J/AJ/144/17 SDSS and CSP ugri photometry of 9 type Ia supernova (Mosher+, 2012) ================================================================================ A precision photometric comparison between SDSS-II and CSP type Ia supernova data. Mosher J., Sako M., Corlies L., Folatelli G., Frieman J., Holtzman J., Jha S.W., Kessler R., Marriner J., Phillips M.M., Stritzinger M., Morrell N., Schneider D.P. =2012AJ....144...17M ================================================================================ ADC_Keywords: Supernovae ; Photometry, ugriz ; Redshifts ; Extinction ; Keywords: supernovae: general - techniques: photometric Abstract: Consistency between Carnegie Supernova Project (CSP) and SDSS-II Supernova Survey ugri measurements has been evaluated by comparing Sloan Digital Sky Survey (SDSS) and CSP photometry for nine spectroscopically confirmed Type Ia supernova observed contemporaneously by both programs. The CSP data were transformed into the SDSS photometric system. Sources of systematic uncertainty have been identified, quantified, and shown to be at or below the 0.023mag level in all bands. When all photometry for a given band is combined, we find average magnitude differences of equal to or less than 0.011mag in ugri, with rms scatter ranging from 0.043 to 0.077mag. The u-band agreement is promising, with the caveat that only four of the nine supernovae are well observed in u and these four exhibit an 0.038mag supernova-to-supernova scatter in this filter. Description: Between 2005 and 2007 the Carnegie Supernova Project (CSP) low-redshift program (Hamuy et al. 2006PASP..118....2H) and SDSS-II Supernova Survey observed 16 common objects, of which 10 are spectroscopically confirmed Ia SNe. One of these 10 (SN 2006fw) has image registration discrepancies, and has been excluded from our analysis. The SDSS-II Supernova Survey was one of three main scientific programs carried out by the SDSS-II. SDSS-II ugriz imaging was obtained with the SDSS camera attached to the SDSS 2.5m telescope located at the Apache Point Observatory (APO). The CSP optical (ugriBV) follow-up campaigns were carried out with the Direct CCD Camera attached to the Henrietta Swope 1m telescope located at the Las Campanas Observatory. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 49 9 Spectroscopically confirmed overlap SNe Ia table6.dat 44 29 Magnitude data-u band table7.dat 44 62 Magnitude data-g band table8.dat 44 61 Magnitude data-r band table9.dat 44 59 Magnitude data-i band -------------------------------------------------------------------------------- See also: B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-) J/A+A/526/A28 : SDSS-II supernovae NTT and NOT spectroscopy (Oestman+, 2011) J/ApJ/738/162 : SN Ia candidates from the SDSS-II SN Survey (Sako+, 2011) J/AJ/142/156 : The CSP (DR2): photometry of SNe Ia (Stritzinger+, 2011) J/ApJ/713/1026 : SN Ia rate at redshift <~ 0.3 from SDSS-II (Dilday+, 2010) 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/AJ/139/120 : Low-redshift Type-Ia supernovae (Folatelli+, 2010) J/AJ/139/519 : Carnegie supernova project. SNe Ia (Contreras+, 2010) J/ApJ/700/331 : Light curves of type Ia supernovae (CfA3) (Hicken+, 2009) J/ApJS/185/32 : First-year SDSS-II SN results (Kessler+, 2009) J/MNRAS/389/1871 : Type Ia supernovae candidates from SDSS (Horesh+, 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/AJ/136/2306 : SDSS-II Supernova survey, 2005 (Holtzman+, 2008) Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- SDSS-II [4524/18890] SDSS-II Supernova Project ID 7- 12 A6 --- SN Supernova IAU name (YYYYaa) 14- 19 F6.4 --- z Redshift in heliocentric frame 21- 27 F7.1 d MJD [53663/54393] B_max_ Modified Julian Date 29- 32 F4.2 mag Dm15 ? {Delta}m_15_ (interpolated S-corrected CSP magnitude-SDSS magnitude decline plotted as a function of rest-frame epoch) 34- 38 F5.3 mag AV Extinction A_v_ (from Schlegel et al., 1998ApJ...500..525S, dust maps) 40- 43 A4 --- Ref Reference for the CSP photometry (1) 45- 47 A3 --- Peculiar SNe spectroscopic peculiarity (Yes) 49 A1 --- f_Peculiar Similarity (2) -------------------------------------------------------------------------------- Note (1): Reference as follows: P+07 = Phillips et al. (2007PASP..119..360P). C+10 = Contreras et al. (2010, Cat. J/AJ/139/519). S+11 = Stritzinger et al. (2011, Cat. J/AJ/142/156). Note (2): Flag as follows: c = SN 2002ic like; d = SN 2005hj like; e = SN 2002cx like; f = SN 1986G like; g = SN 1991bg like. -------------------------------------------------------------------------------- Byte-by-byte Description of file: table[6789].dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 6 A6 --- SN Supernova IAU name (YYYYaa) 8- 14 F7.1 --- MJD Modified Julian Date 16- 22 F7.4 mag CSP(SDSS) The Carnegie Supernova Project (CSP) photometry transformed into the SDSS photometric system 24- 28 F5.3 mag e_CSP(SDSS) Error in CSP(SDSS) 30- 36 F7.4 mag SDSS(Native) SDSS magnitude in the native photometric system 38- 42 F5.3 mag e_SDSS(Native) Error in SDSS(Native) 44 I1 --- Spectrum O=no or 1=yes 46 A1 --- Band [ugri] Band (filter) -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Sylvain Guehenneux [CDS] 16-Sep-2013