@article{72ba17722a1e48cf9c2a322fa4e3b008,
title = "Searching for extragalactic sources in the VISTA variables in the V{\'I}a l{\'a}ctea survey",
abstract = "We search for extragalactic sources in the VISTA Variables in the V{\'i}a L{\'a}ctea survey that are hidden by the Galaxy. Herein, we describe our photometric procedure to find and characterize extragalactic objects using a combination of SExtractor and PSFEx. It was applied in two tiles of the survey: d010 and d115, without previous extragalactic IR detections, in order to obtain photometric parameters of the detected sources. The adopted criteria to define extragalactic candidates include CLASS-STAR < 0.3; 1.0 < R1 2 < 5.0 arcsec; 2.1 < C < 5; and F > 0.002 and the colors: 0.5 < (J-Ks) < 2.0 mag; 0.0 < (J-H) < 1.0 mag; 0.0 < (H-Ks) < 2.0 mag and (J-H) + 0.9 (H-Ks) > 0.44 mag. We detected 345 and 185 extragalactic candidates in the d010 and d115 tiles, respectively. All of them were visually inspected and confirmed to be galaxies. In general, they are small and more circular objects, due to the near-IR sensitivity to select more compact objects with higher surface brightness. The procedure will be used to identify extragalactic objects in other tiles of the VVV disk, which will allow us to study the distribution of galaxies and filaments hidden by the Milky Way.",
keywords = "Catalogs, Galaxies: Fundamental Parameters, Galaxies: Photometry, Surveys",
author = "Baravalle, {Laura D.} and {Victoria Alonso}, M. and Castell{\'o}n, {Jos{\'e} Luis Nilo} and Beam{\'i}n, {Juan Carlos} and Dante Minniti",
note = "Funding Information: IRAF: the Image Reduction and Analysis Facility is distributed by the National Optical Astronomy Observatories, which is operated by the Association of Universities for Research in Astronomy, Inc. (AURA) under cooperative agreement with the National Science Foundation (NSF). Funding Information: We would like to thank the anonymous referee for the suggestions to improve the manuscript. We would also thank I-Non Chiu for assisting us with the use of the ComEst package and Dar{\'i}o Gra{\~n}a for his technical support. This work was partially supported by grants from the Secretar{\'i}a de Ciencia y T{\'e}cnica (Secyt) of Universidad Nacional de C{\'o}rdoba (UNC) and Consejo de Investigaciones Cient{\'i}ficas y T{\'e}cnicas (CON-ICET, PIP No. 112-20110101014). L.D.B. acknowledges the financial support for her PhD thesis from Secyt (UNC) and CONICET. J.L.N.C. is also grateful for financial support received from the Programa de Incentivo a la Investigaci{\'o}n Acad{\'e}mica de la Direcci{\'o}n de Investigaci{\'o}n de la Universidad de La Serena (PIA-DIULS), Programa DIULS de Iniciaci{\'o}n Cient{\'i}fica No. PI15142. J.L.N.C. also acknowledges the financial support from the grant program No. FA9550-15-1-0167 of the Southern Office of Aerospace Research and Development (SOARD), a branch of the Air Force Office of the Scientific Research{\textquoteright}s International Office of the United States (AFOSR/IO). J.C.B. acknowledges support from programa ESO-C{\'o}mite mixto, Gobierno de Chile. Funding Information: We gratefully acknowledge data from the ESO Public Survey program ID 179.B-2002 taken with the VISTA telescope, and products from the Cambridge Astronomical Survey Unit (CASU). D.M. is supported by the BASAL Center for Astrophysics and Associated Technologies (CATA) through grant PFB-06, by the Ministry for the Economy, Development and Tourism, Programa Iniciativa Cient{\'i}fica Milenio grant IC120009, awarded to the Millennium Institute of Astrophysics (MAS), and by FONDECYT No. 1170121. Publisher Copyright: {\textcopyright} 2018. The American Astronomical Society. All rights reserved.",
year = "2018",
month = jan,
day = "1",
doi = "10.3847/1538-3881/aa9ee2",
language = "English",
volume = "155",
journal = "Astronomical Journal",
issn = "0004-6256",
publisher = "American Astronomical Society",
number = "1",
}