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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"

3059 results found.

  1. GRB 140320A: Fermi GBM observations suggest a short GRB
  2. GRB 140320A: Swift detection of a burst
  3. GRB 140311A: VLA Detection
  4. GRB 140311A: further NOT observations
  5. GRB 140311A: Kottamia I-band observation
  6. GRO J1744-28: Fermi GBM observation
  7. GRB 140311A: Enhanced Swift-XRT position
  8. GRB 140311A: Nanshan OT detection
  9. GRB 140305A: Swift-BAT refined analysis
  10. Konus-Wind observation of GRB 140226A
  11. IPN triangulation of GRB 140226A, a possible GRB counterpart to iPTF14yb
  12. GRB 140219A: results from Swift XRT and UVOT tiled observations
  13. GRB 140219A: MASTER before and after GRB observational arguments of the exceptionally Dark GRB
  14. Trigger 586482: Swift detection of GROJ1744-28
  15. GRB 140209A: Swift detection of a burst
  16. GRB 140206A, Swift-BAT refined analysis
  17. GRB 140129A: 5 GHz VLA observations
  18. GRB 140129B: MASTER OT early light curve
  19. GRB 140129A: CARMA early observations
  20. GRB 140129A, Swift-BAT refined analysis
  21. GRB 140114A: NOT afterglow observations
  22. GRB 140114A: KAIT Optical Upper Limit
  23. GRB 140114A: Enhanced Swift-XRT position
  24. GRB 140114A: Swift detection of a burst
  25. GRB 140110A: Swift/UVOT Observations
  26. GRB 131227A: Swift detection of a burst
  27. GRB 131225A: MASTER-Net optical observations
  28. GRB 131226A: Swift detection of a burst
  29. GRB 131215A: MAXI/GSC detection
  30. IPN Triangulation of GRB 131209A
  31. GRB 131127A: AROMA-N Optical Observation
  32. GRB 131122A (INTEGRAL trigger N6392): MASTER-NET optical observation
  33. IPN Triangulation of GRB 131118A
  34. GRB 131117A, Swift-BAT refined analysis
  35. IPN triangulation of GRB 131108A
  36. GRB 131030A: D50+BART detection and light curve optical decay
  37. GRB 131030A: Watcher OT detection
  38. GRB 131030A: Swift detection of a burst with an optical counterpart
  39. GRB 131004A: MOSFIRE NIR imaging
  40. GRB 131004A, Swift-BAT refined analysis
  41. GRB 131004A: Swift/UVOT Detection
  42. GRB 131004A: Enhanced Swift-XRT position
  43. GRB 131004A: optical afterglow from the NOT
  44. GRB 131004A: Swift detection of a burst (may be short)
  45. GRB 131002B, Swift-BAT refined analysis
  46. GRB 131001A, Swift-BAT refined analysis
  47. GRB 131002A: Faulkes Telescope North optical afterglow
  48. GRB 130925A: continuing Swift/XRT monitoring
  49. GRB 130925A Swift-BAT refined analysis
  50. GRB 130925A: Initial Similarities to Swift J1644+57
  51. GRB 130919A, Swift-BAT refined analysis
  52. GRB 130912A: Swift detection of a short burst
  53. GRB 130907A, Swift-BAT refined analysis
  54. GRB 130831A: Maidanak optical observations
  55. GRB 130821A: Swift-XRT observation
  56. GRB 130816B, Swift-BAT refined analysis
  57. GRB 130816B: GROND afterglow candidate
  58. GRB 130807A: Swift-XRT refined analysis
  59. GRB 130807A, Swift-BAT refined analysis
  60. GRB 130701A, Swift-BAT refined analysis
  61. GRB 130627B, Swift-BAT refined analysis
  62. GRB 130626A, Swift-BAT refined analysis
  63. GRB 130626A: Swift-XRT possible detection and UVOT upper limits
  64. GRB 130626A: Swift detection of a short burst
  65. Swift Trigger 558631 is not a real source
  66. GRB 130612A: Swift-BAT refined analysis
  67. GRB 130610A: CrAO optical observations
  68. GRB 130615A: Swift-BAT refined analysis
  69. GRB 130615A: Swift detection of a burst
  70. GRB 130610A: iTelescope T21 optical observations
  71. IPN Triangulation of GRB 130610B (long/multipeaked)
  72. GRB 130610A: Swift/UVOT Observations
  73. GRB 130610A: Skynet/PROMPT detection of the optical afterglow
  74. GRB 130610A - Liverpool Telescope Optical Afterglow Confirmation
  75. GRB 130610A: Swift detection of a burst with an optical counterpart
  76. GRB130606A: Montarrenti Observatory afterglow detection
  77. GRB 130603B: MASTER-Net early observations and optical sloap limit
  78. GRB 130604A: KAIT optical upper limit
  79. GRB 130528A: Swift-BAT refined analysis
  80. GRB 130514A: Konus-Wind and Swift/BAT joint spectral analysis
  81. GRB 130514B: Swift-XRT Observations
  82. GRB 130513A: GROND observations
  83. GRB 130514A: Swift detection of a burst
  84. GRB 130511A: Swift-XRT refined Analysis
  85. GRB 130511A, Swift-BAT refined analysis
  86. GRB 130508A: Refined Swift-XRT analysis: Correction to GCN 14612
  87. GRB 130508A, Swift-BAT refined analysis
  88. GRB 130508A: Swift detection of a probable burst
  89. GRB 130505A: optical observations
  90. IPN Triangulation of GRB 130504B
  91. GRB 130504B: Fermi GBM detection
  92. GRB 130504A, Swift-BAT refined analysis
  93. GRB 130427A optical time series
  94. GRB 130427A: MITSuME Okayama Optical Observation
  95. GRB 130427A: Swift detection of a very bright burst with a likely bright optical counterpart
  96. GRB 130420B: Swift/UVOT Upper Limits
  97. GRB 130420B, Swift-BAT refined analysis
  98. GRB 130420A, Swift-BAT refined analysis
  99. GRB 130420B: MASTER-Net optical observations
  100. GRB 130420B: Swift detection of a burst

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