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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"

37 results found.

  1. GRB 130831A: MASTER early OT detection and LC
  2. GRB 130831A: Continued RATIR Optical and NIR Observations
  3. GRB 130831A: VLT/FORS2 spectroscopic detection of a supernova
  4. GRB 130831A: Continued RATIR Optical and NIR Observations
  5. GRB 130831A: RTT150 optical observations
  6. GRB 130831A: RATIR Confirmation of NIR/Optical Afterglow Flattening
  7. GRB 130831A: Maidanak optical observations, possible emerging Supernova
  8. GRB 130831A: Maidanak optical observations
  9. GRB 130831A: optical observation in Chuguev AO
  10. GRB 130831A: ISON-Kislovodsk optical observations
  11. GRB 130831A: optical observation in Gissar AO
  12. GRB 130831A: ISON-UAFO optical observations
  13. GRB 130831A: RATIR Optical and NIR Upper Limits
  14. GRB 130831A: JCMT SCUBA-2 sub-mm observation
  15. GRB 130831A: Swift/UVOT Observations
  16. GRB 130831A: Montarrenti Observatory optical follow-up
  17. GRB 130831A: Optical Observations via Virtual Telescope, follow-up
  18. GRB 130831A: RATIR Optical and NIR Observations
  19. GRB 130831A: Continued Skynet/PROMPT-SSO, PROMPT-CTIO and Yerkes-41 detections
  20. GRB 130831A: VLA Observations
  21. GRB 130831A: T100 observations
  22. GRB 130831A: CARMA mm upper limit
  23. GRB 130831A: THO optical observation
  24. GRB 130831A, Swift-BAT refined analysis
  25. GRB 130831A: optical observations
  26. GRB 130831A: Optical Observations via Virtual Telescope
  27. GRB 130831A: Swift-XRT refined Analysis
  28. GRB 130831A: Montarrenti Observatory optical observations
  29. GRB 130831A: Skynet/PROMPT-SSO detections
  30. GRB 130831A: Enhanced Swift-XRT position
  31. GRB 130831A : Xinglong 60cm optical observation
  32. Konus-Wind observation of GRB 130831A
  33. GRB 130831A: Gemini-North Redshift
  34. GRB 130831A: MITSuME Akeno Optical observation
  35. GRB 130831A: Weihai optical observations
  36. GRB 130831A: Faulkes Telescope North and South optical afterglow
  37. GRB 130831A: Swift detection of a burst with an optical counterpart

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