{
  "bibcode": "2020GCN.26891....1W",
  "body": "Alan M. Watson (UNAM), Nat Butler (ASU), Alexander Kutyrev (GSFC),\nWilliam H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J.\nXavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (UVI),\nEleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz\n(UCSC), Jes��s Gonz��lez (UNAM), Carlos Rom��n-Z����iga (UNAM), Harvey\nMoseley (GSFC), John Capone (UMD), V. Zach Golkhou (U. Wash.), and Vicki\nToy (UMD) report:\n\nWe observed the field of GRB 200125A (Lien et al., GCN Circ. 26876) with\nthe Reionization and Transients Infrared Camera (RATIR; www.ratir.org)\non the 1.5m Harold Johnson Telescope at the Observatorio Astron��mico\nNacional on Sierra San Pedro M��rtir from 2020/01 26.42 to 2020/01 26.56\nUTC (22.62 to 25.89 hours after the BAT trigger), obtaining a total of\n2.52 hours exposure in the r and i bands.\n\nThe source we reported previously (Watson et al., GCN Circ. 26882) has\nfaded, confirming that it is the afterglow. In comparison with the\nUSNO-B1 and 2MASS catalogs, we obtain the following detections:\n\n  r\t= 23.03 +/- 0.29\n  i\t= 21.27 +/- 0.05\n\nThese magnitudes are in the AB system and are not corrected for Galactic\nextinction in the direction of the GRB.\n\nWe thank the staff of the Observatorio Astron��mico Nacional in San Pedro \nM��rtir.",
  "circularId": 26891,
  "createdOn": 1580072931000,
  "email": "alan@astro.unam.mx",
  "subject": "GRB 200125A: Further RATIR Optical Observations and Confirmation of Fading",
  "submitter": "Alan M Watson at UNAM  <alan@astro.unam.mx>",
  "eventId": "GRB 200125A"
}