Difference: GCNCIRCULAR21658 ( vs. 1)

V. Savchenko (ISDC, University of Geneva, CH) on behalf of the INTEGRAL group: S. Mereghetti (IASF-Milano, Italy), C. Ferrigno ((ISDC, University of Geneva, CH), E. Kuulkers (ESTEC/ESA, The Netherlands), A. Bazzano (IAPS-Roma, Italy), E. Bozzo, T. J.-L. Courvoisier (ISDC, University of Geneva, CH) S. Brandt (DTU - Denmark) R. Diehl (MPE-Garching, Germany) L. Hanlon (UCD, Ireland) P. Laurent (APC, Saclay/CEA, France) A. Lutovinov (IKI, Russia) J.P. Roques (CESR, France) R. Sunyaev (IKI, Russia) P. Ubertini (IAPS-Roma, Italy)

The INTEGRAL spacecraft has a highly elliptical orbit and the instruments are switched off around the perigee passage, every 2.6 days, to prevent radiation-induced damages. Unfortunately, at the time of the LIGO/Virgo trigger G298936 (2017-08-23 13:13:58 UTC) the spacecraft was preparing to the start the observations after the perigee passage between the orbits number 1853 and 1854 and no scientific instrument data are available before 2017-08-23T13:34:33.565 (~20 minutes after the event).

-- DeepChatterjee - 23 Aug 2017