A Caltech Library Service

Discovery and Early Multi-wavelength Measurements of the Energetic Type Ic Supernova PTF12gzk: A Massive-star Explosion in a Dwarf Host Galaxy

Ben-Ami, Sagi and Horesh, Assaf and Kulkarni, Shrinivas R. and Perley, Daniel A. and Becker, Juliette C. and Bottom, Michael and Muirhead, Philip S. and Kasliwal, M. M. (2012) Discovery and Early Multi-wavelength Measurements of the Energetic Type Ic Supernova PTF12gzk: A Massive-star Explosion in a Dwarf Host Galaxy. Astrophysical Journal Letters, 760 (2). Art. No. L33. ISSN 2041-8205. doi:10.1088/2041-8205/760/2/L33.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


We present the discovery and extensive early-time observations of the Type Ic supernova (SN) PTF12gzk. Our light curves show a rise of 0.8 mag within 2.5 hr. Power-law fits (f(t)α(t – t_0)^n ) to these data constrain the explosion date to within one day. We cannot rule out a quadratic fireball model, but higher values of n are possible as well for larger areas in the fit parameter space. Our bolometric light curve and a dense spectral sequence are used to estimate the physical parameters of the exploding star and of the explosion. We show that the photometric evolution of PTF12gzk is slower than that of most SNe Ic. The high ejecta expansion velocities we measure (~30, 000 km s^(–1) derived from line minima four days after explosion) are similar to the observed velocities of broad-lined SNe Ic associated with gamma-ray bursts (GRBs) rather than to normal SN Ic velocities. Yet, this SN does not show the persistent broad lines that are typical of broad-lined SNe Ic. The host-galaxy characteristics are also consistent with GRB-SN hosts, and not with normal SN Ic hosts. By comparison with the spectroscopically similar SN 2004aw, we suggest that the observed properties of PTF12gzk indicate an initial progenitor mass of 25-35 M_☉ and a large ((5-10) × 10^(51) erg) kinetic energy, the later being close to the regime of GRB-SN properties.

Item Type:Article
Related URLs:
URLURL TypeDescription
Ben-Ami, Sagi0000-0001-6760-3074
Horesh, Assaf0000-0002-5936-1156
Kulkarni, Shrinivas R.0000-0001-5390-8563
Perley, Daniel A.0000-0001-8472-1996
Becker, Juliette C.0000-0002-7733-4522
Bottom, Michael0000-0003-1341-5531
Muirhead, Philip S.0000-0002-0638-8822
Kasliwal, M. M.0000-0002-5619-4938
Additional Information:© 2012 American Astronomical Society. Received 2012 August 28; accepted 2012 October 23; published 2012 November 9. S.B. is supported by a Ramon Fellowship from ISA. A.G. acknowledges support by grants from the ISF, BSF, GIF, Minerva, and the EU FP7/ERC. A.V.F. and his group benefit from financial assistance from Gary & Cynthia Bengier, the Richard & Rhoda Goldman Fund, the Sylvia & Jim Katzman Foundation, the Christopher R. Redlich Fund, the TABASGO Foundation, NSF grants AST-0908886 and AST-1211916, and NASA/HST grant GO-12530 from STScI (which is operated by the AURA, Inc., under NASA contract NAS 05-26555). P.A.M. and E.P. acknowledge financial support from grants INAF PRIN 2011 and ASI/INAF I/088/06/0. M.I. and Y.J. were supported by the Creative Initiative program of the NRFK. M.M.K. acknowledges Hubble and Carnegie-Princeton Fellowships. D.C.L. is supported by NSF grant AST-1009571. E.O.O. acknowledges the Arye Dissentshik career development chair and a grant from the Israeli MOST. PTF is a collaboration of Caltech, LCOGT, the Weizmann Institute, LBNL/NERSC, Oxford, Columbia, IPAC, and UC Berkeley. We are grateful for the assistance of the staff at the various observatories used to obtain data. This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by JPL, Caltech, under contract with NASA.
Group:Palomar Transient Factory
Funding AgencyGrant Number
Israel Science FoundationUNSPECIFIED
Binational Science Foundation (USA-Israel)UNSPECIFIED
German-Israeli Foundation for Research and DevelopmentUNSPECIFIED
European Research Council (ERC)UNSPECIFIED
Gary and Cynthia BengierUNSPECIFIED
Richard and Rhoda Goldman FundUNSPECIFIED
Sylvia and Jim Katzman FoundationUNSPECIFIED
Christopher R. Redlich FundUNSPECIFIED
NASANAS 5-26555
Istituto Nazionale di Astrofisica (INAF)I/088/06/0
Agenzia Spaziale Italiana (ASI)UNSPECIFIED
National Research Foundation of KoreaUNSPECIFIED
Carnegie-Princeton FellowshipUNSPECIFIED
Ministry of Science and Technology (Israel)UNSPECIFIED
Subject Keywords:supernovae: general supernovae: individual (PTF12gzk)
Issue or Number:2
Record Number:CaltechAUTHORS:20130115-153632924
Persistent URL:
Official Citation:Discovery and Early Multi-wavelength Measurements of the Energetic Type Ic Supernova PTF12gzk: A Massive-star Explosion in a Dwarf Host Galaxy Sagi Ben-Ami et al. 2012 ApJ 760 L33
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36406
Deposited By: Ruth Sustaita
Deposited On:16 Jan 2013 00:01
Last Modified:09 Nov 2021 23:22

Repository Staff Only: item control page