J/ApJ/760/L33 Photometry of the Ic supernova PTF12gzk (Ben-Ami+, 2012)
Discovery and early multi-wavelength measurements of the energetic type Ic
supernova PTF12gzk: a massive-star explosion in a dwarf host galaxy.
Ben-Ami S., Gal-Yam A., Filippenko A.V., Mazzali P.A., Modjaz M., Yaron O.,
Arcavi I., Cenko S.B., Horesh A., Howell D.A., Graham M.L., Horst J.C.,
Im M., Jeon Y., Kulkarni S.R., Leonard D.C., Perley D., Pian E., Sand D.J.,
Sullivan M., Becker J.C., Bersier D., Bloom J.S., Bottom M., Brown P.J.,
Clubb K.I., Dilday B., Dixon R.C., Fortinsky A.L., Fox D.B., Gonzalez L.A.,
Harutyunyan A., Kasliwal M.M., Li W., Malkan M.A., Manulis I., Matheson T.,
Moskovitz N.A., Muirhead P.S., Nugent P.E., Ofek E.O., Quimby R.M.,
Richards J.W., Ross N.R., Searcy K.J., Silverman J.M., Smith N.,
Vanderburg A., Walker E.S.
<Astrophys. J., 760, L33 (2012)>
=2012ApJ...760L..33B 2012ApJ...760L..33B
ADC_Keywords: Photometry, UBVRI ; Photometry, ugriz ; Photometry, infrared ;
Supernovae
Keywords: supernovae: general; supernovae: individual: PTF12gzk
Abstract:
We present the discovery and extensive early-time observations of the
Type Ic supernova (SN) PTF12gzk. Our light curves show a rise of
0.8mag within 2.5hr. Power-law fits (f(t)∝(t-t0)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 (∼30000km/s 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 25-35M☉ and a large ((5-10)x1051erg)
kinetic energy, the later being close to the regime of GRB-SN
properties.
Description:
Optical photometry of PTF12gzk was obtained using multiple telescopes
(Table 1). All data were calibrated with respect to the Sloan Digital
Sky Survey (SDSS) catalog.
Objects:
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RA (ICRS) DE Designation(s)
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22 12 41.53 +00 30 43.1 PTF12gzk = LSQ 12dwl
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 42 196 PTF12gzk photometry
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See also:
J/ApJ/741/97 : Light curves of Ibc supernovae (Drout+, 2011)
J/ApJ/736/159 : Photometry monitoring of the SN PTF10vdl (Gal-Yam+, 2011)
J/other/Nat/463.513 : Radio observations of SN 2009bb (Soderberg+, 2010)
J/MNRAS/383/1485 : BVRI light curves of SN 2003jd (Valenti+, 2008)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d JD Julian Date of the observation
14- 23 A10 --- Inst Instrument used (FTS, KAIT, Kraar, LT, MLO,
P48+CFH12k, P60, Swift, UKIRT, WISE or WISE-LAIWO)
25- 28 A4 --- Filt Filter used (UBVRI, griz, JHKY, UVM2, UVW2 or UVw1)
30- 36 F7.4 mag mag [14.5/20.7] Observed magnitude in Filter
38- 42 F5.3 mag e_mag [0.005/0.2] The 1σ uncertainty in mag
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 31-Jul-2014