J/AJ/136/2306 SDSS-II Supernova survey, 2005 (Holtzman+, 2008)
The Sloan Digital Sky Survey. II: photometry and supernova Ia light curves from the 2005 data. Holtzman J.A., Marriner J., Kessler R., Sako M., Dilday B., Frieman J.A., Schneider D.P., Bassett B., Becker A., Cinabro D., DeJongh F., Depoy D.L., Doi M., Garnavich P.M., Hogan C.J., Jha S., Konishi K., Lampeitl H., Marshall J.L., McGinnis D., Miknaitis G., Nichol R.C., Prieto J.L., Riess A.G., Richmond M.W., Romani R., Smith M., Takanashi N., Tokita K., Van Der Heyden K., Yasuda N., Zheng C. <Astron. J., 136, 2306-2320 (2008)> =2008AJ....136.2306H
ADC_Keywords: Surveys ; Supernovae ; Photometry, SDSS Keywords: supernovae: general - techniques: photometric Abstract: We present ugriz light curves for 146 spectroscopically-confirmed or spectroscopically-probable Type Ia supernovae (SNe) from the 2005 season of the Sloan Digital Sky Survey-II Supernova (SN) survey. The light curves have been constructed using a photometric technique that we call scene modeling, which is described in detail here; the major feature is that SN brightnesses are extracted from a stack of images without spatial resampling or convolution of the image data. This procedure produces accurate photometry along with accurate estimates of the statistical uncertainty, and can be used to derive photometry taken with multiple telescopes. We discuss various tests of this technique that demonstrate its capabilities. We also describe the methodology used for the calibration of the photometry, and present calibrated magnitudes and fluxes for all of the spectroscopic SNe Ia from the 2005 season. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file sources.dat 77 146 SN list data/* 116 146 Individual photometry
See also: J/AJ/135/348 : SDSS-II SNe survey: search and follow-up (Sako+, 2008) J/AJ/135/1766 : Sloan Digital Sky Survey-II supernova survey (Zheng+, 2008) Byte-by-byte Description of file: sources.dat
Bytes Format Units Label Explanations
1- 10 A10 --- --- [SDSS-II SN] 12- 16 I5 --- SNID [722/12136] Supernova number 18- 19 I2 h RAh Simbad Hour of Right Ascension (J2000.0) 21- 22 I2 min RAm Simbad Minute of Right Ascension (J2000.0) 24- 27 F4.1 s RAs Simbad Second of Right Ascension (J2000.0) 29 A1 --- DE- Simbad Sign of the Declination (J2000.0) 30- 31 I2 deg DEd Simbad Degree of Declination (J2000.0) 33- 34 I2 arcmin DEm Simbad Arcminute of Declination (J2000.0) 36- 37 I2 arcsec DEs Simbad Arcsecond of Declination (J2000.0) 39- 43 F5.2 mag Bmag ? Simbad B band magnitude 45- 52 A8 --- SpType Simbad MK spectral type 55- 77 A23 --- FileName Name of the file with photometry in subdirectory "data"
Byte-by-byte Description of file: data/*
Bytes Format Units Label Explanations
1- 4 I4 --- Flag Gives values of the photometry flags for each measurement (1) 6- 17 F12.6 d MJD Modified Julian date of the measurement 20 I1 --- Filt [0/4] Filter in which the measurement was obtained:  corresponds to [ugriz] 23- 28 F6.3 mag mag asinh magnitude of the supernova for this epoch and filter in the native SDSS photometric system 31- 36 F6.3 mag e_mag Error on the magnitude 38- 44 F7.3 mag e_sky Estimate of possible systematic error from uncertainty in sky determination 48- 52 F5.3 mag e_gal Estimate of possible systematic error from uncertainty in galaxy background determination 54- 63 E10.4 uJy Flux Derived flux, using the SDSS/AB correction from the paper 66- 74 E9.4 uJy e_Flux Error in the flux 77- 85 E9.4 --- e_SkyF Estimate of possible systematic error from uncertainty in sky determination in flux units 88- 96 E9.4 --- e_galF Estimate of possible systematic error from uncertainty in galaxy background determination in flux units 98-101 A4 --- Tel [sdss] Telescope used for the measurement 105-108 I4 --- Run SDSS run number in which the observation was obtained 111 I1 --- Strip [0/1] SDSS strip 82N (0) or 82S (1) 115-116 I2 --- NFrame Number of available SDSS frames before 2005, which constrain the total brightness of the underlying galaxy
Note (1): Photometry flag: * FLAG=0 means there are no liens on the measurement. * FLAG>1024 means the measurement is likely bad. * For 0<FLAG<1024, the measurement is likely OK, but there was some lien on the frames so it was not used to constrain the galaxy background. See paper for more details.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 24-May-2011
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