[vsnet-grb-info 17385] GRB 151228A: Correction to GCN 18770

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  18772
SUBJECT: GRB 151228A: Correction to GCN 18770
DATE:    15/12/30 13:49:06 GMT
FROM:    Kim Page at U.of Leicester  <klp5 at leicester.ac.uk>

K.L. Page (U. Leicester) reports on behalf of the Swift-XRT team:

We apologise for the incomplete nature of GCN 18770, which was
automatically sent out in error. The correct information is given below:

We have analysed 2.2 ks of XRT data for GRB 151228A (Ukwatta et al., GCN
Circ. 18731), from 178.6 to 196.5 ks after the BAT trigger. The data are
entirely in Photon Counting (PC) mode. No X-ray source is detected in or
near to the BAT refined error circle (Barthelmy et al., GCN Circ. 18754),
to a 3-sigma upper limit of 7x10^-3 count s^-1, corresponding to an
approximate observed flux of 3x10^-13 erg cm^-2 s^-1.

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