GCN Circular 27807
Subject
GRB 200524A: CAHA multicolor afterglow detection
Event
Date
2020-05-24T23:38:09Z (6 years ago)
From
Alexander Kann at IAA-CSIC <kann@iaa.es>
A. de Ugarte Postigo (HETH/IAA-CSIC, DARK/NBI), D. A. Kann, M. Blazek,
C. Thoene, J. F. Agui Fernandez (all HETH/IAA-CSIC), R. Pedro Hedrosa,
and A. Guijarro (both CAHA) report:
We observed the field of GRB 200524A (Fermi-LAT detection: Dirirsa et
al. GCN #27797) with CAFOS, on the 2.2 m telescope, at Calar Alto
observatory (Almeria, Spain). Observations consisted of 3 x 500 s in
BVRc each, and 8 x 180 s in Ic-band.
The afterglow (Ho et al., GCN #27799, Kumar et al., GCN #27800,
Rumyantsev et al., GCN #27802, Sanwal et al., GCN #27803, Perley et al.,
GCN #27805, Kumar et al., GCN #27806) is well-detected in each image. In
an Rc image starting at 21:49:33 UT (mid-time 0.701188 days after the
Fermi GBM trigger), we measure Rc = 20.86 +/- 0.12 mag (Vega mags)
against five nearby SDSS stars transformed to the Rc band.