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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"

20 results found.

  1. GRB 190627A: Discovery Channel Telescope late time observations
  2. GRB 190627A: VLT/FORS2 spectroscopic redshift
  3. GRB 190627A: Koshka Zeiss-1000 optical counterpart observations
  4. GRB 190627A : Xinglong 2.16m optical observation
  5. GRB 190627A: Swift-XRT refined Analysis
  6. GRB 190627A: GMG observation at the second epoch
  7. GRB 190627A: NOT optical observations
  8. GRB 190627A: Optical imaging by D50 from Ondrejov
  9. GRB 190627A: NIR imaging from Liverpool Telescope
  10. GRB 190627A: Optical imaging and spectroscopy from Calar Alto
  11. GRB 190627A: NUTTelA-TAO optical counterpart observations
  12. GRB 190627A: Swift-BAT refined analysis (short-soft burst)
  13. GRB 190627A: GMG observation
  14. GRB 190627A: MASTER optical counterpart observation
  15. GRB190627A: VIRT Afterglow observation
  16. GRB 190627A: Montarrenti Observatory optical detection
  17. GRB 190627A: NUTTelA-TAO optical observations
  18. GRB 190627A: Enhanced Swift-XRT position
  19. GRB 190627A: Swift/UVOT Detection
  20. GRB 190627A: Swift detection of a burst

Advanced

Download all Circulars as a .tar.gz archive:
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