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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"

35 results found.

  1. GRB110205A: EVLA Observations
  2. GRB 110205A: Konkoly optical observations
  3. Konus-Wind observation of GRB 110205A (correction to GCN 11659)
  4. GRB 110205A: detection of optical linear polarization from CAHA
  5. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  6. GRB 110205A: Suzaku WAM observation of the prompt emission
  7. GRB 110205A: optical observations in Mondy observatory
  8. GRB 110205A : HCT optical observations
  9. GRB 110205A - Continued PAIRITEL NIR Observations
  10. GRB 110205A: WSRT radio observation
  11. Konus-Wind observation of GRB 110205A
  12. GRB 110205A: Lightbuckets Optical Observations
  13. GRB 110205A : Lulin optical observation
  14. GRB110205A: MITSuME Ishigakijima Optical Observation
  15. GRB110205A: MITSuME Okayama Optical Observation
  16. GRB 110205A: Swift/UVOT Continuing Observations
  17. GRB 110205A: Lulin optical observations and temporal decay index
  18. Observations GRB 110205A
  19. GRB 110205A: Swift-BAT refined analysis
  20. GRB 110205A: Newcastle Observatory Optical Observations
  21. GRB 110205A: Swift-XRT refined Analysis
  22. GRB 110205A: LOAO B/R Observation
  23. GRB 110205A: optical flare confirmation
  24. GRB 110205A: NOT redshift confirmation
  25. GRB 110205A: Enhanced Swift-XRT position
  26. GRB 110205A: FAST Redshift
  27. GRB 110205A: GRAS005 optical observations
  28. GRB 110205A: PAIRITEL NIR Afterglow Detection
  29. GRB 110205A: Possible Lick/Kast redshift
  30. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  31. GRB 110205A: Liverpool Telescope Afterglow Confirmation
  32. GRB 110205A: TAROT Calern observatory detection of an optical flare
  33. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  34. GRB 110205A: TAROT Calern observatory optical detection
  35. GRB 110205A: Swift detection of a burst with an optical candidate

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