{
  "bibcode": "2021GCN.29604....1S",
  "body": "B. Stecklum, S. Klose, A. Nicuesa Guelbenzu, S. Melnikov, and S. Hoegner \n(all Tautenburg) report:\n\nWe observed the field of GRB 210306A (D'Elia et al., GCN 29597) with the \nTautenburg 1.34m Schmidt telescope equipped with the TAUKAM 6kx6k CCD \ncamera.\n\nBetween 4:29 UT and 4:48 UT the afterglow was fading from R=17.33 +/- 0.02 \nto 17.53 +/- 0.09 mag (Vega), calibrated against the USNO B1 star at R.A., \nDecl. (J2000) = 129.924281, +60.163889 (DS9, R2mag = 15.23) close to the \nafterglow position.",
  "circularId": 29604,
  "createdOn": 1615050956000,
  "email": "klose@tls-tautenburg.de",
  "subject": "GRB 210306A: Tautenburg observations",
  "submitter": "Sylvio Klose at TLS Tautenburg  <klose@tls-tautenburg.de>",
  "eventId": "GRB 210306A"
}