GCN CIRCULAR 21507, LIGO/Virgo G298048: INTEGRAL detection of a prompt gamma-ray counterpart

V. Savchenko, S. Mereghetti, C. Ferrigno, E. Kuulkers, A. Bazzano, E. Bozzo, T. J.L. Courvoisier, S. Brandt, R. Diehl, L. Hanlon, P. Laurent, A. Lutovinov, J.P. Roques, R. Sunyaev, P. Ubertini

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Abstract

We investigated serendipitous INTEGRAL observations carried out at thetime of the LIGO/Virgo burst candidate G298048. The satellite was covering a fraction of the probability of the LIGO-Virgo localization. The best sensitivity depends on the source location. We investigated the SPI-ACS light curves between -30 and +30 s from the trigger time (2017-08-17 12:41:04 UTC, T0) on temporal scales from 0.1 to 100s. In the SPI-ACS data, we detect a short and relatively weak transient with S/N of at T0, with an S/N larger than 3. coincident with the GBM trigger (Connaughton 2017, GCN 21506). Further analysis is ongoing, and will be reported in the coming circulars.
Original languageEnglish
Publication date17 Aug 2017
Publication statusPublished - 17 Aug 2017

Bibliographical note

Senest ændret: 17/08/2017

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