17752( 3) - 09-Oct-2025 13:20:57 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17752 Version: 3 Check-in Time: 09-Oct-2025 13:20:57 STScI Edit Number: 1 Title Exploring the Origin of Gas in Debris Disks around A and B-type Stars ------------------------------------------------------------------------------------ Type Cycle GO 32 ------------------------------------------------------------------------------------ Investigators Contact? PI: Aoife Brennan Trinity College Dublin Y CoI: Prof. Luca Matra Trinity College Dublin N CoI: Mr. Kevin Daniel Smith Trinity College Dublin N CoI: Sebastian Marino University of Exeter N CoI: Prof. Seth Redfield Wesleyan University N CoI: Dr. David Wilner Smithsonian Institution Astrophysical N Observatory CoI: Dr. ANTONIO HALES Associated Universities, Inc. N CoI: Dr. Meredith Hughes Wesleyan University N CoI: Dr. Quentin Kral Observatoire de Paris N CoI: Dr. Aki Roberge NASA Goddard Space Flight Center N CoI: Isabel Rebollido ESA, European Space Astronomy Centre N CoI: Dr. Karin Oberg Harvard University N CoI: Dr. Julien Milli Institut de Planetologie et N d'Astrophysique de Grenoble CoI: Dr. Daniela Iglesias University of Leeds N ------------------------------------------------------------------------------------ Abstract Debris disks, which evolve from protoplanetary disks, were traditionally thought to be dust-poor and devoid of gas. However, recent ALMA surveys have revealed that at least 20 debris disks contain gas. Understanding the prevalence, origin, and evolution of this gas is crucial for studying the planetary systems' formation and evolution. The two leading origin theories propose that either the gas is primordial and therefore a remnant of the previous protoplanetary stage or second-generation and produced by the collisional cascade process. Thus far, the only detected molecule is CO, which quickly photodissociates if unshielded, producing neutral carbon (C I). In a primordial scenario, H2 shields CO against photodissociation, while in a secondary scenario, C I plays a pivotal role as a shielding agent. Our proposal aims to conduct a comprehensive survey of CO and C I gas in edge-on debris disks orbiting A and B-type stars, targeting seven disks not already observed by HST at sufficient sensitivity. Leveraging the sensitivity of HST/STIS far-UV absorption spectroscopy, we seek to detect cold gas co-located with dust disks at tens of AU. By detecting multiple transitions of CO and C I, we aim to accurately constrain their column densities and temperatures along the line of sight. We will then explore the systematic relationship between the C I/CO ratio and C I column density to determine whether C I is shielding CO in the high CO debris disk population, thereby confirming or refuting a secondary origin for the high CO mass disk population. ------------------------------------------------------------------------------------ Observations Description ------------------------ 17752( 3) - 09-Oct-2025 13:20:57 - [ 2] Our goal is to carry out a UV spectroscopic line survey of the edge-on exocometary belts around bright (A and B-type), detecting several different transitions of C I and CO. We will target two sets of C I lines transitions at 1613 A and 1657 A with differing oscillator strengths, as well as a several CO bands containing tens of lines, including strong A-X bands and weaker intersystem bands. Covering these bands and lines with a variety of oscillator strengths at once will give us the best constraints on the C I and CO column density and temperature in these systems. We request the use of STIS due to its resolving power (R=114000). At the velocity resoutions of 2.6 km/s, we expect all transition lines to be unresolved unless heavily saturated, as the gas is expected to be cold ( tens of K). We request the use of STIS using the E140H grating (i 1562) with the narrow spectroscopic slit (0.2 x 0.09) recommended for the highest spectral resolution gratings and for minimizing airglow contamination. This will allow us to cover the main CO band A-X 0-0 (1544 A), 1-0 (1510 A) and 2-0 (1478 A) bands, as well as the weaker CO bands at (1464 A), (1470 A), (1480 A), (1486 A), (1493 A), (1503 A), (1517 A), (1526 A), (1535 A), (1551 A), (1526 A), (1535 A), (1551 A), (1577 A), (1588 A), (1605 A), and lines of C I (1613 A) and (1657 A). We note that the high resolution of STIS will also allow us to disentangle ISM lines if also present, although ISM components were not detected for CO and C I for the three systems already observed, so we don't anticipate this being an issu ------------------------------------------------------------------------------------ 17752( 3) - 09-Oct-2025 13:20:57 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 -GAM-TRI STAR, A4-A9 V-IV, RA=02H17M18.8673S +/- J2000 V = 4.0 +/- .01 ohnson U=4.05+-0.01 CIRCUMSTELLAR MATTER, 0.0003456", DEC=+33D50'49.91" mag. Model fits to Johnson U, B, V, DISK +/- 0.0003099" Stromgren v, y, Tycho B, V, Gaia DR2, G, RP, 2MASS, J, H yields: Teff=9000(-800, +450) K, A_V=0.02(-0.02, +0.09), predicted flux at 1562 A = 7.79e-12 erg / s / cm^2 / A Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Please see the proposal description for how stellar parameters were derived. For ETC calculations we used the predicted flux from the best fit model at 1562 A. