nearby, high-redshift star-forning galaxy analog KISSB 85. In addition, we will characterize Lya itself and, employing the near-UV target acquisition images, we will study the morphology of this compact system as well. The exposure time necessary to acquire an ACQ/IMAGE with S/N = 20 was preliminarily calculated by the exposure time calculator (ETC) to be 219.25 seconds, which is much less than one orbit. G140L/800 spectroscopy of LyC photons with S/N = 2-3 was computed with the ETC to take 21, 353.86 seconds, or approximately 6.7 orbits. G130M/1291 spectroscopy of Lya emission (S/N = 20) and the indirect C II feature (S/N >5) was computed with the ETC to take 3, 429.93 seconds, or approximately 1.0 orbits. The total exposure time is estimated to require eight orbits. Our observing strategy will be to split our eight orbits into two separate visits, as scheduling is limited to five orbits at a time, avoiding visits of four orbits, whenever possible. We therefore will conduct a first visit of five orbits, which will begin with an imaging acquisition. The remainder of this first orbit will then be taken up entirely with an exposure of G140L/800 at FP-POS = 1. The subsequent three orbits (orbits 2, 3, and 4 of visit 1) will each be entirely comprised of G140L/800 exposures, at FP-POS = 2, 3, and 4, respectively. Finally, the last orbit of this visit (orbit 5) will be split between the two allowed G130M/1291 FP-POS settings (3 and 4). The second visit will then be three orbits, which will again begin with an imaging acquisition. Once again, the remainder of this first orbit will be entirely taken up with an exposure of G140L/800 at FP-POS = 1. Orbit 2 will be split evenly between G140L/800 FP-POS = 2 and 3. Finally, the last orbit of the visit (orbit 3) will be entirely dedicated to G140L/800 FP-POS = 4. This strategy results in uneven exposure times for the four FP-POS settings of G140L/800, with emphasis on FP-POS = 4. This is because, of the four FP-POS possible, FP-POS = 4 goes to the shortest wavelength, which will give us the best possible chance at recovering LyC photons. The total exposure time for each of the four G140L/800 FP-POS settings are as follows: FP-POS First Integration Second Integration Total Exposure Time --------------------------------------------------------------- 1 1909 seconds 1909 seconds 3818 seconds 2 2688 seconds 1286 seconds 3974 seconds 3 2688 seconds 1286 seconds 3974 seconds 4 2688 seconds 2688 seconds 5376 seconds --------------------------------------------------------------- 17490( 9) - 08-Jan-2026 18:20:52 - [ 3] We note that, comparing the ETC computations made for this APT Phase II file with those made for the initial Phase I submission in May 2023, there had been a version update of pyETC (v31.1 to v31.2) within which the dark rates (as reported via monitoring by the HST/COS Instrument Team) were elevated significantly. This has the effect of requiring a longer science integration time to achieve the same S/N. Due to the necessities of the strategy outlined here, including time lost to overheads, the number of orbits which will be dedicated to G140L/800 (~6.5) is a bit less than proposed for (~6.7). This has the consequence of potentially lowering the S/N expected for LyC photons, however as we expect to bin heavily below the Lyman Break in effort to recover said photons, this should not be a problem. Here now is a summary of the observing program strategy: Visit Orbit Mode FP-POS Exp. Time ETC# -------------------------------------------------------------------- 1 1 IMAGE/ACQ N/A 221 sec COS.ta.1888782 1 1 G140L/800 1 1909 sec COS.sp.1888785 1 2 G140L/800 2 2686 sec COS.sp.1888786 1 3 G140L/800 3 2686 sec COS.sp.1888786 1 4 G140L/800 4 2686 sec COS.sp.1888786 1 5 G130M/1291 3 1285 sec COS.sp.1888783 1 5 G130M/1291 4 1285 sec COS.sp.1888783 2 1 IMAGE/ACQ N/A 221 sec COS.ta.1888782 2 1 G140L/800 1 1909 sec COS.sp.1888785 2 2 G140L/800 2 1286 sec COS.sp.1888784 2 2 G140L/800 3 1286 sec COS.sp.1888784 2 3 G140L/800 4 2686 sec COS.sp.1888786 -------------------------------------------------------------------- BUFFER-TIME values for science exposures were set to be 2/3 * Buffer Fill Time reported in the ETC calculations. For the G140L/800 observations, 10, 101 sec * 2/3 = 6, 734 sec. For the G130M/1291 observations, 5, 883 sec * 2/3 = 3, 922 sec. UPDATE (1 July 2024): Due to HST now operating under reduced gyro mode (RGM), the usable exposure duration per orbit has been reduced further. In addition, at this point in time the ETC version has been updated to 32.2. Here are updated records for the ETC runs, where the BUFFER-TIME has been revised to reflect the constraints of the exposure times. (G140L/800) FP-POS First Integration Second Integration Total Exposure Time --------------------------------------------------------------- 1 1860 seconds 1860 seconds 3720 seconds 2 2588 seconds 1236 seconds 3824 seconds 3 2588 seconds 1237 seconds 3825 seconds 4 2588 seconds 2588 seconds 5176 seconds --------------------------------------------------------------- (observing program summary) Visit Orbit Mode FP-POS Exp. Time ETC# -------------------------------------------------------------------- 17490( 9) - 08-Jan-2026 18:20:52 - [ 4] 1 1 IMAGE/ACQ N/A 221 sec COS.ta.1888782 1 1 G140L/800 1 1860 sec COS.sp.1926681 1 2 G140L/800 2 2588 sec COS.sp.1926380 1 3 G140L/800 3 2588 sec COS.sp.1926380 1 4 G140L/800 4 2588 sec COS.sp.1926380 1 5 G130M/1291 3 1216 sec COS.sp.1926381 1 5 G130M/1291 4 1217 sec COS.sp.1926381 2 1 IMAGE/ACQ N/A 221 sec COS.ta.1888782 2 1 G140L/800 1 1860 sec COS.sp.1926681 2 2 G140L/800 2 1236 sec COS.sp.1926678 2 2 G140L/800 3 1237 sec COS.sp.1926678 2 3 G140L/800 4 2588 sec COS.sp.1926380 -------------------------------------------------------------------- UPDATE (21 January 2025): Due to failed observations for both Visit 01 (partial) and 02 (complete), I have had to revise the APT file. In short, the first three Orbits for Visit 01 executed successfully, but the final two Orbits failed. My repeat for Visit 01 (which will be Visit 03) will therefore consist of one Orbit consisting of an imaging target acquisition, then FP-POS = 3 and 4 of G130M/1291, followed by a second Orbit consisting entirely of G140L/800 FP-POS = 4. The repeat for Visit 02 (which will be Visit 04) is simply a like for like repeat. By squeezing the IMAGE/ACQ with the two G130M/1291 FP-POS settings into one orbit, I've had to reduce the observing time for the science exposures, in effort to keep the G140L/800 observation integrating as long as possible. (observing program summary) Visit Orbit Mode FP-POS Exp. Time ETC# -------------------------------------------------------------------- 3 1 IMAGE/ACQ N/A 221 sec COS.ta.1888782 3 1 G130M/1291 3 876 sec COS.sp.1947976 3 1 G130M/1291 4 876 sec COS.sp.1947976 3 2 G140L/800 4 2588 sec COS.sp.1926380 4 1 IMAGE/ACQ N/A 221 sec COS.ta.1888782 4 1 G140L/800 1 1860 sec COS.sp.1926681 4 2 G140L/800 2 1236 sec COS.sp.1926678 4 2 G140L/800 3 1237 sec COS.sp.1926678 4 3 G140L/800 4 2588 sec COS.sp.1926380 -------------------------------------------------------------------- UPDATE (8 December 2025): Due to a failed observation for Visit 03, I am revising the APT file. In short, it appears that, of the two Orbits for Visit 03, Orbit one (IMAGE/ACQ, then G130M/1291 FP-POS = 3 and 4) failed, but Orbit two (G140L/800) succeeded. Svea submitted a HOPR request to re-do the failed Orbit, which was approved, so I am going to have a new Visit 05 that consists only of the IMAGE/ACQ and G130M/1291 FP-POS = 3 and 4 exposures. This will simply be a like for like repeat of Visit 03 Orbit one, since G140L/800 (Orbit two) was unaffected. The Visit 04 has yet to happen, so I will leave that as is. Because the length of orbital visibility has apparently decreased slightly since the last time I re-submitted this program, a small amount of time had to 17490( 9) - 08-Jan-2026 18:20:52 - [ 5] shaved off from each of the G130M/1291 exposures in order for the proposed observations to fit within a single orbit, and maintaining the IMAGE/ACQ exposure duration. As a consequence, the G130M/1291 FP-POS = 3 and 4 exposure times have been reduced from 876 to 867 seconds each. These changes have been documented with a new ETC simulation in the Table below. There is consequently a slightly reduced expected S/N for these exposures. (observing program summary) Visit Orbit Mode FP-POS Exp. Time ETC# -------------------------------------------------------------------- 4 1 IMAGE/ACQ N/A 