14333( 4) - 05-Apr-2016 18:45:27 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14333 Version: 4 Check-in Time: 05-Apr-2016 18:45:27 STScI Edit Number: 2 Title SAINTS: Images of SN 1987A ------------------------------------------------------------------------------------ Type Cycle GO 23 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Robert P. Kirshner Harvard University Y CoI: Dr. Patrice Bouchet CEA/DSM/DAPNIA/Service d'Astrophysique N CoI: Mr. Peter Challis Harvard University Y CoI: Dr. Roger A. Chevalier The University of Virginia N CoI: Dr. Arlin Crotts Columbia University in the City of New N York CoI: Dr. John I. Danziger INAF, Osservatorio Astronomico di Trieste N CoI: Dr. Eli Dwek NASA Goddard Space Flight Center N CoI: Dr. Kevin France University of Colorado at Boulder N CoI: Prof. Claes Fransson Stockholm University N CoI: Dr. Peter Garnavich University of Notre Dame N CoI: Prof. Kevin Heng University of Bern N CoI: Dr. Josefin Larsson Royal Institute of Technology N CoI: Dr. Stephen S. Lawrence Hofstra University N CoI: Dr. Bruno Leibundgut European Southern Observatory - Germany N CoI: Prof. Peter Lundqvist Stockholm University N CoI: Dr. Seppo Mattila University of Turku N CoI: Dr. Richard McCray University of Colorado at Boulder N CoI: Prof. Nino Panagia Space Telescope Science Institute N CoI: Dr. Jason Pun University of Hong Kong N CoI: Dr. Nathan Smith University of Arizona N CoI: Dr. Jesper Sollerman Stockholm University N CoI: Dr. George Sonneborn NASA Goddard Space Flight Center N CoI: Dr. Ben E. K. Sugerman Goucher College N CoI: Dr. Nicholas B. Suntzeff Texas A & M University N CoI: Dr. J. Craig Wheeler University of Texas at Austin N ------------------------------------------------------------------------------------ Abstract SN 1987A is the great supernova of the HST era. It is the only case where we have detailed knowledge of the pre-existing structure in the circumstellar gas. It is the only case where we can observe the details of a transition from supernova to supernova remnant. An unbroken string of observations is the essential tool for detecting change and establishing a uniform legacy archive. As we have demonstrated, images reveal a wide variety of processes at work-- most notably the change in the energetics of the debris from radioactive power in the first 5000 days to X-ray illumination from the outside at the present day. We also observed the explosive eruption of "hotspots" around the circumstellar ring and are now using their time history to infer their structure. We have devised a way to image the reverse shock at both Lyman alpha and H-alpha that will help solve a riddle in the excitation of these lines and illuminate the 14333( 4) - 05-Apr-2016 18:45:27 - [ 2] hydrodynamics of the site where non-thermal processes are at work. We propose this novel UV work for the current cycle. The HST observations have a unique blend of photometric fidelity and angular resolution that also makes them the indispensable partner to ongoing X-ray, radio, and far-IR observations. ALMA provides a new way to study dust formation and the kinematics of the explosion by comparison to HST images. This HST program is a long term study: for a 25 year old remnant, we believe brief and simple annual sampling is adequate, but an ongoing commitment is essential. ------------------------------------------------------------------------------------ Observations Description ------------------------ The proposed imaging program of SN 1987A will provide continuing information on the luminosity and expansion of the debris, eruption and evolution of hotspots, and photoionization of the surrounding gas, all at the highest available spatial resolution. Summary of the proposed observations: Cycle 21: 1 orbit with F435W, F625W, 2 orbits with F657N, F502N, 4 orbits with F656N, F645N, F665N and F658N, and 3 orbits with ACS/SBC/F122M = total 10 orbits Cycle 22: 1 orbit with F435W, F625W = total 1 orbit Cycle 23: 1 orbit with F435W, F625W, 2 orbits with F657N, F502N = total 3 orbits Observations using WFC3/UVIS with filters F435W, F625W, F657N, F502N will connect with our earlier observations at similar signal-to-noise ratio (S/N) through drizzled observations. ------------------------------------------------------------------------------------ 14333( 4) - 05-Apr-2016 18:45:27 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SN-1987A EXT-STAR, SUPERNOVA RA=05H35M28.0200S, J2000 V = 20 DEC=-69D16'11.07" Reference Frame: Other: SIMBAD Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 14333( 4) - 05-Apr-2016 18:45:27 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.173 Line_Spacing 0.112 Coordinate_Frame POS-TARG Pattern_Orient 23.884 Angle_Between_Sides 81.785 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 14333( 4) - 05-Apr-2016 18:45:27 - [ 5] Visit: 01 Visit Requirements: BETWEEN 01-MAY-2016:00:00:00 AND 31-JUL-2016:00:00:00 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 SN-1987A WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=12 1 150 S (600 PATTERN 1 1-2 S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-1987A WFC3/UVI ACCUM UVIS2-C51 F625W FLASH=8 1 150 S (600 S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SN-1987A WFC3/UVI ACCUM UVIS2-C51 F645N FLASH=12 1 600 S PATTERN 1 3-5 S 2C-SUB (2400 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SN-1987A WFC3/UVI ACCUM UVIS2-C51 F657N FLASH=12 1 600 S S 2C-SUB (2400 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 SN-1987A WFC3/UVI ACCUM UVIS2-C51 F502N FLASH=12 1 600 S S 2C-SUB (2400 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN-1987A 1 WFC3/UVI ACCUM UVIS2-C5 F438W 1 none none none 1 N/A S 12C-SUB SN-1987A 1 WFC3/UVI ACCUM UVIS2-C5 F438W 2 none none none 1 N/A S 12C-SUB SN-1987A 1 WFC3/UVI ACCUM UVIS2-C5 F438W 3 none none none 1 N/A S 12C-SUB SN-1987A 1 WFC3/UVI ACCUM UVIS2-C5 F438W 4 none none none 1 N/A S 12C-SUB SN-1987A 2 WFC3/UVI ACCUM UVIS2-C5 F625W 1 none none none 1 N/A S 12C-SUB SN-1987A 2 WFC3/UVI ACCUM UVIS2-C5 F625W 2 none none none 1 N/A S 12C-SUB SN-1987A 2 WFC3/UVI ACCUM UVIS2-C5 F625W 3 none none none 1 N/A S 12C-SUB SN-1987A 2 WFC3/UVI ACCUM UVIS2-C5 F625W 4 none none none 1 N/A S 12C-SUB SN-1987A 3 WFC3/UVI ACCUM UVIS2-C5 F645N 1 none none none 1 N/A S 12C-SUB SN-1987A 3 WFC3/UVI ACCUM UVIS2-C5 F645N 2 none none none 2 N/A S 12C-SUB 14333( 4) - 05-Apr-2016 18:45:27 - [ 6] 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-1987A 3 WFC3/UVI ACCUM UVIS2-C5 F645N 3 none none none 2 N/A S 12C-SUB SN-1987A 3 WFC3/UVI ACCUM UVIS2-C5 F645N 4 none none none 3 N/A S 12C-SUB SN-1987A 4 WFC3/UVI ACCUM UVIS2-C5 F657N 1 none none none 1 N/A S 12C-SUB SN-1987A 4 WFC3/UVI ACCUM UVIS2-C5 F657N 2 none none none 2 N/A S 12C-SUB SN-1987A 4 WFC3/UVI ACCUM UVIS2-C5 F657N 3 none none none 3 N/A S 12C-SUB SN-1987A 4 WFC3/UVI ACCUM UVIS2-C5 F657N 4 none none none 3 N/A S 12C-SUB SN-1987A 5 WFC3/UVI ACCUM UVIS2-C5 F502N 1 none none none 2 N/A S 12C-SUB SN-1987A 5 WFC3/UVI ACCUM UVIS2-C5 F502N 2 none none none 2 N/A S 12C-SUB SN-1987A 5 WFC3/UVI ACCUM UVIS2-C5 F502N 3 none none none 3 N/A S 12C-SUB SN-1987A 5 WFC3/UVI ACCUM UVIS2-C5 F502N 4 none none none 3 N/A S 12C-SUB 14333( 4) - 05-Apr-2016 18:45:27 - [ 7] Summary Form for Proposal 14333 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS2-C512C-SUB ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=12, FLASH=8 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 01-MAY-2016:00:00:00 AND 31-JUL-2016:00:00:00, PATTERN 1 1-2, PATTERN 1 3-5 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F438W, F502N, F625W, F645N, F657N ------------------------------------------------------------------------------------------------------------------------------------ Target Names SN-1987A ------------------------------------------------------------------------------------------------------------------------------------