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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"

11552 results found.

  1. GRB 110420B: Fermi GBM observation
  2. GRB 110412A: Fermi GBM observation
  3. ICSP VLF observation of multiple SGR-like bursts from 1E 1841-045 on Feb. 9, 2011
  4. GRB 110401A: Fermi GBM detection
  5. GRB 110402A: Fermi GBM detection
  6. GRB 110402A: early optical limit by "Pi of the Sky"
  7. GRB110328A/Swift J164449.3+573451: Fermi LAT Observations
  8. GRB 110328/Swift J164449.3+573451: Fermi observations
  9. GRB 110328B: Fermi-LAT Detection
  10. GRB 110328B: Fermi GBM detection
  11. Fermi Gamma-ray Burst Monitor trigger 322686470 (110324797) is not a GRB
  12. GRB 110319B: Swift/UVOT Upper Limits
  13. GRB 110319B: GROND upper limits
  14. GRB 110319B found in ground analysis of Swift-BAT data
  15. GRB 110318A: Fermi GBM detection
  16. Fermi GBM trigger 321944155 (110316205) is not a GRB
  17. GRB 110301A: Fermi GBM detection
  18. No IPN GRB detected in conjunction with candidate GRB 110215
  19. Fermi GBM detection of an SGR-like burst
  20. Fermi GBM trigger 319534757 (110216319) is not a GRB
  21. GRB 110213A: Fermi GBM observation
  22. Fermi GBM detection of a burst from 1E 1841-045
  23. GRB 110207A: Fermi GBM observation
  24. GRB 110128A: Fermi GBM detection
  25. GRB 110125A: Fermi GBM detection
  26. GRB 110120A: Suzaku WAM observation of the prompt emission
  27. Konus-Wind observation of GRB 110120A
  28. GRB 110123A: Fermi GBM detection
  29. GRB 110106B, radio observations
  30. GRB 110120A: MASTER optical observations
  31. GRB 110120A: Fermi LAT detection
  32. IPN triangulation of GRB 110120A
  33. GRB 110119A: Fermi GBM detection
  34. GRB 110120A: Fermi GBM detection
  35. GRB 110120A: MASTER optical observations
  36. New feature in Fermi GBM GRB Ground Position Notices
  37. GRB 110112B: Fermi GBM observation
  38. GRB 110107A: Swift-XRT Afterglow Candidate
  39. GRB 110107A detected in ground analysis of BAT slew data
  40. GRB 110106B: Fermi GBM detection
  41. GRB 110102A: Fermi GBM observation
  42. GRB 101224A: Fermi GBM observation
  43. GRB 101219B: Fermi GBM observation
  44. GRB 101213A: Fermi GBM observation
  45. GRB 101129A SHB found by IPN and in ground analysis of BAT data
  46. GRB 101201A: Fermi GBM observation
  47. GRB 101201A: GROND Detection of the Optical/NIR Afterglow
  48. GRB 101201A detected in ground analysis of BAT data
  49. GRB 101123A: ROTSE optical observations
  50. GRB 101123A: MASTER prompt optical observations
  51. Konus-Wind observation of GRB 101123A
  52. IPN triangulation of bright GRB 101123A
  53. GRB 101123A: Fermi GBM detection
  54. Fermi GBM detection of a burst from a galactic source
  55. GRB 101112A: Fermi GBM detection
  56. GRB 101024A: Fermi GBM observation
  57. GRB 101023A: Fermi GBM observation
  58. GRB 101014A: Fermi LAT detection
  59. GRB 101011A: Fermi GBM detection
  60. Konus-Wind observation of GRB 101014A
  61. GRB 101014A: Fermi GBM detection
  62. GRB 101008A: Fermi GBM observation
  63. GRB 100924A: Fermi GBM observation
  64. GRB 100916A: Fermi GBM detection
  65. GRB 100915B: Fermi GBM observation
  66. GRB 100910A: Fermi GBM detection
  67. GRB 100906A: Fermi GBM observation
  68. GRB 100829A: MASTER optical observations
  69. IPN Triangulation of the very bright GRB 100829A
  70. Konus-Wind observation of GRB 100826A
  71. GRB 100829.9: MASTER Optical Limits
  72. IPN triangulation of GRB 100826A
  73. GRB100826A: Fermi-LAT Observations
  74. GRB 100814A: Suzaku WAM observation of the prompt emission
  75. GRB 100814B: Fermi GBM detection
  76. GRB 100816A: Fermi GBM observation (correction to GCN 11124)
  77. GRB 100816A: Fermi GBM observation
  78. GRB 100814A: Fermi GBM observation
  79. GRB 100802A: Fermi GBM observation
  80. GRB 100728A: Suzaku WAM observation of the prompt emission
  81. GRB 100728B: Fermi GBM observation
  82. GRB 100728A: Fermi GBM observation
  83. GRB 100727A: Fermi GBM observation
  84. GRB 100724B: AGILE/GRID analysis
  85. GRB 100724B: Suzaku WAM observation of the prompt emission
  86. Konus-Wind observation of GRB 100724B
  87. GRB 100724B: Fermi LAT and GBM analysis
  88. GRB 100724B: Fermi GBM detection
  89. GRB 100724A: Swift-BAT refined analysis
  90. GRB 100722A: Fermi GBM detection
  91. GRB 100718A: MASTER-Net optical prompt and alert observations
  92. Fermi GBM trigger 300794561 (100714419) is not a GRB
  93. GRB 100707A: Suzaku WAM observation of the prompt emission
  94. Fermi GBM trigger 300370702 (100709513) is not a GRB
  95. Konus-Wind observation of GRB 100707A
  96. IPN triangulation of GRB 100707A
  97. GRB 100707A: Fermi LAT detection
  98. GRB 100707A: Fermi GBM detection
  99. IPN triangulation of GRB 100701B
  100. GRB 100704A: Fermi GBM observation

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