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

GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').

14 results found.

  1. GRB 110530A: optical observations in Mondy observatory
  2. GRB 110530A: optical observations at Mt. Terskol, second epoch
  3. GRB 110530A: Swift-XRT refined Analysis
  4. GRB 110530A: Swift/UVOT Detection of a Fading Afterglow
  5. GRB 110530A: Xinglong TNT observation
  6. GRB 110530A: Enhanced Swift-XRT position
  7. GRB 110530A: NOT optical observations
  8. GRB110530A: MITSuME Okayama Optical Observation
  9. GRB 110530A: optical observations at Mt. Terskol
  10. GRB 110530A: Correction to GCN Circ 12050
  11. GRB 110530A: MASTER OT observations
  12. GRB 110530A: Swift-BAT refined analysis
  13. GRB 110530A: MITSuME Akeno Optical Observation
  14. GRB 110530A: Swift detection of a burst with an optical afterglow

Advanced

Download all Circulars as a .tar.gz archive:
Looking for U.S. government information and services? Visit USA.gov