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dc.contributor.authorGiroletti, M.
dc.contributor.authorParagi, Z.
dc.contributor.authorBignall, H.
dc.contributor.authorDoi, A.
dc.contributor.authorFoschini, L.
dc.contributor.authorGabányi, K. É.
dc.contributor.authorReynolds, C.
dc.contributor.authorBlanchard, J.
dc.contributor.authorCampbell, R. M.
dc.contributor.authorColomer, F.
dc.contributor.authorHong, X.
dc.contributor.authorKadler, M.
dc.contributor.authorKino, M.
dc.contributor.authorvan Langevelde, H. J.
dc.contributor.authorNagai, H.
dc.contributor.authorPhillips, C.
dc.contributor.authorSekido, M.
dc.contributor.authorSzomoru A.
dc.contributor.authorTzioumis A. K.
dc.date.accessioned2017-01-30T12:28:32Z
dc.date.available2017-01-30T12:28:32Z
dc.date.created2012-03-11T20:00:47Z
dc.date.issued2011
dc.identifier.citationGiroletti, M. and Paragi, Z. and Bignall, H. and Doi, A. and Foschini, L. and Gabányi, K. É. and Reynolds, C. et al. 2011. Global e-VLBI observations of the gamma-ray narrow line Seyfert 1PMN J0948+0022. Astronomy and Astrophysics. 528 (L11).
dc.identifier.urihttp://hdl.handle.net/20.500.11937/21963
dc.identifier.doi10.1051/0004-6361/201116639
dc.description.abstract

Context: There is growing evidence of relativistic jets in radio-loud narrow-line Seyfert 1 (RL-NLS1) galaxies. Aims: We constrain the observational properties of the radio emission in the first RL-NLS1 galaxy ever detected in gamma-rays, PMN J0948+0022, i.e., its flux density and structure in both total intensity and polarization, its compactness, and variability. Methods: We performed three real-time e-VLBI observations of PMN J0948+0022 at 22 GHz, using a global array including telescopes in Europe, East Asia, and Australia. These are the first e-VLBI science observations ever carried out with a global array, reaching a maximum baseline length of 12 458 km. The observations were part of a large multiwavelength campaign in 2009. Results: The source is detected at all three epochs. The structure is dominated by a bright component, more compact than 55   μas, with a fainter component at a position angle θ ~ 35°. Relativistic beaming is required by the observed brightness temperature of 3.4 × 1011 K. Polarization is detected at a level of about 1%. Conclusions: The parameters derived by the VLBI observations, in addition to the broad-band properties, confirm that PMN J0948+0022 is similar to flat spectrum radio quasars. Global e-VLBI is a reliable and promising technique for future studies.

dc.publisherEDP Sciences
dc.subjectgalaxies: active / galaxies: Seyfert / galaxies: jets / instrumentation: high angular resolution / instrumentation: interferometers
dc.titleGlobal e-VLBI observations of the gamma-ray narrow line Seyfert 1PMN J0948+0022
dc.typeJournal Article
dcterms.source.volume528
dcterms.source.numberL11
dcterms.source.issn0004-6361
dcterms.source.titleAstronomy and Astrophysics
curtin.note

Copyright © 2011 The European Southern Observatory (ESO)

curtin.departmentCurtin Institute of Radio Astronomy
curtin.accessStatusOpen access


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