CORE
🇺🇦
make metadata, not war
Services
Services overview
Explore all CORE services
Access to raw data
API
Dataset
FastSync
Content discovery
Recommender
Discovery
OAI identifiers
OAI Resolver
Managing content
Dashboard
Bespoke contracts
Consultancy services
Support us
Support us
Membership
Sponsorship
Community governance
Advisory Board
Board of supporters
Research network
About
About us
Our mission
Team
Blog
FAQs
Contact us
Dissecting the long-term emission behaviour of the BL Lac object Mrk 421
Authors
Acosta-Pulido J.
Agudo I.
+68 more
Arévalo M.
Bachev R.
Barnes J.
Boeva S.
Bozhilov V.
Carnerero M.
Carosati D.
Casadio C.
Chen W.
D'Ammando F.
Damljanovic G.
Eswaraiah E.
Forné E.
Gantchev G.
González-Morales P.
Grishina T.
Griñón-Marín A.
Gómez J.
Holden M.
Ibryamov S.
Joner M.
Jordan B.
Jorstad S.
Joshi M.
Kopatskaya E.
Koptelova E.
Kurtanidze O.
Kurtanidze S.
Larionov V.
Larionova E.
Larionova L.
Latev G.
Ligustri R.
Lin H.
Lázaro C.
Marscher A.
Martínez-Lombilla C.
McBreen B.
Mihov B.
Molina S.
Moody J.
Morozova D.
Nikolashvili M.
Nilsson K.
Ovcharov E.
Pace C.
Panwar N.
Pastor Yabar A.
Pearson R.
Pinna F.
Protasio C.
Raiteri C.
Redondo-Lorenzo F.
Rizzi N.
Rodríguez-Coira G.
Ros J.
Sadun A.
Savchenko S.
Semkov E.
Slavcheva-Mihova L.
Smith N.
Smith P.
Strigachev A.
Troitskaya Y.
Troitsky I.
Vasilyev A.
Villata M.
Vince O.
Publication date
1 January 2017
Publisher
Abstract
© 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. We report on long-term multiwavelength monitoring of blazar Mrk 421 by the GLAST-AGILE Support Program of the Whole Earth Blazar Telescope (GASP-WEBT) collaboration and Steward Observatory, and by the Swift and Fermi satellites. We study the source behaviour in the period 2007-2015, characterized by several extreme flares. The ratio between the optical, X-ray and γ-ray fluxes is very variable. The γ-ray flux variations show a fair correlation with the optical ones starting from 2012. We analyse spectropolarimetric data and find wavelength-dependence of the polarization degree (P), which is compatible with the presence of the host galaxy, and no wavelength dependence of the electric vector polarization angle (EVPA). Optical polarimetry shows a lack of simple correlation between P and flux and wide rotations of the EVPA. We build broad-band spectral energy distributions with simultaneous near-infrared and optical data from the GASP-WEBT and ultraviolet and X-ray data from the Swift satellite. They show strong variability in both flux and X-ray spectr al shape and suggest a shift of the synchrotron peak up to a factor of ~50 in frequency. The interpretation of the flux and spectral variability is compatible with jet models including at least two emitting regions that can change their orientation with respect to the line of sight
Similar works
Full text
Open in the Core reader
Download PDF
Available Versions
Kazan Federal University Digital Repository
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:dspace.kpfu.ru:net/129555
Last time updated on 07/05/2019