TeV and multi-wavelength observations of Mrk421 in 2006-2008

We report on TeV γ-ray observations of the blazar Mrk421 (redshift of 0.031) with the VERITAS observatory and the Whipple 10 m Cherenkov telescope. The excellent sensitivity of VERITAS allowed us to sample the TeV γ-ray fluxes and energy spectra with unprecedented accuracy where Mrk421 was detected...

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Publicado:	2011
Materias:	BL Lacertae objects: individual (Mrk 421) galaxies: jets galaxies: nuclei gamma rays: galaxies X-rays: galaxies
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v738_n1_p_Acciari http://hdl.handle.net/20.500.12110/paper_0004637X_v738_n1_p_Acciari
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_0004637X_v738_n1_p_Acciari
record_format	dspace
spelling	paper:paper_0004637X_v738_n1_p_Acciari2023-06-08T14:29:02Z TeV and multi-wavelength observations of Mrk421 in 2006-2008 BL Lacertae objects: individual (Mrk 421) galaxies: jets galaxies: nuclei gamma rays: galaxies X-rays: galaxies We report on TeV γ-ray observations of the blazar Mrk421 (redshift of 0.031) with the VERITAS observatory and the Whipple 10 m Cherenkov telescope. The excellent sensitivity of VERITAS allowed us to sample the TeV γ-ray fluxes and energy spectra with unprecedented accuracy where Mrk421 was detected in each of the pointings. A total of 47.3 hr of VERITAS and 96 hr of Whipple 10 m data were acquired between 2006 January and 2008 June. We present the results of a study of the TeV γ-ray energy spectra as a function of time and for different flux levels. On 2008 May 2 and 3, bright TeV γ-ray flares were detected with fluxes reaching the level of 10 Crab. The TeV γ-ray data were complemented with radio, optical, and X-ray observations, with flux variability found in all bands except for the radio wave band. The combination of the Rossi X-ray Timing Explorer and Swift X-ray data reveal spectral hardening with increasing flux levels, often correlated with an increase of the source activity in TeV γ-rays. Contemporaneous spectral energy distributions were generated for 18 nights, each of which are reasonably described by a one-zone synchrotron self-Compton model. © 2011. The American Astronomical Society. All rights reserved. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v738_n1_p_Acciari http://hdl.handle.net/20.500.12110/paper_0004637X_v738_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	BL Lacertae objects: individual (Mrk 421) galaxies: jets galaxies: nuclei gamma rays: galaxies X-rays: galaxies
spellingShingle	BL Lacertae objects: individual (Mrk 421) galaxies: jets galaxies: nuclei gamma rays: galaxies X-rays: galaxies TeV and multi-wavelength observations of Mrk421 in 2006-2008
topic_facet	BL Lacertae objects: individual (Mrk 421) galaxies: jets galaxies: nuclei gamma rays: galaxies X-rays: galaxies
description	We report on TeV γ-ray observations of the blazar Mrk421 (redshift of 0.031) with the VERITAS observatory and the Whipple 10 m Cherenkov telescope. The excellent sensitivity of VERITAS allowed us to sample the TeV γ-ray fluxes and energy spectra with unprecedented accuracy where Mrk421 was detected in each of the pointings. A total of 47.3 hr of VERITAS and 96 hr of Whipple 10 m data were acquired between 2006 January and 2008 June. We present the results of a study of the TeV γ-ray energy spectra as a function of time and for different flux levels. On 2008 May 2 and 3, bright TeV γ-ray flares were detected with fluxes reaching the level of 10 Crab. The TeV γ-ray data were complemented with radio, optical, and X-ray observations, with flux variability found in all bands except for the radio wave band. The combination of the Rossi X-ray Timing Explorer and Swift X-ray data reveal spectral hardening with increasing flux levels, often correlated with an increase of the source activity in TeV γ-rays. Contemporaneous spectral energy distributions were generated for 18 nights, each of which are reasonably described by a one-zone synchrotron self-Compton model. © 2011. The American Astronomical Society. All rights reserved.
title	TeV and multi-wavelength observations of Mrk421 in 2006-2008
title_short	TeV and multi-wavelength observations of Mrk421 in 2006-2008
title_full	TeV and multi-wavelength observations of Mrk421 in 2006-2008
title_fullStr	TeV and multi-wavelength observations of Mrk421 in 2006-2008
title_full_unstemmed	TeV and multi-wavelength observations of Mrk421 in 2006-2008
title_sort	tev and multi-wavelength observations of mrk421 in 2006-2008
publishDate	2011
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v738_n1_p_Acciari http://hdl.handle.net/20.500.12110/paper_0004637X_v738_n1_p_Acciari
_version_	1768541826428436480

TeV and multi-wavelength observations of Mrk421 in 2006-2008

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