221 sec COS.ta.1888782 4 1 G140L/800 1 1860 sec COS.sp.1926681 4 2 G140L/800 2 1236 sec COS.sp.1926678 4 2 G140L/800 3 1237 sec COS.sp.1926678 4 3 G140L/800 4 2588 sec COS.sp.1926380 5 1 IMAGE/ACQ N/A 221 sec COS.ta.1888782 5 1 G130M/1291 3 867 sec COS.sp.2260162 5 1 G130M/1291 4 867 sec COS.sp.2260162 -------------------------------------------------------------------- UPDATE (8 January 2026): Due to a failed observation for Visit 05, I am revising the APT file. In short, it appears that, for the single Orbit for Visit 05, the G130M/1291 FP-POS = 3 and 4 observations failed. I submitted a HOPR request which was approved, so I am going to have a new Visit 06 that consists only of the IMAGE/ACQ and G130/1291 FP-POS = 3 and 4 exposures. This will simply be a like for like repeat of Visit 05. Since the last time I had to revise the APT file was very recently, none of the observing parameters have changed, and so the program summary is in the Table below. (observing program summary) Visit Orbit Mode FP-POS Exp. Time ETC# -------------------------------------------------------------------- 6 1 IMAGE/ACQ N/A 221 sec COS.ta.1888782 6 1 G130M/1291 3 867 sec COS.sp.2260162 6 1 G130M/1291 4 867 sec COS.sp.2260162 -------------------------------------------------------------------- ------------------------------------------------------------------------------------ 17490( 9) - 08-Jan-2026 18:20:52 - [ 6] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 KISS-F1205-5 GALAXY, DWARF COMPACT, RA=12H06M47.5459S +/- 0.1", J2000 Z = V = 19.27 m_B = 19.85, FUV (GALEX) AB = 985 EMISSION LINE NEBULA, DEC=+29D20'33.26" +/- 0.1" 0.046 20.1377 +/- 0.1793, g (SDSS model) AB = STARBURST 19.016 +/- 0.013 Reference Frame: ICRS Extended: YES Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. See http://ned.ipac.caltech.edu/byname?objname=KISSB+85&hconst= 67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1 for more "Other Fluxes". Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.0 0.0 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 17490( 9) - 08-Jan-2026 18:20:52 - [ 7] Visit: 01 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 KISS-F1205- COS/NUV ACQ/IMA PSA MIRRORA 1 221 S (221 5985 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 KISS-F1205- COS/FUV TIME-TA PSA G140L 800 FP-POS=1, BUFFER-TIME=7806 1 1860 S 5985 G (1860 S) Comments: Original BUFFER-TIME = 10101 seconds (from ETC's Buffer Fill Time) * 2/3 = 6734 seconds New BUFFER-TIME = 11709 seconds (from ETC's Buffer Fill Time) * 2/3 = 7806 seconds ------------------------------------------------------------------------------------------------------------------------------------ 3 KISS-F1205- COS/FUV TIME-TA PSA G140L 800 FP-POS=2, BUFFER-TIME=7293 1 2588 S 5985 G (2588 S) Comments: Original BUFFER-TIME = 10101 seconds (from ETC's Buffer Fill Time) * 2/3 = 6734 seconds New BUFFER-TIME = 10939 seconds (from ETC's Buffer Fill Time) * 2/3 = 7293 seconds ------------------------------------------------------------------------------------------------------------------------------------ 4 KISS-F1205- COS/FUV TIME-TA PSA G140L 800 FP-POS=3, BUFFER-TIME=7293 1 2588 S 5985 G (2588 S) Comments: Original BUFFER-TIME = 10101 seconds (from ETC's Buffer Fill Time) * 2/3 = 6734 seconds New BUFFER-TIME = 10939 seconds (from ETC's Buffer Fill Time) * 2/3 = 7293 seconds ------------------------------------------------------------------------------------------------------------------------------------ 5 KISS-F1205- COS/FUV TIME-TA PSA G140L 800 FP-POS=4, BUFFER-TIME=7293 1 2588 S 5985 G (2588 S) Comments: Original BUFFER-TIME = 10101 seconds (from ETC's Buffer Fill Time) * 2/3 = 6734 seconds New BUFFER-TIME = 10939 seconds (from ETC's Buffer Fill Time) * 2/3 = 7293 seconds ------------------------------------------------------------------------------------------------------------------------------------ 6 KISS-F1205- COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=4279 1 1216 S 5985 G (1216 S) Comments: Original BUFFER-TIME = 5883 seconds (from ETC's Buffer Fill Time) * 2/3 = 3922 seconds New BUFFER-TIME = 6418 seconds (from ETC's Buffer Fill Time) * 2/3 = 4279 seconds 17490( 9) - 08-Jan-2026 18:20:52 - [ 8] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------------ 