12885( 3) - 10-Jul-2012 12:26:21 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12885 Version: 3 Check-in Time: 10-Jul-2012 12:26:21 STScI Edit Number: 0 Title Kepler's SNR: A Type Ia Supernova from a Single Degenerate System? ------------------------------------------------------------------------------------ Type Cycle GO 20 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Ravi Sankrit Universities Space Research Association Y CoI: Dr. William P. Blair The Johns Hopkins University N CoI: Dr. John C. Raymond Smithsonian Institution Astrophysical N Observatory CoI: Dr. Kazimierz J. Borkowski North Carolina State University N CoI: Dr. Stephen Reynolds North Carolina State University N CoI: Dr. Brian J. Williams North Carolina State University N CoI: Dr. Knox S. Long Space Telescope Science Institute N CoI: Dr. Daniel J. Patnaude Smithsonian Institution Astrophysical N Observatory ------------------------------------------------------------------------------------ Abstract Kepler's supernova remnant (SN1604) is now known to be the result of a Type Ia supernova explosion. The SN occurred in a region modified by the circumstellar material from the progenitor system, thus implying a likely single degenerate precursor. We request second epoch HST images of the remnant with WFC3 (first epoch was in 2003 with ACS) in order to (i) carry out a careful and accurate assessment of the proper motion of the primary blast wave and, with improved modeling of the primary shock velocity, constrain the distance to this important object, and (ii) perform a sensitive search for any possible surviving companion star to the SN progenitor that should still be present near the center of the remnant. Resolving the distance uncertainty is key to understanding the dynamics of the system and establishing an accurate explosion energy for the SN, thus putting Kepler in the context of other Type Ia SNe. Constraining the precursor system by finding or placing stringent limits on a companion star could help answer one of the key outstanding questions about Type Ia SNe: how are they produced? Our second epoch observations will also allow us to measure the kinematics and brightness changes of the radiative knots and filaments, which arise from interactions between the blast wave and the densest portions of the circumstellar medium, and hence are tied to the evolution of the progenitor system. These changes can be seen to occur at ground-based resolution on a ~10 year timescale, but our first epoch data have shown that HST angular resolution is necessary to resolve the knot structures and complexes and accurately characterize these changes. ------------------------------------------------------------------------------------ Observations Description ------------------------ WFC3 images will be obtained using two narrowband filters F656N and F658N, and four continuum filters, F336W, F438W, F547M and F814W. We will use 4 orbits for F656N, 2 orbits for F658N and 2 orbits total for the four continuum bands. All observations will use CR-SPLITS, offsets and dither patterns. 12885( 3) - 10-Jul-2012 12:26:21 - [ 2] Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- We would prefer obtaining images at the same orientation as in our Cycle 12 program. ------------------------------------------------------------------------------------ 12885( 3) - 10-Jul-2012 12:26:21 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 KEPLER-1 ISM, EMISSION LINE RA=17H30M40.8000S +/- 0.1", J2000 V = 35 4.4E-16 erg s-1 cm-2 arcsec-2 NEBULA, SNR DEC=-21D28'53.40" +/- 0.1" Faint H-alpha Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 12885( 3) - 10-Jul-2012 12:26:21 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-GAP-LINE WFC3-UVIS-DITHER-LINE Pattern_Purpose DITHER DITHER Number_Of_Points 2 2 Point_Spacing 2.414 0.145 Line_Spacing Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 85.759 46.84 Angle_Between_Sides Center_Pattern YES NO ------------------------------------------------------------------------------------------------------------------------------------ 12885( 3) - 10-Jul-2012 12:26:21 - [ 5] Visit: 01 Visit Requirements: ORIENT 75D TO 105 D; ORIENT 255D TO 285 D 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 KEPLER-1 WFC3/UVI ACCUM UVIS-CENT