{
  "bibcode": "1998GCN....33....1E",
  "body": "GRB 980326: Optical Transient Confirmed:\n\nA. C. Eichelberger, S. R. Kulkarni, S. G. Djorgovski (California\nInstitute of Technology) report on behalf of the Caltech-Keck GRB\neffort:\n\nOn UT March 27, 1998, A. V. Filippenko, D. C. Leonard and A. G. Reiss\n(U. C. Berkeley), observed the WFC localization region (IAUC 6851) with\nthe Low Resolution Imaging Spectrograph (LRIS) on the Keck II\ntelescope.  On UT March 28, 1998, H. Spinrad, A. Bunker, D. Stern (U.\nC. Berkeley), A. Dey (JHU) and S. A. Stanford (IGPP), observed the\nsame field with LRIS.  For both nights images were obtained in the R band.\n\nWe report the following magnitudes for the variable object reported by\nGroot et al. (IAUC 6852; also previous GCN note #32):\n\n      R(UT 1998 March 27.31) = 21.04 mag.\n      R(UT 1998 March 28.25) = 23.54 mag.\n\nThe zero point was set by assuming R=21.7 magnitude for the object\ndesignated as \"comparison star 2\" by Groot et al.  (IAUC 6852; R=21.7).\n\nCombining the two Keck points with the R magnitude from the AAT\nobservations (IAUC 6852) we find the variable source exhibits a power\nlaw decay with index = -2.0 This is considerably steeper than those\nexhibited by optical transients of previous GRBs.\n\nThis note is citeable.",
  "circularId": 33,
  "createdOn": 891147877000,
  "email": "srk@astro.caltech.edu",
  "subject": "GRB980326 optical observations",
  "submitter": "Shri Kulkarni at Cal Tech  <srk@astro.caltech.edu>",
  "eventId": "GRB 980326"
}