11654( 9) - 22-Apr-2010 20:05:03 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 11654 Version: 9 Check-in Time: 22-Apr-2010 20:05:03 STScI Edit Number: 2 Title UV Studies of a Core Collapse Supernova ------------------------------------------------------------------------------------ Type Cycle GO 17 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Robert P. Kirshner Harvard University CoI: Dr. Stephane Blondin Harvard University N CoI: Mr. Peter Challis Harvard University N CoI: Dr. Roger A. Chevalier The University of Virginia N CoI: Dr. Bruno Leibundgut European Southern Observatory - Germany N CoI: Dr. Claes Fransson Stockholm University N CoI: Dr. Alicia M. Soderberg Princeton University N CoI: Dr. Jesper Sollerman Stockholm University N ------------------------------------------------------------------------------------ Abstract Observations of the UV spectrum of core collapse SNe hold unique information about nucleosynthesis, the mass loss history, shock physics and dust formation in the explosion on massive stars. This proposal aims at a detailed study of a bright core collapse SN, discovered by any of the many ongoing surveys, either a Type IIP, IIn or Ibc supernova. We will address the role of circumstellar interaction and mass loss through CNO lines in the UV, the nature of dust formation from UV line profiles and use the UV continuum as a diagnostic of non-thermal emission from the shock. The overall goal of our team is to achieve a better understanding of these objects by combining HST data with complementary ground-based observations. We have used HST to obtain UV spectra from the explosion to the nebular phase. Over the past decade, we have conducted studies of nearby SNe with HST, and we have published an extensive series of papers. When Nature provides a bright candidate, HST should be ready to respond. ------------------------------------------------------------------------------------ Observations Description ------------------------ For a type Ib/Ic SNE, we'll use visits 1, 2, 3, 4 Here is the next version of the proposal: first: here is the sn1998S spectrum from 1100-8200A this supernova , type IIn, was taken at 13 days after explosion. http://www.cfa.harvard.edu/~pchallis/sn1998S.dat I'm using it as a model/input for STIS and COS ETCs for acqusitions and exposure times. Also for brightness limit checks. 11654( 9) - 22-Apr-2010 20:05:03 - [ 2] There are various observing strategies in this programs. and I'll try to clarify them here. (I'll also add this to the observing description in the proposal). A) For a supernova without the far UV flux, but maybe bright in near UV and optical, we'll use visits 1, 2, 3, 4 which only use the STIS/CCD. The acqusition time is 1 second for a 14th mag object using STIS/CCD MIRROR+F28X50LP if acceptable, please authorize visits 1, 2, 3, 4 B) For a supernova, like sn1998S, with unknown UV flux, maybe the best and safest plan is to make an observation with the STIS/CCD/G230LB. Measure the UV flux. Use the measured UV flux, to estimate the countrate in the Far UV (down to 1000A). sn1998S was done at phase +13 days, but at earlier phases we expect the UV to be even higher. then, ask for another ToO to trigger a sequence of visits. visit 99 is a single 2 orbit visit using STIS/CCD/G230LB and STIS/CCD/G430L and is not linked to any other visit. if acceptable, please authorize visit 99 then, planning ahead we can prepare a sequence of visits that takes advantage of COS or STIS. Sequence #1 (using COS with Medium gratings (if we we signd of interstellar interaction)) visits 10, 11 for 1998S like, B =14th mag visit 10: 1 orbit COS/NUV ACQ/SEARCH/PSA 5 seconds 2x2 COS/NOV ACS/IMAGE/PSA 5 seconds COS/FUV G130M TIME-TAG 900 seconds buffer-time=1000, FP-POS=1, SEGMENT=both, exteneded=no, FLASH=yes COS/FUV G160M TIME-TAG 900 seconds buffer-time=1000, FP-POS=1, SEGMENT=both, exteneded=no, FLASH=yes visit 11: 1 orbit linked to visit 10 STIS/CCD ACQ MIRROR F28X50LP 1 second. STIS/CCD G230LB 1700 seconds cr-split=2 STIT/CCD G430L 180 seconds cr-split=no 12, 13 AFTER