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GCN Circular 34639

Subject
GRB 230906A: Swift-XRT observations
Date
2023-09-07T23:22:03Z (9 months ago)
From
Phil Evans at U of Leicester <pae9@star.le.ac.uk>
Via
legacy email
A.P. Beardmore (U. Leicester), B. Sbarufatti (INAF-OAB), A. D'Ai
(INAF-IASFPA), A. Melandri (INAF-OAR), J. D. Gropp (PSU), S. Dichiara
(PSU), J.A. Kennea (PSU), J.P. Osborne (U. Leicester) and P.A. Evans
(U. Leicester) reports on behalf of the Swift-XRT team:

Swift-XRT has performed follow-up observations of the IPN-detected
burst GRB 230906A (Kozyrev et al., GCN Circ 34637), collecting 4.7 ks
of Photon Counting (PC) mode data between T0+93.0 ks and T0+106.0 ks. 

One uncatalogued X-ray source has been detected, it is below the RASS
limit and shows no definitive signs of fading. Therefore, at the
present time we cannot confirm this as the afterglow. Details of this
source are given below:

Source 1:
  RA (J2000.0):  79.7533  =  05:19:0.79
  Dec (J2000.0): -47.8930  =  -47:53:34.9
  Error: 6.4 arcsec (radius, 90% conf.)
  Count-rate: (1.73 [+0.88, -0.67])e-3 ct s^-1	 
  Distance: 23 arcsec from IPN position.

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/00021621.

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


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