J/ApJ/723/47 IfA Deep SN rates (Rodney+, 2010)
Revised supernova rates from the IfA Deep Survey. Rodney S.A., Tonry J.L. <Astrophys. J., 723, 47-53 (2010)> =2010ApJ...723...47R
ADC_Keywords: Redshifts ; Supernovae Keywords: supernovae: general Abstract: The IfA Deep Survey uncovered ∼130 thermonuclear supernova (TN SN, i.e., Type Ia) candidates at redshifts from z=0.1 out to beyond z=1. The TN SN explosion rates derived from these data have been controversial, conflicting with evidence emerging from other surveys. This work revisits the IfA Deep Survey to re-evaluate the photometric evidence. Applying the SOFT (Supernova Ontology with Fuzzy Templates) program to the light curves of all SN candidates, we derive new classification grades and redshift estimates. We find a volumetric rate for z∼0.5 that is substantially smaller than the originally published values, bringing the revised IfA Deep rate into good agreement with other surveys. With our improved photometric analysis techniques, we are able to confidently extend the rate measurements to higher redshifts and we find a steadily increasing TN SN rate, with no indication of a peak out to z=1.05. Description: The IfA (Institute for Astronomy) Deep Survey was the first survey to take full advantage of the wide field imaging cameras of Mauna Kea to allow for both SN discovery and simultaneous follow-up observations. Using the 12k camera on the Canada-France-Hawaii Telescope (CFHT) and Suprime-Cam on Subaru, the survey covered five fields with a total survey area of 2.5deg2. Each field was revisited approximately every 10 days for observations in the R, I, and Z bands. The survey design and operations are described in greater detail by Barris et al. (2004, Cat. J/ApJ/602/571) and Liu et al. (2002ApJ...568L.107L). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 62 23 Redshift validation subset: 23 spectroscopically observed thermonuclear (TN) SNe (SN.Ia) table2.dat 74 131 SOFT (Supernova Ontology with Fuzzy Template) results for 131 thermonuclear (TN) SN candidates (SN.Ia)
See also: B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-) J/AJ/139/519 : Carnegie supernova project. SNe Ia (Contreras+, 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/ApJS/185/32 : First-year SDSS-II SN results (Kessler+, 2009) J/A+A/479/49 : Supernova rates from STRESS (Botticella+, 2008) J/MNRAS/389/1871 : Type Ia supernovae candidates from SDSS (Horesh+, 2008) J/ApJ/673/981 : Type Ia supernova rates with HST ACS (Kuznetsova+, 2008) J/ApJ/686/749 : Improved cosmological constraints from SNe (Kowalski+, 2008) J/MNRAS/382/1169 : Supernovae in the Subaru Deep Field (Poznanski+, 2007) J/A+A/437/789 : Restframe I-band light curves of SN Ia (Nobili+, 2005) J/ApJ/602/571 : High-redshift supernovae IRZ fluxes (Barris+, 2004) J/ApJ/594/1 : High-z supernovae VRI mag and distances (Tonry+, 2003) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name SN name (SNYYYYaa) 10- 11 I2 h RAh Hour of Right Ascension (J2000) 13- 14 I2 min RAm Minute of Right Ascension (J2000) 16- 20 F5.2 s RAs Second of Right Ascension (J2000) 22 A1 --- DE- Sign of the Declination (J2000) 23- 24 I2 deg DEd Degree of Declination (J2000) 26- 27 I2 arcmin DEm Arcminute of Declination (J2000) 29- 32 F4.1 arcsec DEs Arcsecond of Declination (J2000) 34- 38 F5.3 --- gamma [0.64/1] Classification grade (likelihood to be a TN SN) 40- 44 F5.3 --- z [0.34/1.031] Spectroscopic redshift (from Barris et al. 2004, Cat. J/ApJ/602/571) 46- 50 F5.3 --- zSOFT [0.391/1.169] Estimated redshift (1) 52- 56 F5.3 --- E_zSOFT Upper limit uncertainty in zSOFT 58- 62 F5.3 --- e_zSOFT Lower limit uncertainty in zSOFT
Note (1): The z estimate determined by SOFT without a spectroscopic redshift prior.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name SN name (SNYYYYaa or fNNNNa) 10- 11 I2 h RAh Hour of Right Ascension (J2000) 13- 14 I2 min RAm Minute of Right Ascension (J2000) 16- 20 F5.2 s RAs Second of Right Ascension (J2000) 22 A1 --- DE- Sign of the Declination (J2000) 23- 24 I2 deg DEd Degree of Declination (J2000) 26- 27 I2 arcmin DEm Arcminute of Declination (J2000) 29- 32 F4.1 arcsec DEs Arcsecond of Declination (J2000) 34- 37 F4.2 --- gamma [0/1] Classification grade (likelihood to be a thermonuclear (TN) SN [SN Ia]) 39- 42 F4.2 --- z [0.12/1.24] SOFT determined redshift (1) 44- 47 F4.2 --- E_z Upper limit uncertainty in z 49- 52 F4.2 --- e_z Lower limit uncertainty in z 54- 58 F5.3 --- zp ?=9.999 Independent SN or host galaxy redshift 60- 64 F5.3 --- e_zp ?=9.999 Uncertainty in zp 66- 74 A9 --- r_zp Reference for zp (2)
Note (1): Using best available prior redshift. Note (2): Reference as follows: IAUC = spectroscopic z measurement reported in IAU Circulars; DEEP2 = spectroscopic z from the DEEP2 Redshift Survey, Data Release 2 (http://deep.berkeley.edu/DR2); SDSS = Photo-z from the SDSS Data Release 6 photoz2 catalog (Oyaizu et al. 2008ApJ...674..768O).
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 13-Jul-2012
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