{
  "submitter": "Shri Kulkarni at Caltech <srk@astro.caltech.edu>",
  "editedOn": 1720123944977,
  "eventId": "GRB 970228",
  "subject": "GRB 970228: Keck/LRIS Optical Observations",
  "version": 3,
  "circularId": -4,
  "editedBy": "Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma@nasa.gov> on behalf of Tyler Barna at University of Minnesota <tylerpbarna@gmail.com>",
  "createdOn": 871516800000,
  "format": "text/plain",
  "email": "circulars@gcn.nasa.gov",
  "body": "Shri Kulkarni et al. report the following (also submitted to the IAUCs):\n\n   S. R. Kulkarni, S. G. Djorgovski, and J. C. Clemens, California\n   Institute of Technology, report: \"On 13 August 1997 UT, we used the Low\n   Resolution Imaging Spectrograph mounted on the Keck II telescope to\n   acquire spectra at the position of the GRB 970228 optical transient\n   reported in IAUC 6584.  We placed a 1.5-arcsec slit (PA=87 degrees) at\n   the location specified in IAUC 6588 (Metzger et al.), and used a\n   low resolution grating (300 l/mm blazed at 5000 A) to acquire exposures\n   totalling 1800 s.  A spectral trail is well detected in this location.\n   The spectrum has some weak features but no strong emission lines.\n   The detected flux is consistent with an object of R magnitude\n   between 24 and 25.\" \n\n\n\n////////////////////////////////////////////////////////////////////////\nEd. Note April 2024: Title is updated in the new GCN system using the moderation tool.\nEd. Note 22Mar98:  This is the initial GCN Circular.  It has the -4 serial\nnumber because of a mistake I made in making the initial number assignments\nwhen I started the assignments at around circular #15.  See the explanation\nat the bottom of the Circular Archive List web page.\n"
}