{ "id": "1908.11836", "version": "v1", "published": "2019-08-30T16:54:32.000Z", "updated": "2019-08-30T16:54:32.000Z", "title": "VERITAS Observations of 1ES 1218+304 during the 2019 VHE High State", "authors": [ "Stephan O'Brien" ], "comment": "8 pages, 3 figures, Proceedings of the 36th International Cosmic Ray Conference", "journal": "2019ICRC...36..755B", "categories": [ "astro-ph.HE" ], "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.", "revisions": [ { "version": "v1", "updated": "2019-08-30T16:54:32.000Z" } ], "analyses": { "keywords": [ "veritas observations", "vhe high state", "veritas gamma-ray observatories", "long-term blazar monitoring program", "elevated vhe flux state" ], "tags": [ "conference paper", "journal article" ], "note": { "typesetting": "TeX", "pages": 8, "language": "en", "license": "arXiv", "status": "editable" } } }