{
  "bibcode": "2003GCN..1894....1G",
  "body": "J. Greiner (MPE Garching),\nC. Ries, H. Barwig (Uni. Munich),\nJ. Fynbo (Uni Aarhus),\nS. Klose (TLS Tautenburg),\non behalf of the GRACE collaboration\n\nreport:\n\nWe observed the afterglow of the HETE burst (H10893; Suzuki et al., GCN 1888) \nGRB 030226 (Fox et al., GCN 1879; Price et al., GCN 1880) in the R band\nwith the EMMI and SUSI instruments at the NTT (La Silla, ESO) and the MONICA\nimager at the Wendelstein 0.8 m telescope (Germany). We calibrated against\nthe USNO-B R2 magnitudes of 5 surrounding stars which provides basically\nthe same calibration as that given for stars A and B by Garnavich et al. \n(GCN 1885; R=15.39 +/-0.05 and R=17.06 +/-0.05, respectively). A preliminary\nreduction gives the following magnitudes:\n\n                 Start time    exposure      OT         star A        star B\nNTT/EMMI       Feb 26 08:27   3x300 s   18.80+-0.07   15.40+-0.05   17.05+-0.05\nWendelstein    Feb 26 19:04   2x600 s   19.87+-0.10   15.47+-0.08   17.05+-0.10\nWendelstein    Feb 27 03:12     600 s   20.60+-0.13   15.42+-0.08   17.04+-0.10\nWendelstein    Feb 27 03:23     600 s   20.74+-0.13   15.43+-0.08   17.05+-0.10\nNTT/SUSI       Feb 27 05:25   3x180 s   21.00+-0.20   15.47+-0.10      ---\n\nWe confirm the decay slope of -0.88 as communicated by Price & Warren\n(GCN 1890) until about 0.8 days after the GRB. Thereafter, the brightness\nseems to drop significantly faster. A light curve plot will be available\nat http://www.mpe.mpg.de/~jcg/grb030226.html. Further monitoring is strongly \nencouraged.\n\nWe are grateful for the assistence of the staff at La Silla and Wendelstein.",
  "circularId": 1894,
  "createdOn": 1046336144000,
  "email": "jcg@mpe.mpg.de",
  "subject": "Possible break in the GRB 030226 light curve",
  "submitter": "Jochen Greiner at MPI  <jcg@mpe.mpg.de>",
  "eventId": "GRB 030226"
}