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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"

24428 results found.

  1. GRB 100413A: GROND Upper limits
  2. Konus-Wind observation of GRB 100413A
  3. GRB 100413A: Faulkes Telescope South observations
  4. Tentative redshift of GRB100413A from X-ray data
  5. GRB 100413A: Swift-BAT initial refined analysis
  6. GRB 100413: xinglong TNT optical upper limit
  7. GRB 100413A: MASTER-Net optical observations
  8. GRB 100413A: Swift detection of a burst
  9. Trigger 419015 is probably not a GRB
  10. INTEGRAL Alert n. 5995: MASTER-Net optical observations
  11. MASTER observations on the Swift second trigger on LS V +44 17
  12. IBAS Alert n. 5996: not a GRB
  13. IBAS Alert n. 5995: not a GRB
  14. GRB 100331B: GROND Upper limits
  15. Master-Net observations on the Swift trigger on LS V +44 17
  16. GRB 100401A: Fermi GBM detection
  17. GRB 100316A: R-band limit
  18. GRB 100324B: Suzaku WAM observation of the prompt emission
  19. GRB 100331B: SuperAGILE Localization of a Long GRB
  20. Konus-Wind observation of GRB 100324B
  21. GRB 100331A: A long GRB detected by INTEGRAL
  22. Fermi GBM detection of four Solar Flares
  23. GRB 100322A: Suzaku WAM observation of the prompt emission
  24. Fermi/GBM and Swift/BAT detection of a burst from SGR 1806-20
  25. GRB 100325A: Fermi LAT detection
  26. GRB 100325A: Fermi GBM detection
  27. GRB 100316D: Spectroscopic Discovery of a Supernova from Magellan
  28. GRB 100322A: Fermi GBM detection
  29. Possible pulsation period in SGR 1833-0832
  30. GRB 100319A: correction to GCN 10527
  31. Swift-XRT refined position of the probable new SGR 1833-0832
  32. Swift-BAT refined analysis of the probable new SGR 1833-0832
  33. GRB 100219A: MASTER-Net optical alert observations
  34. GRB 100319A: Swift detection of a burst; possible SGR
  35. GRB 100316D: Possible Supernova
  36. GRB 100316D: Pre-burst emission measured by BAT
  37. GRB 100316D: Swift XRT enhanced position and further refined analysis
  38. Tentative redshift of GRB100316D from X-ray data
  39. GRB 100316D: Swift-BAT refined analysis
  40. GRB 100316C: Swift-BAT refined analysis
  41. GRB 100316D: Swift XRT refined analysis
  42. GRB 100316A: Swift-BAT refined analysis
  43. GRB 100316B: Swift-BAT refined analysis
  44. Trigger 416140 is almost certainly not a GRB
  45. GRB 100316B: VLT/X-shooter redshift
  46. GRB 100316B: Skynet/PROMPT Observations of Fading
  47. GRB 100316C: Swift detection of a burst
  48. GRB 100316A: Swift detection of a burst
  49. IBAS Alert 5992 is not a GRB, but XTE J1855-026
  50. GRB100305A: Optical upper limits at IAO
  51. GRB 100305A: Super-LOTIS early observations
  52. GRB100302A : LOAO observations and Lulin afterglow analysis
  53. GRB 100305A, Swift-BAT refined analysis
  54. GRB 100305A: Gemini z'-band observation
  55. GRB 100305A: PAIRITEL NIR Upper Limits
  56. GRB 100305A: Swift detection of a burst
  57. GRB 100302A: Swift-XRT refined analysis
  58. GRB 100302A: MASTER-Net optical alert observations
  59. GRB 100302A, Swift-BAT refined analysis
  60. GRB 100302A: Skynet/DAO Observations
  61. GRB 100302A: Swift detection of a burst
  62. GRB 100224B: Fermi GBM detection
  63. GRB 100225A: Fermi LAT detection
  64. GRB 100225A: Fermi GBM detection
  65. GRB 100223A: Fermi GBM detection
  66. GRB
  67. GRB 100219A: VLT/X-shooter redshift
  68. GRB 100216A: XRT Refined Analysis
  69. GRB 100219A: Swift-BAT refined analysis
  70. GRB 100218A : Fermi GBM detection
  71. GRB 100216A Short, hard GRB detected in ground analysis of Swift-BAT data
  72. GRB 100213A: Swift-BAT lag analysis indicates probably SHB
  73. GRB 100213A: Swift-BAT refined analysis
  74. GRB 100213B: PAIRITEL NIR Upper Limits
  75. GRB 100213B: Swift-BAT refined analysis
  76. GRB 100213A: Swift XRT refined analysis
  77. GRB 100213A: Swift detection of a burst
  78. GRB 100212A: Fermi GBM detection
  79. GRB 100212A: Swift-BAT refined analysis
  80. GRB 091127: Detection of a Supernova
  81. GRB 100205A: Keck limits on an underlying host galaxy
  82. GRB 100205B: Fermi GBM detection
  83. GRB 100206A: GROND upper limits
  84. GRB 100131A: MASTER-Net optical alert observations
  85. GRB 100206A: YNAO-GMG observations
  86. GRB 100206A: MASTER-Net optical alert observations
  87. GRB 100206A: PAIRITEL Photometry of Host Candidate
  88. GRB 100206A: WHT candidate afterglow
  89. GRB 100206A, RIMOTS optical upper limits
  90. GRB 100205A: GROND upper limits
  91. GRB 100206A: Fermi GBM observation
  92. GRB 100206A: Swift-BAT refined analysis
  93. GRB 100206A: Swift detection of a short hard burst
  94. GRB 100205A: Gemini-N + NIRI photometry
  95. GRB 100130B: Fermi GBM detection
  96. GRB 100113A: Fermi GBM detection
  97. GRB 100205A: Swift-BAT refined analysis
  98. GRB 100205A: Swift XRT refined analysis
  99. GRB 100205A: Gemini-South Observations
  100. GRB 100131A: Suzaku WAM observation of the prompt emission

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