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.003632477348670999 -0.052685 0.0279795 ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-36546 STAR, A0-A3 V-IV, RA=05H33M30.7587S +/- 3.32e-5", J2000 V = 6.95 +/- .01 Model fits to Johnson CIRCUMSTELLAR MATTER, DEC=+24D37'43.73" +/- 2.51e-5" B, V, Stromgren b, v, Tycho B, V, Gaia DISK DR2 G, RP, BP, TESS, 2MASS, J, H, Ks, WISE W1, W2 yields: Teff = 9000(-300, +240)K, A_V = 0.01(-0.01, +0.1), predicted flux at 1562 A = 3.80e-12 erg / s / cm^2 / A Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. For ETC calculations we used the predicted flux from the best fit model at 1562 A. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 5.506255890764465E-4 -0.041305 0.0099821 ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-38206 STAR, A0-A3 V-IV, RA=05H43M21.6709S +/- 2.38e-5", J2000 V = 5.727 +/- .009 Johnson U = CIRCUMSTELLAR MATTER, DEC=-18D33'26.91" +/- 3.02e-5" 5.59+-0.01 mag. Model fits to Johnson DISK B, U, V, Stromgren b, v, y, Tycho B, V, Gaia DR2 G, RP, BP, TESS, 2MASS, J, H, Ks, WISE W1, W2 yields: Teff= 9500 (-200, +20)K, A_V = 0.01(-0.01, +0.04), predicted flux at 1562 A = 2.64e-11 erg / s / cm^2 / A Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. For ETC calculations we used the predicted flux from the best fit model at 1562 A. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.0013622995963678765 -0.013424 0.014147 ------------------------------------------------------------------------------------------------------------------------------------ 17752( 3) - 09-Oct-2025 13:20:57 - [ 4] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 4 HD-98363 STAR, A4-A9 V-IV, RA=11H17M58.1370S +/- 1.6e-5", J2000 V = 7.85 +/- .01 Johnson B = CIRCUMSTELLAR MATTER, DEC=-64D02'33.35" +/- 1.65e-5" 8.07+-0.015 mag. Model fits to Johnson DISK B, V, Tycho B, V, Gaia DR2 G, RP, BP, TESS, 2MASS, J, H, Ks, WISE W1, W2 yields: Teff = 8000(-100, +70)K, A_V = 0.007(-0.007, +0.05), predicted flux at 1562 A = 1.4e-13 erg / s / cm^2 / A Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. For ETC calculations we used the predicted flux from the best fit model at 1562 A. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 -0.004355009771286284 -6.27E-4 0.007288 ------------------------------------------------------------------------------------------------------------------------------------ 5 HD-158352 STAR, A4-A9 V-IV, RA=17H28M49.6548S +/- 5.46e-5", J2000 V = 5.412 +/- .009 Johnson U = CIRCUMSTELLAR MATTER, DEC=+00D19'50.25" +/- 4.69e-5" 5.74+-0.08 mag. Model fits to Johnson DISK U, B, V, Stromgren b, v, y, Tycho B, V, Gaia DR2 G, RP, TESS, 2MASS, H, Ks, WISE W1, W2 yields: Teff=7400K(-80, +150)K, A_V=0.01(-0.07, +0.01), predicted flux at 1562 A = 1.27e-13 erg / s / cm^2 / A Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. For ETC calculations we used the predicted flux from the best fit model at 1562 A. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 -0.004310138427278298 0.019221 0.0156711 ------------------------------------------------------------------------------------------------------------------------------------ 6 HD-143675 STAR, A4-A9 V-IV, RA=16H03M13.5398S +/- 2.25e-5", J2000 V = 8.04 +/- .01 Johnson B = 8.27+-0.01 CIRCUMSTELLAR MATTER, DEC=-35D17'14.93" +/- 1.38e-5" mag. Model fits to Johnson B, V, DISK Stromgren b, v, y, Tycho B, V, Gaia DR2 G, RP, BP, TESS, 2MASS, J, H, Ks, WISE W1, W2 yields: Teff=7850(-210, +140)K, A_V = 0.01 (+0.1, -0.01), predicted flux at 1562 A = 1.40e-13 erg / s / cm^2 / A Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. For ETC calculations we used the predicted flux from the best fit model at 1562 A. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 -0.0016086302115447498 -0.02628 0.0073692 ------------------------------------------------------------------------------------------------------------------------------------ 17752( 3) - 09-Oct-2025 13:20:57 - [ 5] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 7 HD-32297 STAR, A4-A9 V-IV, RA=05H02M27.4359S +/- 2.67e-5", J2000 V = 8.14 +/- .01 Johnson B = 8.36+-0.02 CIRCUMSTELLAR MATTER, DEC=+07D27'39.68" +/- 1.69e-5" mag. Model fits to Johnson B, V, Tycho DISK B, V, Gaia DR2 G, RP, TESS, 2MASS, J, H, Ks, WISE W1, W2 yields: Teff=7700(-180, +270)K, A_V=0.014(0.014, +0.067), predicted flux at 1562 A = 2.74e-14 erg / s / cm^2 / A Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. For ETC calculations we used the predicted flux from the best fit model at 1562 A. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 3.812949277457536E-4 -0.023526 0.0077081 ------------------------------------------------------------------------------------------------------------------------------------ 17752( 3) - 09-Oct-2025 13:20:57 - [ 6] Visit: 01 (GAM-TRI) 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 -GAM-TRI STIS/CCD ACQ F25ND5 MIRROR ACQTYPE=POINT 1 7 S (7 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 -GAM-TRI STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.4 S (0.4 K D S) ------------------------------------------------------------------------------------------------------------------------------------ 3 -GAM-TRI STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=163 1 1496 S -MAMA G see below (1510 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 -GAM-TRI STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=163 1 2624 S -MAMA G (2624 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 | ------------------------------------------------------------------------------------------------------------------------------------ -GAM-TRI 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A -GAM-TRI 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND -GAM-TRI 3 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 1 1510.0 S -MAMA G -GAM-TRI 4 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 2 N/A -MAMA G 17752( 3) - 09-Oct-2025 13:20:57 - [ 7] Visit: 02 (HD36546) 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-36546 STIS/CCD ACQ F25ND3 MIRROR ACQTYPE=POINT 1 0.1 S (0.1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-36546 STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.7 S (0.7 K D S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-36546 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=332 1 1513 S -MAMA G see below (1525 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HD-36546 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=332 1 2600 S -MAMA G see below (2618 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-36546 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A HD-36546 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND HD-36546 3 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 1 1525.0 S -MAMA G HD-36546 4 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 2 2618.0 S -MAMA G 17752( 3) - 09-Oct-2025 13:20:57 - [ 8] Visit: 03 (HD38206) 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-38206 STIS/CCD ACQ F25ND5 MIRROR ACQTYPE=POINT 1 3 S (3 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-38206 STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.2 S (0.2 K D S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-38206 STIS/FUV ACCUM 0.2X0.09 E140H 1562 1 739 S -MAMA see below (1579 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HD-38206 STIS/FUV ACCUM 0.2X0.09 E140H 1562 1 2600 S -MAMA see below (2613 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-38206 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A HD-38206 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND HD-38206 3 STIS/FUV ACCUM 0.2X0.09 E140H 1562 none none none none 1 1579.0 S -MAMA HD-38206 4 STIS/FUV ACCUM 0.2X0.09 E140H 1562 none none none none 2 2613.0 S -MAMA 17752( 3) - 09-Oct-2025 13:20:57 - [ 9] Visit: 04 (HD158352) 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-158352 STIS/CCD ACQ F25ND5 MIRROR ACQTYPE=POINT 1 0.7 S (0.7 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-158352 STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.1 S (0.1 K D S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-158352 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=7936 1 1514 S -MAMA G (1514 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HD-158352 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=7936 1 2595 S -MAMA G (2595 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 HD-158352 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=7936 1 2595 S -MAMA G (2595 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 HD-158352 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=7936 1 2595 S -MAMA G (2595 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 HD-158352 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=7936 1 2595 S -MAMA G (2595 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-158352 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A HD-158352 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND HD-158352 3 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 1 N/A -MAMA G HD-158352 4 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 2 N/A -MAMA G HD-158352 5 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 3 N/A -MAMA G HD-158352 6 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 4 N/A -MAMA G HD-158352 7 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 5 N/A -MAMA G 17752( 3) - 09-Oct-2025 13:20:57 - [ 10] Visit: 05 (HD143675) 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-143675 STIS/CCD ACQ F25ND3 MIRROR ACQTYPE=POINT 1 0.1 S (0.1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-143675 STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.9 S (0.9 K D S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-143675 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=5821 1 1377 S -MAMA G see below (1530 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HD-143675 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=5821 1 2629 S -MAMA G (2629 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-143675 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A HD-143675 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND HD-143675 3 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 1 1530.0 S -MAMA G HD-143675 4 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 2 N/A -MAMA G 17752( 3) - 09-Oct-2025 13:20:57 - [ 11] Visit: 06 (HD32297) 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-32297 STIS/CCD ACQ F25ND3 MIRROR ACQTYPE=POINT 1 0.4 S (0.4 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-32297 STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 5 S (5 S) K D ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-32297 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=13600 1 1403 S -MAMA G (1403 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HD-32297 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=13600 1 2000 S -MAMA G see below (2600 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 HD-32297 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=13600 1 2000 S -MAMA G see below (2600 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 HD-32297 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=13600 