{
  "bibcode": "2010GCN.10547....1R",
  "body": "Arne  Rau, Marco Nardini  (both MPE  Garching), Adria  Updike (Clemson\nUniversity), Robert  Filgas, Jochen Greiner, Thomas  Kruehler (all MPE\nGarching), and Sylvio  Klose (TLS Tautenburg) report on  behalf of the\nGROND team:\n\nWe  report on  additional observations  of  the field  of GRB  100316D\n(Swift trigger 416135; Stamatikos et al., GCN 10496) simultaneously in\ng'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at\nthe  2.2  m  MPI/ESO   telescope  at  La  Silla  Observatory  (Chile).\nObservations started  on 17 March 2010  at 00:27 UT,  11.7 hours after\nthe burst (Afonso et al., GCN Circular #10514). The field was observed\nduring additional 16 epochs and observations are continuing.\n\nImage subtraction revealed the supernova SN2010bh reported by Wiersema\net al.  (GCN Circular #10525),  Chornock et al. (GCN Circular #10541),\nand Bufano  et al.   (GCN Circular #10543)  to emerge approx.   5 days\npost-burst and  to reach an AB  magnitude of r  ~ 18.8 +/- 0.2  at 7.5\ndays post-burst.\n\nThe observed light  curve evolution of SN2010bh is  similar to that of\nSN1998bw  (Galama  et  al.    1998),  the  supernova  associated  with\nGRB980425, shifted to the  redshift of GRB100316D (z=0.059; Vergani et\nal., GCN  Circular #10512).  The  optical luminosity is  comparable to\nSN1998bw,  except in  the  g-band,  where the  flux  is suppressed  by\napprox.   30%.   This  likely  corresponds  to  the  significant  flux\ndeficiency in the range 450-550nm reported from the X-Shooter spectrum\n(Bufano et al., GCN Circular #10543).",
  "circularId": 10547,
  "createdOn": 1269644323000,
  "email": "arau@mpe.mpg.de",
  "subject": "GROND observations of GRB100316D/SN2010bh",
  "submitter": "Arne Rau at MPE  <arau@mpe.mpg.de>",
  "eventId": "GRB 100316D"
}