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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 061122: Candidate Optical Afterglow
  2. GRB 061121: Ep,i - Eiso correlation
  3. GRB061122: Swift/UVOT Optical Observations
  4. GRB061122: Swift-XRT position
  5. GRB 061121 declared "Burst of Interest" by Swift team
  6. Konus-Wind and Konus-A observations of GRB 061121
  7. Swift-BAT trigger 239987 is not a GRB
  8. GRB 061121: Swift/UVOT Observations
  9. GRB 061121: Swift-XRT Team Refined Analysis
  10. GRB 061121, Swift-BAT refined analysis
  11. GRB061121, optical observation
  12. GRB 061121: Faulkes Telescope North Optical Observation
  13. GRB 061121: ROTSE-III Confirmation of Optical Counterpart
  14. GRB 061121: Swift detection of a bright burst with an optical counterpart
  15. GRB 060111B: Swift UVOT Refined Magnitudes
  16. Swift-BAT triggers 238544 and 238546 are not GRBs
  17. Swift TOO observations of GRB061110A
  18. Swift/UVOT Upper Limits for GRB061110b
  19. Swift/UVOT Upper Limits for GRB061110a
  20. GRB 061110B: Swift XRT refined analysis
  21. GRB 061110B, Swift-BAT refined analysis
  22. GRB061110B: Optical observations at Crni Vrh
  23. GRB 061110A: Swift XRT refined analysis
  24. GRB 061110B: Swift/XRT position
  25. GRB 061110B: Swift-UVOT Initial Observation
  26. GRB 061110A, Swift-BAT refined analysis
  27. GRB 061110B: TAROT Calern observatory optical observations
  28. GRB 061110B: Swift detection of a burst
  29. GRB 061110: ROTSE-III Optical Limits
  30. GRB 061110: Swift detection of a burst
  31. Swift-BAT Trigger 237821 is a Cosmic Ray Shower event
  32. GRB 061109: TAROT Calern observatory optical observations
  33. GRB 061109: Swift detection of a possible burst
  34. GRB061028: MAGIC telescope GeV observation
  35. GRB 061027: TAROT La Silla observatory optical observations
  36. GRB 061028: Swift/XRT Astrometry Correction
  37. GRB 061102: Swift/UVOT Magnitude Upper Limits
  38. GRB 061102, XRT refined analysis
  39. Swift-BAT Trigger 236481 is a Cosmic Ray Shower event
  40. GRB061102B: Super-LOTIS observations
  41. GRB 061028: Optical R passband observations
  42. GRB 061102B: Swift detection of a possible burst
  43. GRB 061102, Swift-BAT refined analysis
  44. GRB 061102: Swift detection of a burst
  45. GRB 061028: VLA Observation
  46. GRB 061004: Swift/XRT Astrometry Correction
  47. GRB 060801: Swift/XRT Astrometry Correction
  48. GRB 061028: MDM Observations
  49. GRB 061028: SARA upper limit
  50. GRB061028: XRT refined analysis
  51. GRB 061028: Swift/UVOT Observations
  52. GRB 061028, Swift-BAT refined analysis
  53. GRB 061028: TAROT Calern observatory optical observations
  54. GRB 061028: Swift detection of a burst
  55. GRB 061027, Swift refined analysis of a possible burst
  56. GRB 061027: Swift detection of a possible burst
  57. GRB061025: Swift XRT refined analysis
  58. GRB061025: Swift/UVOT observations
  59. GRB061025: Swift XRT position
  60. Swift XRT boresight update
  61. GRB 061021, Swift-BAT Lag analysis
  62. Konus-Wind observation of GRB 061021
  63. GRB 061021: Swift-XRT refined analysis
  64. GRB 061021: Swift/UVOT Observation
  65. GRB 061021, Swift-BAT refined analysis
  66. GRB 061021: Swift detection of a burst
  67. GRB 061019: Super-LOTIS upper limit
  68. GRB 061019: SARA upper limit
  69. GRB 061019: dust-scattered X-ray halo detected in Swift/XRT
  70. GRB 061019: Swift/UVOT upper limit
  71. GRB061019: Swift XRT refined analysis
  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 061006: astrometry-corrected XRT position
  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 061007: Magellan Spectroscopy
  81. GRB 061007: Correction to GCN 5712
  82. GRB 061007: Swift-BAT refined analysis
  83. GRB 061007: Swift XRT refined analysis
  84. GRB 061006: Swift/UVOT optical observations
  85. Konus-Wind observation of the short hard GRB 061006
  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-XRT Team Refined Analysis
  91. GRB061006 (Swift 232585) might be a short-hard GRB
  92. GRB061006: Faulkes Telescope South Observations
  93. GRB 061006: Swift detection of a burst
  94. GRB061004: Swift/UVOT optical observations
  95. GRB 061004: Swift-XRT Team Refined Analysis
  96. GRB 061004, Swift BAT refined analysis
  97. GRB 061004: Swift detection of a burst
  98. IGR J08408-4503 (= V* LM Vel): Swift detection of a transient
  99. GRB 060928: Swift observations
  100. IPN triangulation of GRB060928 (long, exceptionally bright)

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