Skip to main content
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 19063

GRB 160223B: Swift-XRT observations
2016-02-23T21:18:36Z (8 years ago)
Andy Beardmore at U Leicester <>
T.G.R. Roegiers (PSU), L.M. McCauley (PSU), J.A. Kennea (PSU), S.L.
Gibson (U. Leicester), J.P. Osborne (U. Leicester), K.L. Page (U.
Leicester), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), A. D'Ai
(INAF-IASFPA) and P.A. Evans (U. Leicester) report on behalf of the
Swift-XRT team:

Swift-XRT has performed follow-up observations of the INTEGRAL-detected
burst GRB 160223B (Gotz et al. GCN Circ. 19059), collecting 2.3 ks of
Photon Counting (PC) mode data between T0+10.6 ks and T0+16.4 ks. 

No X-ray sources have been detected inside or close to the INTEGRAL
error region. The 3-sigma upper limit in the field ranges from ~0.004
to ~0.005 ct s^-1, corresponding to a 0.3-10 keV observed flux of
1.8e-13 to 1.9e-13 erg cm^-2 s^-1 (assuming a typical GRB spectrum).

The results of the XRT-team automatic analysis of the XRT observations,
including a position-specific upper limit calculator, are available at

This circular is an official product of the Swift-XRT team.
Looking for U.S. government information and services? Visit