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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"

19670 results found.

  1. IPN Triangulation of GRB 140308A
  2. IPN Triangulation of GRB 140306A
  3. GRB 140304A: Continued RATIR Optical and NIR Observations
  4. GRB 140305A: Swift-BAT refined analysis
  5. Trigger 590503: Swift-BAT triggered on noise
  6. GRB 140304A: CARMA 3mm detection
  7. GRB 140305A: Swift detection of a burst
  8. GRB 140304A: RATIR g-band Dropout
  9. GRB 140304A: Swift-BAT refined analysis
  10. GRB 140304A: Swift-XRT refined Analysis
  11. GRB 140304A: Enhanced Swift-XRT position
  12. GRB 140304A: Fermi GBM detection
  13. GRB 140304A: 10.4m GTC redshift z = 5.39
  14. GRB 140304A: Swift/UVOT Upper Limits
  15. GRB 140304A: Afterglow decay from Nanshan observations
  16. GRB 140304A: Swift detection of a burst
  17. GRB 140304A: MASTER OT detecton
  18. GRB 140301A: Swift/UVOT Upper Limits
  19. GRB 140302A: Swift/UVOT Upper Limits
  20. GRB140302A: Fermi GBM detection
  21. GRB 140302A: Swift-XRT refined Analysis
  22. GRB 140302A: Swift-BAT refined analysis
  23. GRB 140302A: Enhanced Swift-XRT position
  24. GRB 140301A: Swift-BAT refined analysis
  25. GRB 140301A: Swift-XRT refined Analysis
  26. GRB 140301A: GROND Detection of the Optical/NIR Afterglow
  27. GRB 140302A: GROND afterglow candidate
  28. GRB 140302A: Prompt enhanced Swift-XRT position
  29. GRB 140302A: Swift detection of a burst
  30. GRB 140301A: Enhanced Swift-XRT position
  31. GRB 140301A: Skynet R-COP Observations
  32. GRB 140301A: Swift detection of a burst
  33. GRB 140226A/iPTF14yb: Swift/UVOT Observations
  34. GRB 140226A / iPTF14yb: Swift-XRT confirms a fading X-ray source
  35. IPN triangulation of GRB 140226A, a possible GRB counterpart to iPTF14yb
  36. iPTF14yb: Swift-XRT detection
  37. GRB 140219A: Retraction of X-ray afterglow
  38. GRB 140102A: TAOS early optical afterglow detection
  39. GRB 140219A: XRT afterglow candidate
  40. GRB 140221A: Results from Swift XRT tiled observations
  41. GRB 140219A: Xuyi and Nanshan upper limits
  42. GRB 140219A: results from Swift XRT and UVOT tiled observations
  43. GRB 140221A Tiled Swift observations
  44. GRB 140219A Tiled Swift observations
  45. Swift follow-up of an Integral weak transient
  46. GRB 140213A: Continued Skynet R-COP/PROMPT Observations of the Optical Afterglow
  47. GRB 140215A: RAPTOR Observations During Gamma-Ray Emitting Interval
  48. GRB 140213A: Continued Skynet R-COP/PROMPT Detections of a Rebrightening Optical Afterglow
  49. GRB 140215A: Continued Skynet PROMPT Observations of the Optical Afterglow
  50. GRB 140211A: Khureltogot optical upper limits
  51. GRB 140215A: Continued RATIR Optical and NIR Observations
  52. Konus-Wind observation of GRB 140213A
  53. Konus-Wind observation of GRB 140215A
  54. GRB 140215A: Swift/UVOT Detection
  55. GRB 140211A: Swift-XRT and UVOT observations
  56. GRB140215A: Continued Discovery Channel Telescope Observations
  57. GRB 140215A: Swift-BAT refined analysis
  58. GRB 140215A: ISON-NM optical observations
  59. GRB 140215A: Swift-XRT refined Analysis
  60. GRB 140215A: P60 observations
  61. GRB 140215A: Enhanced Swift-XRT position
  62. GRB 140215A: RATIR Optical and NIR Observations
  63. GRB140215A: Skynet PROMPT Optical Observations
  64. GRB 140215A: KAIT Optical Detection
  65. GRB140215A: Prompt Observations with Discovery Channel Telescope
  66. GRB 140215A: Swift detection of a burst with optical counterpart
  67. GRB 140213A: Swift-BAT refined analysis
  68. GRB140206A: Discovery Channel Telescope Optical Detection
  69. GRB 140213A: Swift/UVOT Observations
  70. GRB 140213A: Fermi GBM Detection
  71. GRB 140213A: Swift-XRT refined Analysis
  72. GRB 140213A: Enhanced Swift-XRT position
  73. GRB 140213A: GROND Detection of the Optical/NIR Afterglow
  74. GRB 140213A: Skynet R-COP Detection of Optical Afterglow
  75. GRB 140213A: Swift-XRT observations
  76. GRB 140213A: Swift/UVOT Detection
  77. GRB 140213A: Swift detection of a burst
  78. Trigger 586482: Swift detection of GROJ1744-28
  79. Correction to GCN 18521 "GRB140209A: Swift/UVOT observations"
  80. GRB140209A: Swift/UVOT observations.
  81. GRB 140211A: Swift-BAT refined analysis
  82. GRB 140209A: Swift-XRT observations
  83. Konus-Wind observation of GRB 140209A
  84. GRB 140211A: Swift detection of a burst
  85. GRB 140209A: Early RAPTOR Optical Detection
  86. GRB 140209A: Swift-BAT Spectral lag analysis
  87. GRB 140206A: Bassano Bresciano Observatory optical upper limit
  88. GRB 140209A, Swift-BAT refined analysis
  89. GRB 140209A: Fermi GBM observation
  90. GRB 140209A: optical observations
  91. GRB 140209A: P60 optical afterglow detection
  92. GRB 140209A: Swift detection of a burst
  93. GRB 140206A: Mondy optical observations
  94. GRB 140206A: Liverpool Telescope optical afterglow observations
  95. GRB 140206A, Swift-BAT refined analysis
  96. GRB 140206A: Swift-XRT refined Analysis
  97. GRB 140206A: T100 observations
  98. GRB 140206A: Fermi GBM detection
  99. GRB 140206A: Swift/UVOT Detection
  100. GRB 140206A: theoretical prediction of redshift and of supernova occurrence

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