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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"

24463 results found.

  1. GRB 111208A: Lightbuckets Optical Observations
  2. GRB 111209A, Swift-BAT refined analysis
  3. GRB 111205A: GROND observations
  4. GRB 111209A: Faulkes Telescope North observations
  5. GRB 111209A: REM NIR detection
  6. GRB 111209A: Swift detection of a long burst with an optical counterpart
  7. GRB 111208A: Swift XRT/UVOT observations
  8. GRB 111205A: Swift XRT Observations
  9. Konus-Wind observation of GRB 111205A
  10. IPN Triangulation of GRB 111205A (long/hard/intense)
  11. GRB 111204A: GROND Observations
  12. GRB 111204A, Swift-BAT refined analysis
  13. GRB 111204A: MASTER optical observations
  14. GRB 111204A: Swift detection of a burst
  15. GRB 111201A found in ground analysis of BAT data
  16. GRB 111121A: Suzaku WAM observation of the prompt emission
  17. GRB 111129A: Swift/UVOT Detection
  18. GRB 111129A, GROND afterglow observations
  19. GRB 111129A: Swift-BAT refined analysis
  20. GRB 111129A: Swift detection of a burst with an optical counterpart
  21. GRB 111123A, Swift-BAT refined analysis
  22. GRB 111123A - NOT optical observations
  23. GRB 111123A, GROND observations
  24. GRB 111123A: Swift-XRT refined Analysis
  25. GRB 111123A: MITSuME Okayama Optical upper limits
  26. GRB 111121A: Magellan/Megacam observations
  27. GRB 111121A: Swift-BAT refined analysis
  28. GRB 111117A: Chandra detection of the afterglow
  29. GRB 111117A: Fermi GBM observation
  30. GRB 111117A: further NOT observations
  31. GRB 111117A: Swift-BAT refined analysis of a short hard burst
  32. GRB 111117A: Swift detection of a short hard burst
  33. IPN Triangulation of GRB 111113A (short/hard/intense)
  34. GRB 111109A: Swift-BAT refined analysis
  35. GRB 111109A: Swift detection of a burst
  36. GRB 111107A: Fermi GBM observation
  37. GRB 111107A: Swift-XRT refined Analysis
  38. GRB 111107A: VLT/X-shooter spectroscopy
  39. GRB 111107A: Swift-BAT refined analysis
  40. GRB 111107A: GROND observations
  41. GRB 111103B: MITSuME Akeno Optical upper limits
  42. Konus-Wind observation of GRB 111103B
  43. GRB 111103A: Fermi GBM observation
  44. Trigger 506913: MASTER detection of Swift J1922.7-1716 optical counterpart
  45. GRB 111103B: Swift-BAT refined analysis
  46. GRB 111103A: Swift-BAT refined analysis
  47. GRB 111022B: MASTER OT observations
  48. GRB 111103B: optical observations
  49. GRB 111103B: Swift detection of a strong burst from a GRB or Galactic source
  50. GRB 111103A: Swift detection of a burst
  51. GRB 111029A: RAPTOR Limits During the Gamma-ray Emitting Interval
  52. All GCN Circulars available in a tarfile for data mining
  53. GRB111029A: MITSuME Ishigakijima Optical Upper Limits
  54. GRB 111026A: Swift-BAT refined analysis
  55. GRB 111029A: Swift-BAT refined analysis
  56. GRB 111029A: Faulkes Telescope North observations
  57. GRB 111029A: ROTSE-III Optical Limits
  58. GRB 111029A: Swift detection of a burst
  59. GRB 111026A: Swift detection of a burst
  60. GRB 111022B: 10.4m GTC z'-band observations
  61. GRB 111022A: MITSuME Akeno Optical upper limits
  62. GRB 111022B, Swift-BAT refined analysis
  63. GRB 111022B: Gemini infrared observations
  64. GRB 111022B: MITSuME Akeno Optical upper limits
  65. GRB 111022A: Swift-BAT refined analysis
  66. GRB 111022B: MASTER-Net early limit
  67. GRB 111022A: MASTER-Net early limit
  68. GRB 111022A: Swift detection of a burst
  69. GRB 111020A: Gemini-South additional observations and limit on an optical afterglow
  70. GRB 111020A: Gemini-South i-band observations
  71. GRB 111020A: Faulkes Telescope South observations
  72. GRB 111020A: Swift-BAT refined analysis
  73. GRB 111020A: Swift detection of a short burst
  74. GRB 110918A: Optical light curve for days 1.4 to 16.3
  75. GRB 111018A: Swift-BAT refined analysis
  76. Konus-Wind observation of GRB 111016B
  77. IPN Triangulation of GRB 111016B (long duration, intense)
  78. GRB 111018A: Swift detection of a burst
  79. GRB 111017A: Fermi GBM Detection
  80. GRB 111016A: Gemini Detection of the NIR Counterpart
  81. GRB 111016A: Swift-BAT refined analysis
  82. GRB 111016A: P60 Afterglow Candidate
  83. GRB 111016A: MITSuME Akeno Optical upper limits
  84. GRB 111016A: Swift-XRT refined Analysis
  85. Konus-Wind observation of GRB 111008A
  86. GRB 111008A: VLT/X-shooter spectroscopy
  87. GRB 111008A, Swift-BAT refined analysis,
  88. GRB 111005A : miniTAO/ANIR NIR observations
  89. GRB 111005A: VLT optical observations
  90. GRB 111005A: GROND NIR observations
  91. GRB 111005A: Swift-BAT refined analysis
  92. GRB 111005A: Swift detection of a burst
  93. GRB 111003A: Fermi GBM detection
  94. Skynet/Dolomiti observations of GRB 110928A
  95. Skynet observations of GRB 110928A
  96. GRB 110928A: RAPTOR Limits During Gamma-ray Emitting Interval
  97. Trigger 504307: Swift detection of MAXI J1836-194
  98. GRB 110825A: GROND Observations
  99. GRB 110928A: P60 Observations
  100. GRB 110928A: Further PAIRITEL NIR Observations

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