14049( 2) - 02-Feb-2015 20:38:06 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14049 Version: 2 Check-in Time: 02-Feb-2015 20:38:06 STScI Edit Number: 0 Title Dust to Dust: Monitoring the Evolution of the New Class of Self-Obscured Transient ------------------------------------------------------------------------------------ Type Cycle GO 22 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. C. S. Kochanek The Ohio State University Y CoI: Mr. Scott Adams The Ohio State University N ------------------------------------------------------------------------------------ Abstract The goal of this proposal is to understand a new class of explosive transients associated with the most massive AGB stars. Today these sources are true creatures of the mid-IR, being optically invisible and very faint in the near-IR. By coarsely monitoring them with Spitzer and HST we can examine the evolution of the luminosity, dust optical depth and dust radius/temperature at a key time when their observed fluxes are approaching those of the two known progenitors. At its very simplest, if they do not stop fading in the mid-IR or start to brighten in the near-IR, then they are almost certainly examples of the theoretically expected but observationally missing electron capture supernovae (ecSNe). The exciting result from Cycle 10 is that the sources continued to fade and two are becoming substantially fainter than their progenitors. If this continues in Cycle 11, the ecSNe interpretation becomes increasingly probable. ------------------------------------------------------------------------------------ Observations Description ------------------------ Each observation is done as a 3 point line dither in F160W and F110W combined with one extra F110W exposure -- the latter is adjusted to come as close as possible to using the available time Each of the images is done as a STEP100 sequence Two of the targets, SN2002bu and SN2008S, are not placed at field center, but offset. In particular, this places another old SN in the field of view of the SN2008S observations. These pointings have all been used successfully in previous WFC3/IR observations of the targets. ------------------------------------------------------------------------------------ 14049( 2) - 02-Feb-2015 20:38:06 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SN-1999BW STAR, SUPERNOVA RA=10H19M46.8100S, J2000 V = 17.8 DEC=+45D31'35.00" Reference Frame: Other: SIMBAD Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2002BU STAR, SUPERNOVA RA=12H17M35.4000S, J2000 V = 15.5 DEC=+45D38'21.60" Reference Frame: Other: SIMBAD Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 3 SN-2008S STAR, SUPERNOVA RA=20H34M46.5000S, J2000 V = 18.79 DEC=+60D06'41.00" Reference Frame: Other: SIMBAD Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 4 NAME-NGC-300 STAR, SUPERNOVA RA=00H54M34.1600S, J2000 V = 25 -OT2008-1 DEC=-37D38'28.60" Reference Frame: Other: SIMBAD Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 14049( 2) - 02-Feb-2015 20:38:06 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-LINE-3PT Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.605 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 41.788 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 14049( 2) - 02-Feb-2015 20:38:06 - [ 4] Visit: 01 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN-1999BW WFC3/IR MULTIAC IR F160W NSAMP=11, SAMP-SEQ=STEP100 1 DEF PATTERN 1 1-2 CUM (1497.696 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-1999BW WFC3/IR MULTIAC IR F110W NSAMP=9, SAMP-SEQ=STEP100 1 DEF CUM (897.694 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SN-1999BW WFC3/IR MULTIAC IR F110W NSAMP=9, SAMP-SEQ=STEP100 1 DEF CUM (299.231 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-1999BW 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM SN-1999BW 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM SN-1999BW 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM