PoS - Proceedings of Science
Volume 444 - 38th International Cosmic Ray Conference (ICRC2023) - Gamma-ray Astronomy (GA)
Multi-wavelength Observations of a Long-duration Flare from BL Lacertae
C.E. Hinrichs*, A. Acharyya and A.C. Sadun
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Pre-published on: August 17, 2023
Published on:
Abstract
The Very Energetic Radiation Imaging Telescope Array System (VERITAS) is one of the world’s most sensitive very-high-energy (VHE; E > 100 GeV) gamma-ray observatories. VERITAS is used to regularly monitor the VHE flux of selected intermediate-frequency-peaked BL Lac objects (IBLs). IBLs are typically only detected at VHE during flaring episodes, and their VHE emission mechanisms may differ from those of high-frequency-peaked BL Lac objects more commonly detected at VHE. In October-November 2022, VERITAS observed a long duration (≈ 45 days) VHE flare from BL Lacertae for the first time. The initial detection of this flare triggered a multi-wavelength observation campaign on the source. Scientific results from these multi-wavelength observations of this BL Lacertae flaring event will be presented.
DOI: https://doi.org/10.22323/1.444.0747
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