Skip to main content
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 4372

GRB 051221: Possible nearby cluster
2005-12-21T09:26:41Z (19 years ago)
Edo Berger at Carnegie Obs <>
E. Berger (Carnegie Observatories) reports:
"Further examination of the Gemini data reveals a clustering of faint
galaxies extending about 1.5' eastward from the position of the X-ray
afterglow (GCN 4366) and the optical/near-IR source possibly associated
with the burst (GCNs 4367-9):
Additional multi-band photometry and an analysis of spatial clustering are
required in order to verify whether this is a true galaxy cluster and
whether the optical/near-IR source is related to this possible structure.  
This analysis is in progress."
Looking for U.S. government information and services? Visit