visit 10 by 7 to 14 days visit 11: 2 orbits COS/NUV ACQ/SEARCH/PSA 5 seconds 2x2 COS/NOV ACS/IMAGE/PSA 5 seconds COS/FUV G130M TIME-TAG 2050 seconds buffer-time=2050, FP-POS=1, SEGMENT=both, exteneded=no, FLASH=yes COS/FUV G160M TIME-TAG 2700 seconds buffer-time=3100, FP-POS=1, SEGMENT=both, exteneded=no, FLASH=yes visit 13: 1 orbit linked to visit 11 11654( 9) - 22-Apr-2010 20:05:03 - [ 3] STIS/CCD ACQ MIRROR F28X50LP 1 second. STIS/MAMA G230L 1700 seconds STIT/CCD G430L 180 seconds cr-split=no 14, 15 AFTER visit 10 by 30 to 60 days visit 14: 2 orbits COS/NUV ACQ/SEARCH/PSA 5 seconds 2x2 - ACQ time will have to be recalculated based on the light curve COS/NOV ACS/IMAGE/PSA 5 seconds COS/FUV G130M TIME-TAG 2050 seconds buffer-time=2050, FP-POS=1, SEGMENT=both, exteneded=no, FLASH=yes COS/FUV G160M TIME-TAG 2700 seconds buffer-time=3100, FP-POS=1, SEGMENT=both, exteneded=no, FLASH=yes visit 15: 1 orbit linked to visit 14 STIS/CCD ACQ MIRROR F28X50LP 1 second. ACQ time will have to be recalculated based on the light curve STIS/MAMA G230L 1700 seconds STIT/CCD G430L 180 seconds cr-split=no Sequence #2 (using COS with G140L and B = 15th mag.. too faint for COS medium disperson) visit 20, 21 visit 20: 1 orbit COS/NUV ACQ/SEARCH/PSA 12 seconds 2x2 COS/NOV ACS/IMAGE/PSA 12 seconds COS/FUV G140L TIME-TAG 2100 seconds buffer-time=2400, FP-POS=1, SEGMENT=both, exteneded=no, FLASH=yes visit 21: 1 orbit linked to visit 20 STIS/CCD ACQ MIRROR F28X50LP 1 second. STIS/MAMA G230L 1700 seconds STIT/CCD G430L 180 seconds cr-split=no visit 22, 23 AFTER 20 by 7 to 14 days visit 22: 2 orbits COS/NUV ACQ/SEARCH/PSA 12 seconds 2x2 COS/NOV ACS/IMAGE/PSA 12 seconds COS/FUV G140L TIME-TAG 2100 seconds buffer-time=3000, FP-POS=1, SEGMENT=both, exteneded=no, FLASH=yes COS/FUV G140L TIME-TAG 2600 seconds buffer-time=3000, FP-POS=2, SEGMENT=both, exteneded=no, FLASH=yes visit 23: 1 orbit linked to visit 22 STIS/CCD ACQ MIRROR F28X50LP 1 second. STIS/MAMA G230L 1700 seconds STIT/CCD G430L 180 seconds cr-split=no visit 24, 25 AFTER 20 by 30 to 60 days visit 24: 2 orbits COS/NUV ACQ/SEARCH/PSA 12 seconds 2x2 - exposure time will have to be recalculated COS/NOV ACS/IMAGE/PSA 12 seconds - exposure time will have to be recalculated 11654( 9) - 22-Apr-2010 20:05:03 - [ 4] COS/FUV G140L TIME-TAG 2100 seconds buffer-time=3000, FP-POS=1, SEGMENT=both, exteneded=no, FLASH=yes COS/FUV G140L TIME-TAG 2600 seconds buffer-time=3000, FP-POS=2, SEGMENT=both, exteneded=no, FLASH=yes visit 25: 1 orbit linked to visit 24 STIS/CCD ACQ MIRROR F28X50LP 1 second. STIS/MAMA G230L 1700 seconds STIT/CCD G430L 180 seconds cr-split=no then, visits 30, 31, 32 are just like visits 2, 3, 4 STIS/CCD only (but only 3 visits long) Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 11654( 9) - 22-Apr-2010 20:05:03 - [ 5] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 3 SN2010AL EXT-STAR, SUPERNOVA, RA=08H14M15.9100S +/- 0.1", J2000 V = 16.4 SUPERNOVA TYPE II DEC=+18D26'18.20" +/- 0.1" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 11654( 9) - 22-Apr-2010 20:05:03 - [ 6] Visit: 01 Visit Requirements: SCHED 100%; ON HOLD On Hold Comments: On hold for Target-of-opportunity Additional Comments: The Visit only uses the STIS/CCD. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN2010AL STIS/CCD ACQ F28X50LP MIRROR 1 1 S ------------------------------------------------------------------------------------------------------------------------------------ 2 SN2010AL STIS/CCD ACCUM 52X0.2 G230LB 2375 CR-SPLIT=2 1 2150 S ------------------------------------------------------------------------------------------------------------------------------------ 3 SN2010AL STIS/CCD ACCUM 52X0.2 G230LB 2375 CR-SPLIT=2 1 1800 S POS TARG 0.0, 0.5 ------------------------------------------------------------------------------------------------------------------------------------ 4 SN2010AL STIS/CCD ACCUM 52X0.2 G430L 4300 CR-SPLIT=2 1 500 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2010AL 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A SN2010AL 2 STIS/CCD ACCUM 52X0.2 G230LB 