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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"
  1. GRB 980519 Optical Observations
  2. GRB980519 optical observations
  3. GRB980519 I-band observations
  4. GRB 980519
  5. GRB980519 optical observations
  6. GRB 980519 Optical Observations
  7. GRB980519 BATSE Observations
  8. GRB970519, optical follow-up at Schmidt Calern
  9. GRB980519 optical observations
  10. GRB980519 Optical Observations
  11. GRB980519 Optical Observations
  12. GRB980519 IPN POSITION
  13. GRB980519 Optical Observations
  14. GRB 980519 Optical Observations
  15. GRB980519 optical observations
  16. GRB980515, BeppoSAX IAUC to be submitted
  17. BATSE on-board GRB trigger change
  18. GRB980519, BeppoSAX-WFC updated position
  19. GRB980519, BeppoSAX-WFC position
  20. GRB980515: SAX-WFC updated position
  21. BeppoSAX GRB ALERT: updated position of grb980515
  22. GRB 980425 Radio Light Curve
  23. GRB 980425 Brightness Temperature
  24. BSAX Observations of GRB980425 field
  25. IPN web site of GRBs
  26. GRB980425 BATSE observations
  27. SAX J0840.7+2248 Optical Observations
  28. GRB 980425 optical observations
  29. GRB980425: optical obs.
  30. GRB980425: Radio Observations
  31. GRB 980425 optical observations
  32. report on BSAX observations of GRB980425
  33. GRB 980425 optical observations
  34. GRB 980329 ROSAT observation
  35. GRB980326 X-ray Observations
  36. GRB980326, optical observations
  37. GRB980326, optical observations
  38. GRB980329, Fading IR counterpart to radio source
  39. GRByymmdd, Announcement of automation
  40. GRB980326 IPN annulus
  41. GRB980329
  42. GRB980329 Keck K-band observations
  43. GRB980329 sub-millimeter observations
  44. GRB980329 IPN annulus
  45. GRB980329 optical observations
  46. GRB980329 near-IR observations
  47. GRB980329 near-IR observations
  48. GRB980329 optical observations
  49. GRB980329 infrared observations
  50. GRB980329 optical observations
  51. GRB980326 optical observations
  52. GRB980329 optical observations
  53. GRB980329 VLA observations
  54. GRB980329 near IR observations
  55. GRB980329 optical observations
  56. GRB980329 optical observations
  57. GRB980329 optical observations
  58. GRB980326 optical observations
  59. GRB980326 optical observations
  60. GRB980326 optical observations
  61. GRB980326 optical observations
  62. GRB970508 SAO RAS optical observations
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