TITLE:   GCN CIRCULAR
NUMBER:  38579
SUBJECT: GRB 241212A: Swift-XRT observations
DATE:    24/12/16 06:42:41 GMT
FROM:    Phil Evans at U of Leicester <pae9@star.le.ac.uk>

M. Perri (SSDC & INAF-OAR), V. D'Elia (SSDC & INAF-OAR), B. Sbarufatti
(INAF-OAB), D.N. Burrows (PSU), M. A. Williams (PSU), S. Dichiara
(PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester) and P.A.
Evans (U. Leicester) reports on behalf of the Swift-XRT team:

Swift-XRT has performed follow-up observations of the
SVOM/ECLAIRs-detected burst GRB 241212A, collecting  2.3 ks of Photon
Counting (PC) mode data between T0+257.0 ks and T0+297.7 ks. 

No X-ray sources have been detected within the estimated 3-sigma
SVOM/ECLAIRs error region (118 arcsec). The 3-sigma upper limit in the
field is 0.004 ct  s^-1, corresponding to a 0.3-10 keV observed flux of
1.4e-13 erg cm^-2 s^-1 (assuming a typical GRB spectrum).

An uncatalogued was detected, however this was too far from the GRB
position to be the afterglow.

The results of the XRT-team automatic analysis of the XRT observations,
including a position-specific upper limit calculator, are available at
https://www.swift.ac.uk/ToO_GRBs/00021740.

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