J/AJ/135/348 SDSS-II SNe survey: search and follow-up (Sako+, 2008)
The Sloan Digital Sky Survey-II supernova survey: search algorithm and
follow-up observations.
Sako M., Bassett B., Becker A., Cinabro D., Dejongh F., Depoy D.L.,
Dilday B., Doi M., Frieman J.A., Garnavich P.M., Hogan C.J., Holtzman J.,
Jha S., Kessler R., Konishi K., Lampeitl H., Marriner J., Miknaitis G.,
Nichol R.C., Prieto J.L., Riess A.G., Richmond M.W., Romani R.,
Schneider D.P., Smith M., Subbarao M., Takanashi N., Tokita K.,
van der Heyden K., Yasuda N., Zheng C., Barentine J., Brewington H.,
Choi C., Dembicky J., Harnavek M., Ihara Y., Im M., Ketzeback W.,
Kleinman S.J., Krzesinski J., Long D.C., Malanushenko E., Malanushenko V.,
McMillan R.J., Morokuma T., Nitta A., Pan K., Saurage G., Snedden S.A.
<Astron. J., 135, 348-373 (2008)>
=2008AJ....135..348S 2008AJ....135..348S
ADC_Keywords: Supernovae ; Redshifts ; Spectroscopy ; Surveys
Keywords: cosmology: observations - methods: data analysis -
techniques: image processing - supernovae: general - surveys
Abstract:
The Sloan Digital Sky Survey-II Supernova Survey has identified a
large number of new transient sources in a 300deg2 region along the
celestial equator during its first two seasons of a three-season
campaign. Multi-band (ugriz) light curves were measured for most of
the sources, which include solar system objects, galactic variable
stars, active galactic nuclei, supernovae (SNe), and other
astronomical transients. The imaging survey is augmented by an
extensive spectroscopic follow-up program to identify SNe, measure
their redshifts, and study the physical conditions of the explosions
and their environment through spectroscopic diagnostics. During the
survey, light curves are rapidly evaluated to provide an initial
photometric type of the SNe, and a selected sample of sources are
targeted for spectroscopic observations. In the first two seasons, 476
sources were selected for spectroscopic observations, of which 403
were identified as SNe. For the type Ia SNe, the main driver for the
survey, our photometric typing and targeting efficiency is 90%. Only
6% of the photometric SN Ia candidates were spectroscopically
classified as non-SN Ia instead, and the remaining 4% resulted in low
signal-to-noise, unclassified spectra.
Description:
The SDSS-II Supernova Survey has been allocated the bulk of the time
during the fall seasons (September 1-November 30) of 2005-7 on the
SDSS telescope at Apache Point Observatory (APO). An overview of the
SN Survey is given in Frieman et al. (2008AJ....135..338F 2008AJ....135..338F). The
telescopes used for spectroscopy in 2005 and 2006 included the 9.2m
HET, 3.6m NTT, 3.5m ARC, 8.2m Subaru, 2.4m MDM Hiltner, 4.2m WHT,
4m KPNO Mayall, 10m Keck, 2.5m NOT, and the 11m SALT.
Throughout the 2005 search, we used some of our ARC 3.5m and MDM 2.4m
time, as well as the imager on the NMSU 1m telescope, University of
Hawaii 88 inch telescope, the 1.8m Vatican Advanced Technology
Telescope (VATT), and the 3.5m WIYN telescope.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table5.dat 61 163 Spectroscopically confirmed supernovae in 2005
table6.dat 61 237 Spectroscopically confirmed supernovae in 2006
--------------------------------------------------------------------------------
See also:
B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)
II/256 : Sternberg Supernova Catalogue, 2004 version (Tsvetkov+, 2004)
J/AJ/131/527 : UBVRI light curves of 44 type Ia supernovae (Jha+, 2006)
J/ApJ/659/122 : Improved distances to type Ia supernovae (Jha+, 2007)
J/ApJ/666/674 : ESSENCE supernova survey (Miknaitis+, 2007)
J/AJ/135/1766 : Sloan Digital Sky Survey-II supernova survey (Zheng+, 2008)
http://www.cfa.harvard.edu/supernova : The CfA SN Group home page
Byte-by-byte Description of file: table[56].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- SNID Internal SN candidate designation
(<SDSS-II SN NNNNN> in Simbad)
7- 12 A6 --- SN IAUC name (YYYYaa)
14 A1 --- r_SN [fgh] Reference of SN confirmation (1)
16- 21 F6.4 --- zsp ? Final spectroscopic redshift (table 5) or
Preliminary redshift (table 6) (2)
23- 31 F9.5 deg RAdeg [-180/+180] Right Ascension in decimal
degrees (J2000)
33- 40 F8.5 deg DEdeg Declination in decimal degrees (J2000)
42- 51 A10 "YYYY/MM/DD" Date Date of discovery
53- 58 A6 --- Type Final spectroscopic type (table 5) or
Preliminary spectroscopic type (table 6) (3)
60- 61 I2 --- Nobs ? Number of spectra (4)
--------------------------------------------------------------------------------
Note (1): Flag as follows:
f = Spectroscopically confirmed by Quimby et al. (2007ApJ...666.1083Q 2007ApJ...666.1083Q)
g = Spectroscopically confirmed by the ESSENCE Group (see Miknaitis et al.,
2007, Cat. J/ApJ/666/674).
h = Spectroscopically confirmed by CfA SN Group (Riess et al.
1995ApJ...438L..17R 1995ApJ...438L..17R; Riess 1996PhDT.........3R 1996PhDT.........3R; Riess et al.
1999AJ....117..707R 1999AJ....117..707R; Jha et al. 2006, Cat. J/AJ/131/527; 2007,
Cat. J/ApJ/659/122; http://www.cfa.harvard.edu/supernova).
Note (2): In table 5, when narrow galaxy lines are detected in at least one
of the spectra, the redshifts are given to four decimal places. The
typical uncertainties are ∼0.0005. When only the SN is detected, the
redshifts are given to three decimal places and the uncertainties are
∼0.005 (see Zheng et al. (2008, Cat. J/AJ/135/1766)). In table 6, the
preliminary spectroscopic redshift typical uncertainties are ∼0.01.
Note (3): Spectroscopically probable SNe Ia are designated "SN Ia?" (see
Zheng et al. (2008, Cat. J/AJ/135/1766)).
Note (4): This includes all spectral observations performed including those
of the SN candidate and possibly its host galaxy.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Zheng et al. First-year spectroscopy for the Sloan Digital Sky Survey-II
supernova survey. 2008AJ....135.1766Z 2008AJ....135.1766Z Cat. J/AJ/135/1766
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 21-Feb-2011