Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 1200

GRB 011211: Optical Spectroscopy
2001-12-13T20:19:00Z (23 years ago)
Andrew S. Fruchter at STScI <>
A. Fruchter (STScI), P. Vreeswijk (A'dam), J. Rhoads, and I. Burud (STScI) 
report for a larger collaboration:

We have observed the optical counterpart of GRB (XRF) 011211 (GCN 1188, 1191) 
using the FORS2 spectrograph on the Yepun (VLT4) 8-m telescope of the European 
Southern Observatory.  We find an absorption line system corresponding to a 
redshift of z=2.14 superposed on the continuum emission.  Hydrogen Lyman 
alpha, as well as the absorption lines of several metals including C, Fe and 
Si, are clearly detected.
Looking for U.S. government information and services? Visit