J/ApJS/167/40 SDSS4 confirmed white dwarfs catalog (Eisenstein+, 2006)
A catalog of spectroscopically confirmed white dwarfs from the
Sloan Digital Sky Survey Data Release 4.
Eisenstein D.J., Liebert J., Harris H.C., Kleinman S.J., Nitta A.,
Silvestri N., Anderson S.A., Barentine J.C., Brewington H.J., Brinkmann J.,
Harvanek M., Krzesinski J., Neilsen E.H.Jr, Long D., Schneider D.P.,
Snedden S.A.
<Astrophys. J. Suppl. Ser., 167, 40-58 (2006)>
=2006ApJS..167...40E 2006ApJS..167...40E
ADC_Keywords: Surveys ; Stars, white dwarf ; Stars, subdwarf ;
Photometry, SDSS ; Proper motions
Keywords: catalogs - subdwarfs - white dwarfs
Abstract:
We present a catalog of 9316 spectroscopically confirmed white dwarfs
from the Sloan Digital Sky Survey Data Release 4. We have selected the
stars through photometric cuts and spectroscopic modeling, backed up
by a set of visual inspections. About 6000 of the stars are new
discoveries, roughly doubling the number of spectroscopically
confirmed white dwarfs. We analyze the stars by performing temperature
and surface gravity fits to grids of pure hydrogen and helium
atmospheres. Among the rare outliers are a set of presumed helium-core
DA white dwarfs with estimated masses below 0.3M☉, including two
candidates that may be the lowest-mass yet found. We also present a
list of 928 hot subdwarfs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 314 10090 SDSS DR4 white dwarfs
table1c.dat 314 988 SDSS DR4 hot Subdwarfs
table5.dat 65 73 List of stars from DR1 catalog missing
from this catalog
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See also:
III/235 : Spectroscopically Identified White Dwarfs (McCook+, 2008)
J/ApJ/607/426 : Catalog of white dwarfs in SDSS-DR1 (Kleinman+, 2004)
J/AJ/131/1674 : Close binary systems from SDSS DR4 (Silvestri+, 2006)
II/267 : The SDSS Photometric Catalog, Release 4 (Adelman-McCarthy+, 2006)
http://sdss.org/ : SDSS Home Page
Byte-by-byte Description of file: table1.dat table1c.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- SpClass Spectral Classification
14- 15 A2 --- --- [WD]
16- 25 A10 --- WD McCook & Sion (1999, see Cat. III/235)
WD catalog ID (as of 2005 August)
27- 31 A5 --- r_SpClass Provenance of the SDSS classification (1)
33 I1 --- PSpec [0/1] Primary spectrum (2)
35- 39 A5 --- --- [SDSS_]
40- 58 A19 --- SDSS The IAU name, JHHMMSS.ss+DDMMSS.s (3)
60- 69 F10.6 deg RAdeg Decimal degree right ascension (J2000) (4)
71- 80 F10.6 deg DEdeg Decimal degree declination (J2000) (4)
82- 87 F6.2 10mas/yr pm ? Proper motion
89- 93 F5.1 deg pmPA ? Proper-motion position angle,
where 0 = north, 90 = east, etc
95-101 F7.2 10mas/yr pmRA ? Proper motion in right ascension
103-109 F7.2 10mas/yr pmDE ? Proper motion in declination
111-118 F8.2 d MJD-P ? Modified Julian Date of imaging observation
120-123 I4 --- Run Run number
125-126 I2 --- reRun ? Rerun number
128 I1 --- CC Camera column
130-132 I3 --- Field Field number
134-137 I4 --- ID ? ID number within the field, not the objID
in the SDSS Catalog Archive Server
139-144 F6.3 mag umag ? SDSS u-band PSF as observed magnitude
146-151 F6.3 mag gmag ? SDSS g-band PSF as observed magnitude
153-158 F6.3 mag rmag ? SDSS r-band PSF as observed magnitude
160-165 F6.3 mag imag ? SDSS i-band PSF as observed magnitude
167-172 F6.3 mag zmag ? SDSS z-band PSF as observed magnitude
174-179 F6.3 mag e_umag ? Error in umag
181-185 F5.3 mag e_gmag ? Error in gmag
187-191 F5.3 mag e_rmag ? Error in rmag
193-199 F7.3 mag e_imag ? Error in imag
201-206 F6.3 mag e_zmag ? Error in zmag
