{
  "bibcode": "2015GCN.17871....1R",
  "body": "R. Ruffini, C. L. Bianco, M. Enderli, M. Kovacevic, M. Muccino, G. B.\nPisani, J. A. Rueda, Y. Wang reports:\n\nThe observation of high-energy emission from GRB 150513A by Fermi-LAT\n[1] clearly points to a binary-driven hypernova (BdHN) nature of the\nsource [2], in spite of the missing follow-up from Swift/XRT and UVOT\ndue to a Sun observing constraint which will last until the 28th of May\n[3].\n\nBdHNe have a standard behavior in the late X-ray luminosity [4,5,6],\nthus we expect the X-ray emission of GRB 150513A to follow such a\nbehavior as well.\n\nAssuming that the X-ray luminosity of GRB 150513A is comparable with\nthe BdHN prototypical one of GRB 090618 (GRB 130427A), a detection by\nSwift/XRT of GRB 150513A on the 28th of May implies an upper limit for\nits redshift z<0.8 (z<2).\n\nTherefore, we strongly encourage observation by Swift/XRT of GRB\n150513A from the 28th of May on. This would give a fundamental\ninformation on the nature of this source, despite the absence of data\nbetween May 13th and May 28th.\n\nReferences:\n[1] Kocevski et al. 2015, GCN 17812\n[2] Ruffini et al. 2015, ApJ, 798, 10R\n[3] Kocevski et al. 2015, GCN 17810\n[4] Ruffini et al. 2014, A&A, 565, L10\n[5] Pisani et al. 2013, A&A, 552, L5\n[6] Ruffini et al. 2014, A&A, 569, A39",
  "circularId": 17871,
  "createdOn": 1432598027000,
  "email": "ruffini@icra.it",
  "subject": "GRB 150513A: request for X-ray follow up",
  "submitter": "Remo Rufinni at ICRA  <ruffini@icra.it>",
  "eventId": "GRB 150513A"
}