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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"

11612 results found.

  1. GRB 111117A: Fermi GBM observation
  2. GRB 111107A: Fermi GBM observation
  3. GRB 111103A: Fermi GBM observation
  4. GRB 111017A: Fermi GBM Detection
  5. GRB 111003A: Fermi GBM detection
  6. Fermi GBM triggers 110923481, 110924391 and 110925200 are not GRBs
  7. GCN for GRB 110921B
  8. GRB 110921A: Fermi GBM observation
  9. IPN triangulation of GRB 110918A (long duration, extremely intense)
  10. GRB 110903A: Fermi GBM observation
  11. GRB110825A: Fermi GBM observation
  12. GRB110825A: ROTSE early time optical limit
  13. IPN triangulation of GRB110825A (very intense, long-duration)
  14. Fermi GBM trigger 110823.518 is not a GRB
  15. GRB 110818A: Fermi GBM observation
  16. Fermi Gamma-ray Burst Monitor trigger 110809.346 is not a GRB
  17. Swift SGR 1834.9-0846: Swift-BAT refined analysis
  18. Fermi GBM detection of a SGR-like burst
  19. Fermi Gamma-ray Burst Monitor trigger 110806.263 is not a GRB
  20. Fermi GBM trigger 334123030 (110804165) is not a GRB
  21. EVLA observation for Fermi burst GRB 110721A
  22. GRB 110731A : Suzaku WAM observation of the prompt emission
  23. AXP 4U 0142+61: Fermi GBM detection
  24. Konus-Wind observation of GRB 110731A
  25. GRB 110731A: Fermi GBM observation
  26. Fermi-LAT Detection of GRB110731A
  27. GRB 110721A: Swift observations of afterglow candidate
  28. IPN triangulation of GRB 110721A
  29. GRB 110721A: Preliminary Swift/UVOT Upper Limits
  30. GRB 110721A: potential counterpart candidate
  31. Konus-Wind observation of GRB 110721A
  32. GRB 110721A: Fermi-LAT detection
  33. GRB 110721A: Fermi GBM detection
  34. Swift J1822.3-1606 : Fermi GBM observation
  35. Swift J1822.3-1606: A Probable New SGR in Ground Analysis of BAT Data
  36. Fermi Gamma-ray Burst Monitor trigger 332078586 is not a GRB
  37. GRB 110709A: Fermi GBM observation
  38. GRB 110705A: Suzaku WAM observation of the prompt emission
  39. Konus-Wind observation of GRB 110705A
  40. IPN triangulation of short hard GRB 110705A
  41. GRB 110705A: Fermi GBM detection
  42. GRB 110625A: Suzaku WAM observation of the prompt emission
  43. GRB 110625A: Fermi GBM and LAT observations
  44. GRB 110625A: Fermi LAT detection
  45. IPN triangulation of GRB110618A (long duration, extremely intense)
  46. Fermi Gamma-ray Burst Monitor trigger 110621949 is not a GRB
  47. GRB 110610A: Fermi GBM detection
  48. GRB 110529A: Fermi GBM detection
  49. Konus-Wind observation of GRB 110529A
  50. LAT Observations of GRB110529A
  51. Fermi Gamma-ray Burst Monitor trigger 328195911 is not a GRB
  52. Radio observations of GRB 110428A with the EVLA
  53. GRB 110426A: Fermi GBM detection
  54. GRB 110428A: Fermi-GBM observation
  55. GRB 110428A: Suzaku WAM observation of the prompt emission
  56. Fermi-GBM data processing and delivery
  57. GRB 110428A : Swift-XRT observations
  58. Konus-Wind observation of GRB 110428A
  59. GRB 110428A: Fermi-LAT Detection
  60. GRB 110426A: MASTER synchronous with MAXI/GSC observations
  61. GRB 110420B: Fermi GBM observation
  62. GRB 110412A: Fermi GBM observation
  63. ICSP VLF observation of multiple SGR-like bursts from 1E 1841-045 on Feb. 9, 2011
  64. GRB 110401A: Fermi GBM detection
  65. GRB 110402A: Fermi GBM detection
  66. GRB 110402A: early optical limit by "Pi of the Sky"
  67. GRB110328A/Swift J164449.3+573451: Fermi LAT Observations
  68. GRB 110328/Swift J164449.3+573451: Fermi observations
  69. GRB 110328B: Fermi-LAT Detection
  70. GRB 110328B: Fermi GBM detection
  71. Fermi Gamma-ray Burst Monitor trigger 322686470 (110324797) is not a GRB
  72. GRB 110319B: Swift/UVOT Upper Limits
  73. GRB 110319B: GROND upper limits
  74. GRB 110319B found in ground analysis of Swift-BAT data
  75. GRB 110318A: Fermi GBM detection
  76. Fermi GBM trigger 321944155 (110316205) is not a GRB
  77. GRB 110301A: Fermi GBM detection
  78. No IPN GRB detected in conjunction with candidate GRB 110215
  79. Fermi GBM detection of an SGR-like burst
  80. Fermi GBM trigger 319534757 (110216319) is not a GRB
  81. GRB 110213A: Fermi GBM observation
  82. Fermi GBM detection of a burst from 1E 1841-045
  83. GRB 110207A: Fermi GBM observation
  84. GRB 110128A: Fermi GBM detection
  85. GRB 110125A: Fermi GBM detection
  86. GRB 110120A: Suzaku WAM observation of the prompt emission
  87. Konus-Wind observation of GRB 110120A
  88. GRB 110123A: Fermi GBM detection
  89. GRB 110106B, radio observations
  90. GRB 110120A: MASTER optical observations
  91. GRB 110120A: Fermi LAT detection
  92. IPN triangulation of GRB 110120A
  93. GRB 110119A: Fermi GBM detection
  94. GRB 110120A: Fermi GBM detection
  95. GRB 110120A: MASTER optical observations
  96. New feature in Fermi GBM GRB Ground Position Notices
  97. GRB 110112B: Fermi GBM observation
  98. GRB 110107A: Swift-XRT Afterglow Candidate
  99. GRB 110107A detected in ground analysis of BAT slew data
  100. GRB 110106B: Fermi GBM detection

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