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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28583
Title: VVV-WIT-04: an extragalactic variable source caught by the VVV Survey
Authors: Roberto K. Saito
Dante Minniti
Valentin D. Ivanov
MASETTI, NICOLA 
Maria Gabriela Navarro
Roberto Cid Fernandes
Daniel Ruschel-Dutra
Leigh C. Smith
Philip W. Lucas
Carlos Gonzalez-Fernandez
Rodrigo Contreras Ramos
Issue Date: 2019
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 490
Issue: 1
First Page: 1171
Abstract: We report the discovery of VVV-WIT-04, a near-infrared variable source towards the Galactic disk located ~0.2 arcsec apart from the position of the radio source PMN J1515-5559. The object was found serendipitously in the near-IR data of the ESO public survey VISTA Variables in the V\'ia L\'actea (VVV). Our analysis is based on variability, multicolor, and proper motion data from VVV and VVV eXtended surveys, complemented with archive data at longer wavelengths. We suggest that VVV-WIT-04 has an extragalactic origin as the near-IR counterpart of PMN J1515-5559. The Ks-band light-curve of VVV-WIT-04 is highly variable and consistent with that of an Optically Violent Variable (OVV) quasar. The variability in the near-IR can be interpreted as the redshifted optical variability. Residuals to the proper motion varies with the magnitude suggesting contamination by a blended source. Alternative scenarios, including a transient event such as a nova or supernova, or even a binary microlensing event are not in agreement with the available data.
URI: http://hdl.handle.net/20.500.12386/28583
URL: https://academic.oup.com/mnras/article/490/1/1171/5572280
ISSN: 0035-8711
DOI: 10.1093/mnras/stz2631
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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