SN-1999BW 2 WFC3/IR MULTIAC IR F110W 1 none none none 1 N/A CUM SN-1999BW 2 WFC3/IR MULTIAC IR F110W 2 none none none 1 N/A CUM SN-1999BW 2 WFC3/IR MULTIAC IR F110W 3 none none none 1 N/A CUM SN-1999BW 3 WFC3/IR MULTIAC IR F110W none none none none 1 N/A CUM 14049( 2) - 02-Feb-2015 20:38:06 - [ 5] Visit: 02 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN-2002BU WFC3/IR MULTIAC IR F160W NSAMP=11, SAMP-SEQ=STEP100 1 DEF PATTERN 1 1-2 CUM (1497.696 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2002BU WFC3/IR MULTIAC IR F110W NSAMP=9, SAMP-SEQ=STEP100 1 DEF CUM (897.694 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SN-2002BU WFC3/IR MULTIAC IR F110W NSAMP=9, SAMP-SEQ=STEP100 1 DEF CUM (299.231 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-2002BU 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM SN-2002BU 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM SN-2002BU 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM SN-2002BU 2 WFC3/IR MULTIAC IR F110W 1 none none none 1 N/A CUM SN-2002BU 2 WFC3/IR MULTIAC IR F110W 2 none none none 1 N/A CUM SN-2002BU 2 WFC3/IR MULTIAC IR F110W 3 none none none 1 N/A CUM SN-2002BU 3 WFC3/IR MULTIAC IR F110W none none none none 1 N/A CUM 14049( 2) - 02-Feb-2015 20:38:06 - [ 6] 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN-2008S WFC3/IR MULTIAC IR F160W NSAMP=11, SAMP-SEQ=STEP100 1 DEF PATTERN 1 1-2 CUM (1497.696 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2008S WFC3/IR MULTIAC IR F110W NSAMP=9, SAMP-SEQ=STEP100 1 DEF CUM (897.694 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SN-2008S WFC3/IR MULTIAC IR F110W NSAMP=10, SAMP-SEQ=STEP100 1 DEF CUM (399.232 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-2008S 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM SN-2008S 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM SN-2008S 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM SN-2008S 2 WFC3/IR MULTIAC IR F110W 1 none none none 1 N/A CUM SN-2008S 2 WFC3/IR MULTIAC IR F110W 2 none none none 1 N/A CUM SN-2008S 2 WFC3/IR MULTIAC IR F110W 3 none none none 1 N/A CUM SN-2008S 3 WFC3/IR MULTIAC IR F110W none none none none 1 N/A CUM 14049( 2) - 02-Feb-2015 20:38:06 - [ 7] Visit: 04 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NAME-NGC-30 WFC3/IR MULTIAC IR F160W NSAMP=11, SAMP-SEQ=STEP100 1 DEF PATTERN 1 1-2 0-OT2008-1 CUM (1497.696 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 NAME-NGC-30 WFC3/IR MULTIAC IR F110W NSAMP=9, SAMP-SEQ=STEP100 1 DEF 0-OT2008-1 CUM (897.694 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NAME-NGC-30 WFC3/IR MULTIAC IR F110W NSAMP=8, SAMP-SEQ=STEP100 1 DEF 0-OT2008-1 CUM (199.231 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 | ------------------------------------------------------------------------------------------------------------------------------------ NAME-NGC-300-OT2008 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A -1 CUM NAME-NGC-300-OT2008 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A -1 CUM NAME-NGC-300-OT2008 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A -1 CUM NAME-NGC-300-OT2008 2 WFC3/IR MULTIAC IR F110W 1 none none none 1 N/A -1 CUM NAME-NGC-300-OT2008 2 WFC3/IR MULTIAC IR F110W 2 none none none 1 N/A -1 CUM NAME-NGC-300-OT2008 2 WFC3/IR MULTIAC IR F110W 3 none none none 1 N/A -1 CUM NAME-NGC-300-OT2008 3 WFC3/IR MULTIAC IR F110W none none none none 1 N/A -1 CUM 14049( 2) - 02-Feb-2015 20:38:06 - [ 8] Summary Form for Proposal 14049 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=10, NSAMP=11, NSAMP=8, NSAMP=9, SAMP-SEQ=STEP100 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1-2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F110W, F160W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NAME-NGC-300-OT2008-1, SN-1999BW, SN-2002BU, SN-2008S ------------------------------------------------------------------------------------------------------------------------------------