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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"

26119 results found.

  1. GRB 060124: Swift-BAT detection of a burst
  2. GRB 060116: Radio Detection
  3. GRB 060116: MARGE optical observations
  4. GRB 060121: Swift/UVOT upper limits
  5. GRB 060121: Liverpool Telescopes optical limits
  6. GRB 060121: Swift XRT refined analysis
  7. GRB 060121: I-band Limits
  8. GRB 060121: Confirmation of Afterglow
  9. GRB 060121: candidate optical counterpart
  10. GRB 060121: Swift XRT refined position
  11. GRB 060117: PROMPT Observations
  12. GRB060117 - ATCA 3/6cm radio limits
  13. GRB 060116: photometric redshift - the farthest GRB?
  14. GRB 060117: pseudo-z from spectral parameters of the prompt emission
  15. Konus-Wind observation of GRB 060117
  16. GRB 060116: possible I-J dropout
  17. GRB060108: photometric redshift determination
  18. GRB 060117: Refined analysis of the Swift-BAT burst
  19. GRB 060116: PROMPT Observations
  20. GRB 060117: FRAM refined analysis
  21. GRB 060117: FRAM optical afterglow candidate
  22. GRB 060117: Swift-BAT detection of a bright burst
  23. GRB 060116: VLT optical observations
  24. GRB 060116: Refined analysis of the Swift-BAT burst
  25. GRB 060115: PROMPT Observations
  26. GRB 060116: XRT refined analysis
  27. GRB 060116: IR Candidate Afterglow
  28. GRB 060116: Swift/UVOT upper limits
  29. GRB060115: REM observations
  30. GRB 060110: XRT position and analysis
  31. GRB 060116 : Lulin optical limit
  32. GRB 060116: ROTSE-III Optical Limits
  33. GRB060116: XRT position
  34. GRB060116: Faulkes North observation
  35. GRB 060116: Swift-BAT detection of a burst
  36. GRB 060115: Refined analysis of the Swift-BAT burst
  37. GRB 060115: OT photometry with MITSuME
  38. GRB 060115: Swift/UVOT upper limits
  39. GRB 060115: Swift XRT refined analysis
  40. GRB 060115: OT finding chart
  41. GRB 060114: Swift/UVOT Observations
  42. GRB 060115: MITSuME optical afterglow candidate
  43. GRB 060115: Swift detection of a burst
  44. GRB 060114: Swift XRT upper limit
  45. GRB060114: Faulkes North observation
  46. GRB 060108: IR observations of afterglow
  47. GRB060108: Faulkes North afterglow evidence
  48. GRB 060108: further analysis of VLT images
  49. GRB 060108: Evidence for an XRT Position Offset
  50. GRB 060110: KAIT observations
  51. GRB 060111B: Swift XRT refined analysis
  52. GRB 060111A: refined UVOT anaysis
  53. GRB 060111B: MITSuME detection of optical afterglow
  54. GRB 060111B: TAROT optical observation
  55. GRB060111A: RTT150 optical observations
  56. GRB060111B: RTT150, possible host galaxy
  57. GRB 060111B: Refined analysis of the Swift-BAT burst
  58. GRB 060110: MARGE observations
  59. GRB 060111(a): P60 Observations
  60. GRB 060111B: Gualba observatory limit
  61. GRB 060111B: ROTSE-III Detection of Optical Counterpart Flare
  62. GRB 060111B: Swift detection of a burst
  63. GRB 060111: Swift-BAT Refined Analysis
  64. GRB 060108: VLT K-band observations
  65. GRB 060111: TAROT optical observation
  66. GRB 060111: possible UVOT counterpart
  67. GRB060111 : XRT refined analysis
  68. GRB 060111: ROTSE-III Optical Limits
  69. GRB 060111: Swift detection of a burst
  70. GRB 060110: Swift-BAT refined analysis
  71. GRB 060109: Swift-BAT refined analysis
  72. GRB 060108: z-band imaging from Gemini-North
  73. GRB 060110a: RAPTOR detection of early optical emission.
  74. GRB 060110: IR Candidate Afterglow
  75. GRB 060110: Optical observation
  76. GRB 060110: Correction
  77. Correction to GRB 060109 XRT analysis
  78. GRB 060110: Optical limit
  79. GRB 060110: Swift-BAT detection of a burst
  80. GRB 060109: Refined Swift-XRT analysis
  81. GRB 060109: Swift/UVOT upper limits
  82. GRB 060108: ISAS early observations and near IR upper limit
  83. GRB060108: P200 Ks Observations
  84. GRB 060108: early UKIRT K-band observations
  85. Swift UVOT correction to GCN 4455
  86. GRB 060109: Swift Detection of a long burst
  87. GRB 060108: a dark burst?
  88. GRB 060108: Refined XRT analysis
  89. GRB 060108: VLT J-band observations
  90. GRB 060108: Mitsume optical observations
  91. GRB 060108: Swift/UVOT upper limits
  92. GRB 060105: quick look analysis of the Suzaku/XIS afterglow observation
  93. GRB060108: Faulkes Telescope observation
  94. GRB 060108: Refined analysis of the Swift-BAT burst
  95. GRB 060108: Swift XRT position
  96. GRB060108: Swift detection of its 100th GRB
  97. GRB 060105: Radio observations
  98. GRB 060105: MDM Observation
  99. Konus-Wind observation of GRB 060105
  100. GRB 060105: ISAS observations and near IR upper limit

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