{
  "bibcode": "2013GCN.14913....1R",
  "body": "R. Ruffini, C.L. Bianco, M. Enderli, M. Muccino, A.V. Penacchioni, G.B.\nPisani, J.A. Rueda, N. Sahakyan, Y. Wang report:\n\nAfter a rest-frame time of 5000 sec from the BAT trigger (Melandri et\nal., GCN 14735), the late X-ray rest-frame luminosity of GRB 130603B\noverlaps the one of GRB 090510A (see the figure at:\n<http://www.icra.it/temp/GCN/20130614.png>). This match occurs\nirrespectively of their isotropic energies, which differ by a factor of\n~50 (GRB 130603B: E_iso = 2.1 * 10^51 erg, Frederiks et al., GCN 14772;\nGRB 090510A: E_iso = 1.1 * 10^53 erg, Muccino et al. 2013, ApJ, in\npress, arXiv:1306.3467).\n\nAccording to Muccino et al. 2013, GRB 090510A is a long GRB exploded in\na high density enviroment (10^3 particles/cm^3). The similarity shown\nin the plot indicates that also GRB 130603B could be a long duration\nGRB observed at closer distance (z~0.35). Therefore the detection (or\nnot detection) of a supernova associated to GRB 130603B between\n20th-23rd of June, becomes a crucial test.\n\nObservations are strongly encouraged.",
  "circularId": 14913,
  "createdOn": 1371493325000,
  "email": "ruffini@icra.it",
  "subject": "GRB 130603B: Analogy with GRB 090510A and possible connection with a supernova",
  "submitter": "Remo Rufinni at ICRA  <ruffini@icra.it>",
  "eventId": "GRB 130603B"
}