GCN Circular 34006

P. D'Avanzo (INAF-OAB), M.G. Bernardini (INAF-OAB), D.N. Burrows (PSU),
J. D. Gropp (PSU), S. Dichiara (PSU), A.P. Beardmore (U. Leicester),
J.P. Osborne (U. Leicester), 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 IPN-detected
burst GRB 230616A in a series of observations tiled on the sky. The
total exposure time is 4.6 ks, distributed over 4 tiles; the maximum
exposure at a single sky location was 2.0 ks. The data were collected
between T0+111.3 ks and T0+140.7 ks, and are entirely in Photon
Counting (PC) mode. 

Three uncatalogued X-ray sources have been detected, however none of
them is above the RASS limit or shows definitive signs of fading.
Therefore, at the present time we cannot identify which, if any, is the
afterglow. Details of these sources are given below:

Source 1:
  RA (J2000.0):  192.1005  =  12:48:24.12
  Dec (J2000.0): +5.4365  =  +05:26:11.4
  Error: 8.2 arcsec (radius, 90% conf.)
  Count-rate: 0.0177 [+0.0053, -0.0045] ct s^-1   
  Distance: 1675 arcsec from IPN position.
  Flux: (6.8 [+2.1, -1.7])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)

Source 2:
  RA (J2000.0):  192.2299  =  12:48:55.18
  Dec (J2000.0): +6.0936  =  +06:05:36.9
  Error: 5.1 arcsec (radius, 90% conf. [Enhanced position])
  Count-rate: 0.0125 [+0.0046, -0.0037] ct s^-1   
  Distance: 820 arcsec from IPN position.
  Flux: (4.2 [+1.5, -1.3])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)

Source 3:
  RA (J2000.0):  191.8031  =  12:47:12.74
  Dec (J2000.0): +5.5136  =  +05:30:48.9
  Error: 6.0 arcsec (radius, 90% conf.)
  Count-rate: (5.7 [+3.5, -2.5])e-3 ct s^-1   
  Distance: 1769 arcsec from IPN position.

The results of the XRT-team automatic analysis of the tiled XRT
observations, including a position-specific upper limit calculator, are
available at https://www.swift.ac.uk/xrt_products/TILED_GRB00112.

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