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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"

29094 results found.

  1. SGR 1900+14: Swift detection of an outburst
  2. GRB 060413: Refined analysis of the Swift-BAT burst
  3. GRB 060413: XRT refined analysis
  4. GRB 060413: No Optical Afterglow in Swift/UVOT TDRSS Data
  5. GRB 060413: Swift detection of a burst
  6. GRB060403: XRT refined analysis
  7. GRB 060403: Swift/UVOT upper limits
  8. GRB 060403: Refined analysis of the Swift-BAT burst
  9. Konus-Wind observation of the recent SGR 1900+14 activity. Will
  10. GRB 060403: Swift detection of a burst
  11. HETE trigger H4044: RTT150 optical observations
  12. HETE Trigger 4043: ROTSE-III Optical Limits
  13. SGR 1900+14: Swift-BAT detection of a cluster of outbursts
  14. SGR 1900+14: Swift-BAT detection of a bright outburst
  15. GRB 060323 : WIDGET simultaneous optical observations
  16. GRB 060323: Early optical observation at Xinglong
  17. SGR 1900+14: Refined Swift-BAT analysis of the renewed activity
  18. SGR 1900+14: Swift detection of renewed activity
  19. GRB 060322: Swift XRT afterglow candidate
  20. GRB 060323: Swift/UVOT Observations
  21. GRB 060323: Optical Observations
  22. GRB 060323: Refined analysis of the Swift-BAT burst
  23. GRB 060323: Swift XRT refined analysis
  24. GRB 060322: Refined analysis of the Swift-BAT burst
  25. GRB060323 - SDSS Pre-Burst Observations
  26. GRB 060323: Swift detection of a burst with a possible optical afterglow
  27. GRB 060322: Swift-BAT detection of a 200-sec burst
  28. GRB060319: Swift XRT refined analysis
  29. GRB060319: Swift/UVOT upper limits
  30. GRB 060319: Swift-BAT refined analysis
  31. GRB 060319: Swift detection of a burst
  32. Konus-Wind observation of GRB 060313
  33. GRB 060313: Further analysis of the Swift-BAT bright short hard burst
  34. GRB 060313: Swift/UVOT Observations
  35. GRB 060313: Swift-XRT team refined analysis
  36. GRB 060313: Refined analysis of the Swift-BAT bright short hard burst
  37. GRB 060313: Swift-BAT detection of a bright short hard burst
  38. GRB060218: SARA Observations of SN2006aj
  39. GRB060312: Swift UVOT observation
  40. GRB 060312: Refined analysis of the Swift-BAT burst
  41. GRB 060312: Swift XRT team refined analysis
  42. GRB060306: APO Ks-band Imaging Observations
  43. GRB 060312: ROTSE-III Optical Limits
  44. GRB 060312: Swift detection of a burst
  45. GRB060219: Liverpool Telescope observations
  46. GRB060218: analysis of the XMM-Newton observation
  47. Swift/UVOT observations of GRB060306
  48. GRB 060306: Swift-BAT refined analysis
  49. GRB 060306: Swift-XRT team refined analysis
  50. GRB 060306: Swift detection of a bright burst
  51. GRB 060223b: Swift/UVOT Upper Limits
  52. GRB 060223B: Swift XRT possible afterglow
  53. GRB 060204B: GETS early limit
  54. GRB 060223A:Xinglong optical limits
  55. GRB 060223B: ART optical limits
  56. GRB 060223B: Swift-BAT refined analysis
  57. GRB 060223a: Swift/UVOT refined analysis
  58. GRB 060218/SN 2006aj: Swift-BAT fluence and peak flux
  59. GRB 060223B: Swift detection of a bright burst
  60. GRB 060223: Swift-BAT refined analysis
  61. GRB 060218: rebrightening
  62. GRB 060223: Swift/UVOT Confirmation of Optical Afterglow
  63. GRB 060223: Swift detection of a burst
  64. GRB 060219: Swift-BAT refined analysis
  65. GRB 060218: Further refined analysis of the Swift-BAT burst
  66. GRB 060218: Optical Observations at Xinglong Obs.
  67. GRB060218: UV Detection and Light Curves
  68. GRB060219: SARA Observations
  69. GRB 060219: Swift/UVOT Upper Limits
  70. GRB 060219: Swift-XRT Team refined analysis
  71. GRB 051221B: Swift-XRT Team Refined Analysis
  72. GRB 060219: Partial refined analysis of the Swift-BAT burst
  73. GRB 060219: Swift-BAT detection of a weak burst
  74. GRB060218: Swift/XRT Team preliminary analysis of the possible burst
  75. Brightening of the Optical Counterpart of the Possible GRB 060218
  76. GRB 060218: Pre-burst detection of a possible host galaxy
  77. GRB 060218A: ROTSE-III Possible Optical Flare
  78. GRB060218: Swift/XRT refined position of a possible burst
  79. Preliminary refined analysis of the Swift-BAT trigger 191157
  80. Further UVOT Observations of the Candidate Optical Afterglow for GRB 060218
  81. GRB 060211B: Swift/UVOT Upper Limits
  82. GRB 060218: Swift XRT Position
  83. GRB 060218: Swift-BAT detection of a possible burst
  84. GRB060213: Swift XRT observations and possible afterglow candidate
  85. GRB 060211b: WIRO NIR Observations
  86. GRB 060211a: WIRO NIR Observations
  87. GRB 060211A: Further refined analysis of the Swift burst
  88. GRB 060211A: Partial refined analysis on the Swift-BAT burst
  89. GRB 060210: Further refined analysis of the Swift-BAT burst
  90. GRB 060211B: Swift/BAT refined analysis
  91. GRB060210: Swift/UVOT Upper Limits
  92. GRB 060211B: Swift-XRT Team refined analysis
  93. GRB 060210: Optical Observations
  94. GRB 060211A: Swift XRT Team Refined Analysis
  95. GRB 060211B: Swift-BAT detection of a burst
  96. GRB060211: Faulkes North observation
  97. GRB 060211: Swift detection of a long burst
  98. GRB 060210: Refined analysis of the Swift-BAT burst
  99. GRB060210: Swift XRT Refined Analysis
  100. GRB060210: Early Optical Observations

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