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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"

28232 results found.

  1. GRB 060111B: Suzaku WAM observation of the prompt emission
  2. GRB 060124: Swift-BAT detection of a burst
  3. GRB 060121: Liverpool Telescopes optical limits
  4. GRB 060121: Swift XRT refined analysis
  5. Konus-Wind observation of GRB 060121
  6. GRB 060121: candidate optical counterpart
  7. GRB 060121: Infrared Observations
  8. GRB 060121: optical observations
  9. GRB 060121: Optical imaging
  10. GRB060121 - SDSS pre-burst observations
  11. HETE Alert 4006: MASTER promt optical limit
  12. GRB060117 - ATCA 3/6cm radio limits - correction
  13. GRB060117 - ATCA 3/6cm radio limits
  14. GRB 060116: photometric redshift - the farthest GRB?
  15. Konus-Wind observation of GRB 060117
  16. GRB 060116: UKIRT IR Observations
  17. GRB 060117: Refined analysis of the Swift-BAT burst
  18. GRB 060117: FRAM optical afterglow candidate
  19. GRB 060117: nearby galaxy
  20. GRB 060116: VLT optical observations
  21. GRB 060116: Refined analysis of the Swift-BAT burst
  22. GRB 060116: XRT refined analysis
  23. GRB 060116: IR Candidate Afterglow
  24. GRB 060116: Swift/UVOT upper limits
  25. GRB060115: REM observations
  26. GRB 060110: XRT position and analysis
  27. GRB 060116 : Lulin optical limit
  28. GRB060116: Faulkes North observation
  29. GRB 060116: Swift-BAT detection of a burst
  30. GRB 060115: Refined analysis of the Swift-BAT burst
  31. GRB 060115: Swift/UVOT upper limits
  32. GRB 060114: REM observations
  33. GRB 060115: Swift XRT refined analysis
  34. GRB 060114: Swift/UVOT Observations
  35. GRB060115, optical observation
  36. GRB 060115: MITSuME optical afterglow candidate
  37. GRB 060115: Swift detection of a burst
  38. GRB060114, optical observation
  39. GRB060114: Faulkes North observation
  40. GRB 060108: IR observations of afterglow
  41. GRB 060108: Evidence for an XRT Position Offset
  42. GRB 060110: KAIT observations
  43. GRB 060111B: Swift XRT refined analysis
  44. GRB 060111B: MITSuME detection of optical afterglow
  45. GRB 060111B: TAROT optical observation
  46. GRB060111A: RTT150 optical observations
  47. GRB060111B: RTT150, possible host galaxy
  48. GRB 060111B: Refined analysis of the Swift-BAT burst
  49. GRB 060111(a): P60 Observations
  50. GRB 060111B: Gualba observatory limit
  51. GRB 060111B: Swift detection of a burst
  52. GRB 060111: Swift-BAT Refined Analysis
  53. GRB060111.2:_MASTER optical limit
  54. GRB 060108: VLT K-band observations
  55. GRB 060111: TAROT optical observation
  56. GRB 060111: Swift detection of a burst
  57. GRB 060110: Mitsume optical observations
  58. GRB 060110: Swift-BAT refined analysis
  59. GRB 060109: Swift-BAT refined analysis
  60. GRB 060108: z-band imaging from Gemini-North
  61. GRB 060110a: RAPTOR detection of early optical emission.
  62. GRB 060110: UKIRT K-band observations
  63. GRB 060110: IR Candidate Afterglow
  64. GRB060110, optical observation
  65. GRB 060110: Correction
  66. Correction to GRB 060109 XRT analysis
  67. GRB 050110: IR Observations
  68. GRB 060109: Refined Swift-XRT analysis
  69. GRB 060109: Swift/UVOT upper limits
  70. GRB060109, optical observation
  71. GRB 060108: ISAS early observations and near IR upper limit
  72. GRB060108: P200 Ks Observations
  73. GRB 060108: early UKIRT K-band observations
  74. GRB 060108: a dark burst?
  75. GRB 060108: Refined XRT analysis
  76. GRB 060108: VLT J-band observations
  77. GRB 060108: Mitsume optical observations
  78. GRB 060108: Swift/UVOT upper limits
  79. GRB 060105: quick look analysis of the Suzaku/XIS afterglow observation
  80. GRB060108: SDSS pre-burst observations
  81. GRB060108: Faulkes Telescope observation
  82. GRB060108, optical observation
  83. GRB 060108: Refined analysis of the Swift-BAT burst
  84. GRB060108: Swift detection of its 100th GRB
  85. GRB 060105: ISAS observations and near IR upper limit
  86. GRB 060105: Swift/UVOT upper limits
  87. GRB 060105: Mitsume optical observations
  88. GRB 060105: BAT refined analysis
  89. GRB 060105: XRT refined analysis
  90. GRB060105: Suzaku-XIS and -HXD observation plan
  91. GRB060105, optical observation
  92. GRB060105: Swift detection of a bright long burst
  93. Swift-BAT trigger 175653 is probably not a GRB
  94. GRB 060102: Swift-BAT refined analysis
  95. GRB 060102: Swift-BAT detection of a burst
  96. GRB 051221B: Optical Observations with Kuiper 1.54m
  97. GRB 051227: Likely host galaxy underlying afterglow position
  98. GRB 051227: optical observation
  99. GRB 051227: optical afterglow
  100. GRB 051227: Magellan r'-band Imaging/Astrometry

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