Spectral energy distribution of Markarian 501: Quiescent state versus extreme outburst

The very high energy (VHE; E > 100GeV) blazar Markarian 501 (Mrk 501) has a well-studied history of extreme spectral variability and is an excellent laboratory for studying the physical processes within the jets of active galactic nuclei. However, there are few detailed multiwavelength studies of...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autor principal: Acciari, V.A.
Formato: JOUR
Materias:
galaxies: active
gamma rays: Galaxies
radiation mechanisms: non-thermal
X-rays: galaxies
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0004637X_v729_n1_p_Acciari
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_0004637X_v729_n1_p_Acciari
record_format dspace
spelling todo:paper_0004637X_v729_n1_p_Acciari2023-10-03T14:02:14Z Spectral energy distribution of Markarian 501: Quiescent state versus extreme outburst Acciari, V.A. galaxies: active gamma rays: Galaxies radiation mechanisms: non-thermal X-rays: galaxies The very high energy (VHE; E > 100GeV) blazar Markarian 501 (Mrk 501) has a well-studied history of extreme spectral variability and is an excellent laboratory for studying the physical processes within the jets of active galactic nuclei. However, there are few detailed multiwavelength studies of Mrk 501 during its quiescent state, due to its low luminosity. A short-term multiwavelength study of Mrk 501 was coordinated in 2009 March, focusing around a multi-day observation with the Suzaku X-ray satellite and including γ-ray data from VERITAS, MAGIC, and the Fermi Gamma-ray Space Telescope with the goal of providing a well-sampled multiwavelength baseline measurement of Mrk 501 in the quiescent state. The results of these quiescent-state observations are compared to the historically extreme outburst of 1997 April 16, with the goal of examining variability of the spectral energy distribution (SED) between the two states. The derived broadband SED shows the characteristic double-peaked profile. We find that the X-ray peak shifts by over two orders of magnitude in photon energy between the two flux states while the VHE peak varies little. The limited shift in the VHE peak can be explained by the transition to the Klein-Nishina (KN) regime. Synchrotron self-Compton models are matched to the data and the implied KN effects are explored. © 2011. The American Astronomical Society. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0004637X_v729_n1_p_Acciari
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic galaxies: active
gamma rays: Galaxies
radiation mechanisms: non-thermal
X-rays: galaxies
spellingShingle galaxies: active
gamma rays: Galaxies
radiation mechanisms: non-thermal
X-rays: galaxies
Acciari, V.A.
Spectral energy distribution of Markarian 501: Quiescent state versus extreme outburst
topic_facet galaxies: active
gamma rays: Galaxies
radiation mechanisms: non-thermal
X-rays: galaxies
description The very high energy (VHE; E > 100GeV) blazar Markarian 501 (Mrk 501) has a well-studied history of extreme spectral variability and is an excellent laboratory for studying the physical processes within the jets of active galactic nuclei. However, there are few detailed multiwavelength studies of Mrk 501 during its quiescent state, due to its low luminosity. A short-term multiwavelength study of Mrk 501 was coordinated in 2009 March, focusing around a multi-day observation with the Suzaku X-ray satellite and including γ-ray data from VERITAS, MAGIC, and the Fermi Gamma-ray Space Telescope with the goal of providing a well-sampled multiwavelength baseline measurement of Mrk 501 in the quiescent state. The results of these quiescent-state observations are compared to the historically extreme outburst of 1997 April 16, with the goal of examining variability of the spectral energy distribution (SED) between the two states. The derived broadband SED shows the characteristic double-peaked profile. We find that the X-ray peak shifts by over two orders of magnitude in photon energy between the two flux states while the VHE peak varies little. The limited shift in the VHE peak can be explained by the transition to the Klein-Nishina (KN) regime. Synchrotron self-Compton models are matched to the data and the implied KN effects are explored. © 2011. The American Astronomical Society. All rights reserved.
format JOUR
author Acciari, V.A.
author_facet Acciari, V.A.
author_sort Acciari, V.A.
title Spectral energy distribution of Markarian 501: Quiescent state versus extreme outburst
title_short Spectral energy distribution of Markarian 501: Quiescent state versus extreme outburst
title_full Spectral energy distribution of Markarian 501: Quiescent state versus extreme outburst
title_fullStr Spectral energy distribution of Markarian 501: Quiescent state versus extreme outburst
title_full_unstemmed Spectral energy distribution of Markarian 501: Quiescent state versus extreme outburst
title_sort spectral energy distribution of markarian 501: quiescent state versus extreme outburst
url http://hdl.handle.net/20.500.12110/paper_0004637X_v729_n1_p_Acciari
work_keys_str_mv AT acciariva spectralenergydistributionofmarkarian501quiescentstateversusextremeoutburst
_version_ 1807314761252077568

Ejemplares similares