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dc.contributor.authorPolednikova, Jana
dc.contributor.authorEderoclite, Alessandro
dc.contributor.authorCepa, Jordi
dc.contributor.authorDiego Onsurbe, José Antonio de
dc.contributor.authorGonzález Serrano, José Ignacio 
dc.contributor.otherUniversidad de Cantabriaes_ES
dc.date.accessioned2022-07-01T13:23:42Z
dc.date.available2022-07-01T13:23:42Z
dc.date.issued2014
dc.identifier.isbn978-1-107-04524-8
dc.identifier.otherAYA2011-29517-C03-01es_ES
dc.identifier.otherAYA2011-29517-C03-02es_ES
dc.identifier.urihttp://hdl.handle.net/10902/25245
dc.description.abstractWe present results from a project focused on searching optical microvariabilty (also known as “intra-night” variability) in type 2 - obscured - quasars. Optical microvariability can be described as very small changes in the flux, typically in the order of hundredths of magnitude, which can be observed on timescales of hours. Such studies have been so far conducted for samples of blazars and type 1, unobscured, AGNs, where the optical microvariability was detected with success. We have focused on obscured targets which would pose a challenge to the AGN standard model. In the present work, however, we have observed a sample of three bright (g mag< 17) type 2 quasar, based on the catalog of type 2 quasars from SDSS of Reyes et al. (2008). The observations were carried out with the 1.5 meter telescope at San Pedro Martir observatory in Mexico. The sample was observed during an observation period of four days in Johnsons V filter, resulting in at least two continuous intervals of observations per target during the observational run. We have obtained differential light curves for our sources as well as for the comparison stars. They were analyzed using one-way analysis of variance statistical test (ANOVA), which has been repeatedly used in the past for studies of unobscured targets. Based on the results from the statistical analysis, we show that at least two out of three observed targets appear to be variable on time scales of hours. So far, this is the first study which confirmed existence of optical microvariability in type 2 quasars.es_ES
dc.description.sponsorshipThis research has been supported by the Spanish Ministerio de Economía y Competitividad (MINECO) under the grant AYA2011-29517-C03-01. J. A. de Diego is grateful for support from grants SAB2010-0011 awarded by the Spanish MIED, and PAPIIT IN110013 awarded by the UNAM. J. I. González-Serrano is grateful for the support from AYA2011-29517-C03-02. The authors also would like to thank our colleague Yair Krongold for useful suggestions on this paper.es_ES
dc.format.extent4 p.es_ES
dc.language.isoenges_ES
dc.sourceMultiwavelength AGN Surveys and Studies (IAU S304), Cambridge University Press, 2014es_ES
dc.subject.otherGalaxies: activees_ES
dc.subject.otherQuasars: individual (Mrk 477, SDSS J075+5050, SDSS J1430+1339)es_ES
dc.titleOptical microvariability of bright type 2 quasarses_ES
dc.typeinfo:eu-repo/semantics/conferenceObjectes_ES
dc.relation.publisherVersionhttps://doi.org/10.1017/S1743921314004414es_ES
dc.rights.accessRightsopenAccesses_ES
dc.identifier.DOI10.1017/S1743921314004414
dc.type.versionpublishedVersiones_ES


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