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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 100901A: ISON-NM optical observations
  2. GRB 100814A: Maidanak optical observations
  3. GRB 100814A: Suzaku WAM observation of the prompt emission
  4. GRB 100814A: ISON-NM optical observations
  5. EVLA radio afterglow detection of GRB 100814A
  6. GRB 100814A: optical observations
  7. GRB 100814A : Liverpool Telescope Observations
  8. GRB 100814A: NOT optical observations
  9. Konus-Wind observation of GRB 100814A
  10. GRB 100814A : Lulin optical observation
  11. GRB100814A - interesting UVOT lightcurve.
  12. GRB 100814A: Fermi GBM observation
  13. GRB 100814A: Submm observations from APEX
  14. GRB 100814A: Swift-XRT refined analysis
  15. Swift/UVOT observations of GRB100814A
  16. GRB 100814A, Swift-BAT refined analysis
  17. GRB 100814A: CQUEAN r- and i-band Observation
  18. GRB 100814A: Enhanced Swift-XRT position
  19. GRB 100814A: GROND Detection of the Optical/NIR Afterglow
  20. GRB 100814A: IAC80 R-band observations
  21. GRB 100814A: Swift UVOT observations of the optical afterglow
  22. GRB 100814A: Swift detection of a burst with an optical afterglow
  23. GRB 100814A: ROTSE-III Detection of Optical Counterpart

Advanced

Download all Circulars as a .tar.gz archive:
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