{
  "bibcode": "2007GCN..6590....1P",
  "body": "N. Primak, G. Szokoly, J. Greiner, C. Clemens, T. Kruehler, A. Kuepcue-Yoldas, \nA. Yoldas (all MPE Garching), S. Klose, A. Rossi (Tautenburg Observatory), \nand F. Carrier (Instituut voor Sterrenkunde Leuven, Belgium) report:\n\nWe observed the field of GRB 070628 (Swift trigger 283320; Holland et al., \nGCN 6584) with GROND at the 2.2m Max-Planck Institute telescope at the \nESO La Silla observatory in Chile. The observations started at 22:21:57, \nabout 7.7 hrs after the GRB and just after sunset, and lasted 10 min. \nWe observed simultaneously in the g,r,i,z,J,H,K bands. The UVOT afterglow\n(Cronwall & Holland, GCN 6585) is clearly detected at H=16.2+-0.3 and \nK=16.3+-0.2 mag. The NIR magnitudes are calibrated against 2MASS. \nNothing is visible in the J band (limiting magnitude 16.0), and all \noptical frames are saturated due to twilight. \n\nWe note that the afterglow was atypically bright for the given time after\nthe burst, suggesting a slow fading. We encourage near-IR spectroscopy to\ndetermine the redshift.",
  "circularId": 6590,
  "createdOn": 1183146852000,
  "email": "jcg@mpe.mpg.de",
  "subject": "GRB 070628: NIR detection of afterglow",
  "submitter": "Jochen Greiner at MPI  <jcg@mpe.mpg.de>",
  "eventId": "GRB 070628"
}