J/ApJ/763/88 SDSS-II supernovae Ia cosmological analysis (Campbell+, 2013)
Cosmology with photometrically classified type Ia supernovae from the
SDSS-II Supernova Survey.
Campbell H., D'Andrea C.B., Nichol R.C., Sako M., Smith M., Lampeitl H.,
Olmstead M.D., Bassett B., Biswas R., Brown P., Cinabro D., Dawson K.S.,
Dilday B., Foley R.J., Frieman J.A., Garnavich P., Hlozek R., Jha S.W.,
Kuhlmann S., Kunz M., Marriner J., Miquel R., Richmond M., Riess A.,
Schneider D.P., Sollerman J., Taylor M., Zhao G.-B.
<Astrophys. J., 763, 88 (2013)>
=2013ApJ...763...88C 2013ApJ...763...88C
ADC_Keywords: Supernovae ; Redshifts ; Photometry ; Surveys
Keywords: cosmology: observations; distance scale; supernovae: general; surveys
Abstract:
We present the cosmological analysis of 752 photometrically classified
Type Ia Supernovae (SNe Ia) obtained from the full Sloan Digital Sky
Survey II (SDSS-II) Supernova (SN) Survey, supplemented with
host-galaxy spectroscopy from the SDSS-III Baryon Oscillation
Spectroscopic Survey. Our photometric-classification method is based
on the SN classification technique of Sako et al. (2011,
Cat. J/ApJ/738/162), aided by host-galaxy redshifts (0.05<z<0.55).
SuperNova ANAlysis simulations of our methodology estimate that we
have an SN Ia classification efficiency of 70.8%, with only 3.9%
contamination from core-collapse (non-Ia) SNe. We demonstrate that
this level of contamination has no effect on our cosmological
constraints. We quantify and correct for our selection effects (e.g.,
Malmquist bias) using simulations. When fitting to a flat ΛCDM
cosmological model, we find that our photometric sample alone gives
Ωm=0.24+0.07-0.05 (statistical errors only). If we relax
the constraint on flatness, then our sample provides competitive joint
statistical constraints on Ωm and ΩΛ,
comparable to those derived from the spectroscopically confirmed
Three-year Supernova Legacy Survey (SNLS3). Using only our data, the
statistics-only result favors an accelerating universe at 99.96%
confidence. Assuming a constant wCDM cosmological model, and combining
with H0, cosmic microwave background, and luminous red galaxy data,
we obtain w=-0.96+0.10-0.10, Ωm=0.29+0.02-0.02, and
Ωk=0.00+0.03-0.02 (statistical errors only), which is
competitive with similar spectroscopically confirmed SNe Ia analyses.
Overall this comparison is reassuring, considering the lower redshift
leverage of the SDSS-II SN sample (z<0.55) and the lack of
spectroscopic confirmation used herein. These results demonstrate the
potential of photometrically classified SN Ia samples in improving
cosmological constraints.
Description:
The SDSS-II SN Survey is a dedicated search for intermediate-redshift
SNe from repeated scans of the equatorial "Stripe 82" region (covering
300deg2) of the original SDSS. For three months a year
(September-November) over a three-year period (2005-2007), the SDSS
telescope performed multi-color ugriz imaging of this area of sky,
with a cadence of a few times per week (see section 2.1 for further
details).
We undertook a Baryon Oscillation Spectroscopic Survey (BOSS)
ancillary spectroscopic program (see Dawson et al. 2013AJ....145...10D 2013AJ....145...10D
for details of these programs), to obtain host-galaxy information for
most SDSS-II SN candidates (see section 2.2 and 2.3).
