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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"

33 results found.

  1. GRB 160131A: 15 GHz upper limits from AMI-LA
  2. GRB160131A: detection of polarisation by Astrosat CZTI
  3. GRB 160131A: second epoch observations with the GMRT
  4. Low frequency GMRT observations of GRB 160131A
  5. GRB 160131A: TSHAO optical observations
  6. GRB 160131A: TSHAO optical observations
  7. GRB 160131A: Mondy optcial observations
  8. GRB 160131A: RATIR Optical Observations
  9. GRB 160131A: correction to VLA position
  10. GRB 160131A: VLA detection
  11. Konus-Wind observation of GRB 160131A
  12. GRB 160131A: Optical observations from T150 OSN
  13. GRB 160131A: AbAO optical observations
  14. GRB 160131A: Mondy optical observations
  15. GRB 160131A Swift/UVOT Detection
  16. GRB 160131A: Xinglong/BFOSC spectroscopy
  17. GRB 160131A: MITSuME Ishigakijima Optical Observation
  18. GRB 160131A: GROND Detection of the Optical/NIR Afterglow
  19. GRB 160131A: GTC spectroscopy of the afterglow
  20. GRB 160131A: TNG spectroscopic observations and redshift
  21. GRB 160131A: Bassano Bresciano Observatory optical observations
  22. GRB 160131A: Swift-XRT refined Analysis
  23. GRB 160131A: Khureltogot optical observations
  24. GRB 160131A: TNG optical observations
  25. GRB 160131A: iTelescope optical observations
  26. GRB 160131A: Swift-BAT refined analysis
  27. GRB 160131A: Enhanced Swift-XRT position
  28. GRB 160131A: LCOGT-SSO optical observations
  29. GRB 160131A: RATIR Optical Observations
  30. GRB 160131A: Xinglong 60cm WFT optical observation
  31. GRB160131A: Xinglong TNT optical observation
  32. GRB 160131A: LCOGT-FTN optical afterglow observations
  33. GRB 160131A: Swift detection of a burst with an optical counterpart

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