J/other/AstBu/70.24 Updated 2MFGC catalog (Mitronova+, 2015)
Visual survey of 18020 objects from the 2MFGC catalog.
Mitronova S.N., Korotkova G.G.
<Astrophys. Bull., 70, 24 (2015)>
=2015AstBu..70...24M 2015AstBu..70...24M
ADC_Keywords: Galaxies, IR ; Galaxy catalogs ; Infrared sources ;
Photometry, infrared ; Morphology
Keywords: galaxies: spiral - catalogs - surveys
Abstract:
We spent a solid overview of the infrared and visual images 18020
2MFGC galaxies selected in the automatic mode of 1.64 million.
Extended objects XSC-2MASS catalog with respect infrared axes, a/b≥3.
This work is aimed at excluding "spurious" objects from the list of
flattened galaxies. Browse more than 80000 images in different filters
were able to identify 1512 (8.4% of the total) of such objects. Found
duplicate in 2MASS measurements of 23 galaxies with, respectively, two
rooms 2MFGC, and 3 flat galaxy, not accounted for in other directories
and in close proximity with the three "spurious" galaxies. The main
part of the excluded facilities accounted for magnitudes less
Ks=13mag. They are characterized by small angular size, low surface
brightness and the concentration index. Exception objects identified
significantly reduced the spread of values in the two-dimensional
distribution. Results of work in the form of notes will be placed in
the astronomical database VizieR, NED, HYPERLEDA.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
2mfgc.dat 150 18020 Updated 2MFGC (2MASS-selected Flat Galaxy Catalog)
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See also:
J/other/BSAO/57.5 : 2MASS-selected Flat Galaxy Catalog, 2MFGC (Mitronova+ 2004)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
Byte-by-byte Description of file: 2mfgc.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- 2MFGC [1/18020] 2MFGC galaxy number
7- 8 I2 h RAh Hour of Right Ascension (J2000)
9- 10 I2 min RAm Minute of Right Ascension (J2000)
11- 15 F5.2 s RAs Second of Right Ascension (J2000)
17 A1 --- DE- Sign of the Declination (J2000)
18- 19 I2 deg DEd Degree of Declination (J2000)
20- 21 I2 arcmin DEm Arcminute of Declination (J2000)
22- 25 F4.1 arcsec DEs Arcsecond of Declination (J2000)
27- 31 F5.1 arcsec r ? K-band fiducial elliptical Kron radius
33- 37 F5.2 mag Jmag ? J-band fiducial elliptical Kron magnitudes
39- 43 F5.2 mag Hmag ? H-band fiducial elliptical Kron magnitudes
45- 49 F5.2 mag Kmag ? K-band fiducial elliptical Kron magnitudes
51- 53 F3.2 --- b/a [0/1] Axis ratio for the J+H+K combined
"super coadd" image
55- 57 F3.2 --- b/a1 [0/1] Axis ratio averaged by the individual
J,H,K-band images
59- 61 I3 deg PA [-90/90]? positional angle for the "super coadd"
image measured towards NW
62- 65 F4.1 --- CI [1/12]?=0 J-band concentration index
(3/4 vs 1/4 light radii)
67- 73 I7 --- LEDA ? Galaxy number in the LEDA database
75- 76 F2.1 arcmin d2L [0/0.6]? Distance from the 2MASS-center to
LEDA-object center
78- 93 A16 --- NED Galaxy number in the NED database
94- 95 F2.1 arcmin d2N [0/0.6]? Distance from the 2MASS-center to
NED-object center
97 A1 --- f_2MFGC [#] indicates a "spurious" object (1)
98-150 A53 --- Notes Results of visual review 2MFGC-galaxies (2)
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Note (1): the hash (#) indicate "spurious" objects, which in our view
should be excluded from the list. The 23 duplicated galaxies are
also marked with the "#", followed by the alternative 2MFGC entry.
Note (2): Abbreviations used ((the signs ":" and "?" indicate our doubts):
PofG = pair of galaxies
GG = two or more galaxies
G+S = galaxy and star on line
SS = two or more stars on line
IRbar = in NIR only bar of galaxy
IRcen = in NIR only central part of galaxy
PART = in NIR part of galaxy
nEon = no Edge-on galaxy
asymm = asymmetrical form of galaxy
Interacting = interacting systems
2obj, 3obj = multiple objects with small angular dimensions
MIST = mistake on the 2MASS images
E = elliptical morphology
S = spiral morphology (S0, Sa, Sb, Sc, Sd, Sm)
Irr = irregular galaxies
+S, +SS = one or more stars with comparable size is projected near
+G, +GG = one or more galaxies with comparable size is projected nearby
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Acknowledgements:
Sofia Mitronova, mit(at)sao.ru
History:
* 12-Dec-2014: submitted to CDS (Sofia Mitronova)
* 27-Mar-2015: the "spurious" indicator (#) was isolated in a
dedicated column (f_2MFGC)
(End) Sofia N. Mitronova [SAO RAS], Patricia Vannier [CDS] 12-Dec-2014