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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"

21 results found.

  1. GRID detection of GRB 231205B
  2. GRB 231205B: VZLUSAT-2 detection
  3. GRB231205B: Swift/UVOT Upper Limits
  4. GRB 231205B: Swift-BAT refined analysis
  5. GRB 231205B: 1.3m DFOT Optical upper limit
  6. GRB 231205B: optical upper limit in TSHAOand AbAO
  7. GRB 231205B: AGILE detection
  8. GRB 231205B: Ondrejov D50 optical upper limit
  9. GRB 231205B: Swift-XRT refined Analysis
  10. GRB 231205B: REM optical/NIR upper limits
  11. GRB 231205B: NUTTelA-TAO / BSTI Early Optical Limits
  12. GRB 231205B: r'-band observations from MISTRAL at Observatoire de Haute-Provence
  13. GRB 231205B : MITSuME Akeno optical upper limits
  14. GRB 231205B: Zadko observatory - Gingin optical observations
  15. GRB 231205B: Gaoyazi/GOT optical upper limit
  16. GRB 231205B: Nanshan/HMT optical upper limit
  17. GRB 231205B: GECAM-B detection of a long burst
  18. GRB 231205B: LCOGT Optical Upper Limits
  19. GRB 231205B: Enhanced Swift-XRT position
  20. GRB 231205B: AKO Optical Upper Limit
  21. GRB 231205B: Swift detection of a burst

Advanced

Download all Circulars as a .tar.gz archive:
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