onr:"swepub:oai:DiVA.org:kth-143983"
Search: onr:"swepub:oai:DiVA.org:kth-143983" > Multiwavelength obs...
- 1 of 1
- Previous record
- Next record
- To hitlist
Multiwavelength observations of the gamma-ray-emitting narrow-line Seyfert 1 PMN J0948+0022 in 2011
- D'Ammando, F. (author)
-
- Larsson, Josefin (author)
- KTH,Partikel- och astropartikelfysik
- Orienti, M. (author)
- show more...
- Raiteri, C. M. (author)
- Angelakis, E. (author)
- Carraminana, A. (author)
- Carrasco, L. (author)
- Drake, A. J. (author)
- Fuhrmann, L. (author)
- Giroletti, M. (author)
- Hovatta, T. (author)
- Max-Moerbeck, W. (author)
- Porras, A. (author)
- Readhead, A. C. S. (author)
- Recillas, E. (author)
- Richards, J. L. (author)
- show less...
- (creator_code:org_t)
- 2014-01-28
- 2014
- English.
- In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 438:4, s. 3521-3534
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- We report on radio-to-gamma-ray observations during 2011 May-September of PMN J0948+0022, the first narrow-line Seyfert 1 (NLSy1) galaxy detected in gamma-rays by Fermi-Large Area Telescope. Strong variability was observed in gamma-rays, with two flaring periods peaking on 2011 June 20 and July 28. The variability observed in optical and near-infrared seems to have no counterpart in gamma-rays. This different behaviour could be related to a bending and inhomogeneous jet or a turbulent extreme multicell scenario. The radio spectra showed a variability pattern typical of relativistic jets. The XMM spectrum shows that the emission from the jet dominates above similar to 2 keV, while a soft X-ray excess is evident in the low-energy part of the X-ray spectrum. Models where the soft emission is partly produced by blurred reflection or Comptonization of the thermal disc emission provide good fits to the data. The X-ray spectral slope is similar to that found in radio-quiet NLSy1, suggesting that a standard accretion disc is present, as expected from the high accretion rate. Except for the soft X-ray excess, unusual in jet-dominated active galactic nuclei, PMN J0948+0022, shows all characteristics of the blazar class.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- galaxies: active
- galaxies: individual: (PMN J0948+0022)
- galaxies: nuclei
- galaxies: Seyfert
- gamma-rays: galaxies
- gamma-rays: general
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
- Monthly notices of the Royal Astronomical Society (Search for host publication in LIBRIS)
To the university's database
- 1 of 1
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- D'Ammando, F.
- Larsson, Josefin
- Orienti, M.
- Raiteri, C. M.
- Angelakis, E.
- Carraminana, A.
- show more...
- Carrasco, L.
- Drake, A. J.
- Fuhrmann, L.
- Giroletti, M.
- Hovatta, T.
- Max-Moerbeck, W.
- Porras, A.
- Readhead, A. C. ...
- Recillas, E.
- Richards, J. L.
- show less...
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- and Astronomy Astrop ...
- Articles in the publication
- Monthly notices ...
- By the university
- Royal Institute of Technology
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
