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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"

19607 results found.

  1. GRB 061027: Swift detection of a possible burst
  2. GRB061025: Swift XRT refined analysis
  3. GRB061025: Swift/UVOT observations
  4. GRB061025: Swift XRT position
  5. Swift XRT boresight update
  6. GRB 061021, Swift-BAT Lag analysis
  7. Konus-Wind observation of GRB 061021
  8. GRB 061021: Swift-XRT refined analysis
  9. GRB 061021: Swift/UVOT Observation
  10. GRB 061021, Swift-BAT refined analysis
  11. GRB 061021: Swift detection of a burst
  12. GRB 061019: Super-LOTIS upper limit
  13. GRB 061019: SARA upper limit
  14. GRB 061019: dust-scattered X-ray halo detected in Swift/XRT
  15. GRB 061019: Swift/UVOT upper limit
  16. GRB061019: Swift XRT refined analysis
  17. GRB 061019, Swift-BAT refined analysis
  18. GRB 061019: TAROT La Silla observatory optical observations
  19. GRB061019: Swift/XRT position
  20. GRB 061019: Swift-BAT detection of a burst
  21. GRB 061006: astrometry-corrected XRT position
  22. Konus-Wind observation of GRB 061007
  23. GRB 060928: Confirmation of the X-ray afterglow detected by Swift
  24. GRB061007: Swift UVOT followup observations
  25. GRB 061007: Magellan Spectroscopy
  26. GRB 061007: Correction to GCN 5712
  27. GRB 061007: Swift-BAT refined analysis
  28. GRB 061007: Swift XRT refined analysis
  29. GRB 061006: Swift/UVOT optical observations
  30. Konus-Wind observation of the short hard GRB 061006
  31. GRB 061007 - Faulkes Telescope South Afterglow Confirmation
  32. GRB 061007: Swift detection of a burst with an optical counterpart
  33. GRB 061007: ROTSE-III Detection of Optical Counterpart
  34. GRB 061006: Swift-BAT refined analysis of the short-hard burst
  35. GRB 061006: Swift-XRT Team Refined Analysis
  36. GRB061006 (Swift 232585) might be a short-hard GRB
  37. GRB061006: Faulkes Telescope South Observations
  38. GRB 061006: Swift detection of a burst
  39. GRB061004: Swift/UVOT optical observations
  40. GRB 061004: Swift-XRT Team Refined Analysis
  41. GRB 061004, Swift BAT refined analysis
  42. GRB 061004: Swift detection of a burst
  43. IGR J08408-4503 (= V* LM Vel): Swift detection of a transient
  44. GRB 060928: Swift observations
  45. IPN triangulation of GRB060928 (long, exceptionally bright)
  46. GRB061002: Swift UVOT followup observations
  47. GRB 061002: Swift-XRT Team Refined Analysis
  48. GRB 061002, Swift-BAT refined analysis
  49. GRB061002: MASTER-VWF-Kislovodsk observations
  50. GRB 061002: Swift detection of a burst: CORRECTED CONTENT
  51. GRB 061002: Swift detection of a burst
  52. GRB 060929: Further XRT Refined Analysis
  53. GRB 060929: Swift/UVOT Optical Observations
  54. GRB060929: Swift-XRT refined analysis.
  55. GRB 060929, Swift-BAT further refined analysis - late-time flare
  56. GRB 060929, Swift-BAT refined analysis
  57. GRB 060929: BART observation
  58. GRB 060929: MASTER-VWF-Kislovodsk observations
  59. GRB 060929: BOOTES-IR & OSN observations
  60. Liverpool Telescope observations of GRB 060929
  61. GRB 060929: Swift detection of a burst
  62. GRB 060729: An update on the late-time Swift observations
  63. GRB 060926: Swift-UVOT UVW1 Detection Retraction
  64. GRB 060927: pseudo-z from spectral parameters of the prompt emission
  65. GRB 060927: Swift/UVOT Optical Observations
  66. GRB 060927: Swift XRT Team refined analysis
  67. GRB 060927, Swift-BAT refined analysis
  68. GRB060927: Faulkes Telescope South observation
  69. GRB060927 - SDSS Pre-Burst Observations
  70. GRB 060927A: ROTSE-III Detection of Optical Counterpart
  71. Swift XRT boresight
  72. GRB 060927: Swift detection of a burst
  73. GRB060926: VLT redshift
  74. GRB 060926: Swift-UVOT Detections
  75. GRB 060926: Swift XRT refined analysis
  76. GRB 060926, Swift-BAT refined analysis
  77. GRB 060926: RTT150, UVOT afterglow candidate confirmation
  78. GRB 060926: BOOTES-IR observations
  79. GRB060926 OPTIMA-Burst optical observation
  80. GRB 060926: Swift detection of a burst
  81. GRB 060923C, Swift-BAT refined analysis
  82. GRB 060923C: VLA Observation
  83. GRB 060923A: Gemini Second Epoch and Afterglow Confirmation
  84. GRB060923B: Swift/UVOT upper limits
  85. GRB 060923B: Swift XRT Refined Analysis
  86. GRB 060923C: Swift XRT refined analysis
  87. GRB 060923C, Swift-BAT partial refined analysis
  88. GRB 060923A: Swift XRT refined analysis
  89. GRB 060923A: Keck and Gemini Observations
  90. GRB 060923B, Swift-BAT refined analysis
  91. GRB060923C : Faulkes Telescope South optical limits
  92. GRB060923C: Faulkes Telescope North optical observations
  93. GRB 060923C: Swift detection of a burst
  94. GRB 060923B: Swift detection of a burst
  95. GRB 060923, Swift-BAT refined analysis
  96. GRB 060923: Early Super-LOTIS Observations
  97. GRB060923: Faulkes Telescope North optical observations
  98. GRB 060923: KAIT observations
  99. GRB 060923: Swift detection of a burst
  100. Swift detection of IGR J17497-2821 (trigger 230504)

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