Radio follow-up of the γ-ray flaring gravitational lens JVAS B0218+357

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Spingola, C. Dallacasa, D. Orienti, M. Giroletti, M. McKean, J. P. Cheung, C. C. Hovatta, T. Ciprini, S. D'Ammando, F. Falco, E. Larsson, S. Max-Moerbeck, W. Ojha, R. Readhead, A. C S Richards, J. L. Scargle, J. 2017-05-11T09:07:05Z 2017-05-11T09:07:05Z 2016-04-01
dc.identifier.citation Spingola , C , Dallacasa , D , Orienti , M , Giroletti , M , McKean , J P , Cheung , C C , Hovatta , T , Ciprini , S , D'Ammando , F , Falco , E , Larsson , S , Max-Moerbeck , W , Ojha , R , Readhead , A C S , Richards , J L & Scargle , J 2016 , ' Radio follow-up of the γ-ray flaring gravitational lens JVAS B0218+357 ' MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY , vol 457 , no. 2 , pp. 2263-2271 . DOI: 10.1093/mnras/stw136 en
dc.identifier.issn 0035-8711
dc.identifier.issn 1365-2966
dc.identifier.other PURE UUID: c7892793-9c67-4716-b73b-13348c342e80
dc.identifier.other PURE ITEMURL:
dc.identifier.other PURE LINK:
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dc.description.abstract We present results on multifrequency Very Long Baseline Array (VLBA) monitoring observations of the double-image gravitationally lensed blazar JVAS B0218+357. Multi-epoch observations started less than one month after the γ -ray flare detected in 2012 by the Large Area Telescope on board Fermi, and spanned a 2-month interval. The radio light curves did not reveal any significant flux density variability, suggesting that no clear correlation between the high-energy and low-energy emission is present. This behaviour was confirmed also by the long-term Owens Valley Radio Observatory monitoring data at 15 GHz. The milliarcsecondscale resolution provided by the VLBA observations allowed us to resolve the two images of the lensed blazar, which have a core-jet structure. No significant morphological variation is found by the analysis of the multi-epoch data, suggesting that the region responsible for the γ -ray variability is located in the core of the active galactic nuclei, which is opaque up to the highest observing frequency of 22 GHz. en
dc.format.extent 9
dc.format.extent 2263-2271
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Volume 457, issue 2 en
dc.rights openAccess en
dc.subject.other Space and Planetary Science en
dc.subject.other Astronomy and Astrophysics en
dc.subject.other 115 Astronomy and space science en
dc.title Radio follow-up of the γ-ray flaring gravitational lens JVAS B0218+357 en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department INAF Istituto di Radioastronomia
dc.contributor.department University of Groningen
dc.contributor.department Naval Research Laboratory
dc.contributor.department Metsähovi Radio Observatory
dc.contributor.department Agenzia Spaziale Italiana
dc.contributor.department Harvard-Smithsonian Center for Astrophysics
dc.contributor.department KTH Royal Institute of Technology
dc.contributor.department National Radio Astronomy Observatory Socorro
dc.contributor.department NASA Goddard Space Flight Center
dc.contributor.department California Institute of Technology
dc.contributor.department Purdue University
dc.contributor.department NASA Ames Research Center
dc.subject.keyword Gravitational lensing: strong
dc.subject.keyword Quasars: individual: JVAS B0218+357
dc.subject.keyword Space and Planetary Science
dc.subject.keyword Astronomy and Astrophysics
dc.subject.keyword 115 Astronomy and space science
dc.identifier.urn URN:NBN:fi:aalto-201705114223
dc.identifier.doi 10.1093/mnras/stw136
dc.type.version publishedVersion

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