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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"

19321 results found.

  1. GRB 081101B: Fermi GBM detection
  2. Radio observation of GRB 080516 with ATCA
  3. GRB 081025: Fermi GBM observation
  4. GRB 081104: refined XRT analysis
  5. GRB 081104: Swift-BAT refined analysis
  6. Radio observation of GRB 080130 with ATCA
  7. GRB 081102: MASTER prompt optical limit
  8. GRB 081102: Swift-XRT refined analysis
  9. GRB 081102: Swift-BAT refined analysis
  10. Radio observation of GRB 080218b with ATCA
  11. Radio observation of GRB 080229a with ATCA
  12. GRB 081102: Swift detection of a burst
  13. SGR 0623-0006 or GRB 081101: Swift-XRT refined analysis
  14. SGR 0623-0006 or GRB 081101: Swift-BAT/-XRT refined analysis
  15. GRB 081024B: new Swift-XRT observations
  16. Radio observation of GRB 080229b with ATCA
  17. GRB 081029: Swift-BAT refined analysis
  18. GRB081029: Swift XRT refined analysis
  19. GRB 081025: Suzaku WAM observation of the prompt emission
  20. GRB 081024B: Suzaku WAM observation of the prompt emission
  21. Radio observation of GRB 080303 with ATCA
  22. Radio observation of GRB 080411 with ATCA
  23. GRB 081029: ROTSE-III Detection of Optical Counterpart
  24. GRB 081028B: Fermi GBM detection
  25. GRB 081021: Fermi GBM detection
  26. GRB 081028: Swift-XRT refined analysis
  27. GRB 081028, Swift-BAT refined analysis
  28. Fermi LAT/GBM short-hard GRB 081024B: Possible TLS Afterglow (Corrected)
  29. Fermi LAT/GBM short-hard GRB 081024B: Possible TLS Afterglow
  30. GRB 081028: Swift detection of a burst
  31. GRB 081024B: Swift-XRT further observations
  32. GRB 081025 BAT refined analysis
  33. Swift UVOT observations of GRB081024B
  34. Konus-Wind observation of GRB 081025
  35. GRB 081024B: Swift-XRT observations
  36. GRB 081024B: Fermi Gamma-ray Burst Monitor detection
  37. GRB 081024: Swift-XRT refined analysis
  38. GRB 081024, Swift-BAT refined analysis
  39. GRB 081024: Enhanced Swift-XRT position
  40. GRB 081024: Faulkes Telescope North optical observations
  41. GRB 081022, Swift-BAT refined analysis
  42. GRB 081016A: Swift-XRT refined analysis
  43. GRB 081017, Swift-BAT refined analysis
  44. GRB 081016B, Swift-BAT refined analysis
  45. GRB 081016B: Swift-XRT Team refined Analysis
  46. GRB 081016B: Enhanced Swift-XRT position
  47. GRB 081011: Enhanced Swift-XRT position
  48. GRB 081016: A long GRB discovered by INTEGRAL
  49. GRB 081009: Fermi GBM detection
  50. GRB 081012: Fermi GBM detection
  51. GRB 081007 and GRB 081007B: Fermi GBM detection
  52. GRB 080430: optical observations
  53. GRB 081012, Swift-BAT refined analysis
  54. GRB 081011, Swift-BAT refined analysis
  55. GRB 081008, Swift-BAT refined analysis
  56. GRB 081008: Swift-XRT Refined Analysis
  57. GRB 081008: Swift detection of a burst with optical afterglow
  58. GRB 081008: ROTSE-III Detection of Optical Counterpart
  59. GRB081006B: Fermi GBM detection
  60. GRB081006: Fermi GBM detection
  61. GRB 081007, Swift-BAT refined analysis
  62. GRB 081007: Swift-XRT Team refined analysis
  63. GRB 081007, Faulkes Telescope North optical observations
  64. GRB 081007: Swift detection of a burst with optical afterglow
  65. GRB081003C: GLAST Burst Monitor detection
  66. GRB 081003B: Swift-XRT upper limit
  67. AXP 1E1547.0-5408: Swift-XRT Team refined analysis
  68. GRB 081003A: Swift-XRT Team position and analysis
  69. GRB 081003B: a long GRB detected with INTEGRAL
  70. GRB 080928: Fermi GBM detection
  71. GRB 081003: A long GRB discovered by INTEGRAL
  72. GRB 080925: Suzaku WAM observation of the prompt emission
  73. GRB081001: SuperAGILE Localization of a long GRB
  74. GRB 080927: Fermi GBM detection
  75. GRB 080928: VLT redshift
  76. GRB 080928: Swift-XRT refined analysis
  77. GRB 080928, Swift-BAT final refined analysis
  78. GRB 080928, Swift-BAT initial refined analysis
  79. GRB 080928A: ROTSE-III Confirmation of Optical Counterpart
  80. GRB 080928: Swift detection of a burst with an optical counterpart
  81. GRB 080925: Fermi GBM Detection
  82. GRB 080920: Fermi GBM detection
  83. GRB080922, optical upper limit
  84. Swift trigger 325707: Swift-XRT upper limit
  85. GRB080916A: Suzaku WAM observation of the prompt emission
  86. GRB080922: Swift-XRT upper limit
  87. GRB080922: A long GRB detected by INTEGRAL
  88. GRB 080913B: Fermi GBM detection
  89. GRB 080919: Swift-XRT refined analysis
  90. GRB 080919, Swift-BAT refined analysis
  91. GRB 080919: Swift detection of a short burst
  92. SGR 0501+4516: preliminary results of the Suzaku ToO observation
  93. GRB 080916A: Fermi GBM detection
  94. GRB 080916C: Swift XRT refined analysis
  95. GRB 080916B: Swift-XRT refined analysis
  96. Konus-Wind observation of GRB 080916A
  97. GRB 080913: Konus-Wind and Swift/BAT joint spectral analysis
  98. GRB 080916C: Enhanced XRT position
  99. GRB080916A: Spectroscopic redshift
  100. GRB 080916B, Swift-BAT refined analysis

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