17497( 6) - 08-Dec-2023 16:52:35 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17497 Version: 6 Check-in Time: 08-Dec-2023 16:52:35 STScI Edit Number: 0 Title UV CSM Interaction in the extremely nearby SN 2023ixf in M101 ------------------------------------------------------------------------------------ Type Cycle GO 31 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Stefano Valenti University of California - Davis Y CoI: Dr. Kyra Azalee Bostroem University of Arizona N CoI: Prof. David J. Sand University of Arizona N CoI: Dr. Griffin Hosseinzadeh University of Arizona N CoI: Dr. Jennifer Andrews Gemini Observatory N CoI: Jeniveve Pearson University of Arizona N CoI: Mr. Nicolas Eduardo Meza Retamal University of California - Davis N CoI: Dr. Jacob Jencson The Johns Hopkins University N CoI: Mr. Yize Dong University of California - Davis N CoI: Dr. Michael Jon Lundquist California Association for Research in N Astronomy (CARA) ------------------------------------------------------------------------------------ Abstract The 2023 May 19 explosion of SN2023ixf in the nearby (~6.4 Mpc) spiral galaxy M101 has presented us with a once in an HST-lifetime chance to get a comprehensive NUV to NIR dataset of an interacting core collapse supernova. This non-disruptive ToO will be complementary to two already approved Cycle 30 proposals which have been triggered on this object. We will observe SN~2023ixf between 100 and 200 days after explosion to constrain any CSM interaction with CSM interaction. Late UV observations are the best way to constrain interaction for typical RSG mass loss rates. With only a handful of core-collapse supernovae observed in the ultraviolet with HST, and almost all within 3 weeks of explosion, this proposal fills a crucial gap in our knowledge of the evolution of core-collapse supernovae in the ultraviolet. This can only be done with HST, and only with a SN that is this close can we probe the UV far into time periods when the flux has normally faded significantly. ------------------------------------------------------------------------------------ Observations Description ------------------------ This proposal will be triggered on SN 2023ixf a nearby SN discovered on 19 May 2023. We will observe the SN with STIS FUV-MAMA G140L observation with the 52x0.2" slit and STIS NUV-MAMA G230L observation with the 52x0.2" slit. The observations will be triggered beween October and November 2023 in the first window of observation. The PCR 92628 for HST program 17497 has been appoved and this proposal can be triggered in cycle 30. ------------------------------------------------------------------------------------ 17497( 6) - 08-Dec-2023 16:52:35 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SN2023IXF EXT-STAR, SUPERNOVA RA=14H03M38.5640S, J2000 V = 19 TYPE II DEC=+54D18'42.00" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 SN2023IXF-CO EXT-STAR, SUPERNOVA RA=14H03M38.5640S +/- 0.2", J2000 V = 19 S TYPE II DEC=+54D18'42.00" +/- 0.2" Reference Frame: ICRS Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 17497( 6) - 08-Dec-2023 16:52:35 - [ 3] Visit: 01 (nebular) Visit Requirements: SCHED 100%; BETWEEN 01-OCT-2023:00:00:00 AND 01-JAN-2024:00:00:00; TOO RESPONSE TIME 21.0D 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 SN2023IXF STIS/CCD ACQ F28X50LP MIRROR 1 5 S (5 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN2023IXF STIS/FUV ACCUM 52X0.2 G140L 1425 1 3000 S -MAMA see below (1994 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SN2023IXF STIS/FUV ACCUM 52X0.2 G140L 1425 1 3000 S -MAMA see below (2506 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SN2023IXF STIS/FUV ACCUM 52X0.2 G140L 1425 1 3000 S -MAMA see below (2506 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 SN2023IXF STIS/FUV ACCUM 52X0.2 G140L 1425 1 3000 S -MAMA see below (2506 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2023IXF 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A SN2023IXF 2 STIS/FUV ACCUM 52X0.2 G140L 1425 none none none none 1 1994.0 S -MAMA SN2023IXF 