GCN Circular 23472
Subject
GRB 181201A: Swift-XRT afterglow
Date
2018-12-01T12:12:37Z (5 years ago)
From
Sandro Mereghetti at IASF-Milano/INAF <sandro.mereghetti@inaf.it>
F.Pintore, S.Mereghetti (IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno,
E.Bozzo, V.Savchenko (ISDC, Versoix), L.Ducci (IAAT, Germany and ISDC,
Versoix)
and J.Borkowski (CAMK, Torun) report:
Swift/XRT observed the position of GRB181201A on 1 December 2018 from 6:33
UT to 7:06 UT (GCN #23471), in PC mode.
The XRT data show that the X-ray source reported by Mereghetti et al. (GCN
Circ. n. 23471 ) is fading and has an average spectrum well modelled by a
single absorbed powerlaw. The best-fit parameters are: column density of (6
+\- 2)x10^20 cm-2, consistent with the Galactic column density (5.2e20
cm-2, Willingale et al.2013), photon index of 1.76 +\- 0.08. The average
0.3-10 keV absorbed flux is (1.06 +\- 0.06)x10^-10 erg cm-2 s-1.
The time decay is well modeled with a power law of index 1.2 +\- 0.1