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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.

Lucene Examples (click to copy):

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

23 results found.

  1. GRB 200829A: T100 observations
  2. GRB 200829A: optical observations, a light curve in R-filter
  3. GRB 200829A: Swift/UVOT-XRT photometric redshift
  4. GRB 200829A: Koshka Zeiss-1000 optical observations
  5. GRB 200829A: Liverpool Telescope observations
  6. GRB 200829A: Continued Nanshan/NEXT optical observations
  7. GRB 200829A: Kitab optical upper limit
  8. GRB 200829A: further SAO RAS optical observations
  9. GRB 200829A: Fermi GBM detection
  10. GRB 200829A: Swift-BAT refined analysis
  11. GRB 200829A: Nanshan/NEXT optical observations
  12. Konus-Wind detection of GRB 200829A (a clone of GRB 200826B?)
  13. GRB 200829A: SAO RAS optical observations
  14. GRB 200829A: THO optical observatios
  15. GRB 200829A: Swift-XRT refined Analysis
  16. GRB200829A: optical afterglow detection
  17. GRB 200829A: Global MASTER-Net OT detection
  18. GRB 200829A: AGILE/MCAL detection
  19. GRB 200829A: Enhanced Swift-XRT position
  20. GRB 200829A: Swift/UVOT Detection
  21. Swift GRB 200829A: Global MASTER-Net observations report
  22. GRB 200829A: TSHAO optical observations
  23. GRB 200829A: Swift detection of a burst with an optical afterglow

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Download all Circulars as a .tar.gz archive:
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