{
  "bibcode": "2010GCN.10644....1F",
  "body": "R. Filgas (MPE Garching), D. A. Kann, S. Klose (all Tautenburg),\nM. Nardini, and J. Greiner (all MPE Garching), report on behalf of the GROND \nteam:\n\nGROND on La Silla (Greiner et al. 2008, PASP 120, 405)  continues \nobserving the afterglow of GRB 100418A.  GROND data, with the first epoch \nat 28 ks after the burst and the last data point at 133 ks after the \nburst, in combination with data from Updike et al. (GCN 10619), Antonelli \net al. (GCN 10620), Malesani (GCN 10621), Pearson et al. (GCN 10626), \nMalesani et al. (GCN 10631), Rumyantsev et al. (GCN 10634), Bikmaev et al. \n(GCN 10635), Updike et al. (GCN 10637), and Bikmaev et al. (GCN 10643), \nshow that the R-band afterglow light curve had a break at t = 1.11 +/- \n0.01 days and is now decaying with a slope of 2.41 +/- 0.08.\n\nWhile the steep decay of the afterglow is in favor of a SN search, the \nbright host (Malesani, GCN 10621) might make a detection difficult. \nAssuming a SN 1998bw template, a Galactic visual extinction along the line \nof sight of 0.2 mag, no GRB host extinction but 0.2 mag host extinction \nfor SN 1998bw, we predict the following SN peak times and magnitudes:\n\n      band         dt/days         mag\n      V            21.5           24.5\n      R            22.5           23.7\n      I            24.0           22.9\n      J            29.5           22.8\n\nThis message can be cited.",
  "circularId": 10644,
  "createdOn": 1271877641000,
  "email": "klose@tls-tautenburg.de",
  "subject": "GRB 100418A: further GROND observations and light curve fit",
  "submitter": "Sylvio Klose at TLS Tautenburg  <klose@tls-tautenburg.de>",
  "eventId": "GRB 100418A"
}