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Visual survey of 18 020 objects from the 2MFGC catalog

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Abstract

We conducted a continuous survey of infrared and visual images of 18 020 2MFGC galaxies which were selected on an automatic basis from 1.64 mln extended objects of the 2MASS XSC catalog based on the ratio of the infrared axes a/b ≥ 3. This work aims to exclude “false” objects from the list of flat galaxies. Having observed more than 80 thousand images in different filters, we were able to detect 1512 such objects (8.4% of the total number). We found 23 galaxies duplicated in 2MASS, which have two 2MFGC numbers correspondingly, and three flat galaxies which are not included in other catalogs and are located close to three “false” galaxies. Galaxies with magnitudes fainter than K s = 13m compose the main part of the excluded objects. They show small angular sizes, low surface brightnesses and concentration ratios. The results of the work in the form of the 2MFGC table with notes are given in the astronomical databases VizieR, NED, HyperLeda.

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Authors and Affiliations

  1. Special Astrophysical Observatory, Russian Academy of Sciences, Nizhnii Arkhyz, 369167, Russia

    S. N. Mitronova & G. G. Korotkova

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  1. S. N. Mitronova
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  2. G. G. Korotkova
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Correspondence to S. N. Mitronova.

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Original Russian Text © S.N. Mitronova, G.G. Korotkova, 2015, published in Astrofizicheskii Byulleten, 2015, Vol. 70, No. 1, pp. 24–33.

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Mitronova, S.N., Korotkova, G.G. Visual survey of 18 020 objects from the 2MFGC catalog. Astrophys. Bull. 70, 24–32 (2015). https://doi.org/10.1134/S1990341315010034

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  • DOI: https://doi.org/10.1134/S1990341315010034

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