Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 10346

GRB 100117A: Gemini North spectroscopy
2010-01-19T06:55:58Z (14 years ago)
Edo Berger at Harvard <>
E. Berger, R. Chornock (Harvard), A. Cucchiara, D. B. Fox (PSU)

"Starting on 2010 Jan 19.22 UT we used the GMOS spectrograph on the 
Gemini North 8-m telescope to obtain spectroscopic observations of
several extended objects (GCNs 10339, 10340, 10341) located inside and
near the revised XRT error circle (GCN 10342) of the short GRB 100117A
(GCN 10336).  The slit was aligned so that it covered sources S1, S2,
and S3 (GCN 10339).  Preliminary inspection of the combined 3000 sec
spectrum covering the wavelength range 4000-8000 A reveals that source
S1 is an M dwarf star.  We detect continuum emission from sources S2
and S3 redward of about 5000 and 5600 A, respectively, but no clear
emission or absorption features are identified."
Looking for U.S. government information and services? Visit