{
  "bibcode": "2020GCN.27582....1S",
  "body": "B. Stecklum, S. Klose, S. Melnikov, and A. Nicuesa Guelbenzu (all \nTautenburg) report:\n\nWe continued observing the field of GRB 200412B (Fermi GBM team, GCN \n27547) with the Tautenburg 1.34m Schmidt telescope equipped with the \nTAUKAM 6k x 6k CCD camera and the wide V-band filter (VB; Stecklum et al., \nGCN 27567; Klose et al., GCN 27575).\n\nFor the optical transient (Lipunov et al., GCN 27555, 27556) at a mean \ntime of 2.521 days post burst we measure VB = 21.38 +/- 0.06. This is \nabout 0.2 mag fainter than expected for a decay slope of alpha = 1.582 +/- \n0.004 based on our previous VB-band data (see also Xin et al., GCN 27571; \nBelkin et al., GCN 27574), suggesting that the light curve decay is \nsteepening. Additional data are required to confirm (or reject) this \nconclusion.\n\nWe note that in our images there is still no evidence for an underlying \nhost galaxy.",
  "circularId": 27582,
  "createdOn": 1586943032000,
  "email": "klose@tls-tautenburg.de",
  "subject": "GRB 200412B: continued Tautenburg observations",
  "submitter": "Sylvio Klose at TLS Tautenburg  <klose@tls-tautenburg.de>",
  "eventId": "GRB 200412B"
}