2375 none none none 1 1 N/A SN2010AL 2 STIS/CCD ACCUM 52X0.2 G230LB 2375 none none none 2 1 N/A SN2010AL 3 STIS/CCD ACCUM 52X0.2 G230LB 2375 none none none 1 2 N/A SN2010AL 3 STIS/CCD ACCUM 52X0.2 G230LB 2375 none none none 2 2 N/A SN2010AL 4 STIS/CCD ACCUM 52X0.2 G430L 4300 none none none 1 2 N/A SN2010AL 4 STIS/CCD ACCUM 52X0.2 G430L 4300 none none none 2 2 N/A 11654( 9) - 22-Apr-2010 20:05:03 - [ 7] Visit: 02 Visit Requirements: SCHED 100%; AFTER 01 BY 7 D TO 12 D; ON HOLD On Hold Comments: On hold for Target-of-opportunity Additional Comments: This visits used the STIS/MAMA . Using the STIS ETC see exposure A290509. this used sn1998S @ day 13 after explosion (very similiar object to sn2010al). this is a good upper limit. The expected flux will be lower because visit 2 will be executed at a phase of ~25 days after explosion. we don't expect any bright emission features. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN2010AL STIS/CCD ACQ F28X50LP MIRROR 1 1 S ------------------------------------------------------------------------------------------------------------------------------------ 2 SN2010AL STIS/CCD ACCUM 52X0.2 G230LB 2375 CR-SPLIT=2 1 2150 S ------------------------------------------------------------------------------------------------------------------------------------ 3 SN2010AL STIS/CCD ACCUM 52X0.2 G230LB 2375 CR-SPLIT=2 1 1800 S POS TARG 0.0, 0.5 ------------------------------------------------------------------------------------------------------------------------------------ 4 SN2010AL STIS/CCD ACCUM 52X0.2 G430L 4300 CR-SPLIT=2 1 500 S ------------------------------------------------------------------------------------------------------------------------------------ 5 SN2010AL STIS/FUV ACCUM 52X0.2 G140L 1425 1 2400 S -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2010AL 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A SN2010AL 2 STIS/CCD ACCUM 52X0.2 G230LB 2375 none none none 1 1 N/A SN2010AL 2 STIS/CCD ACCUM 52X0.2 G230LB 2375 none none none 2 1 N/A SN2010AL 3 STIS/CCD ACCUM 52X0.2 G230LB 2375 none none none 1 2 N/A SN2010AL 3 STIS/CCD ACCUM 52X0.2 G230LB 2375 none none none 2 2 N/A SN2010AL 4 STIS/CCD ACCUM 52X0.2 G430L 4300 none none none 1 2 N/A SN2010AL 4 STIS/CCD ACCUM 52X0.2 G430L 4300 none none none 2 2 N/A SN2010AL 5 STIS/FUV ACCUM 52X0.2 G140L 1425 none none none none 3 N/A -MAMA 11654( 9) - 22-Apr-2010 20:05:03 - [ 8] Visit: 03 Visit Requirements: BEFORE 01-JUN-2010:00:00:00; SEQ 03, 04 WITHIN 2 D On Hold Comments: Additional Comments: please try to schedule before the super BEFORE date of 01-Jun-2010 is preferred but can be relaxed to as late as 01-JUL-2010 if necessary. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN2010AL STIS/CCD ACQ F28X50LP MIRROR 1 2 S ------------------------------------------------------------------------------------------------------------------------------------ 2 SN2010AL STIS/CCD ACCUM F28X50LP MIRROR CR-SPLIT=2 1 90 S ------------------------------------------------------------------------------------------------------------------------------------ 3 SN2010AL STIS/CCD ACCUM 52X0.2 G230LB 2375 CR-SPLIT=2 1 2100 S ------------------------------------------------------------------------------------------------------------------------------------ 4 SN2010AL STIS/CCD ACCUM 52X0.2 G230LB 2375 CR-SPLIT=2 1 1400 S POS TARG 0, 0.25 ------------------------------------------------------------------------------------------------------------------------------------ 5 SN2010AL STIS/CCD ACCUM 52X0.2 G230LB 2375 CR-SPLIT=2 1 1300 S POS TARG 0, 0.5 ------------------------------------------------------------------------------------------------------------------------------------ 6 SN2010AL STIS/CCD ACCUM 52X0.2 G430L 4300 CR-SPLIT=2 1 900 S ------------------------------------------------------------------------------------------------------------------------------------ 7 SN2010AL STIS/CCD ACCUM 52X0.2 G430L 4300 CR-SPLIT=2 1 900 S POS TARG 0, -0.25 ------------------------------------------------------------------------------------------------------------------------------------ 