Next Article in Journal / Special Issue
Interstellar Scintillation and Scattering of Micro-arc-second AGN
Previous Article in Journal
On the Non-Thermal Energy Content of Cosmic Structures
Previous Article in Special Issue
Consequences of Proton Acceleration in Blazar Jets
Article Menu

Export Article

Open AccessArticle
Galaxies 2016, 4(4), 61;

Investigating the Puzzling Synchrotron Behaviour of Mrk 421

INAF, Osservatorio Astrofisico di Torino, via Osservatorio 20, I-10025 Pino Torinese, Italy
Instituto de Astrofisica de Canarias (IAC). E-38205 La Laguna, Tenerife, Spain
Departamento de Astrofisica, Universidad de La Laguna, E-38206 La Laguna, Tenerife, Spain
Steward Observatory, University of Arizona, Tucson, AZ 85721, USA
Astronomical Institute, St. Petersburg State University, St. Peterburg 198504, Russia
Pulkovo Observatory, St.-Petersburg 196140, Russia
Author to whom correspondence should be addressed.
Academic Editors: Jose L. Gómez, Alan P. Marscher and Svetlana G. Jorstad
Received: 9 September 2016 / Revised: 6 October 2016 / Accepted: 15 October 2016 / Published: 4 November 2016
(This article belongs to the Special Issue Blazars through Sharp Multi-wavelength Eyes)
Full-Text   |   PDF [2059 KB, uploaded 4 November 2016]   |  


We investigate the multiwavelength behaviour of the high-energy peaked BL Lac object (HBL) Mrk 421 at redshift z = 0 . 031 in the period 2007–2015. We use optical photometric, spectroscopic, and polarimetric data and near-infrared data obtained by 35 observatories participating in the GLAST-AGILE Support Program (GASP) of the Whole Earth Blazar Telescope (WEBT), as well as by the Steward Observatory Support of the Fermi Mission. We also employ high-energy data from the Swift (UV and X-rays) satellite to study correlations among emission in different bands. View Full-Text
Keywords: galaxies: active; BL Lacertae objects: general; BL Lacertae objects: individual: Mrk 421; galaxies: jets galaxies: active; BL Lacertae objects: general; BL Lacertae objects: individual: Mrk 421; galaxies: jets

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Carnerero, M.I.; Raiteri, C.M.; Villata, M.; Acosta Pulido, J.A.; Smith, P.S.; Larionov, V.M.; the WEBT Collaboration. Investigating the Puzzling Synchrotron Behaviour of Mrk 421. Galaxies 2016, 4, 61.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Galaxies EISSN 2075-4434 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top