[vsnet-grb-info 27501] GRB 210306A: Tautenburg observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  29604
SUBJECT: GRB 210306A: Tautenburg observations
DATE:    21/03/06 17:15:56 GMT
FROM:    Sylvio Klose at TLS Tautenburg  <klose at tls-tautenburg.de>

B. Stecklum, S. Klose, A. Nicuesa Guelbenzu, S. Melnikov, and S. Hoegner 
(all Tautenburg) report:

We observed the field of GRB 210306A (D'Elia et al., GCN 29597) with the 
Tautenburg 1.34m Schmidt telescope equipped with the TAUKAM 6kx6k CCD 
camera.

Between 4:29 UT and 4:48 UT the afterglow was fading from R=17.33 +/- 0.02 
to 17.53 +/- 0.09 mag (Vega), calibrated against the USNO B1 star at R.A., 
Decl. (J2000) = 129.924281, +60.163889 (DS9, R2mag = 15.23) close to the 
afterglow position.