7 KISS-F1205- COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=4279 1 1217 S 5985 G (1217 S) Comments: Original BUFFER-TIME = 5883 seconds (from ETC's Buffer Fill Time) * 2/3 = 3922 seconds New BUFFER-TIME = 6418 seconds (from ETC's Buffer Fill Time) * 2/3 = 4279 seconds ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ KISS-F1205-5985 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE KISS-F1205-5985 2 COS/FUV TIME-TA PSA G140L 800 none none none none 1 N/A G KISS-F1205-5985 3 COS/FUV TIME-TA PSA G140L 800 none none none none 2 N/A G KISS-F1205-5985 4 COS/FUV TIME-TA PSA G140L 800 none none none none 3 N/A G KISS-F1205-5985 5 COS/FUV TIME-TA PSA G140L 800 none none none none 4 N/A G KISS-F1205-5985 6 COS/FUV TIME-TA PSA G130M 1291 none none none none 5 N/A G KISS-F1205-5985 7 COS/FUV TIME-TA PSA G130M 1291 none none none none 5 N/A G 17490( 9) - 08-Jan-2026 18:20:52 - [ 9] Visit: 02 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 KISS-F1205- COS/NUV ACQ/IMA PSA MIRRORA 1 221 S (221 5985 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 KISS-F1205- COS/FUV TIME-TA PSA G140L 800 FP-POS=1, BUFFER-TIME=7806 1 1860 S 5985 G (1860 S) Comments: Original BUFFER-TIME = 10101 seconds (from ETC's Buffer Fill Time) * 2/3 = 6734 seconds New BUFFER-TIME = 11709 seconds (from ETC's Buffer Fill Time) * 2/3 = 7806 seconds ------------------------------------------------------------------------------------------------------------------------------------ 3 KISS-F1205- COS/FUV TIME-TA PSA G140L 800 FP-POS=2, BUFFER-TIME=7806 1 1236 S 5985 G (1236 S) Comments: Original BUFFER-TIME = 10101 seconds (from ETC's Buffer Fill Time) * 2/3 = 6734 seconds New BUFFER-TIME = 11709 seconds (from ETC's Buffer Fill Time) * 2/3 = 7806 seconds ------------------------------------------------------------------------------------------------------------------------------------ 4 KISS-F1205- COS/FUV TIME-TA PSA G140L 800 FP-POS=3, BUFFER-TIME=7806 1 1237 S 5985 G (1237 S) Comments: Original BUFFER-TIME = 10101 seconds (from ETC's Buffer Fill Time) * 2/3 = 6734 seconds New BUFFER-TIME = 11709 seconds (from ETC's Buffer Fill Time) * 2/3 = 7806 seconds ------------------------------------------------------------------------------------------------------------------------------------ 5 KISS-F1205- COS/FUV TIME-TA PSA G140L 800 FP-POS=4, BUFFER-TIME=7293 1 2588 S 5985 G (2588 S) Comments: Original BUFFER-TIME = 10101 seconds (from ETC's Buffer Fill Time) * 2/3 = 6734 seconds New BUFFER-TIME = 10939 seconds (from ETC's Buffer Fill Time) * 2/3 = 7293 seconds ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ 17490( 9) - 08-Jan-2026 18:20:52 - [ 10] 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 | ------------------------------------------------------------------------------------------------------------------------------------ KISS-F1205-5985 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE KISS-F1205-5985 2 COS/FUV TIME-TA PSA G140L 800 none none none none 1 N/A G KISS-F1205-5985 3 COS/FUV TIME-TA PSA G140L 800 none none none none 2 N/A G KISS-F1205-5985 4 COS/FUV TIME-TA PSA G140L 800 none none none none 2 N/A G KISS-F1205-5985 5 COS/FUV TIME-TA PSA G140L 800 none none none none 3 N/A G 17490( 9) - 08-Jan-2026 18:20:52 - [ 11] Visit: 03 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 KISS-F1205- COS/NUV ACQ/IMA PSA MIRRORA 1 221 S (221 5985 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 KISS-F1205- COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=4088 1 876 S (876 5985 G S) Comments: BUFFER-TIME = 6132 seconds (from ETC's Buffer Fill Time) * 2/3 = 4088 seconds ------------------------------------------------------------------------------------------------------------------------------------ 3 KISS-F1205- COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=4088 1 876 S (876 5985 G S) Comments: BUFFER-TIME = 6132 seconds (from ETC's Buffer Fill Time) * 2/3 = 4088 seconds ------------------------------------------------------------------------------------------------------------------------------------ 4 KISS-F1205- COS/FUV TIME-TA PSA G140L 800 FP-POS=4, BUFFER-TIME=7293 1 2586 S 5985 G (2586 S) Comments: BUFFER-TIME = 10939 seconds (from ETC's Buffer Fill Time) * 2/3 = 