{
  "bibcode": "2003GCN..2215....1W",
  "body": "Michael Weidinger, Johan P. U. Fynbo (U. of Aarhus), Jens Hjorth \n(U. of Copenhagen), Javier Gorosabel (IAA-CSIC/STScI), Sylvio Klose \n(TLS Tautenburg), Nial Tanvir (U. of Hertfordshire) report on behalf of the \nGRACE collaboration:\n\n\"Further analysis of the VLT spectra of the afterglow of GRB 030429 \n(GCN 2184) and the neighbor galaxy at a separation of 1.2 arcsec from the \nafterglow (GCN 2185, 2196) has led to the following conclusions. Based on \nabsorption lines due to HI, OI, SiII, and CII we infer a redshift of \nz=2.6564+/-0.0008 for GRB 030429. Based on a single, weak emission line in \nthe spectrum of the neighbor galaxy, which we interpret as [OII], and weak \nCalcium H and K absorption we infer a redshift of z=0.841+/-0.001 for the \ngalaxy. This is consistent with the redshift of an absorption line in the \nspectrum of the afterglow if interpreted as MgII. This galaxy is therefore \nnot the host galaxy of the GRB. In deep images obtained with the VLT/FORS2 \non May 5 the afterglow is only barely detected. We do not find any evidence \nfor a host galaxy at the position of the afterglow to R>25. The separation \nbetween the position of the afterglow and the z=0.841 neighbor galaxy of 1.2 \narcsec is comparable to the Einstein radius for a massive galaxy at that \nredshift. Gravitational lensing could therefore affect the appearance of \nGRB 030429.\n\nWe acknowledge excellent support from the Paranal Observatory staff.\"",
  "circularId": 2215,
  "createdOn": 1052323953000,
  "email": "jfynbo@phys.au.dk",
  "subject": "GRB 030429: Redshift of neighbor galaxy",
  "submitter": "Johan U. Fynbo at IFA,U of Aarhus  <jfynbo@phys.au.dk>",
  "eventId": "GRB 030429"
}