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http://hdl.handle.net/20.500.12386/28583
Titolo: | VVV-WIT-04: an extragalactic variable source caught by the VVV Survey | Autori: | 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 |
Data pubblicazione: | 2019 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 490 | Fascicolo: | 1 | Da pagina:: | 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 |
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