VII/237 HYPERLEDA. I. Catalog of galaxies (Paturel+, 2003)
HYPERLEDA. I. Identification and designation of galaxies.
Paturel G., Petit C., Prugniel P., Theureau G., Rousseau J., Brouty M.,
Dubois P., Cambresy L.
<Astron. Astrophys. 412, 45 (2003)>
=2003A&A...412...45P 2003A&A...412...45P
ADC_Keywords: Galaxy catalogs
Keywords: galaxies: general - catalogs
Abstract:
We present the new catalog of principal galaxies (PGC2003). It
constitutes the framework of the HYPERLEDA database that supersedes
the LEDA one, with more data and more capabilities. The catalog is
still restricted to confirmed galaxies, i.e. about one million
galaxies, brighter than ∼18B-mag.
In order to provide the best possible identification for each galaxy
we give: accurate coordinates (typical accuracy better than 2 arcsec),
diameter, axis ratio and position angle. Diameters and axis ratios
have been homogenized to the RC2 system at the limiting surface
brightness of 25B-mag/arcsec2, using a new method, the EPIDEMIC
method.
In order to provide the best designation for each galaxy, we collected
the names from 50 catalogues. The compatibility of the spelling is
tested against NED and SIMBAD, and, as far as possible we used a
spelling compatible with both. For some cases, where no consensus
exists between NED, SIMBAD and LEDA, we propose some changes that
could make the spelling of names fully compatible.
The full catalog is distributed through the CDS and can be extracted
from HYPERLEDA, http://leda.univ-lyon1.fr/ .
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
pgc.dat 342 983261 Catalog of galaxies (table 5 in the paper)
accro.dat 80 50 Table of adopted acronyms (table 2 in the paper)
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See also:
http://leda.univ-lyon1.fr/ : the Hyperleda Home Page
VII/238 : HYPERLEDA. II. Catalog of homogenized HI data (Paturel+, 2003)
Byte-by-byte Description of file: pgc.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [PCG]
4- 10 I7 --- PGC [1/3099300] PGC number
12 A1 --- --- [J]
13- 14 I2 h RAh Right ascension (J2000)
15- 16 I2 min RAm Right ascension (J2000)
17- 20 F4.1 s RAs Right ascension (J2000)
21 A1 --- DE- Declination sign (J2000)
22- 23 I2 deg DEd Declination (J2000)
24- 25 I2 arcmin DEm Declination (J2000)
26- 27 I2 arcsec DEs Declination (J2000)
29- 30 A2 --- OType [GM ] Object type (1)
32- 36 A5 --- MType Provisional morphological type from LEDA
according to the RC2 code.
37- 41 F5.2 [0.1arcmin] logD25 ?=9.99 Apparent diameter (2)
42- 44 A3 --- --- [±]
45- 48 F4.2 [0.1arcmin] e_logD25 ?=9.99 Actual error of logD25
51- 54 F4.2 [---] logR25 ?=9.99 Axis ratio in log scale
(log of major axis to minor axis)
55- 57 A3 --- --- [±]
58- 61 F4.2 [---] e_logR25 ?=9.99 Actual error on logR25
64- 67 F4.0 deg PA ?=999. Adopted 1950-position angle (3)
68- 70 A3 --- --- [±]
71- 74 F4.0 deg e_PA ?=999. rms uncertainty on PA
76- 77 I2 --- o_ANames Number of alternate names.
79-341 A263 --- ANames Alternate names (4)
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Note (1): 'G', galaxies; 'M', multiple system; GM, galaxy in multiple system.
Note (2): Apparent diameter in log scale (D in 0.1arcmin) converted to the
RC3 system at the isophote 25B-mag/arcsec2 (section 3);
Note (3): Adopted 1950-position angle, measured from the North to the East.
Its value covers the range 0-180. A few values exactly equal to zero
are taken as 180.
Note (4): Alternate names following the hierarchy given in accro.dat file.
Up to 12 names, each 22 bytes long, is given here.
Names that correspond to a multiple system are written in parenthesis.
151 Names that do not agree with NED identification have been written
with a question mark (?). 677 names that have been moved from one
galaxy to another since the first catalog have been written with an
exclamation point (!).
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Byte-by-byte Description of file: accro.dat
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Bytes Format Units Label Explanations
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1- 23 A23 --- Name Example of the name (1)
25- 51 A27 --- Aut Authors' name
53- 82 A30 ---- Ref BibCode or catalog number
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Note (1): For each adopted acronym we give an example of a name and the
reference where the acronym was created. When an acronym comes from
several references (e.g., KUG), we give the latest reference that
lists the former ones.
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Acknowledgements: Georges Paturel
(End) Patricia Bauer [CDS] 28-Nov-2003