12999( 3) - 11-Jul-2012 17:49:17 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12999 Version: 3 Check-in Time: 11-Jul-2012 17:49:17 STScI Edit Number: 0 Title Are the Progenitors of SN 2002cx-like Objects Massive Stars or White Dwarfs? ------------------------------------------------------------------------------------ Type Cycle GO 20 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Ryan Foley Smithsonian Institution Astrophysical Y Observatory CoI: Ms. Wen-fai Fong Harvard University N CoI: Dr. Saurabh W. Jha Rutgers the State University of New Jersey N CoI: Mr. Curtis McCully Rutgers the State University of New Jersey N CoI: Mr. Gautham Narayan Harvard University N CoI: Dr. Armin Rest Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract The largest class of "peculiar" supernovae (SN) is the SN 2002cx-like class. The SN are observationally similar to Type Ia SN, but with several differences that separate them into their own class. The recently discovered SN 2008ha, which is a member of the class, was extremely faint (M_V = -14.2 mag) and ejected only 0.3 M_sun of material. Despite its similarities to SN Ia, clearly it did not fully disrupt a Chandrasekhar-mass white dwarf. This discovery provoked some to question if it was the result of a massive star whose core collapsed to a black hole shortly after creation of a proto-neutron star, allowing only a small amount of ejecta to escape and creating a weak electromagnetic signature. We propose to observe the SN sites of four very nearby (D < 20 Mpc) members of this class, allowing us to resolve stars in the vicinity of the SN, and place estimates and/or limits on the mass of the progenitor star. If these SN come from massive stars, we should detect other massive stars in their neighborhood. Constraining the progenitors of these objects has far-reaching implications for stellar evolution, SN physics, metal enrichment, and black hole creation rates. This simple experiment should determine if the progenitors were massive stars or white dwarfs. ------------------------------------------------------------------------------------ Observations Description ------------------------ We plan to get ACS images of the host galaxies and immediate progenitor environments of 4 supernovae. We want BVRI photometry to properly characterize the stellar populations and dust content of the galaxies. We hope to split the time 30, 20, 20, 30% between BVRI. There are two orbit blocks for each target. For two targets (larger galaxies), we specified orientations that will maximize the galaxy on the instrument. Real Time Justification ----------------------- Calibration Justification ------------------------- 12999( 3) - 11-Jul-2012 17:49:17 - [ 2] Additional Comments ------------------- ------------------------------------------------------------------------------------ 12999( 3) - 11-Jul-2012 17:49:17 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SN-2008GE GALAXY, ELLIPTICAL RA=04H08M24.6800S +/- 0.1", J2000 V = 25 DEC=-47D53'47.40" +/- 0.1" Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2008HA GALAXY, SPIRAL RA=23H34M52.6900S +/- 0.1", J2000 V = 25 DEC=+18D13'35.40" +/- 0.1" Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 3 SN-2010AE GALAXY, SPIRAL RA=07H15M54.6500S +/- 0.1", J2000 V = 25 DEC=-57D20'36.90" +/- 0.1" Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 4 SN-2010EL GALAXY, SPIRAL RA=04H19M58.8300S +/- 0.1", J2000 V = 25 DEC=-54D56'38.50" +/- 0.1" Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 12999( 3) - 11-Jul-2012 17:49:17 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 3.011 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.28 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 12999( 3) - 11-Jul-2012 17:49:17 - [ 5] Visit: 01 Visit Requirements: SCHED 100%; ORIENT 120D TO 190 D; ORIENT 320D TO 10 D On Hold Comments: Additional Comments: Orientations were chosen to get most of the galaxy. They can be expanded, but the science will be impacted somewhat. The more of the galaxy, the better. The best angles are near 145 and 335. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN-2008GE ACS/WFC ACCUM WFC1 F435W 1 600 S PATTERN 1 1 see below ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2008GE ACS/WFC ACCUM WFC1 F555W 1 400 S PATTERN 1 2 see below ------------------------------------------------------------------------------------------------------------------------------------ 3 SN-2008GE ACS/WFC ACCUM WFC1 F814W 1 600 S PATTERN 1 3 see below ------------------------------------------------------------------------------------------------------------------------------------ 4 SN-2008GE ACS/WFC ACCUM WFC1 F625W 1 400 S PATTERN 1 4 see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN-2008GE 1 ACS/WFC ACCUM WFC1 F435W 1 none none none 1 584.0 S SN-2008GE 1 ACS/WFC ACCUM WFC1 F435W 2 none none none 1 584.0 S SN-2008GE 2 ACS/WFC ACCUM WFC1 F555W 1 none none none 1 384.0 S SN-2008GE 2 ACS/WFC ACCUM WFC1 