{
  "bibcode": "2003GCN..1939....1H",
  "body": "K. Hurley and T. Cline, on behalf of the Ulysses, HETE, Mars Odyssey,\nand KONUS GRB teams,\n\nE. Mazets and S. Golenetskii, on behalf of the Konus-Wind GRB team,\n\nD. M. Smith, R. P. Lin, J. McTiernan, R. Schwartz, C. Wigger, W.\nHajdas, and A. Zehnder, on behalf of the RHESSI GRB team,\n\nA. von Kienlin, G. Lichti, and A. Rau, on behalf of the\nINTEGRAL SPI-ACS GRB team,\n\nI. Mitrofanov, D. Anfimov, A. Kozyrev, M. Litvak and A. Sanin, on\nbehalf of the HEND-Odyssey GRB team,\n\nW. Boynton, C. Fellows, K. Harshman, C. Shinohara and R. Starr, on\nbehalf of the GRS-Odyssey GRB team, and\n\nG. Ricker, J-L Atteia, N. Kawai, D. Lamb, S. Woosley, J. Doty, R.\nVanderspek, J. Villasenor, G. Crew, G. Monnelly, N. Butler, J.G.\nJernigan, A. Levine, F. Martel, E. Morgan, G. Prigozhin, J. Braga, R.\nManchanda, G.  Pizzichini, Y. Shirasaki, C. Graziani, M. Matsuoka, T.\nTamagawa, K. Torii, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi,\nT. Tavenner, T.  Donaghy, M. Boer, J-F Olive, and J-P Dezalay, on\nbehalf of the HETE GRB team, report:\n\nWe have searched the IPN data for a gamma-ray burst that might be\nassociated with SN2003L (Boles, IAUC 8048; Valenti et al., IAUC 8057;\nKulkarni et al., IAUC 8061; Kulkarni & Fox, IAUC 8073).  It has been\nsuggested by Soderberg et al. (GCN 1834) that SN2003L is actually a\nhypernova, and might therefore be similar to SN1998bw/GRB980425.  We\nhave limited our search to data obtained between November 10 2002 and\nJanuary 10 2003.  The missions and experiments in the IPN were Ulysses,\nKonus-Wind, RHESSI, Mars Odyssey (HEND and GRS), HETE-2 (FREGATE), and\nINTEGRAL (SPI-ACS).  The data on 41 bursts and candidate (unconfirmed)\nbursts were examined.  During that period, no burst which could be\nlocalized by the IPN was found to have a source position in any way\nconsistent with that of the supernova.  That is, there was no event\nobserved by two or more spacecraft that produced a source annulus or\nerror box consistent with the supernova.  Several events were observed\neach by single spacecraft in the network during this time.  Most of\nthem can be ruled out as counterparts because of the coarse\nlocalization capabilities of the experiments involved.  However, two such\nevents had positions which were not inconsistent with the position of\nSN2003L.  One occurred on 021213 at 41739 s, and was detected only by\nHETE-FREGATE.  Based on Earth-blocking considerations, the probability\nof a chance association with SN2003L is ~70%.  This burst had a fluence\nof roughly 10^-6 erg/cm^2.  The other occurred on 021228 at 53801 s and\nwas detected only by Konus-Wind.  Based on the ecliptic latitude\nresponse of the Konus detectors, the probability of a chance\nassociation is ~17%.  This burst had a fluence of ~2x10^-6 erg/cm^2.\n\nLacking any definite evidence for an association, we can give\nan  upper limit to the fluence of a GRB from SN2003L. This limit\ndepends on the duration, spectrum, and arrival time within the search\nwindow, all of which are unknown (see Hurley et al. GCN 1252), but can\nbe roughly taken to be several times 10^-7 erg/cm^2 in the energy range\nabove 25 keV.\n\nSN2003L is about 2.6 times more distant than SN1998bw.  Neglecting\nbeaming and other event-to-event variations, any associated GRB might\nbe expected to be 7 times less intense, and possibly undetectable by\nIPN instruments.",
  "circularId": 1939,
  "createdOn": 1048095518000,
  "email": "khurley@sunspot.ssl.berkeley.edu",
  "subject": "IPN upper limit to a GRB associated with SN2003L",
  "submitter": "Kevin Hurley at UCBerkeley/SSL  <khurley@sunspot.ssl.berkeley.edu>"
}