{
  "bibcode": "2000GCN...524....1J",
  "body": "B. L. Jensen, J. Hjorth, J. Pritchard, H. Pedersen (U. of Copenhagen)\nN. Masetti, E. Palazzi (ITeSRE-CNR, Bologna)\nJ. Gorosabel (LAEFF-INTA, Madrid)\nA. J. Castro-Tirado (LAEFF-INTA, Madrid and IAA-CSIC, Granada)\nM. Salvato (AIP, Potsdam)\nC. Kouveliotou (USRA, at NASA/MSFC Huntsville)\nE. Rola, L. Kaper (U. of Amsterdam)\nM. R. Zapatero-Osorio and  A. Rosenberg (IAC, Tenerife)\n\nreport on behalf of a larger European collaboration:\n\n\"We have obtained images of the RXTE/IPN error box of GRB 000115\n(Marshall et al. GCN #519; Hurley et al. GCN #520), with the\nCTIO 0.9m telescope, the ESO Danish 1.5m telescope (+DFOSC),\nthe 1.23m CAHA telescope and the 0.82m IAC telescope, in BVR\nbetween Jan 17.127 and Jan 21.382, as follows:\n\nTelescope, Filter, Exp., Date,                     Seeing, Lim_mag.\n===================================================================\n1.5DK         R   6x300s (2000 Jan 17.127-17.155 UT), 1.8\"  22.3\n1.5DK         R   6x300s (2000 Jan 17.329-17.357 UT), 1.7\"  22.5\n\nCTIO          R   3x600s (2000 Jan 17.093-17.115 UT), 1.6\"  21.5\nCTIO          R   3x600s (2000 Jan 17.243-17.265 UT), 1.6\"  21.6\n\n1.23-CAHA     B     900s (2000 Jan 17.956-17.967 UT), 2.2\"  21.1\n1.23-CAHA     R   2x450s (2000 Jan 17.941-17.954 UT), 2.0\"  22.5\n\nIAC80         R   4x900s (2000 Jan 18.050-18.083 UT), 2.4\"  21.2\nIAC80         R   4x900s (2000 Jan 18.096-18.129 UT), 2.4\"  21.2\n\n1.23-CAHA     V     600s (2000 Jan 18.065-18.073 UT), 2.2\"  22.0\n1.23-CAHA     B    1200s (2000 Jan 18.953-18.967 UT), 2.3\"  21.4\n\n1.23-CAHA     B    1800s (2000 Jan 19.946-19.967 UT), 3.6\"  20.5\n\n1.5DK         R   8x300s (2000 Jan 21.344-21.382 UT), 2.0\"  22.0\n\nNo optical afterglow candidate is evident from analyzing these\ndata, nor from comparison with DSS. We found no object down to\nR~22.0 (B~20.5) (USNO A2.0-based calibration) to show variation of more\nthan R=0.3 (B=0.3) mag during the period observed.\"",
  "circularId": 524,
  "createdOn": 948931183000,
  "email": "brian_j@astro.ku.dk",
  "subject": "GRB 000115 Optical observations",
  "submitter": "Brian Lindgren Jensen at U.of Copenhagen  <brian_j@astro.ku.dk>",
  "eventId": "GRB 000115"
}