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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"

19666 results found.

  1. GRB 160509A: non-observation of VHE emission with HAWC
  2. GRB 160509A: Further Swift/UVOT Observations
  3. GRB 160509A: MAXI/GSC refined analysis
  4. GRB 160509A: VLA Detection
  5. GRB 160509A: Fermi-LAT refined analysis
  6. GRB 160509A: Swift/UVOT Upper Limit
  7. GRB 160509A: Fermi GBM Detection
  8. GRB 160509A: optical observations
  9. GRB 160509A: Swift-XRT afterglow detection
  10. GRB 160509A: Preliminary XRT positon
  11. GRB 160509A: Tiled Swift observations
  12. GRB 160506A: TAROT La Silla observatory optical observations
  13. GRB 160506A: Swift-XRT refined Analysis
  14. GRB 160506A: Swift/UVOT Upper Limits
  15. GRB 160506A: Swift-BAT refined analysis
  16. GRB 160506A: GROND upper limits
  17. GRB 160506A: Enhanced Swift-XRT position
  18. GRB 160506A: Swift detection of a burst
  19. GRB 160504A: Swift-BAT refined analysis
  20. GRB 160504A: RATIR Optical and NIR Observations
  21. GRB 160504A: Swift/UVOT Upper Limits
  22. GRB160504A: Gemini NIR Observations
  23. GRB 160504A: Bassano Bresciano Observatory upper limits
  24. GRB 160504A: Swift-XRT refined Analysis
  25. GRB 160504A: Enhanced Swift-XRT position
  26. GRB 160504A: TAROT Calern observatory optical observations
  27. GRB 160504A: Swift detection of a burst
  28. GRB 160503A: Fermi-LAT detection
  29. GRB 160501A: Swift-BAT refined analysis
  30. GRB 160501A: GROND Upper limits
  31. GRB 160501A: Swift/UVOT Upper Limits
  32. GRB 160501A: Swift-XRT refined Analysis
  33. GRB 160501A: RATIR Optical and NIR Observations
  34. GRB 160501A: Enhanced Swift-XRT position
  35. GRB 160501A: TAROT Calern observatory optical observations
  36. GRB 160501A MASTER-NET early observations
  37. GRB 160501A: Swift detection of a burst
  38. Fermi/LAT search for counterpart to the IceCube event 67093193 (run 127853)
  39. GRB 160422A: XRT Afterglow Confirmation
  40. GRB 160425A: Swift/UVOT Detection
  41. GRB 160425A: Skynet PROMPT-CTIO observations of the optical afterglow
  42. GRB 160425A: Swift-BAT refined analysis
  43. GRB 160325A: Skynet PROMPT-CTIO observations of the optical afterglow
  44. GRB 160422A: GROND NIR afterglow detection
  45. GRB 160425A MASTER notices: possible host galaxy in the optical error-box
  46. GRB 160425A: GROND observation
  47. GRB 160425A: Swift-XRT refined Analysis
  48. GRB 160425A: Enhanced Swift-XRT position
  49. GRB 160422A: Swift/UVOT Afterglow Confirmation
  50. GRB 160425A : MASTER earlier optical observations
  51. GRB 160425A: Swift detection of an unusual burst with an optical afterglow
  52. Konus-Wind observation of GRB 160424A
  53. GRB 160424A: Fermi GBM observation
  54. GRB 160424A - XRT position uncertain
  55. GRB 160424A: Swift-BAT refined analysis
  56. GRB 160424A: Swift/UVOT Upper Limit
  57. GRB 160424A: Swift-XRT observations
  58. GRB 160424A: Swift detection of a burst
  59. GRB 160422A: Swift-XRT afterglow detection
  60. GRB 160422A: Swift/UVOT Candidate Afterglow
  61. GRB 160422A: Swift ToO observations
  62. GRB 160422A: Fermi-LAT Detection
  63. GRB 160419A, Swift-BAT refined analysis
  64. GRB 160419A: Fermi GBM detection
  65. GRB 160419A: Swift detection of a burst
  66. GRB 160417A: Swift-BAT refined analysis
  67. GRB 160417A: Swift/UVOT Detection
  68. GRB 160417A: Swift-XRT refined Analysis
  69. GRB 160417A: Enhanced Swift-XRT position
  70. GRB 160417A: KAIT optical afterglow confirmation
  71. GRB 160417A: Swift detection of a burst with an optical counterpart
  72. GRB 160412A: GROND upper limits
  73. Konus-Wind observation of GRB 160409A
  74. GRB 160412A: Swift/UVOT Upper Limits
  75. Swift Trigger 682614 is not a GRB
  76. GRB 160409A: Swift-XRT observations
  77. GRB 160409A found in Swift BAT ground analysis
  78. GRB 160412A: Swift-XRT refined Analysis
  79. GRB 160411A: Swift-BAT refined analysis of the short burst
  80. GRB 160412A: Swift-BAT refined analysis
  81. GRB 160412A: Enhanced Swift-XRT position
  82. GRB 160412A: Swift detection of a burst
  83. GRB 160408A: CALET Gamma-Ray Burst Monitor detection
  84. GRB 160409A: Swift ToO observations
  85. GRB 160411A: GROND Optical/NIR upper limits
  86. GRB 160411A: Swift/UVOT Upper Limits
  87. GRB 160411A: Fermi GBM detection
  88. Konus-Wind observation of GRB 160410A (short/hard)
  89. GRB 160410A: TAROT La Silla observatory early optical observations
  90. GRB 160411A: Swift-XRT refined Analysis
  91. GRB 160411A: MASTER-NET early optical observations.
  92. GRB 160411A: Enhanced Swift-XRT position
  93. GRB 160410A: Swift-XRT refined Analysis
  94. GRB 160411A: Swift-XRT observations
  95. GRB 160411A: Swift detection of a short burst
  96. GRB 160410A: Keck-I/LRIS redshift
  97. GRB 160410A: Skynet PROMPT-CTIO observations of the optical afterglow
  98. GRB 160410A: Swift-BAT refined analysis of the short GRB
  99. GRB 160410A: Swift/UVOT Detection
  100. GRB 160410A: Enhanced Swift-XRT position

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