1 2000 S -MAMA G see below (2600 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 HD-32297 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=13600 1 2000 S -MAMA G see below (2600 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-32297 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A HD-32297 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND HD-32297 3 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 1 N/A -MAMA G HD-32297 4 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 2 2600.0 S -MAMA G HD-32297 5 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 3 2600.0 S -MAMA G HD-32297 6 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 4 2600.0 S -MAMA G 17752( 3) - 09-Oct-2025 13:20:57 - [ 12] 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-32297 7 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 5 2600.0 S -MAMA G 17752( 3) - 09-Oct-2025 13:20:57 - [ 13] Visit: 07 (HD32297) 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-32297 STIS/CCD ACQ F25ND3 MIRROR ACQTYPE=POINT 1 0.4 S (0.4 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-32297 STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 5 S (5 S) K D ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-32297 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=13600 1 1403 S -MAMA G (1403 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HD-32297 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=13600 1 2000 S -MAMA G see below (2600 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 HD-32297 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=13600 1 2000 S -MAMA G see below (2600 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 HD-32297 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=13600 1 2000 S -MAMA G see below (2600 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 HD-32297 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=13600 1 2000 S -MAMA G see below (2600 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-32297 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A HD-32297 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND HD-32297 3 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 1 N/A -MAMA G HD-32297 4 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 2 2600.0 S -MAMA G HD-32297 5 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 3 2600.0 S -MAMA G HD-32297 6 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 4 2600.0 S -MAMA G 17752( 3) - 09-Oct-2025 13:20:57 - [ 14] 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-32297 7 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 5 2600.0 S -MAMA G 17752( 3) - 09-Oct-2025 13:20:57 - [ 15] Visit: 08 (HD98363) 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-98363 STIS/CCD ACQ F25ND5 MIRROR ACQTYPE=POINT 1 16 S (16 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-98363 STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.9 S (0.9 K D S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-98363 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=5821 1 1173 S -MAMA G see below (1547 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HD-98363 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=5821 1 1173 S -MAMA G see below (2709 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 HD-98363 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 BUFFER-TIME=5821 1 1173 S -MAMA G see below (2709 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-98363 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A HD-98363 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND HD-98363 3 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 1 1547.0 S -MAMA G HD-98363 4 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 2 2709.0 S -MAMA G HD-98363 5 STIS/FUV TIME-TA 0.2X0.09 E140H 1562 none none none none 3 2709.0 S -MAMA G 17752( 3) - 09-Oct-2025 13:20:57 - [ 16] Visit: 53 (HD38206) 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-38206 STIS/CCD ACQ F25ND5 MIRROR ACQTYPE=POINT 1 3 S (3 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-38206 STIS/CCD ACQ/PEA 0.3X0.05N MIRROR 1 0.2 S (0.2 K D S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-38206 STIS/FUV ACCUM 0.2X0.09 E140H 1562 1 739 S -MAMA see below (1579 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HD-38206 STIS/FUV ACCUM 0.2X0.09 E140H 1562 1 2600 S -MAMA see below (2613 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-38206 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A HD-38206 2 STIS/CCD ACQ/PEA 0.3X0.05 MIRROR none none none none 1 N/A K ND HD-38206 3 STIS/FUV ACCUM 0.2X0.09 E140H 1562 none none none none 1 1579.0 S -MAMA HD-38206 4 STIS/FUV ACCUM 0.2X0.09 E140H 1562 none none none none 2 2613.0 S -MAMA 17752( 3) - 09-Oct-2025 13:20:57 - [ 17] Summary Form for Proposal 17752 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 0.2X0.09, 0.3X0.05ND, F25ND3, F25ND5 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/FUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ, ACQ/PEAK, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ACQTYPE=POINT, BUFFER-TIME=13600, BUFFER-TIME=163, BUFFER-TIME=332, BUFFER-TIME=5821, BUFFER-TIME=7936 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements E140H, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names -GAM-TRI, HD-143675, HD-158352, HD-32297, HD-36546, HD-38206, HD-98363 ------------------------------------------------------------------------------------------------------------------------------------