GCN Circular 19548
Subject
BAT trigger 700791 (possible GRB 160622A) is SNR RCW 103
Date
2016-06-22T14:20:36Z (9 years ago)
From
Phil Evans at U of Leicester <pae9@leicester.ac.uk>
A. D'Ai(INAF-IASFPA), P.Evans (U. Leicester), N. Gehrels (NASA/GSFC), C.
Gronwall (PSU), J. A. Kennea (PSU), A. Y. Lien (GSFC/UMBC), F. E.
Marshall (NASA/GSFC), A. Maselli (INAF-IASFPA), T. Sakamoto (AGU) and M.
H. Siegel (PSU) report on behalf of the Swift Team:
Swift has gathered 5.8 ks of WT mode data and 463 s of PC mode data on
the field of the BAT trigger 700791 (= possible GRB 160622A, GCN 19547).
The XRT image is dominated by diffuse emission from the supernova
remnant RCW 103 (Frank et al., ApJ, 2015, 810,113), with a bright
central source at RA,Dec. = 244.40282, -51.03916, which is equivalent to:
RA (J2000.0) = 16h 17m 36.68s
Dec (J2000.0) = -51d 02' 21.0"
with an uncertainty of 3.5" (radius, 90% confidence). This is consistent
with the catalogued X-ray source 3XMM J161736.1-510224. Analysis is
complicated by the presence of the diffuse emission from the SNR,
however the source count rate is ~2 ct/sec, with a flux of approximately
9.1 (+2.0, -1.6) �� 10^-11 erg cm^-2 s^-1 (derived from a power-law
spectrum with NH=7.0 (+3.6, -2.5)e21 cm^-2, and a photon index of 2.2
(+/- 0.4). This is substantially above the 3XMM count rate of 2.567 (+/-
0.020)e-12 erg cm^-2 s^-1.
Observations and analysis are ongoing.
This circular is an official product of the Swift XRT team.
[GCN OPS NOTE(22jun16): Per author's request, A.D'A's name was corrected,
and the missing minus sign for the sexagesimal form of the Dec value
was added.]