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19 April 2024

» arxiv » 1302.6140

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Discovery of very high energy gamma-ray emission from the blazar 1ES 1727+502 with the MAGIC Telescopes
MAGIC Collaboration ; J. Aleksić ; L. A. Antonelli ; P. Antoranz ; M. Asensio ; M. Backes ; U. Barres de Almeida ; J. A. Barrio ; J. Becerra González ; W. Bednarek ; K. Berger ; E. Bernardini ; A. Biland ; O. Blanch ; R. K. Bock ; A. Boller ; S. Bonnefoy ; G. Bonnoli ; D. Borla Tridon ; F. Borracci ; T. Bretz ; E. Carmona ; A. Carosi ; D. Carreto Fidalgo ; P. Colin ; E. Colombo ; J. L. Contreras ; J. Cortina ; L. Cossio ; S. Covino ; P. Da Vela ; F. Dazzi ; A. De Angelis ; G. De Caneva ; B. De Lotto ; C. Delgado Mendez ; M. Doert ; A. Domínguez ; D. Dominis Prester ; D. Dorner ; M. Doro ; D. Eisenacher ; D. Elsaesser ; E. Farina ; D. Ferenc ; M. V. Fonseca ; L. Font ; C. Fruck ; R. J. García López ; M. Garczarczyk ; D. Garrido Terrats ; M. Gaug ; G. Giavitto ; N. Godinović ; A. González Muñoz ; S. R. Gozzini ; A. Hadamek ; D. Hadasch ; D. Häfner ; A. Herrero ; J. Hose ; D. Hrupec ; W. Idec ; F. Jankowski ; V. Kadenius ; S. Klepser ; M. L. Knoetig ; T. Krähenbühl ; J. Krause ; J. Kushida ; A. La Barbera ; D. Lelas ; N. Lewandowska ; E. Lindfors ; S. Lombardi ; M. López ; R. López-Coto ; A. López-Oramas ; E. Lorenz ; I. Lozano ; M. Makariev ; K. Mallot ; G. Maneva ; N. Mankuzhiyil ; K. Mannheim ; L. Maraschi ; B. Marcote ; M. Mariotti ; M. Martínez ; J. Masbou ; D. Mazin ; M. Meucci ; J. M. Miranda ; R. Mirzoyan ; J. Moldón ; A. Moralejo ; P. Munar-Adrover ; D. Nakajima ; A. Niedzwiecki ; K. Nilsson ; N. Nowak ; R. Orito ; S. Paiano ; M. Palatiello ; D. Paneque ; R. Paoletti ; J. M. Paredes ; S. Partini ; M. Persic ; F. Prada ; P. G. Prada Moroni ; E. Prandini ; I. Puljak ; I. Reichardt ; R. Reinthal ; W. Rhode ; M. Ribó ; J. Rico ; S. Rügamer ; A. Saggion ; K. Saito ; T. Y. Saito ; M. Salvati ; K. Satalecka ; V. Scalzotto ; V. Scapin ; C. Schultz ; T. Schweizer ; S. N. Shore ; A. Sillanpää ; J. Sitarek ; I. Snidaric ; D. Sobczynska ; F. Spanier ; S. Spiro ; V. Stamatescu ; A. Stamerra ; B. Steinke ; J. Storz ; S. Sun ; T. Surić ; L. Takalo ; H. Takami ; F. Tavecchio ; P. Temnikov ; T. Terzić ; D. Tescaro ; M. Teshima ; O. Tibolla ; D. F. Torres ; T. Toyama ; A. Treves ; M. Uellenbeck ; P. Vogler ; R. M. Wagner ; Q. Weitzel ; F. Zandanel ; R. Zanin ;
Date:	25 Feb 2013
Abstract:	Motivated by the Costamante & Ghisellini (2002) predictions we investigated if the blazar 1ES 1727+502 (z=0.055) is emitting very high energy (VHE, E>100 GeV) gamma rays. We observed the BL Lac object 1ES 1727+502 in stereoscopic mode with the two MAGIC telescopes during 14 nights between May 6th and June 10th 2011, for a total effective observing time of 12.6 hours. For the study of the multiwavelength spectral energy distribution (SED) we use simultaneous optical R-band data from the KVA telescope, archival UV/optical and X-ray observations by instruments UVOT and XRT on board of the Swift satellite and high energy (HE, 0.1 GeV - 100 GeV) gamma-ray data from the Fermi-LAT instrument. We detect, for the first time, VHE gamma-ray emission from 1ES 1727+502 at a statistical significance of 5.5 sigma. The integral flux above 150 GeV is estimated to be (2.1pm0.4)% of the Crab Nebula flux and the de-absorbed VHE spectrum has a photon index of (2.7pm0.5). No significant short-term variability was found in any of the wavebands presented here. We model the SED using a one-zone synchrotron self-Compton model obtaining parameters typical for this class of sources.
Source:	arXiv, 1302.6140
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