13326( 3) - 24-Jun-2013 11:23:12 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13326 Version: 3 Check-in Time: 24-Jun-2013 11:23:12 STScI Edit Number: 1 Title Zooming In on the Progenitors of Ultra-Luminous Supernovae with HST ------------------------------------------------------------------------------------ Type Cycle GO 21 ------------------------------------------------------------------------------------ Investigators Contact? PI: Ms. Ragnhild Lunnan Harvard University Y CoI: Prof. Edo Berger Harvard University N CoI: Dr. Ryan Chornock Harvard University N CoI: Prof. Alicia M. Soderberg Harvard University N CoI: Dr. Armin Rest Space Telescope Science Institute N CoI: Dr. Ryan Foley University of Illinois at Urbana - N Champaign ------------------------------------------------------------------------------------ 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 ground-based follow-up), and studies of their galactic and sub-galactic environments - the focus of this HST proposal. We propose to take advantage of HST's superb angular resolution to 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). Seven Pan-STARRS ULSN hosts will have HST imaging through our existing Cycle 19 and 20 programs, and here we propose to essentially double that sample and obtain rest-frame UV imaging of another 6 ULSN hosts (ranging in brightness from 22-25.5 mag). This will bring the Pan-STARRS sample to a comparable number as the GOODS core-collapse SNe and GRB hosts, which are also well-matched to the Pan-STARRS sample in redshift, allowing for a detailed statistical comparison between the populations. ------------------------------------------------------------------------------------ Observations Description ------------------------ We wish to image six ULSN host galaxies with HST/ACS, in filters corresponding to rest-frame UV emission. For the three lower-redshift (z~0.6) targets, we use F475W, and for the three higher-redshift targets (z~1.4) we use F814W. The magnitudes of our targets are known from ground-based imaging range from 22-25.5, and so one orbit per target is sufficient. We use a standard four-point dither pattern for better PSF subsampling. 13326( 3) - 24-Jun-2013 11:23:12 - [ 2] Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 13326( 3) - 24-Jun-2013 11:23:12 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 PS1-10AFX GALAXY, UNDESIGNATED RA=22H11M24.1600S, J2000 V = 23.70 +/- 0.1 DEC=+00D09'43.49" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 PS1-11AP GALAXY, UNDESIGNATED RA=10H48M27.7520S, J2000 V = 23.34 +/- 0.1 DEC=+57D09'9.32" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 3 PS1-11BAM GALAXY, UNDESIGNATED RA=08H41M14.1920S, J2000 V = 23.70 +/- 0.15 DEC=+44D01'56.95" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 4 PS1-11BDN GALAXY, UNDESIGNATED RA=02H25M46.2920S, J2000 V = 25.40 +/- 0.30 DEC=-05D03'56.57" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 5 PS1-12BQF GALAXY, UNDESIGNATED RA=02H24M54.6210S, J2000 V = 22.0 +/- 0.1 DEC=-04D50'22.72" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 6 PS1-12BMY GALAXY, UNDESIGNATED RA=03H34M13.1230S, J2000 V = 24.8 +/- 0.2 DEC=-26D31'17.21" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 13326( 3) - 24-Jun-2013 11:23:12 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.265 Line_Spacing 0.187 Coordinate_Frame POS-TARG Pattern_Orient 20.67 Angle_Between_Sides 69.05 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 13326( 3) - 24-Jun-2013 11:23:12 - [ 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PS1-10AFX ACS/WFC ACCUM WFC1-CTE F814W 1 550 S PATTERN 1 1 (2200 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 | ------------------------------------------------------------------------------------------------------------------------------------ PS1-10AFX 