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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"

21471 results found.

  1. GRB 060218/SN 2006aj: Swift-BAT fluence and peak flux
  2. GRB 060223B: Swift detection of a bright burst
  3. GRB 060223: Swift-BAT refined analysis
  4. GRB 060223: Swift/UVOT Confirmation of Optical Afterglow
  5. GRB 060223: Swift detection of a burst
  6. GRB 060219: Swift-BAT refined analysis
  7. GRB 060218: Further refined analysis of the Swift-BAT burst
  8. GRB 060218: Likely an underluminous GRB
  9. GRB 060219: SDSS galaxy inside XRT error circle
  10. GRB060218: UV Detection and Light Curves
  11. GRB 060219: Swift/UVOT Upper Limits
  12. GRB 060219: Swift-XRT Team refined analysis
  13. GRB 051221B: Swift-XRT Team Refined Analysis
  14. GRB 060219: Partial refined analysis of the Swift-BAT burst
  15. GRB 060219: Swift-XRT position typo correction
  16. GRB 060219: Swift-XRT position
  17. GRB 060218: optical/nIR observations at La Palma
  18. GRB 060219: Swift-BAT detection of a weak burst
  19. Oddball GRB 060218, transient or GRB?
  20. GRB060218: Swift/XRT Team preliminary analysis of the possible burst
  21. Brightening of the Optical Counterpart of the Possible GRB 060218
  22. GRB 060218: MDM Observations
  23. GRB 060218: Pre-burst detection of a possible host galaxy
  24. GRB 060218A: ROTSE-III Possible Optical Flare
  25. GRB060218: Swift/XRT refined position of a possible burst
  26. Preliminary refined analysis of the Swift-BAT trigger 191157
  27. Further UVOT Observations of the Candidate Optical Afterglow for GRB 060218
  28. GRB 060211B: Swift/UVOT Upper Limits
  29. GRB 060218: Swift XRT Position
  30. GRB 060218: Swift-BAT detection of a possible burst
  31. GRB 060213: optical afterglow not confirmed
  32. Swift UVOT observations of GRB060213
  33. GRB 060213: optical afterglow candidate
  34. GRB060213: Swift XRT observations and possible afterglow candidate
  35. GRB 060211b: WIRO NIR Observations
  36. GRB060206: Swift XRT observations of an unbroken powerlaw decay
  37. GRB 060213: IPN localization
  38. GRB 060211a: WIRO NIR Observations
  39. GRB060211B: REM optical and NIR observations
  40. GRB 060211B: BAT detects no additional burst emission beyond T + 122 sec
  41. GRB 060211A: Further refined analysis of the Swift burst
  42. GRB060121: optical observations
  43. GRB060105: optical observations
  44. GRB 060210: ARC NIR Detection of Afterglow and Possible Host Galaxy
  45. GRB 060211b: P60 Observations
  46. GRB 060211A: Partial refined analysis on the Swift-BAT burst
  47. GRB 050826: Optical Afterglow and Host Galaxy
  48. GRB 060210: Further refined analysis of the Swift-BAT burst
  49. GRB 060211B: Swift/BAT refined analysis
  50. GRB060210: Swift/UVOT Upper Limits
  51. GRB 060211B: Swift-XRT Team refined analysis
  52. GRB060211b: optical observation
  53. GRB060211B: Swift/XRT position
  54. GRB 060210: Optical Observations
  55. GRB 060211A: Swift XRT Team Refined Analysis
  56. GRB 060211B: Swift-BAT detection of a burst
  57. GRB060211: Faulkes North observation
  58. GRB 060211: Swift detection of a long burst
  59. GRB 060210: Refined analysis of the Swift-BAT burst
  60. GRB060210: Swift XRT Refined Analysis
  61. GRB060210: Early Optical Observations
  62. GRB060210:Faulkes Telescope North Afterglow Confirmation
  63. GRB 060210: candidate afterglow
  64. GRB 060210: Swift detection of a burst
  65. GRB060210: Optical afterglow
  66. GRB 060206: Swift/UVOT Observations
  67. Swift-BAT trigger 180931 is not a GRB
  68. GRB060209: RTT150 optical observations
  69. GRB 060209 : TAROT optical observation
  70. GRB 060209(?): Swift-BAT detection of a possible burst
  71. GRB 060206: WSRT Radio Observations
  72. GRB 060203: Swift/UVOT upper limits
  73. GRB060204a: Swift XRT Source is not GRB Afterglow
  74. GRB 060204b: pseudo-z from spectral parameters of the prompt emission
  75. GRB 060204A: ROSAT Pointing
  76. GRB060204A: Swift/UVOT observations
  77. GRB 060206: Swift-BAT refined analysis
  78. GRB060206: Swift XRT Refined Analysis
  79. GRB060206: Swift XRT Position
  80. GRB060204a: Swift XRT Detection of an Afterglow Candidate
  81. GRB060206 - Swift UVOT Confirmation of Optical Afterglow
  82. GRB060206: Swift-BAT detection of a burst
  83. GRB 060204C: XRT analysis of Swift J061223.0+701243.9
  84. BAT GRB 060204C is probably not a GRB
  85. GRB 060204B: BVRi-band detections of optical afterglow
  86. GRB 060204A: Swift XRT upper limit
  87. GRB060204B: Swift/UVOT refined analysis
  88. GRB 060204C: optical observations
  89. Swift XRT Observation of GRB 060204C
  90. GRB 060204B: Swift-BAT refined analysis
  91. GRB060204B: Swift XRT Team Refined Analysis
  92. GRB 060204C: OSN limits
  93. GRB 060204C: Liverpool Telescopes optical limit
  94. GRB 060204C: ROTSE-III Optical Limits
  95. GRB 060204C: Swift-BAT detection of a burst
  96. GRB 060124: Radio Observations
  97. GRB060204B: Faulkes OT candidate
  98. GRB 060204B: ART optical limit
  99. GRB060204B, optical observation
  100. GRB060204B - SDSS pre-burst observations

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