13022( 2) - 03-Jul-2012 21:51:34 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13022 Version: 2 Check-in Time: 03-Jul-2012 21:51:34 STScI Edit Number: 0 Title Staring into the Beasts' Lair: HST Observations of the Host Galaxies of Pan-STARRS Ultra-luminous Supernovae ------------------------------------------------------------------------------------ Type Cycle GO 20 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Edo Berger Harvard University Y CoI: Dr. Ryan Chornock Harvard University N CoI: Ms. Ragnhild Lunnan Harvard University N CoI: Prof. Alicia M. Soderberg Harvard University N CoI: Dr. Laura Chomiuk Smithsonian Institution Astrophysical N Observatory CoI: Dr. Ryan Foley Smithsonian Institution Astrophysical N Observatory CoI: Dr. Armin Rest Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract The advent of wide-field optical time-domain surveys is providing an opportunity to discover and decipher new classes of astronomical transient phenomena. One of the most unexpected results from Pan-STARRS and other time-domain surveys is the discovery of ultra-luminous supernovae (ULSNe), with bolometric luminosities up to 100 times higher than normal core-collapse and Type Ia supernovae (SNe), and with spectra that do not match known SN classes. These ULSNe represent a new challenge to our understanding of the deaths of massive stars, the standard core-collapse picture, and the mechanism for powering optical emission in SNe. Progress in our understanding of these mysterious explosions requires detailed studies of their light curves and spectra (available from our Pan-STARRS data and follow-up), and studies of their galactic and sub-galactic environments - the focus of this HST proposal. Here we propose rest-frame UV and optical observations of 5 Pan-STARRS ULSNe at z~1-1.5, whose hosts remain undetected from the ground to limits of r, i~25 mag. The observations will reach about 0.02 L* in the UV/optical (SFR~0.2 Msun/yr and M*~10^9 Msun), comparable to the least luminous hosts of GRBs and SNe. Taking advantage of HST's angular resolution we will also study the locations of the ULSNe relative to their host UV light distribution as a probe of the progenitor population (similar studies of GRBs and core-collapse SNe suggest distinct types of massive star progenitors). Thus, with a modest allocation of 8 HST orbits (combined with existing data on the transients from Pan-STARRS), we will begin to address one of the key new mysteries in time-domain astrophysics. ------------------------------------------------------------------------------------ Observations Description ------------------------ Our targets are five ULSN host galaxies, at redshifts 0.9-1.4, that are undetected from the ground to a limit r, i>25 mag. We aim to image each target in two filters, corresponding to rest-frame UV and optical emission. Two of our targets are at redshift ~0.9, and we use ACS/WFC F606W and F850LP as our two filters, fit into a single orbit for each target, doing a two-point 13022( 2) - 03-Jul-2012 21:51:34 - [ 2] dither in each filter. Our remaining three targets are at slightly higher redshifts (1.2-1.4), and so we do one orbit with ACS/WFC F606W to get rest-frame UV, and one orbit with WFC3/IR F110W to get the rest-frame optical, using a standard box dither pattern for each for optimal PSF subsampling. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 13022( 2) - 03-Jul-2012 21:51:34 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 PS1-10AWH GALAXY, UNDESIGNATED RA=22H14M29.8310S +/- 0.1", J2000 Z = r>25 DEC=-00D04'3.62" +/- 0.1" 0.909 Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 PS1-10KY GALAXY, UNDESIGNATED RA=22H13M37.8510S +/- 0.1", J2000 Z = r>25 DEC=+01D14'23.57" +/- 0.1" 0.956 Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 3 PS1-10PM GALAXY, UNDESIGNATED RA=12H12M42.2000S +/- 0.1", J2000 Z = 1.2 r>25 DEC=+46D59'29.48" +/- 0.1" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 4 PS1-11TT GALAXY, UNDESIGNATED RA=16H12M45.7780S +/- 0.1", J2000 Z = r>25 DEC=+54D04'16.96" +/- 0.1" 1.283 Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 5 PS1-11AFV GALAXY, UNDESIGNATED RA=12H15M37.7700S +/- 0.1", J2000 Z = r>25 DEC=+48D10'48.62" +/- 0.1" 1.407 Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 13022( 2) - 03-Jul-2012 21:51:34 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.264 Line_Spacing 0.185 Coordinate_Frame POS-TARG Pattern_Orient 20.86 Angle_Between_Sides 69.07 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.149 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 34.25 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-BOX-MIN Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.572 Line_Spacing 0.365 