2023AJ....165..123D

Query : 2023AJ....165..123D

2023AJ....165..123D - Astron. J., 165, 123 (2023/March-0)

Identification of Galaxy Shreds in Large Photometric Catalogs Using Convolutional Neural Networks.

DI TEODORO E.M., PEEK J.E.G. and WU J.F.

Abstract (from CDS):

Contamination from galaxy fragments, identified as sources, is a major issue in large photometric galaxy catalogs. In this paper, we prove that this problem can be easily addressed with computer vision techniques. We use image cutouts to train a convolutional neural network (CNN) to identify cataloged sources that are in reality just star-formation regions and/or shreds of larger galaxies. The CNN reaches an accuracy ∼98% on our testing data sets. We apply this CNN to galaxy catalogs from three among the largest surveys available today: the Sloan Digital Sky Survey, the DESI Legacy Imaging Surveys, and the Panoramic Survey Telescope and Rapid Response System Survey. We find that, even when strict selection criteria are used, all catalogs still show a ∼5% level of contamination from galaxy shreds. Our CNN gives a simple yet effective solution to clean galaxy catalogs from these contaminants.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Sky surveys - Catalogs - Astronomical techniques - Convolutional neural networks - Galaxy evolution

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 MCG-02-05-053 LSB 01 49 10.384 -10 03 38.54   13.1   12.37 13.4 ~ 73 0

Query : 2023AJ....165..123D

Basic data :
MCG-02-05-053 -- Low Surface Brightness Galaxy
Other object types: otypes_help 		LSB (), G (2014ApJ,UGCA,...), HI (2016A&A,HIPASS), IR (IRAS,PSCz), EmG (2022ApJS), AG? (2020MNRAS), * (GSC), Opt (SDSS)
ICRS coord. (ep=J2000) : 		01 49 10.384 -10 03 38.54 (Infrared) [ ] C 2006AJ....131.1163S
FK4 coord. (ep=B1950 eq=1950) : 		01 46 42.078 -10 18 31.77 [ ]
Gal coord. (ep=J2000) : 		164.235726 -68.171360 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 1992.5 [~] / z(emission) 0.006668 [~] / cz 1999.17 [~]
   (Rad) C 2004MNRAS.350.1195M
Morphological type: 		SA_B C 2019MNRAS.488..590B
Angular size (arcmin): 		1.72566 1.56932 147 (Opt) B 2023ApJS..269....3M
Fluxes (11) :
B 13.1 [~] D 2005MNRAS.361...34D
R 12.37 [~] D 2009MNRAS.399..683J
I 13.4 [~] D 2005MNRAS.361...34D
J 11.722 [0.037] C 2006AJ....131.1163S
H 11.332 [0.062] C 2006AJ....131.1163S
K 10.969 [0.080] C 2006AJ....131.1163S
u (AB) 15.43 [0.01] D 2009ApJS..182..543A
g (AB) 13.4671 [0.0014] B 2023ApJS..269....3M
r (AB) 13.0042 [0.0012] B 2023ApJS..269....3M
i (AB) 13.495 [0.003] C 2009ApJS..182..543A
z (AB) 12.6756 [0.0011] B 2023ApJS..269....3M
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 4 : 3 Display criteria :

Identifiers (13) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

UGCA 21 HIPASS J0149-10b LEDA 6667 SDSS J014910.35-100340.4
6dFGS gJ014910.4-100339 IRAS 01466-1018 2MASX J01491038-1003385
GSC 05278-00217 IRAS F01466-1018 MCG-02-05-053
HIPASS J0149-10 LCSB L73 PSCz Q01466-1018

References (73 between 1850 and 2026) (Total 73)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 11   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : MCG-02-05-053

Link by name to the catalogue in VizieR :

GSC 05278-00217 HIPASS J0149-10 HIPASS J0149-10b IRAS 01466-1018 IRAS F01466-1018
2MASX J01491038-1003385 SDSS J014910.35-100340.4

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