7293 seconds ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ KISS-F1205-5985 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE KISS-F1205-5985 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G KISS-F1205-5985 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G KISS-F1205-5985 4 COS/FUV TIME-TA PSA G140L 800 none none none none 2 N/A G 17490( 9) - 08-Jan-2026 18:20:52 - [ 12] Visit: 04 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 KISS-F1205- COS/NUV ACQ/IMA PSA MIRRORA 1 221 S (221 5985 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 KISS-F1205- COS/FUV TIME-TA PSA G140L 800 FP-POS=1, BUFFER-TIME=7806 1 1860 S 5985 G (1860 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 KISS-F1205- COS/FUV TIME-TA PSA G140L 800 FP-POS=2, BUFFER-TIME=7806 1 1236 S 5985 G (1236 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 KISS-F1205- COS/FUV TIME-TA PSA G140L 800 FP-POS=3, BUFFER-TIME=7806 1 1237 S 5985 G (1237 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 KISS-F1205- COS/FUV TIME-TA PSA G140L 800 FP-POS=4, BUFFER-TIME=7293 1 2588 S 5985 G (2588 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 | ------------------------------------------------------------------------------------------------------------------------------------ KISS-F1205-5985 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE KISS-F1205-5985 2 COS/FUV TIME-TA PSA G140L 800 none none none none 1 N/A G KISS-F1205-5985 3 COS/FUV TIME-TA PSA G140L 800 none none none none 2 N/A G KISS-F1205-5985 4 COS/FUV TIME-TA PSA G140L 800 none none none none 2 N/A G KISS-F1205-5985 5 COS/FUV TIME-TA PSA G140L 800 none none none none 3 N/A G 17490( 9) - 08-Jan-2026 18:20:52 - [ 13] Visit: 05 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 KISS-F1205- COS/NUV ACQ/IMA PSA MIRRORA 1 221 S (221 5985 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 KISS-F1205- COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=4871 1 876 S 5985 G see below (867 S) Comments: BUFFER-TIME = 7307 seconds (from ETC's Buffer Fill Time) * 2/3 = 4871 seconds ------------------------------------------------------------------------------------------------------------------------------------ 3 KISS-F1205- COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=4871 1 876 S 5985 G see below (867 S) Comments: BUFFER-TIME = 7307 seconds (from ETC's Buffer Fill Time) * 2/3 = 4871 seconds ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ KISS-F1205-5985 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE KISS-F1205-5985 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 867.0 S G KISS-F1205-5985 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 867.0 S G 17490( 9) - 08-Jan-2026 18:20:52 - [ 14] Visit: 06 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 KISS-F1205- COS/NUV ACQ/IMA PSA MIRRORA 1 221 S (221 5985 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 KISS-F1205- COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=4871 1 867 S (867 5985 G S) Comments: BUFFER-TIME = 7307 seconds (from ETC's Buffer Fill Time) * 2/3 = 4871 seconds ------------------------------------------------------------------------------------------------------------------------------------ 3 KISS-F1205- COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=4871 1 867 S (867 5985 G S) Comments: BUFFER-TIME = 7307 seconds (from ETC's Buffer Fill Time) * 2/3 = 4871 seconds ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ KISS-F1205-5985 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE KISS-F1205-5985 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G KISS-F1205-5985 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G 17490( 9) - 08-Jan-2026 18:20:52 - [ 15] Summary Form for Proposal 17490 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=4088, BUFFER-TIME=4279, BUFFER-TIME=4871, BUFFER-TIME=7293, BUFFER-TIME=7806, FP-POS=1, FP-POS=2, FP-POS=3, FP-POS=4 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M, G140L, MIRRORA ------------------------------------------------------------------------------------------------------------------------------------ Target Names KISS-F1205-5985 ------------------------------------------------------------------------------------------------------------------------------------