J/AJ/134/579 Morphologically classified galaxies from SDSS DR3 (Fukugita+, 2007)
A catalog of morphologically classified galaxies from the Sloan Digital Sky
Survey: north equatorial region.
Fukugita M., Nakamura O., Okamura S., Yasuda N., Barentine J.C.,
Brinkmann J., Gunn J.E., Harvanek M., Ichikawa T., Lupton R.H.,
Schneider D.P., Strauss M.A., York D.G.
<Astron. J., 134, 579-593 (2007)>
=2007AJ....134..579F 2007AJ....134..579F
ADC_Keywords: Galaxy catalogs ; Morphology
Keywords: catalogs - galaxies: fundamental parameters
Abstract:
We present a catalog of morphologically classified bright galaxies in
the north equatorial stripe (230deg2) derived from the Third Data
Release of the Sloan Digital Sky Survey (SDSS). Morphological
classification is performed by visual inspection of images in the g
band. The catalog contains 2253 galaxies complete to a magnitude limit
of r=16 after Galactic extinction correction, selected from 2658
objects that are judged to be extended in the photometric catalog in
the same magnitude limit. A total of 1866 galaxies in our catalog have
spectroscopic information. A brief statistical analysis is presented
for the frequency of morphological types and mean colors in the
catalog. A visual inspection of the images reveals that the rate of
interacting galaxies in the local universe is approximately 1.5% in
the r≤16 sample. A verification is made for the photometric catalog
generated by the SDSS, especially as to its bright-end completeness.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 134 2275 Catalog of morphologically classified galaxies
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See also:
II/259 : The SDSS Photometric Catalog, Release 3 (Abazajian+ 2005)
II/294 : SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
J/AJ/123/567 : SDSS quasar catalog, I: Early Data Release (Schneider+, 2002)
J/AJ/125/1817 : SDSS Early-Type Galaxies Catalog (Bernardi+, 2003)
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- [FNO2007] Running identification number
6- 24 A19 --- DR3 The DR3 photometric identification,
NNNN-N-NN-NNNN-NNNN (1)
26- 34 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000)
36- 44 F9.5 deg DEdeg Declination in decimal degrees (J2000)
46- 62 A17 --- EDR The EDR photometric identification
NNNN-N-NN-NNNN-NNNN (1)
64 I1 --- DR [1/3] Flag for catalog inclusion (2)
66- 67 A2 --- sp [012 :] Flag for spectroscopic target
selection (3)
69- 72 F4.1 --- TT Morphology index (4)
74- 76 F3.1 --- e_TT The 1σ uncertainty in TT
78- 79 A2 --- Qual Photometric quality (5)
81- 85 F5.2 mag rmag Petrosian r magnitude (6)
87- 99 A13 --- SpecID Spectroscopic Plate-MJD-Fiber identification
101-106 F6.4 --- z ? Heliocentric redshift
108-112 F5.3 --- Con(z) ? Confidence level of redshift measurement
114-128 A15 --- Com Additional comments (8)
130-134 I5 --- PGC ? The PGC catalog number (Cat. VII/237)
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Note (1): The numbers mean
run (observation) - camcol (camera column) - rerun (photometric
data reduction)- field - object id (see DR3, Cat. II/259 for details).
Note (2): Flag for catalog inclusion as follows:
3 = both in DR3 (rmag≤16) and in EDR (rmag≤15.9)
2 = only in DR3 (rmag≤16)
1 = rmag>16
Note (3): Flag for spectroscopic target selection as follows:
0 = not targeted
1 = targeted but not observed
2 = observed
2: = fiber positioned off-nucleus, but on some other part of the
object carrying the specified photometric identification
Note (4): The mean of three classifiers rounded to the nearest integer or
half-integer.
Note (5): Photometric quality flag as follows:
0 = good photometry (typical error expected to be smaller than
approximately 0.1mag based on visual estimates)
1 = photometry is accurate if one uses the magnitude given to the
parent image
2 = some errors, say 0.3mag (with visual estimates), is suspected in
photometry
3 = poor photometry. (Note that these flags are somewhat subjective.)
2c = suspected errors. Magnitudes may easily be obtained by
applying aperture photometry centred on the designated object
using parent atlas image frames
2p = suspected errors. Magnitudes may easily be obtained by
applying aperture photometry centred on the designated object
using child atlas image frames
3c = poor photometry. Magnitudes may easily be obtained by applying
aperture photometry centred on the designated object using
parent atlas image frames
3p = poor photometry. Magnitudes may easily be obtained by
applying aperture photometry centred on the designated object
using child atlas image frames
Note (6): Of the child image after correcting for Galactic extinction.
Note (8): Abbreviations used:
p = peculiar, and this flag is given only when galaxies
are classified into normal types,
am = galaxies with an amorphous appearance,
int = interacting,
d-nucl = double nuclei within a single galaxy,
"double" and "multiple" stand for more than one galaxy in the child
field, while interactions among them are not apparent.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 07-Sep-2009