J/ApJ/713/1026 SN Ia rate at redshift ≲0.3 from SDSS-II (Dilday+, 2010)
Measurements of the rate of type Ia supernovae at redshift ≲0.3 from the
Sloan Digital Sky Survey II Supernova Survey.
Dilday B., Smith M., Bassett B., Becker A., Bender R., Castander F.,
Cinabro D., Filippenko A.V., Frieman J.A., Galbany L., Garnavich P.M.,
Goobar A., Hopp U., Ihara Y., Jha S.W., Kessler R., Lampeitl H.,
Marriner J., Miquel R., Molla M., Nichol R.C., Nordin J., Riess A.G.,
Sako M., Schneider D.P., Sollerman J., Wheeler J.C., Ostman L., Bizyaev D.,
Brewington H., Malanushenko E., Malanushenko V., Oravetz D., Pan K.,
Simmons A., Snedden S.
<Astrophys. J., 713, 1026-1036 (2010)>
=2010ApJ...713.1026D 2010ApJ...713.1026D
ADC_Keywords: Supernovae ; Surveys ; Redshifts
Keywords: supernovae: general
Abstract:
We present a measurement of the volumetric Type Ia supernova (SN Ia)
rate based on data from the Sloan Digital Sky Survey II (SDSS-II)
Supernova Survey. The adopted sample of supernovae (SNe) includes 516
SNe Ia at redshift z≲0.3, of which 270(52%) are spectroscopically
identified as SNe Ia. The remaining 246 SNe Ia were identified through
their light curves; 113 of these objects have spectroscopic redshifts
from spectra of their host galaxy, and 133 have photometric redshifts
estimated from the SN light curves. Based on consideration of 87
spectroscopically confirmed non-Ia SNe discovered by the SDSS-II SN
Survey, we estimate that 2.04+1.61-0.95% of the photometric SNe Ia
may be misidentified. The sample of SNe Ia used in this measurement
represents an order of magnitude increase in the statistics for SN Ia
rate measurements in the redshift range covered by the SDSS-II
Supernova Survey.
Description:
The SDSS-II Supernova Survey was carried out during the Fall
(September-November) of 2005-2007, using the 2.5m telescope at Apache
Point Observatory (Sacramento Peak, New Mexico). Observations were
obtained in the SDSS ugriz filters with a wide-field CCD camera. The
region of the sky covered by the SDSS-II Supernova Survey (designated
Stripe 82; see Stoughton et al. 2002AJ....123..485S 2002AJ....123..485S) was bounded by
-60°<RAJ2000<60° and -1.258°<DEJ2000<1.258°. On
average, any given part of this ∼300deg2 area was imaged once every
four days during the survey operations. The survey is described in
more detail by Frieman et al. (2008AJ....135..338F 2008AJ....135..338F).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 49 312 Confirmed SNe Ia in the rate sample
table3.dat 49 148 SNe with spectroscopic redshifts in the rate sample
table4.dat 49 314 SNe with photometric redshifts in the rate sample
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See also:
J/A+A/526/A28 : SDSS-II supernovae NTT and NOT spectroscopy (Oestman+, 2011)
J/ApJ/708/661 : SDSS-II SN Survey: SNe II-P standardization (D'Andrea+, 2010)
J/ApJS/185/32 : First-year SDSS-II SN results (Kessler+, 2009)
J/AJ/135/348 : SDSS-II SNe survey: search and follow-up (Sako+, 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)
http://www.sdss.org/ : SDSS home page
Byte-by-byte Description of file: table[234].dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- ID SN identification number (<SDSS-II SN NNNNN>
in Simbad)
7- 12 A6 --- IAU IAU name if any (YYYYaa) (only for table 2)
14- 22 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000)
24- 31 F8.5 deg DEdeg Declination in decimal degrees (J2000)
33- 37 F5.3 --- z Redshift
39- 43 F5.3 --- e_z ? Error in z (only for table 4)
45- 49 F5.3 --- Prob [0,1] Fit probability
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 16-Apr-2012