[vsnet-grb-info 23843] GRB 191001A: Swift-XRT observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  25942
SUBJECT: GRB 191001A: Swift-XRT observations
DATE:    19/10/03 20:26:43 GMT
FROM:    Antonino D'Ai at IASF-PA  <antonino.dai at inaf.it>

D.N. Burrows (PSU), J. D. Gropp (PSU), A. Tohuvavohu (U. Toronto), K.L.
Page (U. Leicester), A.P. Beardmore (U. Leicester), P. D'Avanzo
(INAF-OAB), M.G. Bernardini (INAF-OAB), E. Ambrosi  (INAF-IASFPA)  and
P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team:

Swift-XRT has performed follow-up observations of the Fermi/GBM
detected burst GRB 191001A (GCN Circ. 25893, 25894), collecting 5.2 ks
of Photon Counting (PC) mode data between T0+114.2 ks and T0+161.3 ks.

No X-ray sources have been detected consistent with being within 2.0
arcsec	of the likely associated optical transient AT2019rog (GCN Circ.
25911, 25918, 25919 and Tonry et al., TNSTR 1954). The 3-sigma upper
limit in the field ranges from ~0.002 to ~0.003 ct s^-1, corresponding
to a 0.3-10 keV observed flux of 8.6e-14 to 1.0e-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
https://www.swift.ac.uk/ToO_GRBs/00020949.

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