16219( 3) - 23-Nov-2020 22:44:23 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16219 Version: 3 Check-in Time: 23-Nov-2020 22:44:23 STScI Edit Number: 0 Title Exploring the origin of the M31-M33 filament ------------------------------------------------------------------------------------ Type Cycle GO 28 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Kat A Barger Texas Christian University Y CoI: Dr. Andrew J. Fox Space Telescope Science Institute - ESA N CoI: Dr. Felix J. Lockman Associated Universities, Inc. N CoI: Dr. Daniel J Pisano III West Virginia University Research N Corporation CoI: Dr. Bart P. Wakker University of Wisconsin - Madison N CoI: Dr. Spencer Allen Wolfe West Virginia University Research N Corporation CoI: Dr. Elena D'Onghia University of Wisconsin - Madison N ------------------------------------------------------------------------------------ Abstract Between M31 and M33 lies a debris field of HI clouds. These clouds may represent a tidal remnant from a past interaction between M31 and a satellite galaxy, a population of satellite galaxies, halo gas condensations, cooling gas along an intergalactic medium filament, or M31 stellar or weak AGN feedback. We request HST/COS UV absorption-line and coordinated GBT HI emission-line observations along 2 UV bright background QSO sightlines to conduct a detailed investigation of the chemical composition, dust depletion patterns, and kinematics of the M31-M33 clouds to constrain their origin. Using the requested observations, along with archival observations, we will further measure their ionization properties to determine the relative influence of the surrounding coronal gas and the incident radiation field has on them. Combined, this will enable us to assess where this gas came from, how much material it contains in neutral and ionized gas, and whether this stream could survive a journey to M31. This study will provide insight on how L* galaxies replenish their gas reservoirs by measuring the physical properties of material that is inflowing onto M31 in absorption- and emission-line spectroscopy out to 1/3 of a virial radius. ------------------------------------------------------------------------------------ Observations Description ------------------------ This is a 12-orbit proposal to observe two background QSO targets that lie between M31-M33. For all visits, we begin with an ACQ SEARCH followed by an ACQ IMAGE, which are then both followed by science observations. For all sceince observations, we use 2 FP-POS positions (positions 3 and 4) to dither the placing of the spectrum on the COS G130M grating with central wavelength set to 1291 AA. V01 to V03 observes QSO (GALAX-J010328.6+354730, z=0.525) for a total of 10 orbits. We split these into 3 visits with V01 having 4 orbits and V01 and 2 both having 3 orbits. 16219( 3) - 23-Nov-2020 22:44:23 - [ 2] V04 observes a QSO (GALAX-J010415.8+402243, z=0.193) for 2 orbits. There are no scheduling constraints on any of the visits. All targets passed the instrument bright target checks such that they are below the COS brightness limits. ------------------------------------------------------------------------------------ 16219( 3) - 23-Nov-2020 22:44:23 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 GALEX-J01032 ISM, ABSORPTION LINE RA=01H03M28.6560S +/- 0.2", J2000 V = 18.82876 V=15.4 mag, FUV=18.83 mag, 8.6+354730 SYSTEM - EXTRAGALACTIC, DEC=+35D47'29.87" +/- 0.2" NUV=17.57 mag FILAMENT, HIGH VELOCITY CLOUD, IGM, TIDAL TAIL Reference Frame: ICRS Extended: NO Comments: This object was generated by the target selector and retrieved from the GALEX database. ------------------------------------------------------------------------------------------------------------------------------------ 2 GALEX-J01041 ISM, ABSORPTION LINE RA=01H04M15.7810S +/- 0.2", J2000 V = 16.80416 g=15.91 mag, FUV=16.79 5.8+402243 SYSTEM - EXTRAGALACTIC, DEC=+40D22'44.00" +/- 0.2" mag, NUV=16.38 mag FILAMENT, HIGH VELOCITY CLOUD, IGM, TIDAL TAIL Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the GALEX database. ------------------------------------------------------------------------------------------------------------------------------------ 16219( 3) - 23-Nov-2020 22:44:23 - [ 4] Visit: 01 (J010328 4-orbit) 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 GALEX-J0103 COS/NUV ACQ/SEA PSA MIRRORB SCAN-SIZE=2, STEP-SIZE=1.767, 1 22 S (22 28.6+354730 RCH CENTER=FLUX-WT S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GALEX-J0103 COS/NUV ACQ/IMA PSA MIRRORB 1 22 S (22 28.6+354730 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 3 GALEX-J0103 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=4867 1 2168 S 28.6+354730 G (2168 S) Comments: Total Buffer for Target J0103 from ETC: 7301 s Message in APT states that "For APT purposes, the recommended buffer time should be 2/3 of the buffer time calculated above", which would give 4867 s ------------------------------------------------------------------------------------------------------------------------------------ 4 GALEX-J0103 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=4867 1 2744 S 28.6+354730 G (2744 S) Comments: Total Buffer for Target J0103 from ETC: 7301 s Message in APT states that "For APT purposes, the recommended buffer time should be 2/3 of the buffer time calculated above", which would give 4867 s ------------------------------------------------------------------------------------------------------------------------------------ 5 GALEX-J0103 COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=4867 1 2744 S 28.6+354730 G (2744 S) Comments: Total Buffer for Target J0103 from ETC: 7301 s Message in APT states that "For APT purposes, the recommended buffer time should be 2/3 of the buffer time calculated above", which would give 4867 s ------------------------------------------------------------------------------------------------------------------------------------ 6 GALEX-J0103 COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=4867 1 2744 S 28.6+354730 G (2744 S) Comments: Total Buffer for Target J0103 from ETC: 7301 s Message in APT states that "For APT purposes, the recommended buffer time should be 2/3 of the buffer time calculated above", which would give 4867 s ------------------------------------------------------------------------------------------------------------------------------------ 16219( 3) - 23-Nov-2020 22:44:23 - [ 5] 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 | ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GALEX-J010328.6+354 1 COS/NUV ACQ/SEA PSA MIRRORB none none none none 1 N/A 730 RCH GALEX-J010328.6+354 2 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A 730 GE GALEX-J010328.6+354 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A 730 G GALEX-J010328.6+354 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A 730 G GALEX-J010328.6+354 5 COS/FUV TIME-TA PSA G130M 1291 none none none none 3 N/A 730 G GALEX-J010328.6+354 6 COS/FUV TIME-TA PSA G130M 1291 none none none none 4 N/A 730 G 16219( 3) - 23-Nov-2020 22:44:23 - [ 6] Visit: 02 (J010328 3-orbit set 1) 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 GALEX-J0103 COS/NUV ACQ/SEA PSA MIRRORB SCAN-SIZE=2, STEP-SIZE=1.767, 1 22 S (22 28.6+354730 RCH CENTER=FLUX-WT S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GALEX-J0103 COS/NUV ACQ/IMA PSA MIRRORB 1 22 S (22 28.6+354730 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 3 GALEX-J0103 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=4867 1 2168 S 28.6+354730 G (2168 S) Comments: Total Buffer for Target J0103 from ETC: 7301 s Message in APT states that "For APT purposes, the recommended buffer time should be 2/3 of the buffer time calculated above", which would give 4867 s ------------------------------------------------------------------------------------------------------------------------------------ 4 GALEX-J0103 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=4867 1 2744 S 28.6+354730 G (2744 S) Comments: Total Buffer for Target J0103 from ETC: 7301 s Message in APT states that "For APT purposes, the recommended buffer time should be 2/3 of the buffer time calculated above", which would give 4867 s ------------------------------------------------------------------------------------------------------------------------------------ 5 GALEX-J0103 COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=4867 1 2744 S 28.6+354730 G (2744 S) Comments: Total Buffer for Target J0103 from ETC: 7301 s Message in APT states that "For APT purposes, the recommended buffer time should be 2/3 of the buffer time calculated above", which would give 4867 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 | ------------------------------------------------------------------------------------------------------------------------------------ GALEX-J010328.6+354 1 COS/NUV ACQ/SEA PSA MIRRORB none none none none 1 N/A 730 RCH 16219( 3) - 23-Nov-2020 22:44:23 - [ 7] 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 | ------------------------------------------------------------------------------------------------------------------------------------ GALEX-J010328.6+354 2 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A 730 GE GALEX-J010328.6+354 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A 730 G GALEX-J010328.6+354 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A 730 G GALEX-J010328.6+354 5 COS/FUV TIME-TA PSA G130M 1291 none none none none 3 N/A 730 G 16219( 3) - 23-Nov-2020 22:44:23 - [ 8] Visit: 03 (J010328 3-orbit set 2) 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 GALEX-J0103 COS/NUV ACQ/SEA PSA MIRRORB SCAN-SIZE=2, STEP-SIZE=1.767, 1 22 S (22 28.6+354730 RCH CENTER=FLUX-WT S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GALEX-J0103 COS/NUV ACQ/IMA PSA MIRRORB 1 22 S (22 28.6+354730 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 3 GALEX-J0103 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=4867 1 2168 S 28.6+354730 