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

Journal Article · · Astronomy and Astrophysics
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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. Here, 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 also oused 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). Furthermore, there were no significant short-term variability 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.
Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Contributing Organization:
Fermi LAT Collaboration; The MAGIC Collaboration
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1356531
Journal Information:
Astronomy and Astrophysics, Journal Name: Astronomy and Astrophysics Vol. 563; ISSN 0004-6361
Publisher:
EDP SciencesCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (7)

GeV-TeV γ $\gamma $ -ray energy spectral break of BL Lac objects journal August 2018
Long-term optical monitoring of TeV emitting blazars: I. Data analysis⋆ journal December 2018
FIRST-EPOCH VLBA IMAGING OF 20 NEW TeV BLAZARS journal November 2014
Investigating the peculiar emission from the new VHE gamma-ray source H1722+119 journal March 2016
Investigating the peculiar emission from the new VHE gamma-ray source H1722+119 text January 2016
Multi-color Optical Monitoring of 10 Blazars from 2005 to 2011 journal August 2018
Investigating the peculiar emission from the new VHE gamma-ray source H1722+119 text January 2016

Figures / Tables (7)

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Table 2(p. 4)table Table 2
Figure 4(p. 5)figure Figure 4
Figure 5(p. 5)figure Figure 5
Table 1(p. 5)table Table 1

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BL lacertae objects: individual: 1ES 1727+502
galaxies: active