J/ApJ/795/142 Defining photometric peculiar SNe Ia (Gonzalez-Gaitan+, 2014)
Defining photometric peculiar type Ia supernovae.
Gonzalez-Gaitan S., Hsiao E.Y., Pignata G., Forster F., Gutierrez C.P.,
Bufano F., Galbany L., Folatelli G., Phillips M.M., Hamuy M.,
Anderson J.P., De Jaeger T.
<Astrophys. J., 795, 142 (2014)>
=2014ApJ...795..142G 2014ApJ...795..142G (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae
Keywords: cosmology: miscellaneous - supernovae: general
Abstract:
We present a new photometric identification technique for SN 1991bg-like
type Ia supernovae (SNe Ia), i.e., objects with light curve
characteristics such as later primary maxima and the absence of a
secondary peak in redder filters. This method is capable of selecting
this sub-group from the normal type Ia population. Furthermore, we
find that recently identified peculiar sub-types such as SNe Iax and
super-Chandrasekhar SNe Ia have photometric characteristics similar to
91bg-like SNe Ia, namely, the absence of secondary maxima and
shoulders at longer wavelengths, and can also be classified with our
technique. The similarity of these different SN Ia sub-groups perhaps
suggests common physical conditions. This typing methodology permits
the photometric identification of peculiar SNe Ia in large upcoming
wide-field surveys either to study them further or to obtain a pure
sample of normal SNe Ia for cosmological studies.
Description:
In this work, we make use of several large, low-redshift (z<0.1) SN Ia
samples from the literature. Multi-band photometry is available for
more than 500 SNe Ia obtained through the effort of several teams,
including the Calan/Tololo survey (Hamuy et al. 1996, J/AJ/112/2408),
the Carnegie Supernova Project CSP (Contreras et al. 2010, J/AJ/139/519;
Stritzinger et al. 2011, J/AJ/142/156), the Center for Astrophysics
CfA (Hicken et al. 2009, J/ApJ/700/331; 2012, J/ApJS/200/12), the Lick
Observatory Supernova Search (Ganeshalingam et al. 2010, J/ApJS/190/418),
and many more.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 129 311 Nearby SNe Ia Used in This Study Requiring
Enough Light Curve Coverage
table3.dat 125 130 Nearby CC SNe Used in This Study Requiring
Enough Light Curve Coverage
refs.dat 68 188 References
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See also:
J/AJ/112/2408 : Light Curves of 29 SNe (Hamuy+ 1996)
J/ApJ/700/331 : Light curves of type Ia supernovae (CfA3) (Hicken+, 2009)
J/AJ/139/519 : Carnegie supernova project. SNe Ia (Contreras+, 2010)
J/ApJS/190/418 : Light curves for 165 SNe (Ganeshalingam+, 2010)
J/AJ/142/156 : The CSP (DR2): photometry of SNe Ia (Stritzinger+, 2011)
J/ApJS/200/12 : CfA4: light curves for 94 type Ia SNe (Hicken+, 2012)
J/A+A/568/A22 : Joint analysis of the SDSS-II and SNLS SNe Ia (Betoule+, 2014)
J/ApJS/219/13 : SNe Ia light curves for the LSQ-CSP sample (Walker+, 2015)
Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name SNe Ia name
16- 28 A13 --- Type SNe Ia type
30- 35 F6.2 --- Chi2Ia Reduced quality of fit to normal template
37- 42 F6.2 --- Chi291bg Reduced quality of fit to 91bg template
44-129 A86 --- Ref References (listed in refs.dat file)
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 32 A32 --- Ref Reference
34- 52 A19 --- Bibcode Reference bibcode
54- 68 A15 --- Com Comment on reference
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History:
From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 23-May-2017