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ANTARES neutrino detection: INTEGRAL upper limit on the hard X-ray counterpart

ATel #7995; C. Ferrigno Y. Wang (ISDC-University of Geneva, Switzerland), E. Kuulkers, G. Belanger (ESAC/ESA, Spain), A. Bodaghee (GCSU, USA), J. Wilms (Remeis/ECAP/FAU, Germany)
on 4 Sep 2015; 20:51 UT
Credential Certification: Carlo Ferrigno (Carlo.Ferrigno@unige.ch)

Subjects: X-ray, Transient

Referred to by ATel #: 8027, 8124

INTEGRAL serendipitously pointed at the arrival direction of a neutrino detected by the ANTARES experiment, for which Swift/XRT found a possible X-ray counterpart (ATEL #7987 #7992 #7993 # 7994 GCN #18240).

The observing window starts nine hours after the neutrino event (from 2015-09-01 16:37 to 2015-09-02 12:07 UT) and no significant source is detected in the ANTARES 50% containment radius. Using the available 1.2 ks equivalent on-axis exposure with the IBIS/ISGRI instrument, we obtain a 3σ upper limit at the location of the Swift/XRT putative counterpart of 8 mCrab in the 20-80 keV energy band, corresponding to 1.8 ×10-10 erg/s/cm2.