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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"

22 results found.

  1. GRB 171205A: Host galaxy photometric properties
  2. GRB 150518A: possible SN observations
  3. GRB 150518A: Continued RATIR optical observations
  4. GRB 150518A: MAXI-GSC further analysis
  5. GRB 150518A: 6.0 GHz VLA detection
  6. GRB 150518A: MITSuME Akeno Optical observation
  7. GRB 150518A: Mondy optical observations
  8. GRB 150518A: AMI 15 GHz detection of possible radio counterpart
  9. GRB 150518A: MASTER-net before, early and after optical stereoscopic observations with possible MP discovery inside MAXI error box
  10. Konus-Wind observation of GRB 150518A
  11. GRB 150518A: Swift-XRT follow-up observations
  12. GRB 150518A : Xinglong TNT upper limit
  13. GRB 150518A: SAO RAS optical observations
  14. GRB 150518A: Correction
  15. GRB 150518A: VLT/X-shooter redshift of the likely host galaxy
  16. GRB 150518A: RATIR optical observations
  17. GRB 150518A: GMG observation
  18. GRB 150518A: Xinglong2.16m optical afterglow detection
  19. Swift/UVOT observations of GRB150518A
  20. GRB 150518A: Swift-XRT afterglow detection
  21. GRB 150518A: Tiled Swift observations
  22. GRB 150518A: MAXI/GSC detection

Advanced

Download all Circulars as a .tar.gz archive:
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