TITLE:   GCN CIRCULAR
NUMBER:  25279
SUBJECT: GRB 190805B: Swift-XRT observations
DATE:    19/08/06 05:24:47 GMT
FROM:    Kim Page at U.of Leicester  <klp5@leicester.ac.uk>

M. Perri (ASDC), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA), J.A. Kennea
(PSU), B. Sbarufatti (PSU), D.N. Burrows (PSU), K.L. Page (U.
Leicester), A.P. Beardmore (U. Leicester) and P.A. Evans (U. Leicester)
report on behalf of the Swift-XRT team:

Swift-XRT has performed follow-up observations of the MAXI-detected
burst GRB 190805B (Sato et al. GCN Circ. 25271) in a series of
observations tiled on the sky. The total exposure time is 1.3 ks,
distributed over 7 tiles; the maximum exposure at a single sky location
was 391 s. The data were collected between T0+47.6 ks and T0+49.0 ks,
and are entirely in Photon Counting (PC) mode. 

No X-ray sources have been detected. The 3-sigma upper limit in the
field (not including the regions where the tiles overlap) ranges from
~0.03 to ~0.11 ct s^-1, corresponding to a 0.3-10 keV observed flux of
1.2e-12 to 4.4e-12 erg cm^-2 s^-1 (assuming a typical GRB spectrum).

The results of the XRT-team automatic analysis of the tiled XRT
observations, including a position-specific upper limit calculator, are
available at https://www.swift.ac.uk/xrt_products/TILED_GRB00083.

This circular is an official product of the Swift-XRT team.