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GCN Circular 20564

GRB 170127C: Swift-XRT observations
2017-01-29T12:05:26Z (7 years ago)
Valerio D'Elia at ASDC <>
V. D�Elia (ASDC) reports on behalf of the Swift-XRT team:

Swift-XRT has performed follow-up observations of the Fermi/LAT-detected burst GRB 170127C (Bissaldi et al., GCN Circ 20543, Moretti et al., GCN Circ 20544)  in a series of observations tiled on the sky. The total exposure time is 5 ks, distributed over 7 tiles; the maximum exposure at a single sky location was 1.4 ks. The data were collected between T0+61.2 and T0+77.4 ks and are entirely in Photon Counting (PC) mode. 

No new source is detected in the XRT field of view, at a count rate limit in the range 0.005-0.01 cts/s.

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

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