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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"

29074 results found.

  1. GRB 060323: Optical Observations
  2. GRB 060323: Refined analysis of the Swift-BAT burst
  3. GRB 060323: Swift XRT refined analysis
  4. GRB 060322: Refined analysis of the Swift-BAT burst
  5. GRB060323 - SDSS Pre-Burst Observations
  6. GRB 060323: Swift detection of a burst with a possible optical afterglow
  7. GRB 060322: Swift-BAT detection of a 200-sec burst
  8. GRB060319: Swift XRT refined analysis
  9. GRB060319: Swift/UVOT upper limits
  10. GRB 060319: Swift-BAT refined analysis
  11. GRB 060319: Swift detection of a burst
  12. Konus-Wind observation of GRB 060313
  13. GRB 060313: Further analysis of the Swift-BAT bright short hard burst
  14. GRB 060313: Swift/UVOT Observations
  15. GRB 060313: Swift-XRT team refined analysis
  16. GRB 060313: Refined analysis of the Swift-BAT bright short hard burst
  17. GRB 060313: Swift-BAT detection of a bright short hard burst
  18. GRB060218: SARA Observations of SN2006aj
  19. GRB060312: Swift UVOT observation
  20. GRB 060312: Refined analysis of the Swift-BAT burst
  21. GRB 060312: Swift XRT team refined analysis
  22. GRB060306: APO Ks-band Imaging Observations
  23. GRB 060312: ROTSE-III Optical Limits
  24. GRB 060312: Swift detection of a burst
  25. GRB060219: Liverpool Telescope observations
  26. GRB060218: analysis of the XMM-Newton observation
  27. Swift/UVOT observations of GRB060306
  28. GRB 060306: Swift-BAT refined analysis
  29. GRB 060306: Swift-XRT team refined analysis
  30. GRB 060306: Swift detection of a bright burst
  31. GRB 060223b: Swift/UVOT Upper Limits
  32. GRB 060223B: Swift XRT possible afterglow
  33. GRB 060204B: GETS early limit
  34. GRB 060223A:Xinglong optical limits
  35. GRB 060223B: ART optical limits
  36. GRB 060223B: Swift-BAT refined analysis
  37. GRB 060223a: Swift/UVOT refined analysis
  38. GRB 060218/SN 2006aj: Swift-BAT fluence and peak flux
  39. GRB 060223B: Swift detection of a bright burst
  40. GRB 060223: Swift-BAT refined analysis
  41. GRB 060218: rebrightening
  42. GRB 060223: Swift/UVOT Confirmation of Optical Afterglow
  43. GRB 060223: Swift detection of a burst
  44. GRB 060219: Swift-BAT refined analysis
  45. GRB 060218: Further refined analysis of the Swift-BAT burst
  46. GRB 060218: Optical Observations at Xinglong Obs.
  47. GRB060218: UV Detection and Light Curves
  48. GRB060219: SARA Observations
  49. GRB 060219: Swift/UVOT Upper Limits
  50. GRB 060219: Swift-XRT Team refined analysis
  51. GRB 051221B: Swift-XRT Team Refined Analysis
  52. GRB 060219: Partial refined analysis of the Swift-BAT burst
  53. GRB 060219: Swift-BAT detection of a weak burst
  54. GRB060218: Swift/XRT Team preliminary analysis of the possible burst
  55. Brightening of the Optical Counterpart of the Possible GRB 060218
  56. GRB 060218: Pre-burst detection of a possible host galaxy
  57. GRB 060218A: ROTSE-III Possible Optical Flare
  58. GRB060218: Swift/XRT refined position of a possible burst
  59. Preliminary refined analysis of the Swift-BAT trigger 191157
  60. Further UVOT Observations of the Candidate Optical Afterglow for GRB 060218
  61. GRB 060211B: Swift/UVOT Upper Limits
  62. GRB 060218: Swift XRT Position
  63. GRB 060218: Swift-BAT detection of a possible burst
  64. GRB060213: Swift XRT observations and possible afterglow candidate
  65. GRB 060211b: WIRO NIR Observations
  66. GRB 060211a: WIRO NIR Observations
  67. GRB 060211A: Further refined analysis of the Swift burst
  68. GRB 060211A: Partial refined analysis on the Swift-BAT burst
  69. GRB 060210: Further refined analysis of the Swift-BAT burst
  70. GRB 060211B: Swift/BAT refined analysis
  71. GRB060210: Swift/UVOT Upper Limits
  72. GRB 060211B: Swift-XRT Team refined analysis
  73. GRB 060210: Optical Observations
  74. GRB 060211A: Swift XRT Team Refined Analysis
  75. GRB 060211B: Swift-BAT detection of a burst
  76. GRB060211: Faulkes North observation
  77. GRB 060211: Swift detection of a long burst
  78. GRB 060210: Refined analysis of the Swift-BAT burst
  79. GRB060210: Swift XRT Refined Analysis
  80. GRB060210: Early Optical Observations
  81. GRB060210:Faulkes Telescope North Afterglow Confirmation
  82. GRB 060210: candidate afterglow
  83. GRB 060210: Swift detection of a burst
  84. GRB060210: Optical afterglow
  85. GRB 060206: Swift/UVOT Observations
  86. Swift-BAT trigger 180931 is not a GRB
  87. GRB060209: RTT150 optical observations
  88. GRB 060209 : TAROT optical observation
  89. GRB 060209(?): Swift-BAT detection of a possible burst
  90. GRB 060203: Swift/UVOT upper limits
  91. GRB 060121 : WIDGET Pre-trigger limit
  92. GRB 060206: IR Detection of the Afterglow
  93. GRB060204A: Swift/UVOT observations
  94. GRB 060206: Swift-BAT refined analysis
  95. GRB060206: Swift XRT Refined Analysis
  96. GRB060206: Liverpool Telescope observation
  97. GRB060206: P60 Optical Observations
  98. GRB060206: SARA Detection
  99. GRB 060206: RAPTOR observations of afterglow candidate variability.
  100. GRB060204a: Swift XRT Detection of an Afterglow Candidate

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