{
  "bibcode": "2022GCN.31401....1N",
  "body": "A. Nicuesa Guelbenzu, S. Melnikov, S. Klose, B. Stecklum, F. Ludwig (all \nTLS Tautenburg) report:\n\nWe continued observing the field of GRB 220101A (Tohuvavohu et al., GCN \n31347) with the Tautenburg 1.34m Schmidt telescope equipped with the \nTAUKAM 6kx6k CCD camera (Stecklum et al. 2021; arXiv:2101.12554).\n\nFor the optical transient (discovered by Swift/UVOT: Tohuvavohu et al., \nGCN 31347; Kuin et al., GCN 31351) we measure the following AB magnitudes:\n\ng > 22.9  (3 sigma), January 6, 20:23 UT (midtime),\nr = 22.54 +/- 0.24,  January 6, 19:32 UT (midtime),\ni = 21.27 +/- 0.10,  January 6, 18:44 UT (midtime),\nz = 21.17 +/- 0.22,  January 6, 18:26 UT (midtime),\n\ncalibrated against the SDSS catalogue.",
  "circularId": 31401,
  "createdOn": 1641579154000,
  "email": "klose@tls-tautenburg.de",
  "subject": "GRB 220101A: Tautenburg observations",
  "submitter": "Sylvio Klose at TLS Tautenburg  <klose@tls-tautenburg.de>",
  "eventId": "GRB 220101A"
}