F814W FLASH=3 1 200 S PATTERN 3 1-2 S ER see below ------------------------------------------------------------------------------------------------------------------------------------ 2 KEPLER-1 WFC3/UVI ACCUM UVIS-CENT F656N FLASH=12, CR-SPLIT=2 1 2400 S S ER 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 | ------------------------------------------------------------------------------------------------------------------------------------ KEPLER-1 1 WFC3/UVI ACCUM UVIS-CEN F814W 1 1 none none 1 206.0 S S TER KEPLER-1 1 WFC3/UVI ACCUM UVIS-CEN F814W 1 2 none none 2 243.0 S S TER KEPLER-1 1 WFC3/UVI ACCUM UVIS-CEN F814W 2 1 none none 3 243.0 S S TER KEPLER-1 1 WFC3/UVI ACCUM UVIS-CEN F814W 2 2 none none 4 243.0 S S TER KEPLER-1 2 WFC3/UVI ACCUM UVIS-CEN F656N 1 1 none 1 1 1206.0 S S TER KEPLER-1 2 WFC3/UVI ACCUM UVIS-CEN F656N 1 1 none 2 1 1206.0 S S TER KEPLER-1 2 WFC3/UVI ACCUM UVIS-CEN F656N 1 2 none 1 2 1243.0 S S TER KEPLER-1 2 WFC3/UVI ACCUM UVIS-CEN F656N 1 2 none 2 2 1243.0 S S TER KEPLER-1 2 WFC3/UVI ACCUM UVIS-CEN F656N 2 1 none 1 3 1243.0 S S TER KEPLER-1 2 WFC3/UVI ACCUM UVIS-CEN F656N 2 1 none 2 3 1243.0 S S TER KEPLER-1 2 WFC3/UVI ACCUM UVIS-CEN F656N 2 2 none 1 4 1243.0 S S TER KEPLER-1 2 WFC3/UVI ACCUM UVIS-CEN F656N 2 2 none 2 4 1243.0 S S TER 12885( 3) - 10-Jul-2012 12:26:21 - [ 6] Visit: 02 Visit Requirements: SAME ORIENT AS 01 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 KEPLER-1 WFC3/UVI ACCUM UVIS-CENT F438W FLASH=7 1 200 S PATTERN 3 1-2 S ER see below ------------------------------------------------------------------------------------------------------------------------------------ 2 KEPLER-1 WFC3/UVI ACCUM UVIS-CENT F658N FLASH=10 1 900 S S ER 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 | ------------------------------------------------------------------------------------------------------------------------------------ KEPLER-1 1 WFC3/UVI ACCUM UVIS-CEN F438W 1 1 none none 1 260.0 S S TER KEPLER-1 1 WFC3/UVI ACCUM UVIS-CEN F438W 1 2 none none 1 260.0 S S TER KEPLER-1 1 WFC3/UVI ACCUM UVIS-CEN F438W 2 1 none none 2 287.0 S S TER KEPLER-1 1 WFC3/UVI ACCUM UVIS-CEN F438W 2 2 none none 2 287.0 S S TER KEPLER-1 2 WFC3/UVI ACCUM UVIS-CEN F658N 1 1 none none 1 960.0 S S TER KEPLER-1 2 WFC3/UVI ACCUM UVIS-CEN F658N 1 2 none none 1 960.0 S S TER KEPLER-1 2 WFC3/UVI ACCUM UVIS-CEN F658N 2 1 none none 2 987.0 S S TER KEPLER-1 2 WFC3/UVI ACCUM UVIS-CEN F658N 2 2 none none 2 987.0 S S TER 12885( 3) - 10-Jul-2012 12:26:21 - [ 7] Visit: 03 Visit Requirements: SAME ORIENT AS 01 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 KEPLER-1 WFC3/UVI ACCUM UVIS-CENT F547M FLASH=5 1 450 S PATTERN 3 1-2 S ER see below ------------------------------------------------------------------------------------------------------------------------------------ 2 KEPLER-1 WFC3/UVI ACCUM UVIS-CENT F336W FLASH=9 1 750 S S ER 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 | ------------------------------------------------------------------------------------------------------------------------------------ KEPLER-1 1 WFC3/UVI ACCUM UVIS-CEN F547M 1 1 none none 1 458.0 S S TER KEPLER-1 1 WFC3/UVI ACCUM UVIS-CEN F547M 1 2 none none 1 458.0 S S TER KEPLER-1 1 WFC3/UVI ACCUM UVIS-CEN F547M 2 1 none none 2 486.0 S S TER KEPLER-1 1 WFC3/UVI ACCUM UVIS-CEN F547M 2 2 none none 2 486.0 S S TER KEPLER-1 2 WFC3/UVI ACCUM UVIS-CEN F336W 1 1 none none 1 758.0 S S TER KEPLER-1 2 WFC3/UVI ACCUM UVIS-CEN F336W 1 2 none none 1 758.0 S S TER KEPLER-1 2 WFC3/UVI ACCUM UVIS-CEN F336W 2 1 none none 2 786.0 S S TER KEPLER-1 2 WFC3/UVI ACCUM UVIS-CEN F336W 2 2 none none 2 786.0 S S TER 12885( 3) - 10-Jul-2012 12:26:21 - [ 8] Summary Form for Proposal 12885 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS-CENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=2, FLASH=10, FLASH=12, FLASH=3, FLASH=5, FLASH=7, FLASH=9 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 255D TO 285 D, ORIENT 75D TO 105 D, PATTERN 3 1-2, SAME ORIENT AS 01 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F336W, F438W, F547M, F656N, F658N, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names KEPLER-1 ------------------------------------------------------------------------------------------------------------------------------------