GCN Circular 41139
Subject
SVOM J195836+32283/sb25072103: Swift XRT/UVOT upper limits
Event
Date
2025-07-23T12:34:20Z (3 days ago)
From
noelklin@umbc.edu
Via
Web form
Noel Klingler (NASA-GSFC / UMBC / CRESST II), Brendan O'Connor (CMU), and Alexander Lange (GWU) report:
Swift has performed follow-up observations of SVOM J195836+32283 / sb25072103 (Götz et al; GCN Circ. 41131) between 2025-07-22T14:24:46 and 2025-07-22T14:40:52, which corresponds to 106.9 ks and 107.9 ks post-trigger.
The XRT collected 956 s of data. No counts (0.3-10 keV) are detected within a 25 arcsecond radius of the SVOM/MXT position (19h 58m 36s, +32° 28’ 20”).
The UVOT collected 950 s of data in the U-band. No source is seen at the position obtained by SVOM/VT (19h 58m 36.29s, +32° 28’ 25.7”); the 3 sigma limiting magnitude (AB) is 21.55.