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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"

11845 results found.

  1. IPN Triangulation of GRB 111205A (long/hard/intense)
  2. GRB 111204A: TNG NIR observations
  3. GRB 111204A: Swift-XRT refined Analysis
  4. GRB 111022B: CrAO optical limit
  5. GRB 111123A: optical upper limit in CrAO: correction to the GCN circ. 12613
  6. GRB 111123A: optical upper limit in CrAO
  7. GRB 111204A: Swift detection of a burst
  8. GRB111201A: Swift-XRT observations
  9. GRB 111201A found in ground analysis of BAT data
  10. GRB 111129A: Swift/UVOT Detection
  11. GRB 111129A, GROND afterglow observations
  12. GRB 111129A: Swift-XRT refined Analysis
  13. GRB 111129A: Swift detection of a burst with an optical counterpart
  14. GRB 111123A: TNG NIR detection of the afterglow candidate
  15. GRB 111123A: Swift-XRT refined Analysis
  16. GRB 111123A: GMG optical observation
  17. GRB 111123A: Swift detection of a burst
  18. Konus-Wind observation of GRB 111121A
  19. GRB 111117A: Chandra detection of the afterglow
  20. GRB 111117A: Gemini Afterglow Limits
  21. GRB 111117A: Swift-XRT refined Analysis
  22. GRB 111117A: NOT observations
  23. GRB 111117A: Chandra ToO observation scheduled
  24. GRB 111117A: Swift detection of a short hard burst
  25. Konus-Wind observation of GRB 111113A
  26. XRF 111111A/MAXI J0158-744: MAXI GSC and SSC detection of a soft X-ray transient near SMC
  27. GRB 111109A: Swift-BAT refined analysis
  28. GRB 111109A: Swift detection of a burst
  29. GRB 111107A: Swift-XRT refined Analysis
  30. GRB 111107A: Swift detection of a burst with an optical counterpart
  31. Konus-Wind observation of GRB 111103B
  32. GRB 111103B: Swift-XRT refined Analysis
  33. GRB 111103B: optical observations from TAU, Ka-Dar
  34. GRB 111103A: Swift-BAT refined analysis
  35. GRB 111022B: MASTER OT observations
  36. GRB 111103B: Swift detection of a strong burst from a GRB or Galactic source
  37. GRB 111103A: Swift detection of a burst
  38. GRB 111029A: Super-LOTIS early limits
  39. GRB 111029A: KAIT optical limits
  40. GRB 111029A: ROTSE-III Optical Limits
  41. GRB 111029A: Swift detection of a burst
  42. GRB 111024A: MAXI/GSC detection of a burst
  43. GRB 111022B: Swift-XRT refined Analysis
  44. GRB 111022B: MITSuME Akeno Optical upper limits
  45. GRB 111022B: Swift detection of a burst
  46. GRB 111020A: Swift-XRT refined Analysis
  47. GRB 111020A: Faulkes Telescope South observations
  48. GRB 111020A: Planned XMM-Newton observation
  49. GRB 111020A: Swift detection of a short burst
  50. Konus-Wind observation of GRB 111016B
  51. GRB 111016A: Swift-XRT refined Analysis
  52. Konus-Wind observation of GRB 111008A
  53. GRB 111008A: Swift-XRT refined Analysis
  54. GRB 111005A: Swift-BAT refined analysis
  55. GRB 111005A: Swift detection of a burst
  56. Trigger 504307: Swift detection of MAXI J1836-194
  57. GRB 110928A: Swift-XRT refined Analysis
  58. GRB 110928A: Swift-XRT observations
  59. GRB 110928A: ROTSE-III Optical Limits
  60. GRB 110924A: Swift detection of a possible burst
  61. GRB 110921A: Swift detection of a burst
  62. GRB 110918A optical observation
  63. GRB 110918A: Gemini-N redshift
  64. GRB 110918A: GROND detection of the afterglow candidate
  65. GRB 110918A: INT optical detection of Swift candidate afterglow
  66. GRB 110918A: Swift-XRT observations
  67. Konus-Wind observation of GRB 110918A
  68. GRB110918A: BOOTES-1 optical limit
  69. MAXI/GSC detection of a short soft X-ray transient
  70. GRB 110915A: Konus-Wind and Swift/BAT joint spectral analysis
  71. IPN triangulation of GRB 110918A (long duration, extremely intense)
  72. GRB 110915A: Swift-XRT refined Analysis
  73. GRB 110915B: XRT afterglow candidate
  74. GRB 110915B: SuperAGILE localization of a long GRB
  75. GRB 110915A: Prompt enhanced Swift-XRT position
  76. GRB 110915A: Swift detection of a burst
  77. GRB 110903A: Swift-XRT observations
  78. Konus-Wind observation of GRB 110903A
  79. GRB 110820A: optical upper limit
  80. Trigger 502024: Swift detection of KS 1741-293
  81. GRB110825A: ROTSE early time optical limit
  82. GRB110825A: Swift target of opportunity observation
  83. IPN triangulation of GRB110825A (very intense, long-duration)
  84. Konus-Wind observation of GRB 110820B
  85. GRB 110820A: MASTER-NET first hour observations
  86. IPN triangulation of GRB 110820B (very long duration, extremely intense)
  87. GRB 110820A: CrAO optical upper limit
  88. GRB 110820A: MASTER-NET observations
  89. GRB 110820A: Swift detection of a burst
  90. GRB 110818A: Fermi GBM observation
  91. GRB 110818A: Swift-XRT refined Analysis
  92. GRB 110815A : Suzaku WAM observation of the prompt emission
  93. GRB 110818A: Swift detection of a burst
  94. Konus-Wind observation of GRB 110815A
  95. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  96. GRB 110812A: SuperAGILE localization of a long GRB.
  97. SGR 1834.9-0846/ GRB 110807A, I-band observations
  98. Konus-Wind observation of GRB 110808B
  99. Konus-Wind observation of GRB 110808A
  100. GRB 110808A: Swift/UVOT Detection

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