G (2168 S) Comments: Total Buffer for Target J0103 from ETC: 7301 s Message in APT states that "For APT purposes, the recommended buffer time should be 2/3 of the buffer time calculated above", which would give 4867 s ------------------------------------------------------------------------------------------------------------------------------------ 4 GALEX-J0103 COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=4867 1 2744 S 28.6+354730 G (2744 S) Comments: Total Buffer for Target J0103 from ETC: 7301 s Message in APT states that "For APT purposes, the recommended buffer time should be 2/3 of the buffer time calculated above", which would give 4867 s ------------------------------------------------------------------------------------------------------------------------------------ 5 GALEX-J0103 COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=4867 1 2744 S 28.6+354730 G (2744 S) Comments: Total Buffer for Target J0103 from ETC: 7301 s Message in APT states that "For APT purposes, the recommended buffer time should be 2/3 of the buffer time calculated above", which would give 4867 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 | ------------------------------------------------------------------------------------------------------------------------------------ GALEX-J010328.6+354 1 COS/NUV ACQ/SEA PSA MIRRORB none none none none 1 N/A 730 RCH 16219( 3) - 23-Nov-2020 22:44:23 - [ 9] 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 | ------------------------------------------------------------------------------------------------------------------------------------ GALEX-J010328.6+354 2 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A 730 GE GALEX-J010328.6+354 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A 730 G GALEX-J010328.6+354 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A 730 G GALEX-J010328.6+354 5 COS/FUV TIME-TA PSA G130M 1291 none none none none 3 N/A 730 G 16219( 3) - 23-Nov-2020 22:44:23 - [ 10] Visit: 04 (J010415 2-orbit) 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 GALEX-J0104 COS/NUV ACQ/SEA PSA MIRRORB SCAN-SIZE=2, STEP-SIZE=1.767, 1 12 S (12 15.8+402243 RCH CENTER=FLUX-WT S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GALEX-J0104 COS/NUV ACQ/IMA PSA MIRRORB 1 12 S (12 15.8+402243 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 3 GALEX-J0104 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=2942 1 2266 S 15.8+402243 G (2266 S) Comments: ETC gives a buffer time of 4413s, 2/3 is 2942 s ------------------------------------------------------------------------------------------------------------------------------------ 4 GALEX-J0104 COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=2942 1 2782 S 15.8+402243 G (2782 S) Comments: ETC gives a buffer time of 4413s, 2/3 is 2942 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 | ------------------------------------------------------------------------------------------------------------------------------------ GALEX-J010415.8+402 1 COS/NUV ACQ/SEA PSA MIRRORB none none none none 1 N/A 243 RCH GALEX-J010415.8+402 2 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A 243 GE GALEX-J010415.8+402 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A 243 G GALEX-J010415.8+402 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A 243 G 16219( 3) - 23-Nov-2020 22:44:23 - [ 11] Visit: 54 (J010415 2-orbit) 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 GALEX-J0104 COS/NUV ACQ/SEA PSA MIRRORB SCAN-SIZE=2, STEP-SIZE=1.767, 1 12 S (12 15.8+402243 RCH CENTER=FLUX-WT S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GALEX-J0104 COS/NUV ACQ/IMA PSA MIRRORB 1 12 S (12 15.8+402243 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 3 GALEX-J0104 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=2942 1 2266 S 15.8+402243 G (2266 S) Comments: ETC gives a buffer time of 4413s, 2/3 is 2942 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 | ------------------------------------------------------------------------------------------------------------------------------------ GALEX-J010415.8+402 1 COS/NUV ACQ/SEA PSA MIRRORB none none none none 1 N/A 243 RCH GALEX-J010415.8+402 2 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A 243 GE GALEX-J010415.8+402 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A 243 G 16219( 3) - 23-Nov-2020 22:44:23 - [ 12] Summary Form for Proposal 16219 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, ACQ/SEARCH, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=2942, BUFFER-TIME=4867, CENTER=FLUX-WT, FP-POS=3, FP-POS=4, SCAN-SIZE=2, STEP-SIZE=1.767 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M, MIRRORB ------------------------------------------------------------------------------------------------------------------------------------ Target Names GALEX-J010328.6+354730, GALEX-J010415.8+402243 ------------------------------------------------------------------------------------------------------------------------------------