Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
A close look at the γ-ray emitting narrow-line seyfert 1 FBQS J1644+2619
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0003-0065-2933
KTH.
Show others and affiliations
2018 (English)In: Proceedings of Science, Sissa Medialab Srl , 2018Conference paper, Published paper (Refereed)
Abstract [en]

FBQS J1644+2619 is one of the most recently discovered γ-ray emitting Narrow-Line Seyfert 1s (NLSy1s). Here we present a multiwavelength analysis of this source, focussing on a recent 80 ks X-ray observation with XMM-Newton. The spectral energy distribution of the source is similar to the other γ-ray NLSy1s, confirming its blazar-like nature. The X-ray spectrum is characterised by a hard photon index (Γ = 1.66) above 2 keV and a soft excess at lower energies. The hard photon index provides clear evidence that inverse Compton emission from the jet dominates the spectrum, while the soft excess can be explained by a contribution from the underlying Seyfert emission. This contribution can be fitted by reflection of emission from the base of the jet, as well as by Comptonisation in a warm, optically thick corona. We also compare these results with X-ray observations of other γ-ray NLSy1s. The majority of the sources have similar X-ray spectra, with properties intermediate between blazars and radio-quiet NLSy1s.

Place, publisher, year, edition, pages
Sissa Medialab Srl , 2018.
Keywords [en]
Galaxies, Photons, X ray spectrographs, X rays, Inverse Compton, Lower energies, Multiwavelength, Narrow lines, Spectral energy distribution, X ray spectrum, X-ray observations, X-ray spectra, Gamma rays
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:kth:diva-268520Scopus ID: 2-s2.0-85073720711OAI: oai:DiVA.org:kth-268520DiVA, id: diva2:1413543
Conference
2018 Revisiting Narrow-Line Seyfert 1 Galaxies and their Place in the Universe, NLS1 2018, 9 April 2018 through 13 April 2018
Note

QC 20200310

Available from: 2020-03-10 Created: 2020-03-10 Last updated: 2020-03-10Bibliographically approved

Open Access in DiVA

No full text in DiVA

Scopus

Authority records BETA

Larsson, JosefinFalocco, Serena

Search in DiVA

By author/editor
Larsson, JosefinFalocco, Serena
By organisation
Particle and Astroparticle PhysicsKTH
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf