Skip to main content
New Announcement Feature, Code of Conduct, Circular Revisions. 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').

16 results found.

  1. GRB 150811A: Continued RATIR Observations
  2. GRB 150811A: Continued RATIR Observations
  3. GRB 150811A: KAIT Refined Analysis
  4. GRB 150811A: VLA Detection
  5. GRB 150811A: Continued RATIR Observations
  6. GRB 150811A: Swift/UVOT further observations
  7. GRB 150811A: Swift-BAT refined analysis
  8. GRB 150811A: SAO RAS optical observations
  9. GRB 150811A: Swift-XRT refined Analysis
  10. GRB 150811A: P60 Observations
  11. GRB 150811A: Enhanced Swift-XRT position
  12. GRB 150811A: LCOGT-McDonald afterglow detection
  13. GRB 150811A: Swift/UVOT Detection
  14. GRB 150811A: KAIT optical candidate
  15. GRB 150811A: RATIR Optical Afterglow Detection
  16. GRB 150811A: Swift detection of a burst

Advanced

Download all Circulars as a .tar.gz archive:
Questions or comments?
Contact GCN directly.
Have you found a bug in GCN?
Open an issue.
Want to contribute code to GCN?
Get involved on GitHub.

gcn.nasa.gov

A service of the Astrophysics Science Division at NASA Goddard Space Flight Center

Looking for U.S. government information and services? Visit USA.gov