GRB 210626A: Swift-XRT afterglow detection
Abstract
Swift-XRT has performed follow-up observations of the Swift/BAT-GUANO-detected burst GRB 210626A (Aaron Tohuvavohu et al. GCN Circ. 30325), collecting 1.4 ks of Photon Counting (PC) mode data between T0+29.7 ks and T0+31.1 ks. An uncatalogued X-ray source is detected and is above the 2SXPS 3-sigma upper limit at this position, and is therefore likely the GRB afterglow. Using 1180 s of PC mode data and 1 UVOT image, we find an enhanced XRT position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 221.52429, -1.15625 which is equivalent to: RA (J2000): 14h 46m 05.83s Dec(J2000): -01d 09' 22.5" with an uncertainty of 5.7 arcsec (radius, 90% confidence). This position is 5.7 arcmin from the Swift/BAT-GUANO position. We cannot determine at the present time whether the source is fading. The results of the XRT-team automatic analysis of the likely afterglow are at https://www.swift.ac.uk/ToO_GRBs/00021453/Source1.php. The results of the full analysis of the XRT observations are available at https://www.swift.ac.uk/ToO_GRBs/00021453. This circular is an official product of the Swift-XRT team.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- June 2021
- Bibcode:
- 2021GCN.30329....1P