208 A1 --- f_umag [0/1] Photometry flag on umag (1=bad)
210 A1 --- f_gmag [0/1] Photometry flag on gmag (1=bad)
212 A1 --- f_rmag [0/1] Photometry flag on rmag (1=bad)
214 A1 --- f_imag [0/1] Photometry flag on imag (1=bad)
216 A1 --- f_zmag [0/1] Photometry flag on zmag (1=bad)
218-222 F5.3 mag Ag Extinction in the g band (6)
224-227 I4 --- Plate SDSS Plate number
229-231 I3 --- Fiber SDSS Fiber number
233-237 I5 d MJD-S SDSS Modified Julian Date of spectroscopic
observation
239-243 F5.2 --- S/N Signal-to-noise ratio of spectrum in g band
245 I1 --- Deblend [0/1]? Object was not deblended (7)
247-257 I11 --- D-PTfl Decimal PrimTarget flag (8)
259-268 A10 --- H-PTfl Hexidecimal PrimTarget flag (8)
270-272 I3 --- D-STfl Decimal SecTarget flag (8)
274-278 A5 --- H-STfl Hexidecimal SecTarget flag (8)
280 I1 --- QFlag [0/1] Autofit quality flag (9)
282 I1 --- AElem [1/2] Autofit atmosphere element
(1 = Hydrogen, 2 = Helium)
284-289 I6 K Teff Autofit temperature
291-295 I5 K e_Teff Error in Teff
297-300 F4.2 [cm/s2] log(g) Autofit log surface gravity
302-306 F5.3 [cm/s2] e_log(g) Error in log(g)
308-314 F7.3 --- chi2 Autofit chi2 per degree of freedom
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Note (1): This is merely to track the provenance of our spectral
classification; it does not indicate discovery or literature
classifications, which could be tracked through the McCook & Sion
(1999ApJS..121....1M 1999ApJS..121....1M, Cat. III/210) catalog.
Kle04 = Kleinman et al. 2004, Cat. J/ApJ/607/426
Sil05 = Silvestri et al. 2006, Cat. J/AJ/131/1674
DR4 = This paper
Note (2): Flag as follows:
0 = Duplicate spectrum
1 = Otherwise
Note (3): This is the name from the SDSS DR4. Because of tiny astrometry
shifts, it is possible that this name may differ from the name in
previous SDSS releases. This breaks the IAU convention that published
names never change. We strongly recommend that associations be
performed on the astrometric coordinates rather than on the name.
Note (4): The epoch of the coordinates is given by the time of the SDSS
imaging observation.
Note (6): The canonical SDSS extinction curve in umag, gmag, rmag, imag,
and zmag is 1.36, 1.00, 0.73, 0.55, and 0.39 times Ag.
Note (7): Most of the relevant target selection catagories require that
the object be sufficiently isolated on the sky that it was not blended
with any other object. Blended stars have much lower completeness; see
section 5.6.
1 = Object isolated
0 = Object deblended
Note (8): These bit fields record the decisions from the various
spectroscopic targeting algorithms. See Stoughton et al.
(2002AJ....123..485S 2002AJ....123..485S) and Adelman-McCarthy et al. (Cat. II/267,
(2006ApJS..162...38A 2006ApJS..162...38A) or the online documentation for details. The
southern survey bit (0x80000000) has been suppressed in the secTarget
flag for brevity but retained in the primTarget flag (Adelman-McCarthy
et al., 2006, Cat. II/267).
Note (9): Autofit quality flag is 1=good; 0=do not use the autofit
numbers for anything but diagnostic searching
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [SDSS]
6- 24 A19 --- SDSS SDSS designation (JHHMMSS.ss+DDMMSS.s)
26- 28 I3 --- Plate SDSS Plate number
30- 34 I5 d MJD SDSS MJD number
36- 38 I3 --- Fiber SDSS fiber number
40- 48 F9.5 deg RAdeg Right ascension in decimal degrees (J2000)
50- 58 F9.5 deg DEdeg Declination in decimal degrees (J2000)
60- 65 A6 --- SpClass Spectral Classification
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 29-May-2008