3 STIS/FUV ACCUM 52X0.2 G140L 1425 none none none none 2 2506.0 S -MAMA SN2023IXF 4 STIS/FUV ACCUM 52X0.2 G140L 1425 none none none none 3 2506.0 S -MAMA SN2023IXF 5 STIS/FUV ACCUM 52X0.2 G140L 1425 none none none none 4 2506.0 S -MAMA 17497( 6) - 08-Dec-2023 16:52:35 - [ 4] Visit: 02 (nebular) Visit Requirements: SCHED 100%; BETWEEN 01-OCT-2023:00:00:00 AND 01-JAN-2024:00:00:00; TOO RESPONSE TIME 21.0D 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 SN2023IXF STIS/CCD ACQ F28X50LP MIRROR 1 5 S (5 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN2023IXF STIS/NUV ACCUM 52X0.2 G230L 2376 1 3000 S -MAMA see below (1994 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SN2023IXF STIS/NUV ACCUM 52X0.2 G230L 2376 1 3000 S -MAMA see below (2506 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SN2023IXF STIS/NUV ACCUM 52X0.2 G230L 2376 1 3000 S -MAMA see below (2506 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2023IXF 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A SN2023IXF 2 STIS/NUV ACCUM 52X0.2 G230L 2376 none none none none 1 1994.0 S -MAMA SN2023IXF 3 STIS/NUV ACCUM 52X0.2 G230L 2376 none none none none 2 2506.0 S -MAMA SN2023IXF 4 STIS/NUV ACCUM 52X0.2 G230L 2376 none none none none 3 2506.0 S -MAMA 17497( 6) - 08-Dec-2023 16:52:35 - [ 5] Visit: 03 (nebular-COS-NUV) Visit Requirements: SCHED 100%; BETWEEN 01-OCT-2023:00:00:00 AND 01-JAN-2024:00:00:00; TOO RESPONSE TIME 21.0D 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 SN2023IXF-C COS/NUV ACQ/IMA PSA MIRRORA 1 5 S (5 S) OS GE ------------------------------------------------------------------------------------------------------------------------------------ 2 SN2023IXF-C COS/NUV TIME-TA PSA G230L 2635 BUFFER-TIME=1142, FP-POS=3 1 1700 S OS G (1700 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SN2023IXF-C COS/NUV TIME-TA PSA G230L 3000 BUFFER-TIME=1178, FP-POS=3 1 337 S (337 OS G S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SN2023IXF-C COS/NUV TIME-TA PSA G230L 2950 BUFFER-TIME=1164, FP-POS=3 1 1700 S OS G (1700 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 SN2023IXF-C COS/NUV TIME-TA PSA G230L 3000 BUFFER-TIME=1178, FP-POS=3 1 629 S (629 OS G S) ------------------------------------------------------------------------------------------------------------------------------------ 6 SN2023IXF-C COS/NUV TIME-TA PSA G230L 3360 BUFFER-TIME=1183, FP-POS=3 1 1700 S OS G (1700 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 SN2023IXF-C COS/NUV TIME-TA PSA G230L 3000 BUFFER-TIME=1178, FP-POS=3 1 638 S (638 OS G 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2023IXF-COS 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE SN2023IXF-COS 2 COS/NUV TIME-TA PSA G230L 2635 none none none none 1 N/A G SN2023IXF-COS 3 COS/NUV TIME-TA PSA G230L 3000 none none none none 1 N/A G SN2023IXF-COS 4 COS/NUV TIME-TA PSA G230L 2950 none none none none 2 N/A G SN2023IXF-COS 5 COS/NUV TIME-TA PSA G230L 3000 none none none none 2 N/A G SN2023IXF-COS 6 COS/NUV TIME-TA PSA G230L 3360 none none none none 3 N/A G SN2023IXF-COS 7 COS/NUV TIME-TA PSA G230L 3000 none none none none 3 N/A G 17497( 6) - 08-Dec-2023 16:52:35 - [ 6] Summary Form for Proposal 17497 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 52X0.2, F28X50LP, PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/NUV, STIS/CCD, STIS/FUV-MAMA, STIS/NUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ, ACQ/IMAGE, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=1142, BUFFER-TIME=1164, BUFFER-TIME=1178, BUFFER-TIME=1183, FP-POS=3 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 01-OCT-2023:00:00:00 AND 01-JAN-2024:00:00:00, SCHED 100%, TOO RESPONSE TIME 21.0D ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G140L, G230L, MIRROR, MIRRORA ------------------------------------------------------------------------------------------------------------------------------------ Target Names SN2023IXF, SN2023IXF-COS ------------------------------------------------------------------------------------------------------------------------------------