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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"

27135 results found.

  1. GRB 061126, Swift-BAT refined analysis
  2. GRB 061126: SARA Observations
  3. GRB 061126: Early Detection of the IR Afterglow
  4. GRB 061126: Faulkes Telescope North Optical Observations
  5. GRB 061126: Swift/UVOT Afterglow Detection
  6. GRB 061126: XRT position
  7. GRB 061126: Swift detection of a burst
  8. GRB 061121: Ep,i - Eiso correlation
  9. GRB061122: Swift/UVOT Optical Observations
  10. GRB 061121: ART detection in Ic
  11. GRB061122: Swift-XRT position
  12. Konus-Wind and Konus-A observations of GRB 061121
  13. Swift-BAT trigger 239987 is not a GRB
  14. GRB 061121: Swift/UVOT Observations
  15. GRB 061121: Swift-XRT Team Refined Analysis
  16. GRB 061121, Swift-BAT refined analysis
  17. GRB061121, optical observation
  18. GRB 061121: Faulkes Telescope North Optical Observation
  19. GRB 061121: ROTSE-III Confirmation of Optical Counterpart
  20. GRB 061121: Swift detection of a bright burst with an optical counterpart
  21. GRB 060111B: Swift UVOT Refined Magnitudes
  22. GRB 061110B: NIR Observations
  23. Swift/UVOT Upper Limits for GRB061110b
  24. Swift/UVOT Upper Limits for GRB061110a
  25. GRB 061110B, Swift-BAT refined analysis
  26. GRB061110B: Optical observations at Crni Vrh
  27. GRB 061110B : Liverpool Telescope Optical Afterglow Detection
  28. GRB 061110B: Swift-UVOT Initial Observation
  29. GRB 061110A, Swift-BAT refined analysis
  30. GRB 061110B: TAROT Calern observatory optical observations
  31. GRB 061110B: Swift detection of a burst
  32. GRB 061110: ROTSE-III Optical Limits
  33. GRB 061110: Swift detection of a burst
  34. Swift-BAT Trigger 237821 is a Cosmic Ray Shower event
  35. GRB 061109: optical observation
  36. GRB 061109: TAROT Calern observatory optical observations
  37. GRB 061109: Swift detection of a possible burst
  38. GRB 061027: TAROT La Silla observatory optical observations
  39. GRB 061102: Swift/UVOT Magnitude Upper Limits
  40. GRB 061102, XRT refined analysis
  41. Swift-BAT Trigger 236481 is a Cosmic Ray Shower event
  42. GRB061102B: Super-LOTIS observations
  43. GRB 061028: Optical R passband observations
  44. GRB 061102B: Swift detection of a possible burst
  45. GRB 061102, Swift-BAT refined analysis
  46. GRB 061102: Swift detection of a burst
  47. GRB 061028: MDM Observations
  48. GRB 061028: SARA upper limit
  49. GRB 061028: z band imaging
  50. GRB061028: XRT refined analysis
  51. GRB 061028: Swift/UVOT Observations
  52. GRB 061028, Swift-BAT refined analysis
  53. GRB 061028: TAROT Calern observatory late optical observations
  54. GRB 061028: TAROT Calern observatory optical observations
  55. GRB 061028: Swift detection of a burst
  56. GRB 061027, Swift refined analysis of a possible burst
  57. GRB 061027: Swift detection of a possible burst
  58. GRB061025: Swift XRT refined analysis
  59. GRB061025: Swift/UVOT observations
  60. GRB 061019: MITSuME upper limits
  61. GRB 061025: ROTSE-III Optical Limits
  62. GRB 061021, Swift-BAT Lag analysis
  63. Konus-Wind observation of GRB 061021
  64. GRB 061021: Swift-XRT refined analysis
  65. GRB 061021: Swift/UVOT Observation
  66. GRB 061021, Swift-BAT refined analysis
  67. GRB 061021: Swift detection of a burst
  68. GRB 061019: Super-LOTIS upper limit
  69. GRB 061019: SARA upper limit
  70. GRB 061019: dust-scattered X-ray halo detected in Swift/XRT
  71. GRB 061019: Swift/UVOT upper limit
  72. GRB 061019, Swift-BAT refined analysis
  73. GRB 061019: TAROT La Silla observatory optical observations
  74. GRB061019: Swift/XRT position
  75. GRB 061019: Swift-BAT detection of a burst
  76. GRB 061007: Suzaku/WAM observation of the prompt emission
  77. Konus-Wind observation of GRB 061007
  78. GRB 060928: Confirmation of the X-ray afterglow detected by Swift
  79. GRB061007: Swift UVOT followup observations
  80. GRB 061006 : Suzaku/WAM observation of the prompt emission
  81. GRB 061007: Magellan Spectroscopy
  82. GRB 061007: Swift-BAT refined analysis
  83. GRB 061006: Swift/UVOT optical observations
  84. Konus-Wind observation of the short hard GRB 061006
  85. GRB 061007 - FTS early brightening and power law decay
  86. GRB 061007 - Faulkes Telescope South Afterglow Confirmation
  87. GRB 061007: Swift detection of a burst with an optical counterpart
  88. GRB 061007: ROTSE-III Detection of Optical Counterpart
  89. GRB 061006: Swift-BAT refined analysis of the short-hard burst
  90. GRB 061006: Swift detection of a burst
  91. GRB061004: Swift/UVOT optical observations
  92. GRB 061004: Swift-XRT Team Refined Analysis
  93. GRB 061004, Swift BAT refined analysis
  94. GRB 061004: Swift detection of a burst
  95. GRB 060928: Suzaku/WAM observation of the prompt emission
  96. IGR J08408-4503 (= V* LM Vel): Swift detection of a transient
  97. GRB 060928: Swift observations
  98. GRB 061002: Swift-XRT Team Refined Analysis
  99. GRB061002 - SDSS Pre-Burst Observations
  100. GRB 061002, Swift-BAT refined analysis

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