{
  "bibcode": "2020GCN.27035....1S",
  "body": "B. Stecklum, S. Klose, A. Nicuesa Guelbenzu, and C. Hoegner (all Tautenburg) \nreport:\n\nWe observed the field of GRB 200131A (T0=22:41:15 UT; Sbarufatti et al., GCN \n26953) with the Tautenburg 1.34m Schmidt telescope equipped with the TAUKAM 6k \nx 6k CCD camera and the wide V-band filter (VB). The transmission curve of this \nfilter closely follows the Gaia GBP filter.\n\nBased on several Gaia DR2 stars in the field within 1 arcmin radius about the \nafterglow position, we measure for the optical transient (Lipunov et al., GCN \n26954; Butler et al., GCN 26957; Strausbaugh et al., GCN 26959; Gokuldass et \nal., GCN 26960; Kuin et al., GCN 26962; Pozanenko et al., GCN 26964, 26965; \nWatson et al., GCN 26977) the following Vega magnitudes:\n\nmean time t = Jan 31, 23:12:15 UT; t-T0 = 00h 31m 00s;  VB = 18.00 +/- 0.10\nmean time t = Feb 01, 20:41:47 UT; t-T0 = 22h 00m 32s;  VB = 21.85 +/- 0.30.",
  "circularId": 27035,
  "createdOn": 1581435577000,
  "email": "klose@tls-tautenburg.de",
  "subject": "GRB 200131A: Tautenburg observations",
  "submitter": "Sylvio Klose at TLS Tautenburg  <klose@tls-tautenburg.de>",
  "eventId": "GRB 200131A"
}