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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"

24 results found.

  1. GRB 140311A: Mondy optical limits
  2. GRB 140311A: VLA Detection
  3. GRB 140311A: further NOT observations
  4. GRB 140311B: Swift-BAT refined analysis
  5. GRB 140311A: RATIR Optical and NIR Detection
  6. GRB 140311A: Montarrenti Observatory optical upper limit
  7. GRB 140311A: Kottamia I-band observation
  8. GRB 140311A: Swift/UVOT Upper Limits
  9. GRB 140311A: Bassano Bresciano Observatory optical upper limit
  10. GRB 140311A: Swift-XRT refined Analysis
  11. GRB 140311A: Gemini-North redshift
  12. GRB 140311A: NOT redshift confirmation
  13. GRB 140311A: Swift-BAT refined analysis
  14. GRB 140311A: Gemini-South redshift
  15. GRB 140311A: Enhanced Swift-XRT position
  16. GRB 140311A: Recalibration of photometry of OT detected with Kottamia 188cm telescope
  17. GRB 140311A: Nanshan afterglow decay
  18. GRB 140311A: Optical follow-up observation with Kottamia 188cm telescope
  19. GRB 140311A: NOT observations of the optical afterglow
  20. GRB 140311A: Zadko observatory - Gingin optical observations
  21. GRB 140311A: Nanshan OT detection
  22. GRB 140311A: MASTER early optical observations
  23. GRB 140311B: Swift detection of a burst
  24. GRB 140311A: Swift detection of a probable burst

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