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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 160408A: Fermi GBM detection
  2. GRB 160408A: Swift-BAT refined analysis
  3. GRB 160408A: Enhanced Swift-XRT position
  4. GRB 160408A: Swift detection of a short burst
  5. IPN Triangulation of GRB 160406A (short/hard)
  6. GRB 160401A: Swift-XRT observations
  7. GRB 160401A: Swift/UVOT Upper Limits
  8. GRB 160401A: Swift ToO observations
  9. GRB 160327A: Early RAPTOR Limits
  10. Konus-Wind observation of GRB 160325A
  11. GRB 160327A: Continued RATIR Optical and NIR Observations
  12. GRB 160327A: KAIT optical afterglow confirmation
  13. GRB 160327A: Mondy optical upper limit
  14. GRB 160327A: Swift-BAT refined analysis
  15. GRB 160327A: Swift/UVOT Upper Limits
  16. GRB 160327A: Swift-XRT refined Analysis
  17. GRB 160327A: Enhanced Swift-XRT position
  18. GRB 160327A: RATIR Optical and NIR Afterglow Detection
  19. GRB 160327A: Swift detection of a burst
  20. GRB 160325A, Swift-BAT refined analysis
  21. GRB 160325A: GROND Upper Limits
  22. GRB 160325A: Swift-XRT refined Analysis
  23. GRB 160325A: Further Swift/UVOT Observations
  24. GRB 160325A: Enhanced Swift-XRT position
  25. GRB160325A Swift/UVOT Detection
  26. GRB 160325A: Fermi-LAT detection
  27. Swift Trigger 680457 is not a GRB
  28. GRB 160325A: Fermi GBM detection
  29. GRB 160325A: Swift detection of a burst
  30. Swift detects GX 301-2 in very high state
  31. GRB 160321A: AbAO optical observations
  32. GRB 160321A: Possible RATIR Optical and NIR Detections
  33. GRB 160321A: Swift/UVOT Upper Limits
  34. GRB 160321A: Swift-BAT refined analysis
  35. GRB 160321A: Swift-XRT refined Analysis
  36. GRB 160321A: Enhanced Swift-XRT position
  37. GRB 160321A: MASTER observations zero Galaxy latitude GRB
  38. GRB 160321A: Swift detection of a probable burst
  39. IPN Triangulation of GRB 160310A
  40. SGR 0755-2933, Swift-BAT refined analysis
  41. GRB 160131A: 15 GHz upper limits from AMI-LA
  42. GRB 160310A: A further Swift-XRT observation, no afterglow detected
  43. Swift detection of a likely new SGR: SGR 0755-2933
  44. GRB 160314A: Continued RATIR Optical and NIR Observations
  45. GRB 160313A: Mondy optical upper limit
  46. GRB 160314A: GROND optical/NIR observations
  47. GRB 160314A: RATIR Optical and NIR Observations
  48. GRB 160313A: Swift/UVOT Upper Limits
  49. GRB 160314A: VLT/X-shooter redshift
  50. GRB 160314A: Swift-XRT refined Analysis
  51. GRB 160314A: Swift-BAT refined analysis
  52. GRB 160314A: Swift/UVOT Detection
  53. GRB 160228A: GROND afterglow confirmation and X-shooter host candidate redshift
  54. GRB 160314A: Enhanced Swift-XRT position
  55. GRB 160314A: Swift detection of a burst
  56. GRB 160313A, Swift-BAT refined analysis
  57. GRB 160313A: Chante-Perdrix Observatory optical observations
  58. GRB 160313A: MASTER-Net optical observations
  59. GRB 160313A: LT observations
  60. GRB 160313A: Swift-XRT refined Analysis
  61. GRB 160313A: TAROT Calern observatory optical observations
  62. GRB 160313A: Enhanced Swift-XRT position
  63. GRB 160313A: RATIR Optical and NIR Observations
  64. GRB 160313A: Swift detection of a burst
  65. GRB 160310A: Swift/UVOT Upper Limits
  66. GRB 160310A: RATIR Optical and NIR Observations
  67. GRB 160310A: Swift-XRT observations
  68. GRB 160310A: Swift ToO observations
  69. GRB 160310A: Fermi-LAT detection
  70. Swift Trigger 678197 is a noise fluctuation
  71. Trigger 677981: Swift detection of IGRJ17091-3624
  72. Swift trigger 677890 is noise
  73. GRB160303A: further GROND observations
  74. GRB 160303A, Swift-BAT refined analysis
  75. GRB 160303A: GROND Optical Detection
  76. GRB 160303A: VLT/FORS2 afterglow obervations
  77. GRB 160303A iTelescope observation
  78. GRB 160303A: Swift-XRT refined Analysis
  79. Swift possibly triggered on IGR17091-3624
  80. GRB 160303A: Swift/UVOT Detection
  81. GRB 160303A: RAPTOR Observations During Gamma-Ray Emitting Interval
  82. GRB 160303A: Enhanced Swift-XRT position
  83. GRB 160303A: RATIR Optical and NIR Afterglow Detection
  84. GRB 160303A: LCOGT-FTN optical observations
  85. GRB 160303A: ISON-NM early optical early limits
  86. GRB 160303A: Swift detection of a burst, possibly short
  87. GRB 160228A: Swift/UVOT Upper Limits
  88. GRB 160227A: Swift/UVOT Detection
  89. GRB 160228A: Mondy optcial observations
  90. GRB 160228A: RATIR Optical and NIR Observations
  91. GRB 160228A: MASTER-Amur prompt observations
  92. GRB 160228A: Swift-XRT refined Analysis
  93. GRB 160227A: MASTER prompt OT Detection and LC
  94. GRB 160227A: AROMA-N Optical Observation
  95. GRB 160228A: GROND Afterglow Candidate
  96. GRB 160228A: Swift-BAT refined analysis
  97. GRB 160228A: Enhanced Swift-XRT position
  98. GRB 160228A: Prompt enhanced Swift-XRT position
  99. GRB 160228A: Swift detection of a burst
  100. GRB 160227A, Swift-BAT refined analysis

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