GCN Circular 44743
Subject
EP260527a/GRB 260527A: further FTW optical and NIR observations
Event
Date
2026-05-30T13:40:09Z (4 months ago)
From
Ziyuan.Zhu@campus.lmu.de
Via
Web form
Ziyuan Zhu (LMU), Malte Busmann (LMU), Brendan O'Connor (CMU), Julius Gassert (LMU/CMU), Daniel Gruen (LMU), Xander Hall (CMU), and Antonella Palmese (CMU) report:
We observed the counterpart of EP260527a/GRB 260527A (Yang et al., GCN 44718; Aguilar-Ruiz et al., GCN 44719; Li et al., GCN 44720; Svinkin et al., GCN 44722; Yu et al., GCN 44724; Yang et al., GCN 44725; Kawakubo et al., GCN 44726; Mo et al., GCN 44727; Busman et al., GCN 44728) with the Three Channel Imager (3KK) at the Fraunhofer Telescope at Wendelstein Observatory (FTW) in the r, i, and J bands for 48x 180s starting at starting at 2026-05-29 20:47 UT (2.6 days after the trigger). In the r band, we do not detect the counterpart down to a limiting magnitude of
r > 24.0 AB mag.
The magnitude is calibrated against the PS1 catalog and not corrected for Galactic extinction.
We thank Christoph Ries from the Wendelstein Observatory for obtaining these observations.