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Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - GRI - Gamma Ray Indirect
VERITAS Observations of 1ES 1218+304 during the 2019 VHE High State
S. O Brien
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Pre-published on: 2019 July 22
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Abstract
1ES 1218+304 is a moderate-redshift (z = 0.182) high-frequency-peaked BL Lac object (HBL). Detected by both the MAGIC and VERITAS gamma-ray observatories, 1ES 1218+304 is frequently monitored by VERITAS as part of its long-term blazar monitoring program. On the 3rd of January 2019, during a regularly scheduled blazar snapshot, VERITAS observed 1ES 1218+304 to have an elevated VHE flux state which continued through January 5 (ATEL #12360). In addition to VERITAS observations, MAGIC also detected elevated VHE emission (ATEL #12354) and Swift-BAT/XRT and Tuorla observations, in X-ray and optical respectively, showed increased multiwavelength activity at the time of the VERITAS observations. In this work, VERITAS observations of 1ES 1218+304 taken as part of a target of opportunity campaign during this elevated state, are presented.
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