F555W 2 none none none 1 384.0 S SN-2008GE 3 ACS/WFC ACCUM WFC1 F814W 1 none none none 2 622.0 S SN-2008GE 3 ACS/WFC ACCUM WFC1 F814W 2 none none none 2 622.0 S SN-2008GE 4 ACS/WFC ACCUM WFC1 F625W 1 none none none 2 422.0 S SN-2008GE 4 ACS/WFC ACCUM WFC1 F625W 2 none none none 2 422.0 S 12999( 3) - 11-Jul-2012 17:49:17 - [ 6] Visit: 02 Visit Requirements: SCHED 100% 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN-2008HA ACS/WFC ACCUM WFC1 F435W 1 600 S PATTERN 1 1 see below ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2008HA ACS/WFC ACCUM WFC1 F555W 1 400 S PATTERN 1 2 see below ------------------------------------------------------------------------------------------------------------------------------------ 3 SN-2008HA ACS/WFC ACCUM WFC1 F814W 1 600 S PATTERN 1 3 see below ------------------------------------------------------------------------------------------------------------------------------------ 4 SN-2008HA ACS/WFC ACCUM WFC1 F625W 1 400 S PATTERN 1 4 see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN-2008HA 1 ACS/WFC ACCUM WFC1 F435W 1 none none none 1 582.0 S SN-2008HA 1 ACS/WFC ACCUM WFC1 F435W 2 none none none 1 582.0 S SN-2008HA 2 ACS/WFC ACCUM WFC1 F555W 1 none none none 1 382.0 S SN-2008HA 2 ACS/WFC ACCUM WFC1 F555W 2 none none none 1 382.0 S SN-2008HA 3 ACS/WFC ACCUM WFC1 F814W 1 none none none 2 620.0 S SN-2008HA 3 ACS/WFC ACCUM WFC1 F814W 2 none none none 2 620.0 S SN-2008HA 4 ACS/WFC ACCUM WFC1 F625W 1 none none none 2 420.0 S SN-2008HA 4 ACS/WFC ACCUM WFC1 F625W 2 none none none 2 420.0 S 12999( 3) - 11-Jul-2012 17:49:17 - [ 7] Visit: 03 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN-2010AE ACS/WFC ACCUM WFC1 F435W 1 600 S PATTERN 1 1 see below ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2010AE ACS/WFC ACCUM WFC1 F555W 1 400 S PATTERN 1 2 see below ------------------------------------------------------------------------------------------------------------------------------------ 3 SN-2010AE ACS/WFC ACCUM WFC1 F814W 1 600 S PATTERN 1 3 see below ------------------------------------------------------------------------------------------------------------------------------------ 4 SN-2010AE ACS/WFC ACCUM WFC1 F625W 1 400 S PATTERN 1 4 see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN-2010AE 1 ACS/WFC ACCUM WFC1 F435W 1 none none none 1 701.0 S SN-2010AE 1 ACS/WFC ACCUM WFC1 F435W 2 none none none 1 701.0 S SN-2010AE 2 ACS/WFC ACCUM WFC1 F555W 1 none none none 1 501.0 S SN-2010AE 2 ACS/WFC ACCUM WFC1 F555W 2 none none none 1 501.0 S SN-2010AE 3 ACS/WFC ACCUM WFC1 F814W 1 none none none 2 739.0 S SN-2010AE 3 ACS/WFC ACCUM WFC1 F814W 2 none none none 2 739.0 S SN-2010AE 4 ACS/WFC ACCUM WFC1 F625W 1 none none none 2 539.0 S SN-2010AE 4 ACS/WFC ACCUM WFC1 F625W 2 none none none 2 539.0 S 12999( 3) - 11-Jul-2012 17:49:17 - [ 8] Visit: 04 Visit Requirements: SCHED 100%; ORIENT 140D TO 230 D On Hold Comments: Additional Comments: Orientations were chosen to get most of the galaxy. They can be expanded, but the science will be impacted somewhat. The more of the galaxy, the better. In particular, I was trying to get the bright spiral arm to the north east. The best angles are near 230. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN-2010EL ACS/WFC ACCUM WFC1 F435W 1 600 S PATTERN 1 1 see below ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2010EL ACS/WFC ACCUM WFC1 F555W 1 400 S PATTERN 1 2 see below ------------------------------------------------------------------------------------------------------------------------------------ 3 SN-2010EL ACS/WFC ACCUM WFC1 F814W 1 600 S PATTERN 1 3 see below ------------------------------------------------------------------------------------------------------------------------------------ 4 SN-2010EL ACS/WFC ACCUM WFC1 F625W 1 400 S PATTERN 1 4 see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN-2010EL 1 ACS/WFC ACCUM WFC1 F435W 1 none none none 1 584.0 S SN-2010EL 1 ACS/WFC ACCUM WFC1 F435W 2 none none none 1 584.0 S SN-2010EL 2 ACS/WFC ACCUM WFC1 F555W 1 none none none 1 384.0 S SN-2010EL 2 ACS/WFC ACCUM WFC1 F555W 2 none none none 1 384.0 S SN-2010EL 3 ACS/WFC ACCUM WFC1 F814W 1 none none none 2 622.0 S SN-2010EL 3 ACS/WFC ACCUM WFC1 F814W 2 none none none 2 622.0 S SN-2010EL 4 ACS/WFC ACCUM WFC1 F625W 1 none none none 2 422.0 S SN-2010EL 4 ACS/WFC ACCUM WFC1 F625W 2 none none none 2 422.0 S 12999( 3) - 11-Jul-2012 17:49:17 - [ 9] Summary Form for Proposal 12999 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFC1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 120D TO 190 D, ORIENT 140D TO 230 D, ORIENT 320D TO 10 D, PATTERN 1 1, PATTERN 1 2, PATTERN 1 3, PATTERN 1 4, SCHED 100% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F435W, F555W, F625W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names SN-2008GE, SN-2008HA, SN-2010AE, SN-2010EL ------------------------------------------------------------------------------------------------------------------------------------