Downloads provided by UsageCountsMAGIC TeV gamma-ray observations of Markarian 421 during multiwavelength campaigns in 2006
Copyright policy )MZOS| Photon-atom interaction and correlations
Miguel A. Pérez-Torres; Diego F. Torres; Diego F. Torres; Pol Bordas; R. J. García López; Antonio Stamerra; S. Spiro; +146 Authors
Miguel A. Pérez-Torres; Diego F. Torres; Diego F. Torres; Pol Bordas; R. J. García López; Antonio Stamerra; S. Spiro; E. Lorenz; E. Lorenz; Pierre Colin; A. Sillanpää; D. Hildebrand; Markus Garczarczyk; Michele Doro; Ilana M. Braun; M. V. Fonseca; J. C. Struebig; Takashi Saito; R. K. Bock; R. K. Bock; Manel Errando; Victor Zabalza; D. Bose; M. I. Martínez; A. Laille; Abelardo Moralejo; M. Rissi; Reiko Orito; J. Hose; Fabio Zandanel; Stefano Covino; M. Camara; Giacomo Bonnoli; Laura Maraschi; Juan Cortina; B. Steinke; Ignasi Reichardt; Saverio Lombardi; Daniela Dorner; S. Balestra; R. G. Pegna; Aaron Dominguez; Hiroko Miyamoto; Elisa Bernardini; Thomas Bretz; Markus Gaug; Tomislav Terzić; Nijil Mankuzhiyil; A. Saggion; D. Elsaesser; Francisco Prada; S. Commichau; M. Doert; Robert Wagner; D. Britzger; M. Salvati; Petar Temnikov; M. Pasanen; D. Höhne-Mönch; Masahiro Teshima; Jose Miguel Miranda; Roberta Zanin; Juan Abel Barrio; V. Scapin; D. Borla Tridon; E. Prandini; C. Delgado Mendez; Konstancja Satalecka; Denis Bastieri; S. Paiano; C. Schultz; C. Baixeras; Alessandro Carosi; Francesco Longo; Mosè Mariotti; E. Carmona; D. Dominis Prester; Daniel Kranich; Valentí Bosch-Ramon; D. Pascoli; I. Puljak; Ll. Font; Javier Moldon; A. Herrero; Wolfgang Rhode; J. M. Paredes; L. Peruzzo; Daniel Ferenc; P. Antoranz; Kari Nilsson; D. Hadasch; E. De Cea del Pozo; Jose Luis Contreras; G. Maneva; T. Jogler; T. Krähenbühl; Agnieszka Sierpowska-Bartosik; M. De Maria; Adrian Biland; Julian Sitarek; S. Partini; N. Puchades; F. De Sabata; Jelena Aleksić; K. Berger; E. Leonardo; Michael Backes; Riccardo Paoletti; Wlodek Bednarek; S. Rügamer; V. Scalzotto; D. Tescaro; Marc Ribó; A. La Barbera; Daniel Mazin; L. A. Antonelli; Francesco Dazzi; Francesco Dazzi; Mario Meucci; M. T. Costado; Stefan Klepser; Dario Hrupec; M. López; Felicitas Pauss; Mariano Moles; Massimo Persic; Massimo Persic; Tihomir Surić; Pratik Majumdar; T. Schweizer; Fabrizio Tavecchio; Jelena Ninkovic; Daniel Nieto; B. De Lotto; Andrei Berdyugin; S. N. Shore; Nikola Godinovic; R. Mirzoyan; A. De Angelis; Karl Mannheim; J. Becerra González; R. de los Reyes; C. C. Hsu; Elina Lindfors; Felix Spanier; Dorota Sobczyńska; H. Vankov; L. O. Takalo; M. Shayduk; J. Rico; J. Rico; Igor Oya; Miguel A. Sánchez-Conde;
MAGIC TeV gamma-ray observations of Markarian 421 during multiwavelength campaigns in 2006
The Major Atmospheric Gamma Imaging Cerenkov (MAGIC) telescope participated in three multiwavelength (MWL) campaigns, observing the blazar Markarian (Mkn) 421 during the nights of 2006 April 28, 29, and 2006 June 14. We analyzed the corresponding MAGIC very-high energy observations during 9 nights from 2006 April 22 to 30 and on 2006 June 14. We inferred light curves with sub-day resolution and night-by-night energy spectra. A strong gamma-ray signal was detected from Mkn 421 on all observation nights. The flux (E > 250 GeV) varied on night-by-night basis between (0.92+-0.11)10^-10 cm^-2 s^-1 (0.57 Crab units) and (3.21+-0.15)10^-10 cm^-2 s^-1 (2.0 Crab units) in 2006 April. There is a clear indication for intra-night variability with a doubling time of 36+-10(stat) minutes on the night of 2006 April 29, establishing once more rapid flux variability for this object. For all individual nights gamma-ray spectra could be inferred, with power-law indices ranging from 1.66 to 2.47. We did not find statistically significant correlations between the spectral index and the flux state for individual nights. During the June 2006 campaign, a flux substantially lower than the one measured by the Whipple 10-m telescope four days later was found. Using a log-parabolic power law fit we deduced for some data sets the location of the spectral peak in the very-high energy regime. Our results confirm the indications of rising peak energy with increasing flux, as expected in leptonic acceleration models.
