{
  "bibcode": "2009GCN..9841....1C",
  "body": "S. B. Cenko, L. M. Walkowicz (UC Berkeley), M. M. Kasliwal, V. Bhalero, S.\nR. Kulkarni, F. A. Harrison (Caltech), I. Arcavi (Weizmann Institute) and\nW. H. Baumgartner (GSFC/UMBC) report on behalf of a larger collaboration:\n\nWe have obtained a spectrum of the putative host galaxy of GRB09817\n(Holland et al., GCNs 9831 and 9834) with the Low Resolution Imaging\nSpectrometer mounted on the 10 m Keck I telescope.  Our spectra were taken\nin twilight conditions at Aug 25.55 UT and cover a wavelength range from\n3500 - 9000 A.\n\nAfter correcting for the large Galactic extinction, the source exhibits\na blue continuum with superposed absorption features from the H Balmer\nseries (H-alpha, -beta, -gamma, and -delta) and Ca (H+K and the NIR\ntriplet), all consistent with their rest wavelengths.  As suggested by\nHalpern and Ruan (GCN 9837), the object is therefore a foreground star\n(likely a hot, ~ A-type) and likely unrelated to GRB090817.",
  "circularId": 9841,
  "createdOn": 1251274967000,
  "email": "cenko@srl.caltech.edu",
  "subject": "GRB090817: Keck/LRIS Spectroscopy",
  "submitter": "S. Bradley Cenko at Caltech  <cenko@srl.caltech.edu>",
  "eventId": "GRB 090817"
}