Journal Article/Internal Report DESY-2014-00625

Discovery of very high energy gamma-ray emission from the blazar 1ES 1727+502 with the MAGIC Telescopes

(Corresponding Author) ; ; ; ; ; ; ; ; ; ; DESY* ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; DESY* ; ; ; DESY* ; ; ; ; ; ; ; ; ; ; ; ; ; DESY* ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; DESY* ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; DESY* ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; (Collaboration Author)

2014
EDP Sciences Les Ulis

Please use a persistent id in citations: doi:

Report No.: arXiv:1302.6140;

Abstract: 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.

Classification:

Note: 7 pages, 5 figures, 2 tables, submitted to A&A

Contributing Institute(s):
  1. Astroteilchenphysik (ZEU-EXP/AT)
Research Program(s):
  1. 523 - High-energy gamma ray astronomy (POF2-523) (POF2-523)
Experiment(s):
  1. No specific instrument

Appears in the scientific report 2014
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Discovery of very high energy gamma-ray emission from the blazar 1ES 1727+502 with the MAGIC Telescopes
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 Record created 2014-01-16, last modified 2017-06-02


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