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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"

19643 results found.

  1. GRB 061110B: Swift XRT refined analysis
  2. GRB 061110B, Swift-BAT refined analysis
  3. GRB061110B: Optical observations at Crni Vrh
  4. GRB 061110A: Swift XRT refined analysis
  5. GRB 061110B: Swift/XRT position
  6. GRB 061110B: Swift-UVOT Initial Observation
  7. GRB 061110A, Swift-BAT refined analysis
  8. GRB 061110B: TAROT Calern observatory optical observations
  9. GRB 061110B: Swift detection of a burst
  10. GRB 061110: ROTSE-III Optical Limits
  11. GRB 061110: Swift detection of a burst
  12. Swift-BAT Trigger 237821 is a Cosmic Ray Shower event
  13. GRB 061109: TAROT Calern observatory optical observations
  14. GRB 061109: Swift detection of a possible burst
  15. GRB061028: MAGIC telescope GeV observation
  16. GRB 061027: TAROT La Silla observatory optical observations
  17. GRB 061028: Swift/XRT Astrometry Correction
  18. GRB 061102: Swift/UVOT Magnitude Upper Limits
  19. GRB 061102, XRT refined analysis
  20. Swift-BAT Trigger 236481 is a Cosmic Ray Shower event
  21. GRB061102B: Super-LOTIS observations
  22. GRB 061028: Optical R passband observations
  23. GRB 061102B: Swift detection of a possible burst
  24. GRB 061102, Swift-BAT refined analysis
  25. GRB 061102: Swift detection of a burst
  26. GRB 061028: VLA Observation
  27. GRB 061004: Swift/XRT Astrometry Correction
  28. GRB 060801: Swift/XRT Astrometry Correction
  29. GRB 061028: MDM Observations
  30. GRB 061028: SARA upper limit
  31. GRB061028: XRT refined analysis
  32. GRB 061028: Swift/UVOT Observations
  33. GRB 061028, Swift-BAT refined analysis
  34. GRB 061028: TAROT Calern observatory optical observations
  35. GRB 061028: Swift detection of a burst
  36. GRB 061027, Swift refined analysis of a possible burst
  37. GRB 061027: Swift detection of a possible burst
  38. GRB061025: Swift XRT refined analysis
  39. GRB061025: Swift/UVOT observations
  40. GRB061025: Swift XRT position
  41. Swift XRT boresight update
  42. GRB 061021, Swift-BAT Lag analysis
  43. Konus-Wind observation of GRB 061021
  44. GRB 061021: Swift-XRT refined analysis
  45. GRB 061021: Swift/UVOT Observation
  46. GRB 061021, Swift-BAT refined analysis
  47. GRB 061021: Swift detection of a burst
  48. GRB 061019: Super-LOTIS upper limit
  49. GRB 061019: SARA upper limit
  50. GRB 061019: dust-scattered X-ray halo detected in Swift/XRT
  51. GRB 061019: Swift/UVOT upper limit
  52. GRB061019: Swift XRT refined analysis
  53. GRB 061019, Swift-BAT refined analysis
  54. GRB 061019: TAROT La Silla observatory optical observations
  55. GRB061019: Swift/XRT position
  56. GRB 061019: Swift-BAT detection of a burst
  57. GRB 061006: astrometry-corrected XRT position
  58. Konus-Wind observation of GRB 061007
  59. GRB 060928: Confirmation of the X-ray afterglow detected by Swift
  60. GRB061007: Swift UVOT followup observations
  61. GRB 061007: Magellan Spectroscopy
  62. GRB 061007: Correction to GCN 5712
  63. GRB 061007: Swift-BAT refined analysis
  64. GRB 061007: Swift XRT refined analysis
  65. GRB 061006: Swift/UVOT optical observations
  66. Konus-Wind observation of the short hard GRB 061006
  67. GRB 061007 - Faulkes Telescope South Afterglow Confirmation
  68. GRB 061007: Swift detection of a burst with an optical counterpart
  69. GRB 061007: ROTSE-III Detection of Optical Counterpart
  70. GRB 061006: Swift-BAT refined analysis of the short-hard burst
  71. GRB 061006: Swift-XRT Team Refined Analysis
  72. GRB061006 (Swift 232585) might be a short-hard GRB
  73. GRB061006: Faulkes Telescope South Observations
  74. GRB 061006: Swift detection of a burst
  75. GRB061004: Swift/UVOT optical observations
  76. GRB 061004: Swift-XRT Team Refined Analysis
  77. GRB 061004, Swift BAT refined analysis
  78. GRB 061004: Swift detection of a burst
  79. IGR J08408-4503 (= V* LM Vel): Swift detection of a transient
  80. GRB 060928: Swift observations
  81. IPN triangulation of GRB060928 (long, exceptionally bright)
  82. GRB061002: Swift UVOT followup observations
  83. GRB 061002: Swift-XRT Team Refined Analysis
  84. GRB 061002, Swift-BAT refined analysis
  85. GRB061002: MASTER-VWF-Kislovodsk observations
  86. GRB 061002: Swift detection of a burst: CORRECTED CONTENT
  87. GRB 061002: Swift detection of a burst
  88. GRB 060929: Further XRT Refined Analysis
  89. GRB 060929: Swift/UVOT Optical Observations
  90. GRB060929: Swift-XRT refined analysis.
  91. GRB 060929, Swift-BAT further refined analysis - late-time flare
  92. GRB 060929, Swift-BAT refined analysis
  93. GRB 060929: BART observation
  94. GRB 060929: MASTER-VWF-Kislovodsk observations
  95. GRB 060929: BOOTES-IR & OSN observations
  96. Liverpool Telescope observations of GRB 060929
  97. GRB 060929: Swift detection of a burst
  98. GRB 060729: An update on the late-time Swift observations
  99. GRB 060926: Swift-UVOT UVW1 Detection Retraction
  100. GRB 060927: pseudo-z from spectral parameters of the prompt emission

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