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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"

14936 results found.

  1. GRB 140320A: Swift-XRT detection of an afterglow candidate
  2. GRB 140320A: Swift detection of a burst
  3. GRB140318A: Discovery Channel Telescope Optical Detection
  4. GRB 140318A: NOT detection of the afterglow
  5. GRB 140318A: Swift detection of a burst
  6. GRB 140311A: VLA Detection
  7. GRB140308A: Suzaku WAM observation of the prompt emission
  8. GRB 140311A: RATIR Optical and NIR Detection
  9. GRB 140311C: Fermi GBM Detection
  10. GRB 140311B: Fermi GBM Detection
  11. GRB 140311A: Swift/UVOT Upper Limits
  12. Fermi416242156: possible iPTF counterpart
  13. GRB 140311B: RATIR Optical and NIR Observations
  14. GRB 140311A: NOT redshift confirmation
  15. GRB 140311B: Nanshan afterglow detection
  16. GRB 140311A: Nanshan OT detection
  17. GRB 140311B: Swift detection of a burst
  18. GRB 140311A: Swift detection of a probable burst
  19. GRB 140304A: Suzaku WAM observation of the prompt emission
  20. GRB 140306A: Suzaku WAM observation of the prompt emission
  21. Konus-Wind observation of GRB 140306A
  22. GRB 140304A: Continued RATIR Optical and NIR Observations
  23. GRB 140306A: Fermi GBM detection
  24. Trigger 590503: Swift-BAT triggered on noise
  25. GRB 140304A: CARMA 3mm detection
  26. GRB 140304A: VLA Detection
  27. GRB 140305A: Swift detection of a burst
  28. GRB 140304A: Fermi GBM detection
  29. GRB 140304A: 10.4m GTC redshift z = 5.39
  30. iPTF14yb: JVLA and CARMA observations
  31. GRB 140304A: Khureltogot optical observations
  32. GRB 140304A: Swift detection of a burst
  33. GRB140302A: Fermi GBM detection
  34. GRB 140301A: GROND Detection of the Optical/NIR Afterglow
  35. GRB 140302A: Swift detection of a burst
  36. GRB 140301A: Swift detection of a burst
  37. PTF14yb: GROND Transient Detection
  38. GRB 140219A: Suzaku WAM observation of the prompt emission
  39. iPTF14yb: Swift-XRT detection
  40. GRB 140219A: MAXI/GSC detection
  41. GRB 140219A: MASTER optical brightening inside XRT-5 error box detection
  42. GRB 140219A: iPTF optical observations
  43. GRB 140102A: TAOS early optical afterglow detection
  44. GRB 140219A: Xuyi and Nanshan upper limits
  45. Konus-Wind observation of exceptionally bright GRB 140219A
  46. GRB 140221A: MAXI/GSC detection
  47. GRB 140219A: Fermi-LAT detection of a burst
  48. GRB 140219A: Fermi GBM Detection
  49. GRB 140215A: RAPTOR Observations During Gamma-Ray Emitting Interval
  50. Konus-Wind observation of GRB 140213A
  51. GRB 140215A: Swift/UVOT Detection
  52. GRB 140215A: KAIT Optical Detection
  53. GRB 140215A: Swift detection of a burst with optical counterpart
  54. GRB140206A: Discovery Channel Telescope Optical Detection
  55. GRB 140213A: Fermi GBM Detection
  56. GRB 140213A: GROND Detection of the Optical/NIR Afterglow
  57. GRB 140213A: Skynet R-COP Detection of Optical Afterglow
  58. GRB 140213A: Swift/UVOT Detection
  59. GRB 140213A: Swift detection of a burst
  60. Trigger 586482: Swift detection of GROJ1744-28
  61. Konus-Wind observation of GRB 140209A
  62. GRB 140211A: Swift detection of a burst
  63. GRB 140209A: Early RAPTOR Optical Detection
  64. GRB 140209A: P60 optical afterglow detection
  65. GRB 140209A: Swift detection of a burst
  66. Konus-Wind observation of GRB 140206B
  67. GRB 140206A: MITSuME Akeno detection of the optical counterpart
  68. GRB 140206A: Fermi GBM detection
  69. GRB 140206A: Swift/UVOT Detection
  70. GRB 140206B: Fermi-LAT detection
  71. GRB 140206B: Fermi GBM detection
  72. GRB 140206A: MASTER OT detection
  73. GRB 140206A: Swift/UVOT optical detection
  74. GRB 140206A: Swift detection of a burst
  75. GRB 140129B: Swift/UVOT Detection
  76. GRB 140129B: MASTER OT early light curve
  77. GRB 140129B, Swift-BAT refined analysis (probably not a short burst)
  78. GRB 140129B: Swift detection of a burst with an optical afterglow
  79. GRB 140129A: ROTSE-III Detection of Optical Counterpart
  80. GRB 140129A: P60 optical afterglow detection
  81. GRB 140129A: Swift detection of a burst with an optical afterglow
  82. Konus-Wind observation of GRB 131215A
  83. GRB 140118A: Swift detection of a burst
  84. GRB 140103A: MASTER-Net early OT detection
  85. GRB 140114A: Continued RATIR Optical and NIR Observations
  86. GRB 140114A: RATIR Optical and NIR Afterglow Detection
  87. GRB 140114A: Swift detection of a burst
  88. GRB 140104B: Suzaku WAM observation of the prompt emission
  89. GRB 140110A: OT detection in Swift/UVOT imaging
  90. GRB 140110A: Fermi-LAT detection of a burst
  91. GRB 140108A: Fermi GBM detection
  92. GRB 140108A: Swift/UVOT Detection
  93. GRB 140108A: D50+BART optical candidate detection
  94. GRB 140108A: MASTER-Net OT detection
  95. GRB 140108A: Swift detection of a burst
  96. New Fermi-LAT GRB Table
  97. GRB 140104B: Swift XRT observations
  98. GRB 140102A: Swift/UVOT Detection
  99. GRB 140105A: Fermi GBM detection
  100. GRB 140102A: BOOTES-4 early optical observations

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