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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"

24416 results found.

  1. GRB 060110: XRT position and analysis
  2. GRB 060116 : Lulin optical limit
  3. GRB 060116: ROTSE-III Optical Limits
  4. GRB060116: Faulkes North observation
  5. GRB 060115: Refined analysis of the Swift-BAT burst
  6. GRB 060114: REM observations
  7. GRB 060114: Swift/UVOT Observations
  8. GRB 060115: Swift detection of a burst
  9. GRB 060114: refined position
  10. GRB 060114: A long GRB detected by INTEGRAL
  11. GRB060114: Faulkes North observation
  12. GRB 060108: Evidence for an XRT Position Offset
  13. GRB 060111B: Refined analysis of the Swift-BAT burst
  14. GRB 060111B: Gualba observatory limit
  15. GRB 060111B: ROTSE-III Detection of Optical Counterpart Flare
  16. GRB 060111: Swift-BAT Refined Analysis
  17. GRB060111.2:_MASTER optical limit
  18. GRB 060111: ROTSE-III Optical Limits
  19. GRB 060110: Swift-BAT refined analysis
  20. GRB 060109: Swift-BAT refined analysis
  21. GRB 060108: z-band imaging from Gemini-North
  22. GRB 060110: ROTSE-III Confirmation of Optical Counterpart
  23. GRB 060110: Correction
  24. GRB060108: Faulkes Telescope observation
  25. GRB 060108: Refined analysis of the Swift-BAT burst
  26. GRB060108: Swift detection of its 100th GRB
  27. Konus-Wind observation of GRB 060105
  28. GRB 060105: Mitsume optical observations
  29. GRB 060105: BAT refined analysis
  30. Swift-BAT trigger 175653 is not an astrophysical source
  31. Swift-BAT trigger 175653 is probably not a GRB
  32. GRB 060102: Swift-BAT refined analysis
  33. Time Correction to GRB 060102
  34. GRB 060102: Swift-BAT detection of a burst
  35. GRB051211B: optical observations
  36. GRB 051227: Magellan r'-band Imaging/Astrometry
  37. GRB 051227: XRT refined analysis
  38. GRB 051227: Swift detection of a burst
  39. GRB051117B: optical observation
  40. IBAS_alert n. 2719 : not a real GRB
  41. Konus-Wind observation of GRB 051221A
  42. GRB051221A: Suzaku WAM observation of the prompt emission
  43. GRB 051221A: MDM Optical Observations
  44. GRB051016: analysis of the XMM-Newton observation
  45. GRB 051221A: Refined spectral and temporal analysis of the Swift-BAT short hard burst
  46. GRB 051221B: ROTSE-III Optical Limits
  47. Possible GRB 051221B: MDM Optical Detection
  48. GRB 051221B: BOOTES optical observations.
  49. Swift-BAT detection of a possible burst
  50. GRB 051221: Improved astrometry of the IR counterpart
  51. GRB 051221: Refined analysis of the Swift-BAT short hard burst
  52. GRB051211A (=H3979): Refined Analysis
  53. GRB051211A: possible optical candidate
  54. GRB 051215: near-infrared observations
  55. GRB051105: optical observations
  56. GRB 051213: Swift-BAT refined analysis
  57. GRB051211B, RBO optical observations
  58. GRB051211B: Liverpool Telescope observation
  59. GRB 051211B: Swift XRT Observations
  60. GRB 051210: Magellan Imaging
  61. GRB 051211B: a long GRB detected by INTEGRAL
  62. GRB 051211: Swift XRT upper limit
  63. GRB 051211:IAC80 optical observations
  64. HETE SXC localization of GRB 051211 (=H3979)
  65. GRB 051210: Swift-BAT refined analysis of a short burst
  66. IPN observations of SGR1806-20
  67. Swift XRT positions
  68. An extraordinary long burst on December 3 from SGR1806-20
  69. IBAS Alert 2706 : not a real GRB
  70. Possible resuming of the SGR 1806-20 activity
  71. GRB051117B: optical observation
  72. GRB051111: optical observaion
  73. Swift-BAT trigger 165579 is not a GRB
  74. GRB 051127: Swift-BAT detection of a possible burst
  75. GRB051117B: Swift XRT refined analysis
  76. GRB051117b: No Swift/UVOT Detection
  77. GRB051111: Suzaku WAM observation of the prompt emission
  78. GRB051111: Rc optical observations
  79. GRB051008: Suzaku WAM observation of the prompt emission
  80. GRB 051117B: MARGE Optical Limits
  81. GRB 051117B,optical observation
  82. GRB 051117B: Optical observations
  83. GRB 051117B: ROTSE-III Optical Limits
  84. GRB 051114: Swift-BAT refined analysis
  85. GRB051109A optical observations
  86. GRB 051113: Swift-BAT refined analysis
  87. GRB051111: Swift/UVOT Observations
  88. GRB 051111: Swift-BAT refined analysis
  89. GRB 051109A Optical Observations
  90. GRB051111a: SARA Observations
  91. GRB 051111A: KAIT optical observations
  92. GRB051111: Super-LOTIS Early Detection
  93. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  94. Konus-Wind observation of GRB 051109A
  95. GRB 051109B: Swift-BAT refined analysis
  96. GRB 051109B: ROTSE-III Optical Limits
  97. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  98. GRB051109B: no UVOT source detected
  99. GRB 051109B Kiso optical follow-up observation
  100. GRB051105B: REM Optical observation

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