TITLE:   GCN CIRCULAR
NUMBER:  37269
SUBJECT: GRB 240824A: Swift-XRT observations
DATE:    24/08/25 09:55:54 GMT
FROM:    Phil Evans at U of Leicester <pae9@star.le.ac.uk>

A. Tohuvavohu (U. Toronto), D.N. Burrows (PSU), J. D. Gropp (PSU), A.P.
Beardmore (U. Leicester), J.P. Osborne (U. Leicester), E. Ambrosi 
(INAF-IASFPA) , M. Capalbi (INAF-IASFPA), M. Perri (SSDC & INAF-OAR)
and P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:

We have analysed 10.4 ks of Photon Counting (PC) mode XRT data for the
Swift-BAT-detected burst GRB 240824A, collected between T0+-897 s and
T0+40.9 ks. 

One uncatalogued X-ray source has been detected consistent with being
within 3 arcmin of the Swift-BAT position, however it is not above the
RASS limit or shows definitive signs of fading. Therefore, at the
present time we cannot identify it as the afterglow. Details of the
source are given below:

Source 4:
  RA (J2000.0):  213.1710  =  14:12:41.05
  Dec (J2000.0): +63.7283  =  +63:43:41.7
  Error: 5.4 arcsec (radius, 90% conf.)
  Count-rate: (1.26 [+0.55, -0.44])e-3 ct s^-1	 
  Distance: 59 arcsec from Swift-BAT position.
  Flux: (3.0 [+1.3, -1.1])e-14 erg cm^-2 s^-1 (observed, 0.3-10 keV)

Seven uncatalogued sources were also detected too far from the GRB
position to be likely afterglow candidates.

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/01250282.

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