TITLE:   GCN CIRCULAR
NUMBER:  19538
SUBJECT: GRB 160612A: Swift-XRT observations
DATE:    16/06/15 12:24:55 GMT
FROM:    Beatriz Mingo at U of Leicester,XRT  <bm188@le.ac.uk>

L.M. McCauley (PSU), K.L. Page (U. Leicester), B. Mingo (U. Leicester),
A.P. Beardmore (U. Leicester), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA),
A. Maselli  (INAF-IASFPA), J.A. Kennea (PSU), B. Sbarufatti
(INAF-OAB/PSU) and P.A. Evans (U. Leicester), S. R. Oates (U. Warwick)
report on behalf of the Swift-XRT and UVOT teams:

Swift-XRT has performed follow-up observations of the
Swift/BAT-detected burst GRB 160612A (Lien et al. GCN Circ. 19537),
collecting 985 s of Photon Counting (PC) mode data between T0+178.4 ks
and T0+179.4 ks. 

No X-ray sources have been detected inside or close to the Swift/BAT
error region. The 3-sigma upper limit in the field is 0.008 ct	s^-1,
corresponding to a 0.3-10 keV observed flux of 3.1e-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
http://www.swift.ac.uk/ToO_GRBs/00020665.

The UVOT did not detect an afterglow within the BAT error circle, down
to a magnitude of > 20.87 with an exposure of 978s in the w2 filter.

This circular is an official product of the Swift-XRT and UVOT teams.