The fourth data release of the Sloan Digital Sky Survey.
ADELMAN-McCARTHY J.K., AGUEROS M.A., ALLAM S.S., ANDERSON K.S.J., ANDERSON S.F., ANNIS J., BAHCALL N.A., BALDRY I.K., BARENTINE J.C., BERLIND A., BERNARDI M., BLANTON M.R., BOROSKI W.N., BREWINGTON H.J., BRINCHMANN J., BRINKMANN J., BRUNNER R.J., BUDAVARI T., CAREY L.N., CARR M.A., CASTANDER F.J., CONNOLLY A.J., CSABAI I., CZARAPATA P.C., DALCANTON J.J., DOI M., DONG F., EISENSTEIN D.J., EVANS M.L., FAN X., FINKBEINER D.P., FRIEDMAN S.D., FRIEMAN J.A., FUKUGITA M., GILLESPIE B., GLAZEBROOK K., GRAY J., GREBEL E.K., GUNN J.E., GURBANI V.K., DE HAAS E., HALL P.B., HARRIS F.H., HARVANEK M., HAWLEY S.L., HAYES J., HENDRY J.S., HENNESSY G.S., HINDSLEY R.B., HIRATA C.M., HOGAN C.J., HOGG D.W., HOLMGREN D.J., HOLTZMAN J.A., ICHIKAWA S.-I., IVEZIC Z., JESTER S., JOHNSTON D.E., JORGENSEN A.M., JURIC M., KENT S.M., KLEINMAN S.J., KNAPP G.R., KNIAZEV A.Y., KRON R.G., KRZESINSKI J., KUROPATKIN N., LAMB D.Q., LAMPEITL H., LEE B.C., LEGER R.F., LIN H., LONG D.C., LOVEDAY J., LUPTON R.H., MARGON B., MARTINEZ-DELGADO D., MANDELBAUM R., MATSUBARA T., McGEHEE P.M., McKAY T.A., MEIKSIN A., MUNN J.A., NAKAJIMA R., NASH T., NEILSEN E.H.Jr, NEWBERG H.J., NEWMAN P.R., NICHOL R.C., NICINSKI T., NIETO-SANTISTEBAN M., NITTA A., O'MULLANE W., OKAMURA S., OWEN R., PADMANABHAN N., PAULS G., PEOPLES J.Jr, PIER J.R., POPE A.C., POURBAIX D., QUINN T.R., RICHARDS G.T., RICHMOND M.W., ROCKOSI C.M., SCHLEGEL D.J., SCHNEIDER D.P., SCHROEDER J., SCRANTON R., SELJAK U., SHELDON E., SHIMASAKU K., SMITH J.A., SMOLCIC V., SNEDDEN S.A., STOUGHTON C., STRAUSS M.A., SUBBARAO M., SZALAY A.S., SZAPUDI I., SZKODY P., TEGMARK M., THAKAR A.R., TUCKER D.L., UOMOTO A., VANDEN BERK D.E., VANDENBERG J., VOGELEY M.S., VOGES W., VOGT N.P., WALKOWICZ L.M., WEINBERG D.H., WEST A.A., WHITE S.D.M., XU Y., YANNY B., YOCUM D.R., YORK D.G., ZEHAVI I., ZIBETTI S. and ZUCKER D.B.
Abstract (from CDS):
This paper describes the Fourth Data Release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through 2004 June. The data release includes five-band photometric data for 180 million objects selected over 6670 deg2 and 673,280 spectra of galaxies, quasars, and stars selected from 4783 deg2 of those imaging data using the standard SDSS target selection algorithms. These numbers represent a roughly 27% increment over those of the Third Data Release; all the data from previous data releases are included in the present release. The Fourth Data Release also includes an additional 131,840 spectra of objects selected using a variety of alternative algorithms, to address scientific issues ranging from the kinematics of stars in the Milky Way thick disk to populations of faint galaxies and quasars.
(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases
Other object types:
G
(2006AJ,LEDA,...),
*
(AG,BD,...),
QSO
(2010A&A,[VV2006],...),
AGN
([VV2000c],[VV2003c],...),
gam
(2FGL,3FGL,...),
Rad
(2C,DA,...),
IR
(IRAS,IRC,...),
X
(2MAXI,XSS),
GiC
(GIN),
GiG
(K79),
AG?
(2020MNRAS)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
ra dec : right ascension and declination (unit and frame defined according to your Output Options)
Grey values are increasing the original precision due to the computation of frame transformations
(wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
[error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
position angle (in degrees North celestial pole to East)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
ra dec : right ascension and declination (unit and frame defined according to your Output Options)
Grey values are increasing the original precision due to the computation of frame transformations
(wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
[error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
position angle (in degrees North celestial pole to East)
quality : flag of quality
E ≥ 10"
D : 1-10" (and some old data)
C : 0.1-1"
B : 0.01-0.1" + 2MASS, Tyc
A : VLBI, Hipparcos
bibcode : bibcode of the coordinates reference
FK4
coord.
(ep=B1950 eq=1950) :
00 40 00.095 +40 59 41.73
[
]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
ra dec : right ascension and declination (unit and frame defined according to your Output Options)
Grey values are increasing the original precision due to the computation of frame transformations
(wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
[error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
position angle (in degrees North celestial pole to East)
quality : flag of quality
E ≥ 10"
D : 1-10" (and some old data)
C : 0.1-1"
B : 0.01-0.1" + 2MASS, Tyc
A : VLBI, Hipparcos
bibcode : bibcode of the coordinates reference
Gal
coord.
(ep=J2000) :
121.174329 -21.573309
[
]
Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode"
value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options
(redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity)
[error] : error of the corresponding value displayed before
(wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or '∼'(unknown)
quality : flag of quality ( A=best quality -> E=worst quality, ∼=unknown quality)
References (12643 between 1850 and 2024) (Total 12643)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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