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Discovery of very high energy gamma-ray emission from the blazar 1ES 1727+502 with the MAGIC Telescopes
MAGIC Collaboration; Marcote Martin, Benito; Moldón Vara, Francisco Javier; Munar i Adrover, Pere; Paredes i Poy, Josep Maria; Ribó Gomis, Marc; Zanin, Roberta
Universitat de Barcelona
Motivated by the prediction of a high TeV luminosity we investigated whether the blazar 1ES 1727+502 (z = 0.055) is emitting very high energy (VHE, E > 100 GeV) γ rays. We observed the BL Lac object 1ES 1727+502 in stereoscopic mode with the two MAGIC telescopes for 14 nights between May 6th and June 10th 2011, for a total effective observing time of 12.6 h. To study the multiwavelength spectral energy distribution (SED), we used simultaneous optical R-band data from the KVA telescope, archival UV/optical and X-ray observations from instruments UVOT and XRT on board of the Swift satellite, and high energy (HE, 0.1 GeV-100 GeV) γ-ray data from the Fermi-LAT instrument. We detected, for the first time, VHE γ-ray emission from 1ES 1727+502 at a statistical significance of 5.5σ. The integral flux above 150 GeV is estimated to be (2.1 ± 0.4)% of the Crab nebula flux and the de-absorbed VHE spectrum has a photon index of (2.7 ± 0.5). 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.
Galàxies
Raigs gamma
Telescopis
Nucli galàctic actiu
Astrofísica
Galaxies
Gamma rays
Telescopes
Active galactic nuclei
Astrophysics
(c) Springer Verlag, 2014
Article
info:eu-repo/semantics/acceptedVersion
Springer Verlag
         

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