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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"

28108 results found.

  1. GRB060115: REM observations
  2. GRB 060110: XRT position and analysis
  3. GRB 060116 : Lulin optical limit
  4. GRB060116: Faulkes North observation
  5. GRB 060116: Swift-BAT detection of a burst
  6. GRB 060115: Refined analysis of the Swift-BAT burst
  7. GRB 060115: Swift/UVOT upper limits
  8. GRB 060114: REM observations
  9. GRB 060115: Swift XRT refined analysis
  10. GRB 060114: Swift/UVOT Observations
  11. GRB060115, optical observation
  12. GRB 060115: MITSuME optical afterglow candidate
  13. GRB 060115: Swift detection of a burst
  14. GRB060114, optical observation
  15. GRB060114: Faulkes North observation
  16. GRB 060108: IR observations of afterglow
  17. GRB 060108: Evidence for an XRT Position Offset
  18. GRB 060110: KAIT observations
  19. GRB 060111B: Swift XRT refined analysis
  20. GRB 060111B: MITSuME detection of optical afterglow
  21. GRB 060111B: TAROT optical observation
  22. GRB060111A: RTT150 optical observations
  23. GRB060111B: RTT150, possible host galaxy
  24. GRB 060111B: Refined analysis of the Swift-BAT burst
  25. GRB 060111(a): P60 Observations
  26. GRB 060111B: Gualba observatory limit
  27. GRB 060111B: Swift detection of a burst
  28. GRB 060111: Swift-BAT Refined Analysis
  29. GRB060111.2:_MASTER optical limit
  30. GRB 060108: VLT K-band observations
  31. GRB 060111: TAROT optical observation
  32. GRB 060111: Swift detection of a burst
  33. GRB 060110: Mitsume optical observations
  34. GRB 060110: Swift-BAT refined analysis
  35. GRB 060109: Swift-BAT refined analysis
  36. GRB 060108: z-band imaging from Gemini-North
  37. GRB 060110a: RAPTOR detection of early optical emission.
  38. GRB 060110: UKIRT K-band observations
  39. GRB 060110: IR Candidate Afterglow
  40. GRB060110, optical observation
  41. GRB 060110: Correction
  42. Correction to GRB 060109 XRT analysis
  43. GRB 050110: IR Observations
  44. GRB 060109: Refined Swift-XRT analysis
  45. GRB 060109: Swift/UVOT upper limits
  46. GRB060109, optical observation
  47. GRB 060108: ISAS early observations and near IR upper limit
  48. GRB060108: P200 Ks Observations
  49. GRB 060108: early UKIRT K-band observations
  50. GRB 060108: a dark burst?
  51. GRB 060108: Refined XRT analysis
  52. GRB 060108: VLT J-band observations
  53. GRB 060108: Mitsume optical observations
  54. GRB 060108: Swift/UVOT upper limits
  55. GRB 060105: quick look analysis of the Suzaku/XIS afterglow observation
  56. GRB060108: SDSS pre-burst observations
  57. GRB060108: Faulkes Telescope observation
  58. GRB060108, optical observation
  59. GRB 060108: Refined analysis of the Swift-BAT burst
  60. GRB060108: Swift detection of its 100th GRB
  61. GRB 060105: ISAS observations and near IR upper limit
  62. GRB 060105: Swift/UVOT upper limits
  63. GRB 060105: Mitsume optical observations
  64. GRB 060105: BAT refined analysis
  65. GRB 060105: XRT refined analysis
  66. GRB060105: Suzaku-XIS and -HXD observation plan
  67. GRB060105, optical observation
  68. GRB060105: Swift detection of a bright long burst
  69. Swift-BAT trigger 175653 is probably not a GRB
  70. GRB 060102: Swift-BAT refined analysis
  71. GRB 060102: Swift-BAT detection of a burst
  72. GRB 051221B: Optical Observations with Kuiper 1.54m
  73. GRB 051227: Likely host galaxy underlying afterglow position
  74. GRB 051227: optical observation
  75. GRB 051227: optical afterglow
  76. GRB 051227: Magellan r'-band Imaging/Astrometry
  77. GRB 051227: refined analysis of VLT images
  78. GRB 051227: P60 Observations
  79. GRB 051227: MDM Observation
  80. GRB 051227: R-band object in the XRT error circle
  81. GRB 051227: XRT refined analysis
  82. GRB 051227: Further analysis of the Swift-BAT burst
  83. GRB 051227: Refined analysis of the Swift-BAT burst
  84. GRB051227: SDSS pre-burst observations
  85. GRB 051227, optical observation
  86. GRB051117B: optical observation
  87. Konus-Wind observation of GRB 051221A
  88. GRB051221A: Suzaku WAM observation of the prompt emission
  89. GRB 051221A: MDM Optical Observations
  90. GRB051016: analysis of the XMM-Newton observation
  91. GRB 051221A: Refined spectral and temporal analysis of the Swift-BAT short hard burst
  92. GRB 051221B: TAROT optical limits
  93. GRB 051221B: Refined analysis of the Swift-BAT burst
  94. GRB 051221B: BOOTES optical observations.
  95. Swift-BAT detection of a possible burst
  96. GRB 051221: Swift XRT refined analysis
  97. GRB 051221: Swift/UVOT upper limits
  98. GRB 051221: No variability in Gemini data
  99. GRB 051221: Improved astrometry of the IR counterpart
  100. GRB 051221: Refined analysis of the Swift-BAT short hard burst

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