VII/219 Revised Flat Galaxy Catalogue (RFGC) (Karachentsev+, 1999)
The revised flat galaxy catalogue
Karachentsev I.D., Karachentseva V.E., Kudrya Y.N., Sharina M.E.,
Parnovsky S.L.
<Bull. Special Astrophys. Obs., 47, 5 (1999)>
=1999BSAO...47....5K 1999BSAO...47....5K
ADC_Keywords: Galaxy catalogs ; Morphology ; Magnitudes
Keywords: galaxies: spiral - galaxies: catalogues -
galaxies: large-scale motions in the Universe
Description:
The Flat Galaxy Catalog (FGC) is the result of a systematic search for
disk-like edge-on galaxies with a diameter larger than a=40arcsec and
major-to-minor axis ratio a/b>7 from Palomar Observatory and ESO/SERC
surveys; it contained 4455 objects covering about 56% of the whole sky
(Karachentsev et al., 1993AN....314...97K 1993AN....314...97K, see Cat. VII/162).
The main reasons for preparing a new, improved and supplemented
catalogue version were the following:
- a possibility of remeasuring the coordinates of flat galaxies with a
higher accuracy using the Digital Sky Survey;
- the inclusion the data about "red" galaxy diameters which were
absent earlier;
- a reduction the diameters measured on the J and R films of the
ESO/SERC to the diameter system of the POSS-I (near to a25 system)
that eliminated the difference in photometric depth between two parts
of the catalogue (Kudrya et al. 1997PAZh...23...15K 1997PAZh...23...15K);
- a calculation of total apparent magnitudes (with a standard error
about 0.25mag) for all flat galaxies basing on angular diameters,
surface brightnesses, and other parameter data (Kudrya et al.
1997PAZh...23..730K 1997PAZh...23..730K);
- a possibility to determine the Galaxy absorption values in the
region of each flat galaxy placing using new IR data (Schlegel et al.
1998ApJ...500..525S 1998ApJ...500..525S).
- a necessity to remove the faults noted during the work with the FGC
data.
The structural differences between old and new catalogue versions are:
- both the parts, FGC and FGCE, have been joined in the RFGC (Revised
Flat Galaxy Catalogue) where the galaxies are ranged according to
their Right Ascensions for the epoch J2000.0;
- the Addendum have been omitted;
- the Notes describing concrete object characteristics have been
included in the main corpus of the catalogue, some details were
omitted;
- the lists of identification of the FGC and the FGCE galaxies have
been omitted because these data are accessible now due to different
galaxy databases (NED, LEDA etc).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
rfgc.dat 164 4444 List of new Local Volume dwarf candidates
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See also:
VII/162 : Flat Galaxy Catalogue (Karachentsev+ 1993)
VII/119 : Catalogue of Principal Galaxies (PGC) (Paturel+ 1989)
Byte-by-byte Description of file: rfgc.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- RFGC *[1,4236]?+ Galaxy number
7- 10 I4 --- FGC(E) ? FGC (Cat. VII/162) galaxy number
11 A1 --- m_FGC(E) [E] E when FGCE number
13- 17 I5 --- PGC ? PGC (Cat. VII/119) galaxy number
20- 21 I2 h RAh Right ascension (J2000.0)
23- 24 I2 min RAm Right ascension (J2000.0)
26- 29 F4.1 s RAs Right ascension (J2000.0)
31 A1 --- DE- Declination sign (J2000.0)
32- 33 I2 deg DEd Declination (J2000.0)
35- 36 I2 arcmin DEm Declination (J2000.0)
38- 39 I2 arcsec DEs Declination (J2000.0)
42- 43 I2 h RA1950h Right ascension (J1950.0)
45- 46 I2 min RA1950m Right ascension (J1950.0)
48- 51 F4.1 s RA1950s Right ascension (J1950.0)
53 A1 --- DE1950- Declination sign (J1950.0)
54- 55 I2 deg DE1950d Declination (J1950.0)
57- 58 I2 arcmin DE1950m Declination (J1950.0)
60- 61 I2 arcsec DE1950s Declination (J1950.0)
64- 69 F6.2 deg GLON Galactic longitude
72- 77 F6.2 deg GLAT Galactic latitude
79- 81 I3 deg PA Positional angle
83- 86 I4 --- --- ? RFGC Galaxy number again
88- 92 F5.2 arcmin aO *Major blue diameter
94- 97 F4.2 arcmin bO *Minor blue diameter
99-103 F5.2 arcmin aE *Major red diameter
105-108 F4.2 arcmin bE *Minor red diameter
110-113 F4.1 mag Btot Calculated total apparent magnitude
115-118 F4.2 mag AB Galactic extinction in the B - band
121-122 A2 --- MType *Morphological type of the galaxy
124 I1 --- As *[0,2] Index of apparent asymmetry
of galaxy shape
126-128 A3 --- SB *[IV ] Index of the mean surface brightness
130-131 I2 --- N *Number of significant neighbours
133-164 A32 --- Notes *Notes about the galaxy or environment
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Note on RFGC: the galaxies having reduced diameters a(O) less than 0.6arcmin
are included in the catalogue without new RFGC number.
Note on aO, bO: for FGCE galaxies the conversion from the ESO/SERC
diameter system (J) to the POSS-I one (O) have been made according to
the formulae: a(O) = 0.80788 a(J), b(O) = 0.7827 b(J);
Note on aE, bE: for FGCE galaxies the conversion from the ESO/SERC
diameter system (R) to the POSS-I one (E) have been made according to
the formulae: a(E) = 0.8640 a(R), b(E) = 0.9730 b(R);
Note on MType: morphological type of spiral according to the Hubble
classification. Note that Sb = 3, Sc = 5 etc in number designation;
Note on As: 0 means poorly defined, 2 = pronounced
Note on SB: The index varies from I = high to IV = very low surface brightness
Note on N: N is the number of significant neighbours with angular diameter in
the range from aO/2 to 2*aO in a circle of R=10*aO
Note on Notes: Notes describing the galaxy morphological peculiarities
and/or the galaxy environment. The non-significant companion galaxy
diameters and mutual distances are expressed in arcmin.
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Acknowledgements: Sharina Rita E.
(End) Patricia Bauer, Francois Ochsenbein [CDS] 28-Jan-2000