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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"

19670 results found.

  1. GRB 061126, Swift-BAT refined analysis
  2. GRB 061126: Faulkes Telescope North Optical Observations
  3. GRB 061126: Swift/UVOT Afterglow Detection
  4. GRB 061126: XRT position
  5. GRB 061126: Swift detection of a burst
  6. GRB 061122: Confirmation of X-ray/Optical Afterglow
  7. GRB 061122: Candidate Optical Afterglow
  8. GRB 061121: Ep,i - Eiso correlation
  9. GRB061122: Swift/UVOT Optical Observations
  10. GRB061122: Swift-XRT position
  11. GRB 061121 declared "Burst of Interest" by Swift team
  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. Swift-BAT triggers 238544 and 238546 are not GRBs
  23. Swift TOO observations of GRB061110A
  24. Swift/UVOT Upper Limits for GRB061110b
  25. Swift/UVOT Upper Limits for GRB061110a
  26. GRB 061110B: Swift XRT refined analysis
  27. GRB 061110B, Swift-BAT refined analysis
  28. GRB061110B: Optical observations at Crni Vrh
  29. GRB 061110A: Swift XRT refined analysis
  30. GRB 061110B: Swift/XRT position
  31. GRB 061110B: Swift-UVOT Initial Observation
  32. GRB 061110A, Swift-BAT refined analysis
  33. GRB 061110B: TAROT Calern observatory optical observations
  34. GRB 061110B: Swift detection of a burst
  35. GRB 061110: ROTSE-III Optical Limits
  36. GRB 061110: Swift detection of a burst
  37. Swift-BAT Trigger 237821 is a Cosmic Ray Shower event
  38. GRB 061109: TAROT Calern observatory optical observations
  39. GRB 061109: Swift detection of a possible burst
  40. GRB061028: MAGIC telescope GeV observation
  41. GRB 061027: TAROT La Silla observatory optical observations
  42. GRB 061028: Swift/XRT Astrometry Correction
  43. GRB 061102: Swift/UVOT Magnitude Upper Limits
  44. GRB 061102, XRT refined analysis
  45. Swift-BAT Trigger 236481 is a Cosmic Ray Shower event
  46. GRB061102B: Super-LOTIS observations
  47. GRB 061028: Optical R passband observations
  48. GRB 061102B: Swift detection of a possible burst
  49. GRB 061102, Swift-BAT refined analysis
  50. GRB 061102: Swift detection of a burst
  51. GRB 061028: VLA Observation
  52. GRB 061004: Swift/XRT Astrometry Correction
  53. GRB 060801: Swift/XRT Astrometry Correction
  54. GRB 061028: MDM Observations
  55. GRB 061028: SARA upper limit
  56. GRB061028: XRT refined analysis
  57. GRB 061028: Swift/UVOT Observations
  58. GRB 061028, Swift-BAT refined analysis
  59. GRB 061028: TAROT Calern observatory optical observations
  60. GRB 061028: Swift detection of a burst
  61. GRB 061027, Swift refined analysis of a possible burst
  62. GRB 061027: Swift detection of a possible burst
  63. GRB061025: Swift XRT refined analysis
  64. GRB061025: Swift/UVOT observations
  65. GRB061025: Swift XRT position
  66. Swift XRT boresight update
  67. GRB 061021, Swift-BAT Lag analysis
  68. Konus-Wind observation of GRB 061021
  69. GRB 061021: Swift-XRT refined analysis
  70. GRB 061021: Swift/UVOT Observation
  71. GRB 061021, Swift-BAT refined analysis
  72. GRB 061021: Swift detection of a burst
  73. GRB 061019: Super-LOTIS upper limit
  74. GRB 061019: SARA upper limit
  75. GRB 061019: dust-scattered X-ray halo detected in Swift/XRT
  76. GRB 061019: Swift/UVOT upper limit
  77. GRB061019: Swift XRT refined analysis
  78. GRB 061019, Swift-BAT refined analysis
  79. GRB 061019: TAROT La Silla observatory optical observations
  80. GRB061019: Swift/XRT position
  81. GRB 061019: Swift-BAT detection of a burst
  82. GRB 061006: astrometry-corrected XRT position
  83. Konus-Wind observation of GRB 061007
  84. GRB 060928: Confirmation of the X-ray afterglow detected by Swift
  85. GRB061007: Swift UVOT followup observations
  86. GRB 061007: Magellan Spectroscopy
  87. GRB 061007: Correction to GCN 5712
  88. GRB 061007: Swift-BAT refined analysis
  89. GRB 061007: Swift XRT refined analysis
  90. GRB 061006: Swift/UVOT optical observations
  91. Konus-Wind observation of the short hard GRB 061006
  92. GRB 061007 - Faulkes Telescope South Afterglow Confirmation
  93. GRB 061007: Swift detection of a burst with an optical counterpart
  94. GRB 061007: ROTSE-III Detection of Optical Counterpart
  95. GRB 061006: Swift-BAT refined analysis of the short-hard burst
  96. GRB 061006: Swift-XRT Team Refined Analysis
  97. GRB061006 (Swift 232585) might be a short-hard GRB
  98. GRB061006: Faulkes Telescope South Observations
  99. GRB 061006: Swift detection of a burst
  100. GRB061004: Swift/UVOT optical observations

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