J/other/Nat/491.228 Light curves of 2 superluminous supernovae (Cooke+, 2012)
Superluminous supernovae at redshifts of 2.05 and 3.90.
Cooke J., Sullivan M., Gal-Yam A., Barton E.J., Carlberg R.G.,
Ryan-Weber E.V., Horst C., Omori Y., Diaz G.
<Nature, 491, 228-231 (2012)>
=2012Natur.491..228C 2012Natur.491..228C
ADC_Keywords: Supernovae ; Photometry, SDSS
Abstract:
A rare class of 'superluminous' supernovae that are about ten or more
times more luminous at their peaks than other types of luminous
supernova has recently been found at low to intermediate redshifts. A
small subset of these events have luminosities that evolve slowly and
result in radiated energies of up to about 1051ergs. Therefore, they
are probably examples of 'pair-instability' or 'pulsational
pair-instability' supernovae with estimated progenitor masses of 100
to 250 times that of the Sun. These events are exceedingly rare at low
redshift, but are expected to be more common at high redshift because
the mass distribution of the earliest stars was probably skewed to
high values. Here we report the detection of two superluminous
supernovae, at redshifts of 2.05 and 3.90, that have slowly evolving
light curves. We estimate the rate of events at redshifts of 2 and 4
to be approximately ten times higher than the rate at low redshift.
The extreme luminosities of superluminous supernovae extend the
redshift limit for supernova detection using present technology,
previously 2.36, and provide a way of investigating the deaths of the
first generation of stars to form after the Big Bang.
Objects:
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RA (2000) DE Designation(s) (z) (files)
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22 13 39.970 -17 45 24.486 (2.0458) = SN 2213-1745 (tablef1.dat)
10 00 05.872 +02 16 23.621 (3.8993) = SN 1000+0216 (tablef2.dat)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablef1.dat 50 50 SN2213-1745 g'r'i' magnitudes for 2005 and 2006
tablef2.dat 50 53 SN1000+0216 g'r'i' magnitudes for 2006 and 2007
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See also:
J/A+A/506/999 : Photometric Calibration of SNLS (Regnault+, 2009)
Byte-by-byte Description of file: tablef1.dat tablef2.dat
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Bytes Format Units Label Explanations
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1- 5 I5 d MJDg' ? MJD for g' band
7- 11 F5.2 mag g'mag ? g' magnitude
13- 16 F4.2 mag e_g'mag ? rms uncertainty on g'mag
18- 22 I5 d MJDr' ? MJD for r' band
24- 28 F5.2 mag r'mag ? r' magnitude
30- 33 F4.2 mag e_r'mag ? rms uncertainty on r'mag
35- 39 I5 d MJDi' ? MJD for i' band
41- 45 F5.2 mag i'mag ? i' magnitude
47- 50 F4.2 mag e_i'mag ? rms uncertainty on i'mag
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 27-Dec-2012