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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"

42571 results found.

  1. GRB 140419A: T24 optical observations
  2. GRB 140419A: Gemini-N redshift
  3. GRB 140419A: Enhanced Swift-XRT position
  4. GRB140419A: UVOT detects fading afterglow in white but not in u filter
  5. GRB 140419A: CARMA early 3mm detection
  6. GRB 140419A: RATIR Optical and NIR Observations
  7. GRB 140419A: ROTSE-III Detection of Optical Counterpart
  8. GRB 140419A (Swift trigger 596426) : KAIT optical candidate
  9. GRB 140419A: Swift detection of a burst with optical afterglow
  10. Konus-Wind observation of GRB 140416A
  11. GRB 140416A: Fermi GBM detection
  12. GRB 140414A: Swift/UVOT Upper Limit
  13. GRB 140414A: Swift-XRT observations
  14. GRB 140414A: TNG optical observations
  15. GRB 140414A: Swift-BAT refined analysis
  16. GRB 140414A: Short burst found in ground analysis of BAT slew data
  17. GRB 140413A: Swift/UVOT Observations of the Optical Afterglow
  18. GRB 140412A: Swift/UVOT Upper Limits
  19. Konus-Wind observation of GRB 140413A
  20. GRB 140413A: Swift-XRT refined Analysis
  21. GRB 140413A: Swift-BAT refined analysis
  22. GRB 140412A: Swift-XRT refined Analysis
  23. GRB 140412A: Swift-BAT refined analysis
  24. GRB 140413A: TAROT La Silla observatory optical observations
  25. GRB 140413A: Swift-XRT observations
  26. GRB 140412A: Enhanced Swift-XRT position
  27. GRB 140413A: GROND afterglow candidate
  28. Swift Trigger 595616: a possible GRB
  29. GRB 140412A: Swift detection of a burst
  30. GRB 140408A: 1.5m OSN optical upper limit
  31. Swift Trigger 595345 is not an astrophysical source
  32. Swift-BAT trigger 595162 is noise
  33. GRB 140408A: MITSuME Akeno Optical observation
  34. Fermi418277210: iPTF optical observations
  35. GRB 140408A: RATIR Optical Upper Limits
  36. GRB 140408A: Swift-BAT refined analysis
  37. GRB 140408A: GROND Detection of an Afterglow Candidate
  38. GRB 140408A: Swift/UVOT Upper Limits
  39. GRB 140408A: Swift-XRT refined Analysis
  40. GRB 140408A: MITSuME Okayama upper limits
  41. GRB 140408A: Enhanced Swift-XRT position
  42. GRB 140408A: Fermi GBM detection
  43. Swift Trigger 595162: a possible GRB
  44. GRB 140408A: Swift detection of a burst
  45. GRB 140406A: Fermi GBM observation
  46. GRB 140402A: Deep limit on the optical afterglow from Magellan observations
  47. GRB 111225A: Archeological redshift of the Christmas Burst 2011 from GTC
  48. GRB 140402A: Swift/UVOT Upper Limits
  49. GRB 140331A: Continued RATIR Optical and NIR Observations
  50. GRB 140402A: Swift-XRT observations
  51. GRB 140402A: MASTER optical observations
  52. GRB 140402A BAT refined analysis
  53. GRB 140402A : Xinglong TNT upper limit
  54. GRB 140402A: Marginal BAT detection
  55. GRB 140402A: Fermi GBM detection
  56. GRB 140402A: Fermi-LAT detection of a burst
  57. Swift trigger 594286: Is likely a noise trigger
  58. GRB 140330A: Fermi GBM observation
  59. GRB 140331A: Swift-XRT refined Analysis
  60. GRB 140301A: Zadko observatory - Gingin optical observations
  61. GRB 140331A: Swift-BAT refined analysis
  62. Retraction of the Fermi/LAT high-energy counterpart for GRB 140330A
  63. GRB 140331A: Swift/UVOT Upper Limits
  64. GRB 140302A: TAROT La Silla observatory optical observations
  65. GRB 140323A: Zadko observatory - Gingin optical observations
  66. GRB 140330A: intense and persistent gamma-ray emission detected by AGILE
  67. GRB 140331A: Zadko observatory - Gingin optical observations
  68. Konus-Wind observation of GRB 140330A
  69. GRB 140129B: AAO optical upper limit
  70. GRB 140129A: Mondy optical observations
  71. GRB 140331A: MITSuME Okayama upper limits
  72. GRB 140331A: Enhanced Swift-XRT position
  73. GRB 140331A: RATIR Optical and NIR Observations
  74. GRB 140331A: Swift detection of a burst
  75. GRB 140330A: Fermi-LAT Detection
  76. GRB 140329A: Fermi-LAT detection
  77. Konus-Wind observation of GRB 140329A
  78. GRB 140320D: MASTER optical observations
  79. GRB 140329A: Fermi GBM observation of a bright burst
  80. Swift trigger 593744: detection of a flare from UV Cet
  81. GRB 140320D: Suzaku WAM observation of the prompt emission
  82. GRB 140323A : Suzaku WAM observation of the prompt emission
  83. GRB 140226A/iPTF14yb: Mondy optical observations
  84. GRB 140320C: Mondy optical observations and afterglow confirmation
  85. Konus-Wind observation of GRB 140323A
  86. GRB 140323A: Fermi-LAT detection
  87. GRB 140323A: Swift-XRT refined Analysis
  88. GRB 140323A: Fermi GBM observation
  89. GRB 140323A: BOOTES-3 optical upper limit.
  90. GRB 140323A: Swift/UVOT Upper Limits
  91. GRB 140323A: Swift-BAT refined analysis
  92. GRB 140323A: Enhanced Swift-XRT position
  93. GRB 140323A: Swift detection of a burst
  94. GRB 140320A: RATIR Optical and NIR Observations
  95. Konus-Wind observation of GRB 140320D
  96. GRB 140320B: P60 detection of a very red afterglow
  97. GRB 140320C: Mini-GWAC prompt observation
  98. GRB 140320C: Swift/UVOT Upper Limits
  99. GRB 140320A: Swift-BAT refined analysis
  100. GRB 140320B: Swift/UVOT Upper Limits

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