11 pages, 7 figures, accepted for publication by Astron. Astrophys
- ETH Zurich Switzerland
- University of Padua Italy
- Institute for High Energy Physics Spain
- Max Planck Society Germany
- Spanish National Research Council Spain
galaxies [Gamma rays], PARTICLE-ACCELERATION, Correlated Variability, Active Galaxy Markarian-421, Radiation mechanisms: non-thermal, Crab-Nebula, Electrónica (Física), 2202.03 Electricidad, Raigs gamma, ACTIVE GALAXY MARKARIAN-421, Jets (Astrofísica), Palma (Canary Islands), BL Lacertae objects: individual: Mkn 421, Spectra., Palma (Canàries), Very High Energy Gamma-ray Astronomy; MAGIC telescope; Active Galactic Nuclei, Physics, Blazar Markarian-421, CORRELATED VARIABILITY, Gamma rays: galaxies, Particle-Acceleration, Electrónica, Física nuclear, Electricidad, Telescopis espacials, Astrophysics - Cosmology and Nongalactic Astrophysics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), gamma ray astronomy; IMAGING CHERENKOV DETECTOR, 539.1, gamma rays: observations; BL Lacertae objects: individual (Mkn 421); Radiation mechanisms: non-thermal, BLAZAR MARKARIAN-421, FOS: Physical sciences, Space telescopes, Atmospheric Cherenkov Telescope, BL-LAC OBJECTS, 537, SPECTRA, Nucli galàctic actiu, individual: Mkn 421 [BL Lacertae objects], ATMOSPHERIC CHERENKOV TELESCOPE; ACTIVE GALAXY MARKARIAN-421; HIGH-ENERGY PHOTONS; BL-LAC OBJECTS; X-RAY; CORRELATED VARIABILITY; PARTICLE-ACCELERATION; BLAZAR MARKARIAN-421; CRAB-NEBULA; SPECTRA, Active galactic nuclei, ATMOSPHERIC CHERENKOV TELESCOPE, non-thermal [Radiation mechanisms], Gamma rays, Astronomy and Astrophysics, Active Galactic Nuclei, 2207 Física Atómica y Nuclear, Galaxies, BL Lacertae objects: individual (Mkn 421), HIGH-ENERGY PHOTONS, Galàxies, Astrophysical jets, CRAB-NEBULA, MAGIC telescope, Very High Energy Gamma-ray Astronomy, X-RAY, High-Energy Photons, X-Ray, BL-LAC Objectc, gamma rays: observations
galaxies [Gamma rays], PARTICLE-ACCELERATION, Correlated Variability, Active Galaxy Markarian-421, Radiation mechanisms: non-thermal, Crab-Nebula, Electrónica (Física), 2202.03 Electricidad, Raigs gamma, ACTIVE GALAXY MARKARIAN-421, Jets (Astrofísica), Palma (Canary Islands), BL Lacertae objects: individual: Mkn 421, Spectra., Palma (Canàries), Very High Energy Gamma-ray Astronomy; MAGIC telescope; Active Galactic Nuclei, Physics, Blazar Markarian-421, CORRELATED VARIABILITY, Gamma rays: galaxies, Particle-Acceleration, Electrónica, Física nuclear, Electricidad, Telescopis espacials, Astrophysics - Cosmology and Nongalactic Astrophysics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), gamma ray astronomy; IMAGING CHERENKOV DETECTOR, 539.1, gamma rays: observations; BL Lacertae objects: individual (Mkn 421); Radiation mechanisms: non-thermal, BLAZAR MARKARIAN-421, FOS: Physical sciences, Space telescopes, Atmospheric Cherenkov Telescope, BL-LAC OBJECTS, 537, SPECTRA, Nucli galàctic actiu, individual: Mkn 421 [BL Lacertae objects], ATMOSPHERIC CHERENKOV TELESCOPE; ACTIVE GALAXY MARKARIAN-421; HIGH-ENERGY PHOTONS; BL-LAC OBJECTS; X-RAY; CORRELATED VARIABILITY; PARTICLE-ACCELERATION; BLAZAR MARKARIAN-421; CRAB-NEBULA; SPECTRA, Active galactic nuclei, ATMOSPHERIC CHERENKOV TELESCOPE, non-thermal [Radiation mechanisms], Gamma rays, Astronomy and Astrophysics, Active Galactic Nuclei, 2207 Física Atómica y Nuclear, Galaxies, BL Lacertae objects: individual (Mkn 421), HIGH-ENERGY PHOTONS, Galàxies, Astrophysical jets, CRAB-NEBULA, MAGIC telescope, Very High Energy Gamma-ray Astronomy, X-RAY, High-Energy Photons, X-Ray, BL-LAC Objectc, gamma rays: observations
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).34 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Top 10% influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Top 10% impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Top 10% views 191 downloads 162 - 191views162downloads
citations
Citations provided by BIP!
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
Citations provided by BIP!popularityPopularity provided by BIP!
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
Popularity provided by BIP!influenceInfluence provided by BIP!
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
Influence provided by BIP!impulseImpulse provided by BIP!
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
Impulse provided by BIP!viewsViews provided by UsageCounts
Views provided by UsageCountsdownloadsDownloads provided by UsageCounts
Downloads provided by UsageCounts 34
Top 10%
Top 10%
Top 10%
191
162
Green
bronze
Beta
Fields of Science
Related to Research communities
EGI : advanced computing for research