{
  "bibcode": "2016GCN.19152....1D",
  "body": "A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), T. Kruehler (MPE Garching)\nD. Xu (NAOC/CAS), D. Malesani (DARK/NBI), Z. Cano (U. Iceland),\nN.R. Tanvir (U. Leicester),M. Messa (Stockholm Univ., Oskar Klein Centre), \nE. Gafton (NOT, Stockholm Univ. and Oskar Klein Centre) and I. R. Losada \n(Nordita and Stockholm Univ.) report on behalf of a larger collaboration:\n\nWe continued the monitoring of GRB 160303A (Beardmore et al., \nGCN 19126) with MOSCA at the 2.5m Nordic Optical Telescope \n(La Palma, Spain).\n\nOn a 9x300s  observation with mean epoch 2:10 UT of 5 March 2016 \n(37.27 hr after the burst) we detect the afterglow (Butler et al GCN19131) \nat a magnitude of r = 25.2 +/- 0.2, as compared to the SDSS field stars. \nThis is consistent with the magnitude reported by GROND (Bolmer et al. \nGCN 19150) at a similar epoch.\n\nGathering the r-band data from the different GCNs (Butler et al. GCN19131; \nde Ugarte Postigo et al. GCN 19136; Jeong et al. GCN 19140; Im et al. \nGCN 19141; Klose et al. GCN 19142; de Ugarte Postigo et al. GCN 19143; \nGraham et al. GCN 19144; Bolmer et al. GCN 19150) the light curve seems \nto have been flat, or even increasing in brightness during the first 4-8 hrs \nafter the burst. After this, the light curve begins a steep decay with \nalpha = 1.23 +/- 0.14 (F_nu ~ t^-alpha). This is not unlike the behaviour of \nother short GRBs, f.ex. GRB 130603B (de Ugarte Postigo et al. 2014 \nA&A 563, 62), which was interpreted as being a magnetar powered event.",
  "circularId": 19152,
  "createdOn": 1457210102000,
  "email": "deugarte@iaa.es",
  "subject": "GRB 160303A: Continued optical monitoring from NOT",
  "submitter": "Antonio de Ugarte Postigo at IAA-CSIC  <deugarte@iaa.es>",
  "eventId": "GRB 160303A"
}