1 ACS/WFC ACCUM WFC1-CTE F814W 1 none none none 1 N/A PS1-10AFX 1 ACS/WFC ACCUM WFC1-CTE F814W 2 none none none 1 N/A PS1-10AFX 1 ACS/WFC ACCUM WFC1-CTE F814W 3 none none none 1 N/A PS1-10AFX 1 ACS/WFC ACCUM WFC1-CTE F814W 4 none none none 1 N/A 13326( 3) - 24-Jun-2013 11:23:12 - [ 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PS1-11AP ACS/WFC ACCUM WFC1-CTE F475W 1 616 S PATTERN 1 1 (2464 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 | ------------------------------------------------------------------------------------------------------------------------------------ PS1-11AP 1 ACS/WFC ACCUM WFC1-CTE F475W 1 none none none 1 N/A PS1-11AP 1 ACS/WFC ACCUM WFC1-CTE F475W 2 none none none 1 N/A PS1-11AP 1 ACS/WFC ACCUM WFC1-CTE F475W 3 none none none 1 N/A PS1-11AP 1 ACS/WFC ACCUM WFC1-CTE F475W 4 none none none 1 N/A 13326( 3) - 24-Jun-2013 11:23:12 - [ 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PS1-11BAM ACS/WFC ACCUM WFC1-CTE F814W 1 576 S PATTERN 1 1 (2304 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 | ------------------------------------------------------------------------------------------------------------------------------------ PS1-11BAM 1 ACS/WFC ACCUM WFC1-CTE F814W 1 none none none 1 N/A PS1-11BAM 1 ACS/WFC ACCUM WFC1-CTE F814W 2 none none none 1 N/A PS1-11BAM 1 ACS/WFC ACCUM WFC1-CTE F814W 3 none none none 1 N/A PS1-11BAM 1 ACS/WFC ACCUM WFC1-CTE F814W 4 none none none 1 N/A 13326( 3) - 24-Jun-2013 11:23:12 - [ 8] 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 PS1-11BDN ACS/WFC ACCUM WFC1-CTE F475W 1 550 S GS ACQ SCENARIO BASE1B3; (2200 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 | ------------------------------------------------------------------------------------------------------------------------------------ PS1-11BDN 1 ACS/WFC ACCUM WFC1-CTE F475W 1 none none none 1 N/A PS1-11BDN 1 ACS/WFC ACCUM WFC1-CTE F475W 2 none none none 1 N/A PS1-11BDN 1 ACS/WFC ACCUM WFC1-CTE F475W 3 none none none 1 N/A PS1-11BDN 1 ACS/WFC ACCUM WFC1-CTE F475W 4 none none none 1 N/A 13326( 3) - 24-Jun-2013 11:23:12 - [ 9] Visit: 05 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 PS1-12BQF ACS/WFC ACCUM WFC1-CTE F475W 1 550 S GS ACQ SCENARIO BASE1B3; (2200 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 | ------------------------------------------------------------------------------------------------------------------------------------ PS1-12BQF 1 ACS/WFC ACCUM WFC1-CTE F475W 1 none none none 1 N/A PS1-12BQF 1 ACS/WFC ACCUM WFC1-CTE F475W 2 none none none 1 N/A PS1-12BQF 1 ACS/WFC ACCUM WFC1-CTE F475W 3 none none none 1 N/A PS1-12BQF 1 ACS/WFC ACCUM WFC1-CTE F475W 4 none none none 1 N/A 13326( 3) - 24-Jun-2013 11:23:12 - [ 10] Visit: 06 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 PS1-12BMY ACS/WFC ACCUM WFC1-CTE F814W 1 556 S PATTERN 1 1 (2224 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 | ------------------------------------------------------------------------------------------------------------------------------------ PS1-12BMY 1 ACS/WFC ACCUM WFC1-CTE F814W 1 none none none 1 N/A PS1-12BMY 1 ACS/WFC ACCUM WFC1-CTE F814W 2 none none none 1 N/A PS1-12BMY 1 ACS/WFC ACCUM WFC1-CTE F814W 3 none none none 1 N/A PS1-12BMY 1 ACS/WFC ACCUM WFC1-CTE F814W 4 none none none 1 N/A 13326( 3) - 24-Jun-2013 11:23:12 - [ 11] Summary Form for Proposal 13326 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFC1-CTE ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GS ACQ SCENARIO BASE1B3, PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F475W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names PS1-10AFX, PS1-11AP, PS1-11BAM, PS1-11BDN, PS1-12BMY, PS1-12BQF ------------------------------------------------------------------------------------------------------------------------------------