J/ApJ/747/L5 R-band observations of PTF 10vgv (Corsi+, 2012)
Evidence for a compact Wolf-Rayet progenitor for the type Ic supernova
PTF 10vgv.
Corsi A., Ofek E.O., Gal-Yam A., Frail D.A., Poznanski D., Mazzali P.A.,
Kulkarni S.R., Kasliwal M.M., Arcavi I., Ben-Ami S., Cenko S.B.,
Filippenko A.V., Fox D.B., Horesh A., Howell J.L., Kleiser I.K.W.,
Nakar E., Rabinak I., Sari R., Silverman J.M., Xu D., Bloom J.S., Law N.M.,
Nugent P.E., Quimby R.M.
<Astrophys. J., 747, L5 (2012)>
=2012ApJ...747L...5C 2012ApJ...747L...5C
ADC_Keywords: Photometry, RI ; Supernovae
Keywords: supernovae: general - supernovae: individual (PTF 10vgv)
Abstract:
We present the discovery of PTF 10vgv, a Type Ic supernova (SN)
detected by the Palomar Transient Factory, using the Palomar 48 inch
telescope (P48). R-band observations of the PTF 10vgv field with P48
probe the SN emission from its very early phases (about two weeks
before R-band maximum) and set limits on its flux in the week prior to
the discovery. Our sensitive upper limits and early detections
constrain the post-shock-breakout luminosity of this event. Via
comparison to numerical (analytical) models, we derive an upper-limit
of R≲4.5R☉ (R≲1R☉) on the radius of the progenitor star,
a direct indication in favor of a compact Wolf-Rayet star. Applying a
similar analysis to the historical observations of SN 1994I yields
R≲1/4R☉ for the progenitor radius of this SN.
Description:
On 2010 September 14.1446 (UTC times are used throughout), we
discovered a Type Ic SN, PTF 10vgv, via the automated Oarical software
(Bloom et al. 2012PASP..124.1175B 2012PASP..124.1175B) in an image (60s exposure) taken
with the Palomar Oschin Schmidt 48 inch telescope (P48). P48
observations were obtained with the Mould-R filter (Table 1 and Figure
2). A high-quality image produced by stacking several images of the
same field was used as a reference and subtracted from the individual
images. Photometry was performed with an aperture of 2" radius
relative to the r-band magnitudes of 10 SDSS reference stars in the
field (Figure 1), applying color corrections. Aperture corrections
were applied to account for systematic errors as well as errors
introduced by the subtraction process (Corsi et al. 2011ApJ...741...76C 2011ApJ...741...76C).
Objects:
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RA (2000) DE Designation(s)
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22 16 01.17 +40 52 03.3 PTF 10vgv = PTF 10vgv
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 25 103 P48 Observations of PTF 10vgv in R-band
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See also:
II/313 : Palomar Transient Factory (PTF) photometric catalog 1.0 (Ofek+, 2012)
J/ApJ/728/14 : Photometry of SN 2009bb (Pignata+, 2011)
J/A+A/508/371 : UBVRIJHK observations of SN 2007gr (Hunter+, 2009)
J/MNRAS/383/1485 : BVRI light curves of SN 2003jd (Valenti+, 2008)
J/ApJ/687/1201 : SN and LGRB locations in their host galaxies (Kelly+, 2008)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 F6.3 d Date [-6.776/91.973] Julian Date (JD-2455453.6446)
8- 10 I3 s Exp [60/600] Exposure time
12 A1 --- l_Rmag Limit flag on Rmag
14- 19 F6.3 mag Rmag [16.20/21.40] P48 R-band magnitude
21- 25 F5.3 mag e_Rmag [0.02/0.18]? Rmag uncertainty
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 07-Oct-2013