BAT trigger 700791 (the possible GRB 160622A) is 2E 1613.5-5053, the central source in SNR RCW103

ATel #9180; A. D'Ai(INAF-IASFPA), P. A. 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)
on 22 Jun 2016; 14:49 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Phil Evans (pae9@star.le.ac.uk)

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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 Circ. 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) × 10²¹ cm^-2, and a photon index of 2.2 (± 0.4). This is substantially above the 3XMM count rate of 2.567 (±0.020) × 10^-12 erg cm^-2 s^-1.

Observations and analysis are ongoing.

An image of the XRT PC mode data is available at http://www.swift.ac.uk/RCW103.png

XRT Image of the field of BAT trigger 700791