8 SN2010AL STIS/CCD ACCUM 52X0.2 G750L 7751 CR-SPLIT=2 1 700 S ------------------------------------------------------------------------------------------------------------------------------------ 9 CCDFLAT STIS/CCD ACCUM 52X0.2 G750L 7751 2 10 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2010AL 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A SN2010AL 2 STIS/CCD ACCUM F28X50LP MIRROR none none none 1 1 N/A SN2010AL 2 STIS/CCD ACCUM F28X50LP MIRROR none none none 2 1 N/A SN2010AL 3 STIS/CCD ACCUM 52X0.2 G230LB 2375 none none none 1 1 N/A SN2010AL 3 STIS/CCD ACCUM 52X0.2 G230LB 2375 none none none 2 1 N/A SN2010AL 4 STIS/CCD ACCUM 52X0.2 G230LB 2375 none none none 1 2 N/A SN2010AL 4 STIS/CCD ACCUM 52X0.2 G230LB 2375 none none none 2 2 N/A SN2010AL 5 STIS/CCD ACCUM 52X0.2 G230LB 2375 none none none 1 2 N/A SN2010AL 5 STIS/CCD ACCUM 52X0.2 G230LB 2375 none none none 2 2 N/A SN2010AL 6 STIS/CCD ACCUM 52X0.2 G430L 4300 none none none 1 3 N/A SN2010AL 6 STIS/CCD ACCUM 52X0.2 G430L 4300 none none none 2 3 N/A SN2010AL 7 STIS/CCD ACCUM 52X0.2 G430L 4300 none none none 1 3 N/A SN2010AL 7 STIS/CCD ACCUM 52X0.2 G430L 4300 none none none 2 3 N/A SN2010AL 8 STIS/CCD ACCUM 52X0.2 G750L 7751 none none none 1 3 N/A SN2010AL 8 STIS/CCD ACCUM 52X0.2 G750L 7751 none none none 2 3 N/A 11654( 9) - 22-Apr-2010 20:05:03 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ CCDFLAT 9 STIS/CCD ACCUM 52X0.2 G750L 7751 none none 1 none 3 N/A CCDFLAT 9 STIS/CCD ACCUM 52X0.2 G750L 7751 none none 2 none 3 N/A 11654( 9) - 22-Apr-2010 20:05:03 - [ 10] Visit: 04 Visit Requirements: On Hold Comments: Additional Comments: I used our HST/STIS UV spectrum from April 7th as input for the COS/ETC. The ETC using MIRROR A/PSA says 28 seconds for s/n 40. For this visit, the supernova will fade about 0.7 mags in 1 month, which is about a factor of 2 in flux. I took the HST spectrum, divided by 2 and the ETC says 60 seconds for the acqusition exposure time. ASCII spectra can be downloaded here: http://www.cfa.harvard.edu/~pchallis/sn2010ale2_dividedby2.dat The FAR UV spectrum is an emission spectrum. The counts/sec at these lines is very far below the count limits of COS. we expect a s/n ~10-20 in the emission features. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN2010AL COS/NUV ACQ/SEA PSA MIRRORA SCAN-SIZE=2 1 90 S RCH ------------------------------------------------------------------------------------------------------------------------------------ 2 SN2010AL COS/FUV ACCUM PSA G140L 1105 1 1900 S ------------------------------------------------------------------------------------------------------------------------------------ 3 SN2010AL COS/FUV ACCUM PSA G140L 1105 FP-POS=2 1 2950 S Comments: I added FP-POS=2 to shift in the disersion diretion, which will help remove the fixed pattern noise. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2010AL 1 COS/NUV ACQ/SEA PSA MIRRORA none none none none 1 N/A RCH SN2010AL 2 COS/FUV ACCUM PSA G140L 1105 none none none none 1 N/A SN2010AL 3 COS/FUV ACCUM PSA G140L 1105 none none none none 2 N/A 11654( 9) - 22-Apr-2010 20:05:03 - [ 11] Summary Form for Proposal 11654 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 52X0.2, F28X50LP, PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV, STIS/CCD, STIS/FUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ, ACQ/SEARCH ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=2, FP-POS=2, SCAN-SIZE=2 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 7 D TO 12 D, BEFORE 01-JUN-2010:00:00:00, ON HOLD , POS TARG 0, -0.25, POS TARG 0, 0.25, POS TARG 0, 0.5, POS TARG 0.0, 0.5, SCHED 100%, SEQ 03, 04 WITHIN 2 D ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G140L, G230LB, G430L, G750L, MIRROR, MIRRORA ------------------------------------------------------------------------------------------------------------------------------------ Target Names CCDFLAT, SN2010AL ------------------------------------------------------------------------------------------------------------------------------------