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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"

19662 results found.

  1. GRB 140305A: Swift detection of a burst
  2. GRB 140304A: RATIR g-band Dropout
  3. GRB 140304A: Swift-BAT refined analysis
  4. GRB 140304A: Swift-XRT refined Analysis
  5. GRB 140304A: Enhanced Swift-XRT position
  6. GRB 140304A: Fermi GBM detection
  7. GRB 140304A: 10.4m GTC redshift z = 5.39
  8. GRB 140304A: Swift/UVOT Upper Limits
  9. GRB 140304A: Afterglow decay from Nanshan observations
  10. GRB 140304A: Swift detection of a burst
  11. GRB 140304A: MASTER OT detecton
  12. GRB 140301A: Swift/UVOT Upper Limits
  13. GRB 140302A: Swift/UVOT Upper Limits
  14. GRB140302A: Fermi GBM detection
  15. GRB 140302A: Swift-XRT refined Analysis
  16. GRB 140302A: Swift-BAT refined analysis
  17. GRB 140302A: Enhanced Swift-XRT position
  18. GRB 140301A: Swift-BAT refined analysis
  19. GRB 140301A: Swift-XRT refined Analysis
  20. GRB 140301A: GROND Detection of the Optical/NIR Afterglow
  21. GRB 140302A: GROND afterglow candidate
  22. GRB 140302A: Prompt enhanced Swift-XRT position
  23. GRB 140302A: Swift detection of a burst
  24. GRB 140301A: Enhanced Swift-XRT position
  25. GRB 140301A: Skynet R-COP Observations
  26. GRB 140301A: Swift detection of a burst
  27. GRB 140226A/iPTF14yb: Swift/UVOT Observations
  28. GRB 140226A / iPTF14yb: Swift-XRT confirms a fading X-ray source
  29. IPN triangulation of GRB 140226A, a possible GRB counterpart to iPTF14yb
  30. iPTF14yb: Swift-XRT detection
  31. GRB 140219A: Retraction of X-ray afterglow
  32. GRB 140102A: TAOS early optical afterglow detection
  33. GRB 140219A: XRT afterglow candidate
  34. GRB 140221A: Results from Swift XRT tiled observations
  35. GRB 140219A: Xuyi and Nanshan upper limits
  36. GRB 140219A: results from Swift XRT and UVOT tiled observations
  37. GRB 140221A Tiled Swift observations
  38. GRB 140219A Tiled Swift observations
  39. Swift follow-up of an Integral weak transient
  40. GRB 140213A: Continued Skynet R-COP/PROMPT Observations of the Optical Afterglow
  41. GRB 140215A: RAPTOR Observations During Gamma-Ray Emitting Interval
  42. GRB 140213A: Continued Skynet R-COP/PROMPT Detections of a Rebrightening Optical Afterglow
  43. GRB 140215A: Continued Skynet PROMPT Observations of the Optical Afterglow
  44. GRB 140211A: Khureltogot optical upper limits
  45. GRB 140215A: Continued RATIR Optical and NIR Observations
  46. Konus-Wind observation of GRB 140213A
  47. Konus-Wind observation of GRB 140215A
  48. GRB 140215A: Swift/UVOT Detection
  49. GRB 140211A: Swift-XRT and UVOT observations
  50. GRB140215A: Continued Discovery Channel Telescope Observations
  51. GRB 140215A: Swift-BAT refined analysis
  52. GRB 140215A: ISON-NM optical observations
  53. GRB 140215A: Swift-XRT refined Analysis
  54. GRB 140215A: P60 observations
  55. GRB 140215A: Enhanced Swift-XRT position
  56. GRB 140215A: RATIR Optical and NIR Observations
  57. GRB140215A: Skynet PROMPT Optical Observations
  58. GRB 140215A: KAIT Optical Detection
  59. GRB140215A: Prompt Observations with Discovery Channel Telescope
  60. GRB 140215A: Swift detection of a burst with optical counterpart
  61. GRB 140213A: Swift-BAT refined analysis
  62. GRB140206A: Discovery Channel Telescope Optical Detection
  63. GRB 140213A: Swift/UVOT Observations
  64. GRB 140213A: Fermi GBM Detection
  65. GRB 140213A: Swift-XRT refined Analysis
  66. GRB 140213A: Enhanced Swift-XRT position
  67. GRB 140213A: GROND Detection of the Optical/NIR Afterglow
  68. GRB 140213A: Skynet R-COP Detection of Optical Afterglow
  69. GRB 140213A: Swift-XRT observations
  70. GRB 140213A: Swift/UVOT Detection
  71. GRB 140213A: Swift detection of a burst
  72. Trigger 586482: Swift detection of GROJ1744-28
  73. Correction to GCN 18521 "GRB140209A: Swift/UVOT observations"
  74. GRB140209A: Swift/UVOT observations.
  75. GRB 140211A: Swift-BAT refined analysis
  76. GRB 140209A: Swift-XRT observations
  77. Konus-Wind observation of GRB 140209A
  78. GRB 140211A: Swift detection of a burst
  79. GRB 140209A: Early RAPTOR Optical Detection
  80. GRB 140209A: Swift-BAT Spectral lag analysis
  81. GRB 140206A: Bassano Bresciano Observatory optical upper limit
  82. GRB 140209A, Swift-BAT refined analysis
  83. GRB 140209A: Fermi GBM observation
  84. GRB 140209A: optical observations
  85. GRB 140209A: P60 optical afterglow detection
  86. GRB 140209A: Swift detection of a burst
  87. GRB 140206A: Mondy optical observations
  88. GRB 140206A: Liverpool Telescope optical afterglow observations
  89. GRB 140206A, Swift-BAT refined analysis
  90. GRB 140206A: Swift-XRT refined Analysis
  91. GRB 140206A: T100 observations
  92. GRB 140206A: Fermi GBM detection
  93. GRB 140206A: Swift/UVOT Detection
  94. GRB 140206A: theoretical prediction of redshift and of supernova occurrence
  95. GRB 140206A: Enhanced Swift-XRT position
  96. GRB 140206A: ISON-Ussuriysk optical observations
  97. GRB 140206B: Fermi-LAT detection
  98. GRB 140206A: Swift/UVOT optical detection
  99. GRB140206A: a long GRB detected by INTEGRAL
  100. GRB 140206A: Swift detection of a burst

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