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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').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

21 results found.

  1. GRB 211227A: Deep early CAHA 2.2m/CAFOS observation
  2. GRB 211227A: A possible short GRB with extended emission at z = 0.228?
  3. GRB 211211A - Gemini K-band detection
  4. GRB 181225A: CALET Gamma-Ray Burst Monitor detection
  5. GRB 060614: theoretical derivation of the redshift and need for deeper search of the host galaxy
  6. GRB060614 ATCA Radio Limits
  7. GRB 060614: SMARTS host galaxy observations
  8. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  9. GRB 060614: redshift confirmation
  10. GRB 060614: Redshift
  11. GRB 060614: spectroscopy
  12. GRB 060614: pseudo-z from spectral parameters of the prompt emission
  13. Konus-Wind observation of GRB 060614
  14. The Unusually Long-Lived Afterglow of GRB 060614
  15. GRB 060614: optical observations
  16. GRB 060614, SMARTS optical/IR afterglow observation
  17. GRB060614: SSO 1m observations
  18. GRB060614: Watcher observation
  19. GRB 060614: Swift-BAT refined analysis
  20. GRB 060614: Swift/UVOT Observations
  21. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart

Advanced

Download all Circulars as a .tar.gz archive:
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