We have chosen to use only the SALT2 light-curve fitting algorithm
(Guy et al. 2010, Cat. J/A+A/523/A7) in this work.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table6.dat 189 752 Photometrically classified SNe Ia data
--------------------------------------------------------------------------------
See also:
B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
J/A+A/568/A22 : Joint analysis of SDSS-II and SNLS SNe Ia (Betoule+, 2014)
J/AJ/144/17 : SDSS & CSP ugri phot. of 9 type Ia supernova (Mosher+, 2012)
J/AJ/143/126 : Nearby Type Ia supernovae spectroscopy (Blondin+, 2012)
J/ApJ/755/125 : Sample of SNe Ia with z<0.25 from SDSS (Galbany+, 2012)
J/ApJ/746/85 : THe HST Cluster Supernova Survey. V. (Suzuki+, 2012)
J/ApJS/200/12 : CfA4: light curves for 94 type Ia SNe (Hicken+, 2012)
J/other/Nat/474.484 : Ligth curves of 4 supernovae (Quimby+, 2011)
J/MNRAS/410/1262 : Supernova Legacy Survey. Type Ia SNe (Walker+, 2011)
J/ApJ/740/92 : SN.Ia host galaxies properties (Gupta+, 2011)
J/ApJ/738/162 : SN Ia candidates from the SDSS-II SN Survey (Sako+, 2011)
J/ApJ/730/119 : HST/WFC3 obs. of Cepheids in SN Ia hosts (Riess+, 2011)
J/A+A/529/L4 : Reddening law of type Ia supernovae (Chotard+, 2011)
J/A+A/526/A28 : SDSS-II supernovae NTT and NOT spectroscopy (Oestman+, 2011)
J/ApJS/192/1 : Light-curve parameters from the SNLS (Conley+, 2011)
J/AJ/142/156 : The CSP (DR2): photometry of SNe Ia (Stritzinger+, 2011)
J/MNRAS/406/782 : Type Ia supernovae luminosities (Sullivan+, 2010)
J/ApJS/190/418 : Light curves for 165 SNe (Ganeshalingam+, 2010)
J/A+A/523/A7 : Light curves of type Ia supernovae in SNLS (Guy+, 2010)
J/AJ/139/120 : Low-redshift Type-Ia supernovae (Folatelli+, 2010)
J/ApJ/730/119 : HST/WFC3 obs. of Cepheids in SN Ia hosts (Riess+, 2011)
J/ApJ/722/566 : SNe Ia host galaxies in SDSS-II SN survey (Lampeitl+, 2010)
J/ApJ/716/712 : HST light curves of six SNe and Union2 (Amanullah+, 2010)
J/ApJ/713/1026 : SN Ia rate at redshift ≲0.3 from SDSS-II (Dilday+, 2010)
J/ApJ/700/1097 : Light curve parameters of SN Ia (Hicken+, 2009)
J/ApJ/700/331 : Light curves of type Ia supernovae (CfA3) (Hicken+, 2009)
J/ApJ/699/539 : Cepheids in SN-Ia host galaxies (Riess+, 2009)
J/ApJ/696/870 : Catalina Real-time Transient Survey (CRTS) (Drake+, 2009)
J/AJ/137/3731 : ESSENCE high-redshift supernova (Foley+, 2009)
J/A+A/500/L17 : Spectral flux ratio of SN Ia (Bailey+, 2009)
J/ApJS/185/32 : First-year SDSS-II SN results (Kessler+, 2009)
J/A+A/477/717 : Spectroscopy of Type Ia supernovae (Bronder+, 2008)
J/AJ/136/2306 : SDSS-II Supernova survey, 2005 (Holtzman+, 2008)
J/AJ/135/1766 : Sloan Digital Sky Survey-II supernova survey (Zheng+, 2008)
J/AJ/135/348 : SDSS-II SNe survey: search and follow-up (Sako+, 2008)
J/ApJ/686/749 : Improved cosmological constraints from SNe (Kowalski+, 2008)
J/ApJ/666/674 : ESSENCE supernova survey (Miknaitis+, 2007)
J/ApJ/659/122 : Improved distances to type Ia supernovae (Jha+, 2007)
J/AJ/133/403 : Light curve of 11 type Ia supernovae (Garg+, 2007)
J/AJ/131/527 : UBVRI light curves of 44 type Ia supernovae (Jha+, 2006)
J/ApJ/607/665 : Type Ia supernovae at z>1 discovered by HST (Riess+, 2004)
J/ApJ/594/1 : High-z supernovae VRI mag and distances (Tonry+, 2003)
J/AJ/112/2408 : Light Curves of 29 SNe (Hamuy+ 1996)
http://www.icg.port.ac.uk/~campbelh/ : SNe Ia research Campbell home page
http://classic.sdss.org/supernova : SDSS supernova survey home page
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- CID [703/22075] Unique identification number for
the whole SDSS-II SN Survey;
(<SDSS-II SN NNNNN> in Simbad)
7- 14 F8.6 --- z [0.03/0.71] BOSS host-galaxy redshift
16- 23 F8.6 --- e_z [0/0.01] z uncertainty
25- 33 F9.5 deg RAdeg [-47.4/58] SN event right ascension (J2000)
35- 42 F8.5 deg DEdeg [-1.3/1.3] SN event declination (J2000)
44- 52 F9.5 deg RAGdeg [-47.4/58] Host galaxy right ascension (J2000)
54- 61 F8.5 deg DEGdeg [-1.3/1.3] Host galaxy declination (J2000)
63- 81 I19 --- ObjID SDSS-DR8 object identifier for the host galaxy
83- 90 E8.3 --- X0 [8e-6/3e-3] SALT2 parameter X0 in flux units
92- 99 E8.3 --- e_X0 X0 uncertainty
101-105 F5.2 mag X1 [-3/3] SALT2 shape parameter X1
107-110 F4.2 mag e_X1 X1 uncertainty
112-116 F5.2 mag c [-0.25/0.25] SALT2 color parameter
118-121 F4.2 mag e_c Color uncertainty
123-131 E9.3 --- C01 Covariance of (X0,X1)
133-140 E8.3 --- C00 Variance of X0
142-148 F7.4 --- C11 Variance of X1
150-155 F6.4 --- C22 Variance of c
157-165 E9.3 --- C02 Covariance of (X0, c)
167-172 F6.3 --- C12 Covariance of (X1, c)
174-178 F5.2 mag mu [36/42.8] Uncorrected distance modulus
180-184 F5.2 mag muc Corrected distance modulus
186-189 F4.2 mag e_mu [0.06/0.6] Distance modulus error
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 20-Oct-2014