GCN CIRCULAR 23517: INTEGRAL observations of the events in the GWTC-1 catalog

V. Savchenko, C. Ferrigno, E. Bozzo, E. Kuulkers, C. Sanchez, S. Mereghetti, J. C. Rodi, A. Bazzano, P. Ubertini, L. Natalucci, J. Chenevez, S. Brandt, R. Diehl, A. von Kienlin, D. Gotz, P. Laurent, L. Hanlon, A. Martin-Carrillo, J. P. Roques, E. JourdainA. Lutovinov, R. Sunyaev

Research output: Other contributionNet publication - Internet publicationResearch

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Recently, LIGO/Virgo announced the catalog of gravitational wave events during the first two observing runs O1 and O2 [GWTC-1, arXiv:1811.12907]: 11 high-confidence and 14 marginal events.
INTEGRAL observations are available for 20 out of the 25 events from the complete GWTC-1 sample, consistent with the INTEGRAL duty cycle of about 85%. In particular, the observations are available for 7 out of 11 (64%) of the high-confidence gravitational wave events and 13 out of 14 (93%) of the marginal ones.
For each of the observed events, INTEGRAL was sensitive to the entire LIGO/Virgo localization region. Our preliminary search did not reveal any new significant impulsive gamma-ray counterparts, setting typical upper limits on the 1-s peak flux ranging from 1e-7 to 1e-6 erg/cm2/s in 75-2000 keV energy range.
Detailed analysis and upper limits will be reported in a forthcoming paper.
Original languageEnglish
Publication date7 Dec 2018
Number of pages1
Publication statusPublished - 7 Dec 2018

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