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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. 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"

11847 results found.

  1. GRB990323 PRECISE IPN POSITION
  2. GRB990321 IPN TRIANGULATION
  3. GRB990308, Possible new SGR~0209+70
  4. GRB 981220, radio observations
  5. BATSE Flight Anomaly
  6. Optical Observations of GRB990217
  7. GRB 990123: Continued Radio Observations
  8. Search for Potential Images of GRB 990123
  9. "GRB 990123: New BV Observations"
  10. GRB 990123: BATSE Observations
  11. GRB990123 Optical Observation
  12. GRB990123, BeppoSAX-NFI X-ray afterglow detection
  13. GRB 980613: Spectroscopy of the host galaxy
  14. GRB 981226 optical observations
  15. GRB981226, BeppoSAX-NFI follow-up
  16. GRB 981220: BeppoSAX/GRBM results
  17. GRB 981220: RXTE/ASM and BeppoSAX/GRBM results
  18. GRB 980923 BATSE Observations
  19. GRB980703 optical photometry
  20. GRB 980703: BATSE Observations
  21. GRB980703: LOTIS observation at early times
  22. GRB980519 observation report
  23. GRB980703 optical followup
  24. Radio observations of SGRs
  25. GRB 980613: BATSE Observations
  26. Discovery of a new SGR source, SGR1627-41
  27. SGR1900+14
  28. SGR1900+14
  29. BATSE on-board GRB trigger change
  30. GRB 980519 Optical Observations
  31. GRB980519 BATSE Observations
  32. GRB970519, optical follow-up at Schmidt Calern
  33. GRB980519 optical observations
  34. GRB 980519 Optical Observations
  35. GRB980519, BeppoSAX-WFC updated position
  36. GRB980519, BeppoSAX-WFC position
  37. GRB 980425 Radio Light Curve
  38. GRB980425 BATSE observations
  39. GRB 980329 ROSAT observation
  40. GRB980329 optical observations
  41. GRB980329 optical observations
  42. GRB980329 optical observations
  43. GRB 971227: Optical Observations
  44. GRB971227: LOTIS observations
  45. GRB 971214: EUVE Observations
  46. GRB 971024: USNO Observations
  47. Possible new SGR from US Naval Observatory

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Download all Circulars as a .tar.gz archive (updated once a day):
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