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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"

22 results found.

  1. GRB 110213A, the review of the sky area in plate archives
  2. GRB 110213A: optical observations in CrAO
  3. GRB 110213A: optical observations in Mondy
  4. GRB 110213A: YNAO-GMG Observations
  5. GRB 110213A: TNT optical observations
  6. GRB 110213A: Fermi GBM observation
  7. GRB 110213A: MITSuME Akeno Optical Observation
  8. Konus-Wind observation of GRB 110213A
  9. GRB 110213A: Swift-XRT refined Analysis
  10. GRB110213A: MITSuME Okayama Optical Observation
  11. GRB 110213A: Swift/UVOT refined analysis
  12. GRB 110213A: THO optical observations
  13. GRB 110213A: Lightbuckets Optical Observations
  14. GRB 110213A, Swift-BAT refined analysis
  15. GRB 110213A: optical observations
  16. GRB 110213A: Enhanced Swift-XRT position
  17. GRB 110213A: KAIT observations
  18. GRB 110213A: GRAS011 optical observations
  19. GRB 110213A: Bok Telescope Redshift
  20. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  21. GRB 110213A: P60 Optical Afterglow Detection
  22. GRB 110213A: Swift detection of a burst with optical afterglow

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