Journal Article PUBDB-2016-00370

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The 2012 Flare of PG 1553+113 Seen with H.E.S.S. and Fermi -Lat

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2015
Univ.11032 Chicago, Ill. [u.a.]

The astrophysical journal / 1 802(1), 65 - () [10.1088/0004-637X/802/1/65]
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Abstract: Very high energy (VHE, E > 100 GeV) $\gamma-ray$ flaring activity of the high-frequency peaked BL Lac object PG 1553+113 has been detected by the H.E.S.S. telescopes. The flux of the source increased by a factor of 3 during the nights of 2012 April 26 and 27 with respect to the archival measurements with a hint of intra-night variability. No counterpart of this event has been detected in the Fermi-Large Area Telescope data. This pattern is consistent with VHE $\gamma-ray$ flaring being caused by the injection of ultrarelativistic particles, emitting $\gamma-rays$ at the highest energies. The dataset offers a unique opportunity to constrain the redshift of this source at z = 0.49 $\pm$ 0.04 using a novel method based on Bayesian statistics. The indication of intra-night variability is used to introduce a novel method to probe for a possible Lorentz invariance violation (LIV), and to set limits on the energy scale at which Quantum Gravity (QG) effects causing LIV may arise. For the subluminal case, the derived limits are $E_{QG,1}$ > 4.10 × $10^{17}$ GeV and $E_{QG,2}$ > 2.10 × $10^{10}$ GeV for linear and quadratic LIV effects, respectively.

Classification:

Note: (c) The American Astronomical Society

Contributing Institute(s):
  1. High Energy Steroscopic System (ZEU-HESS)
Research Program(s):
  1. 613 - Matter and Radiation from the Universe (POF3-613) (POF3-613)
  2. P-WIND - New light on the gamma-ray sky: unveiling cosmic-ray accelerators in the Milky Way and their relation to pulsar wind nebulae (259391) (259391)
Experiment(s):
  1. Measurement at external facility

Appears in the scientific report 2015
Database coverage:
Medline ; OpenAccess ; Current Contents - Physical, Chemical and Earth Sciences ; Free to read ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection
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 Record created 2016-01-15, last modified 2025-07-30


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