{
  "bibcode": "2009GCN..9809....1X",
  "body": "D. Xu, J.P.U. Fynbo (DARK/NBI), P. Jakobsson (Univ. Iceland), Tiina \nLiimets (NOT) report on behalf of a larger collaboration:\n\nWe observed the field of GRB 090814A (Ukwatta et al. GCN 9793; Updike et \nal., GCN 9794) with the Nordic Optical Telescope equipped with ALFOSC. \nWe obtained 3x600 s R-band frames staring on August 14th,  21:15:11 UT, \n20.38 hr after the burst.\n\nThe optical afterglow is clearly detected in each frame. The magnitude \nis R~22.4 calibrated against the reference star, #1156-0231252 with \nR2=19.25,  of the USNO B1 catalog.\n\nCompared with the previous measurement of R~21.5 around 70 mins after \nthe burst (Jakobsson et al., GCN 9797), the afterglow is decaying quite \nshallowly, with a power-law slope of ~0.3, being consistent with the \nX-ray decaying law during the same period (Page & Ukwatta, GCN 9801).",
  "circularId": 9809,
  "createdOn": 1250290959000,
  "email": "dong@astro.ku.dk",
  "subject": "GRB090814A: NOT optical follow-ups",
  "submitter": "Dong Xu at DARK,NBI  <dong@astro.ku.dk>",
  "eventId": "GRB 090814A"
}