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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"

23 results found.

  1. GRB 130831A: VLT/FORS2 spectroscopic detection of a supernova
  2. GRB 130215A: Detection of the SN with the 10.4m GTC
  3. GRB 130215A: Suzaku WAM observation of the prompt emission
  4. GRB 130215A: PTF P48 optical detection
  5. GRB 130215A: Continued RATIR Optical and NIR Monitoring
  6. GRB 130215A: Additional P200 NIR observations
  7. GRB 130215A: P200 NIR observations
  8. GRB 130215A: GROND Detection of the Optical/NIR Afterglow
  9. GRB 130215A: MITSuME Okayama Optical Observation
  10. GRB 130215A: Fermi GBM detection
  11. GRB 130215A: RAPTOR Measurements
  12. GRB 130215A: GMG optical observation
  13. GRB 130215A: iTelescope T11 observations
  14. GRB 130215A: Xinglong optical observations
  15. GRB 130215A: Swift-BAT refined analysis
  16. GRB 130215A: TAROT La Silla observatory optical observations
  17. GRB 130215A: RATIR Optical and NIR Observations
  18. GRB 130215A: REM NIR observations
  19. GRB 130215A: CARMA 3mm detection
  20. GRB 130215A: P60 Observations
  21. GRB 130215A: ROTSE-III data analysis
  22. GRB 130215A: Redshift estimate
  23. GRB 130215A: Swift detection of a burst

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Download all Circulars as a .tar.gz archive:
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