Coordinate_Frame POS-TARG Pattern_Orient 18.528 Angle_Between_Sides 74.653 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 13022( 2) - 03-Jul-2012 21:51:34 - [ 5] 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PS1-10AWH ACS/WFC ACCUM WFC1-CTE F606W 1 340 S PATTERN 2 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 PS1-10AWH ACS/WFC ACCUM WFC1-CTE F850LP 1 740 S PATTERN 2 2 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ PS1-10AWH 1 ACS/WFC ACCUM WFC1-CTE F606W 1 none none none 1 N/A PS1-10AWH 1 ACS/WFC ACCUM WFC1-CTE F606W 2 none none none 1 N/A PS1-10AWH 2 ACS/WFC ACCUM WFC1-CTE F850LP 1 none none none 1 N/A PS1-10AWH 2 ACS/WFC ACCUM WFC1-CTE F850LP 2 none none none 1 N/A 13022( 2) - 03-Jul-2012 21:51:34 - [ 6] 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PS1-10KY ACS/WFC ACCUM WFC1-CTE F606W 1 340 S PATTERN 2 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 PS1-10KY ACS/WFC ACCUM WFC1-CTE F850LP 1 740 S PATTERN 2 2 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ PS1-10KY 1 ACS/WFC ACCUM WFC1-CTE F606W 1 none none none 1 N/A PS1-10KY 1 ACS/WFC ACCUM WFC1-CTE F606W 2 none none none 1 N/A PS1-10KY 2 ACS/WFC ACCUM WFC1-CTE F850LP 1 none none none 1 N/A PS1-10KY 2 ACS/WFC ACCUM WFC1-CTE F850LP 2 none none none 1 N/A 13022( 2) - 03-Jul-2012 21:51:34 - [ 7] Visit: 03 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 PS1-10PM ACS/WFC ACCUM WFC1-CTE F606W 1 490 S PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ PS1-10PM 1 ACS/WFC ACCUM WFC1-CTE F606W 1 none none none 1 N/A PS1-10PM 1 ACS/WFC ACCUM WFC1-CTE F606W 2 none none none 1 N/A PS1-10PM 1 ACS/WFC ACCUM WFC1-CTE F606W 3 none none none 1 N/A PS1-10PM 1 ACS/WFC ACCUM WFC1-CTE F606W 4 none none none 1 N/A 13022( 2) - 03-Jul-2012 21:51:34 - [ 8] Visit: 04 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 PS1-11TT ACS/WFC ACCUM WFC1-CTE F606W 1 490 S PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ PS1-11TT 1 ACS/WFC ACCUM WFC1-CTE F606W 1 none none none 1 N/A PS1-11TT 1 ACS/WFC ACCUM WFC1-CTE F606W 2 none none none 1 N/A PS1-11TT 1 ACS/WFC ACCUM WFC1-CTE F606W 3 none none none 1 N/A PS1-11TT 1 ACS/WFC ACCUM WFC1-CTE F606W 4 none none none 1 N/A 13022( 2) - 03-Jul-2012 21:51:34 - [ 9] Visit: 05 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 PS1-11AFV ACS/WFC ACCUM WFC1-CTE F606W 1 490 S PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ PS1-11AFV 1 ACS/WFC ACCUM WFC1-CTE F606W 1 none none none 1 N/A PS1-11AFV 1 ACS/WFC ACCUM WFC1-CTE F606W 2 none none none 1 N/A PS1-11AFV 1 ACS/WFC ACCUM WFC1-CTE F606W 3 none none none 1 N/A PS1-11AFV 1 ACS/WFC ACCUM WFC1-CTE F606W 4 none none none 1 N/A 13022( 2) - 03-Jul-2012 21:51:34 - [ 10] Visit: 06 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 PS1-10PM WFC3/IR MULTIAC IR F110W SAMP-SEQ=SPARS50, NSAMP=13 1 DEF PATTERN 3 1 CUM ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ PS1-10PM 1 WFC3/IR MULTIAC IR F110W 1 none none none 1 N/A CUM PS1-10PM 1 WFC3/IR MULTIAC IR F110W 2 none none none 1 N/A CUM PS1-10PM 1 WFC3/IR MULTIAC IR F110W 3 none none none 1 N/A CUM PS1-10PM 1 WFC3/IR MULTIAC IR F110W 4 none none none 1 N/A CUM 13022( 2) - 03-Jul-2012 21:51:34 - [ 11] Visit: 07 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 PS1-11TT WFC3/IR MULTIAC IR F110W SAMP-SEQ=SPARS50, NSAMP=13 1 DEF PATTERN 3 1 CUM ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ PS1-11TT 1 WFC3/IR MULTIAC IR F110W 1 none none none 1 N/A CUM PS1-11TT 1 WFC3/IR MULTIAC IR F110W 2 none none none 1 N/A CUM PS1-11TT 1 WFC3/IR MULTIAC IR F110W 3 none none none 1 N/A CUM PS1-11TT 1 WFC3/IR MULTIAC IR F110W 4 none none none 1 N/A CUM 13022( 2) - 03-Jul-2012 21:51:34 - [ 12] Visit: 08 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 PS1-11AFV WFC3/IR MULTIAC IR F110W SAMP-SEQ=SPARS50, NSAMP=13 1 DEF PATTERN 3 1 CUM ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ PS1-11AFV 1 WFC3/IR MULTIAC IR F110W 1 none none none 1 N/A CUM PS1-11AFV 1 WFC3/IR MULTIAC IR F110W 2 none none none 1 N/A CUM PS1-11AFV 1 WFC3/IR MULTIAC IR F110W 3 none none none 1 N/A CUM PS1-11AFV 1 WFC3/IR MULTIAC IR F110W 4 none none none 1 N/A CUM 13022( 2) - 03-Jul-2012 21:51:34 - [ 13] Summary Form for Proposal 13022 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR, WFC1-CTE ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=13, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, PATTERN 2 1, PATTERN 2 2, PATTERN 3 1, SCHED 100% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F110W, F606W, F850LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names PS1-10AWH, PS1-10KY, PS1-10PM, PS1-11AFV, PS1-11TT ------------------------------------------------------------------------------------------------------------------------------------