Very high energy outburst of Markarian 501 in May 2009

The very high energy (VHE; E> 100 GeV) blazar Markarian 501 was observed between April 17 and May 5 (MJD 54 938-54 956), 2009, as part of an extensive multi-wavelength campaign from radio to VHE. Strong VHE γ-ray activity was detected on May 1st with Whipple and VERITAS, when the flux (E &...

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Detalles Bibliográficos
Autor principal: Aliu, E.
Formato: JOUR
Materias:
BL Lacertae objects: individual: Mrk 501
Gamma rays: galaxies
Polarization
BL Lacertae objects
Crab nebula
Multi-wavelength campaigns
Polarization angle
Quiescent state
Spectral variability
Very high energies
Gamma rays
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00046361_v594_n_p_Aliu
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00046361_v594_n_p_Aliu
record_format dspace
spelling todo:paper_00046361_v594_n_p_Aliu2023-10-03T14:01:01Z Very high energy outburst of Markarian 501 in May 2009 Aliu, E. BL Lacertae objects: individual: Mrk 501 Gamma rays: galaxies Polarization BL Lacertae objects Crab nebula Gamma rays: galaxies Multi-wavelength campaigns Polarization angle Quiescent state Spectral variability Very high energies Gamma rays The very high energy (VHE; E> 100 GeV) blazar Markarian 501 was observed between April 17 and May 5 (MJD 54 938-54 956), 2009, as part of an extensive multi-wavelength campaign from radio to VHE. Strong VHE γ-ray activity was detected on May 1st with Whipple and VERITAS, when the flux (E > 400 GeV) increased to 10 times the pre-flare baseline flux (3.9 × 10-11 ph cm-2 s-1), reaching five times the flux of the Crab Nebula. This coincided with a decrease in the optical polarization and a rotation of the polarization angle by 15°. This VHE flare showed a fast flux variation with an increase of a factor ∼4 in 25 min, and a falling time of ∼50 min. We present the observations of the quiescent state previous to the flare and of the high state after the flare, focusing on the flux and spectral variability from Whipple, VERITAS, Fermi-LAT, RXTE, and Swift combined with optical and radio data. © 2016 ESO. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00046361_v594_n_p_Aliu
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic BL Lacertae objects: individual: Mrk 501
Gamma rays: galaxies
Polarization
BL Lacertae objects
Crab nebula
Gamma rays: galaxies
Multi-wavelength campaigns
Polarization angle
Quiescent state
Spectral variability
Very high energies
Gamma rays
spellingShingle BL Lacertae objects: individual: Mrk 501
Gamma rays: galaxies
Polarization
BL Lacertae objects
Crab nebula
Gamma rays: galaxies
Multi-wavelength campaigns
Polarization angle
Quiescent state
Spectral variability
Very high energies
Gamma rays
Aliu, E.
Very high energy outburst of Markarian 501 in May 2009
topic_facet BL Lacertae objects: individual: Mrk 501
Gamma rays: galaxies
Polarization
BL Lacertae objects
Crab nebula
Gamma rays: galaxies
Multi-wavelength campaigns
Polarization angle
Quiescent state
Spectral variability
Very high energies
Gamma rays
description The very high energy (VHE; E> 100 GeV) blazar Markarian 501 was observed between April 17 and May 5 (MJD 54 938-54 956), 2009, as part of an extensive multi-wavelength campaign from radio to VHE. Strong VHE γ-ray activity was detected on May 1st with Whipple and VERITAS, when the flux (E > 400 GeV) increased to 10 times the pre-flare baseline flux (3.9 × 10-11 ph cm-2 s-1), reaching five times the flux of the Crab Nebula. This coincided with a decrease in the optical polarization and a rotation of the polarization angle by 15°. This VHE flare showed a fast flux variation with an increase of a factor ∼4 in 25 min, and a falling time of ∼50 min. We present the observations of the quiescent state previous to the flare and of the high state after the flare, focusing on the flux and spectral variability from Whipple, VERITAS, Fermi-LAT, RXTE, and Swift combined with optical and radio data. © 2016 ESO.
format JOUR
author Aliu, E.
author_facet Aliu, E.
author_sort Aliu, E.
title Very high energy outburst of Markarian 501 in May 2009
title_short Very high energy outburst of Markarian 501 in May 2009
title_full Very high energy outburst of Markarian 501 in May 2009
title_fullStr Very high energy outburst of Markarian 501 in May 2009
title_full_unstemmed Very high energy outburst of Markarian 501 in May 2009
title_sort very high energy outburst of markarian 501 in may 2009
url http://hdl.handle.net/20.500.12110/paper_00046361_v594_n_p_Aliu
work_keys_str_mv AT aliue veryhighenergyoutburstofmarkarian501inmay2009
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