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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"

28102 results found.

  1. GRB 060115: Swift/UVOT upper limits
  2. GRB 060114: REM observations
  3. GRB 060115: Swift XRT refined analysis
  4. GRB 060114: Swift/UVOT Observations
  5. GRB060115, optical observation
  6. GRB 060115: MITSuME optical afterglow candidate
  7. GRB 060115: Swift detection of a burst
  8. GRB060114, optical observation
  9. GRB060114: Faulkes North observation
  10. GRB 060108: IR observations of afterglow
  11. GRB 060108: Evidence for an XRT Position Offset
  12. GRB 060110: KAIT observations
  13. GRB 060111B: Swift XRT refined analysis
  14. GRB 060111B: MITSuME detection of optical afterglow
  15. GRB 060111B: TAROT optical observation
  16. GRB060111A: RTT150 optical observations
  17. GRB060111B: RTT150, possible host galaxy
  18. GRB 060111B: Refined analysis of the Swift-BAT burst
  19. GRB 060111(a): P60 Observations
  20. GRB 060111B: Gualba observatory limit
  21. GRB 060111B: Swift detection of a burst
  22. GRB 060111: Swift-BAT Refined Analysis
  23. GRB060111.2:_MASTER optical limit
  24. GRB 060108: VLT K-band observations
  25. GRB 060111: TAROT optical observation
  26. GRB 060111: Swift detection of a burst
  27. GRB 060110: Mitsume optical observations
  28. GRB 060110: Swift-BAT refined analysis
  29. GRB 060109: Swift-BAT refined analysis
  30. GRB 060108: z-band imaging from Gemini-North
  31. GRB 060110a: RAPTOR detection of early optical emission.
  32. GRB 060110: UKIRT K-band observations
  33. GRB 060110: IR Candidate Afterglow
  34. GRB060110, optical observation
  35. GRB 060110: Correction
  36. Correction to GRB 060109 XRT analysis
  37. GRB 050110: IR Observations
  38. GRB 060109: Refined Swift-XRT analysis
  39. GRB 060109: Swift/UVOT upper limits
  40. GRB060109, optical observation
  41. GRB 060108: ISAS early observations and near IR upper limit
  42. GRB060108: P200 Ks Observations
  43. GRB 060108: early UKIRT K-band observations
  44. GRB 060108: a dark burst?
  45. GRB 060108: Refined XRT analysis
  46. GRB 060108: VLT J-band observations
  47. GRB 060108: Mitsume optical observations
  48. GRB 060108: Swift/UVOT upper limits
  49. GRB 060105: quick look analysis of the Suzaku/XIS afterglow observation
  50. GRB060108: SDSS pre-burst observations
  51. GRB060108: Faulkes Telescope observation
  52. GRB060108, optical observation
  53. GRB 060108: Refined analysis of the Swift-BAT burst
  54. GRB060108: Swift detection of its 100th GRB
  55. GRB 060105: ISAS observations and near IR upper limit
  56. GRB 060105: Swift/UVOT upper limits
  57. GRB 060105: Mitsume optical observations
  58. GRB 060105: BAT refined analysis
  59. GRB 060105: XRT refined analysis
  60. GRB060105: Suzaku-XIS and -HXD observation plan
  61. GRB060105, optical observation
  62. GRB060105: Swift detection of a bright long burst
  63. Swift-BAT trigger 175653 is probably not a GRB
  64. GRB 060102: Swift-BAT refined analysis
  65. GRB 060102: Swift-BAT detection of a burst
  66. GRB 051221B: Optical Observations with Kuiper 1.54m
  67. GRB 051227: Likely host galaxy underlying afterglow position
  68. GRB 051227: optical observation
  69. GRB 051227: optical afterglow
  70. GRB 051227: Magellan r'-band Imaging/Astrometry
  71. GRB 051227: refined analysis of VLT images
  72. GRB 051227: P60 Observations
  73. GRB 051227: MDM Observation
  74. GRB 051227: R-band object in the XRT error circle
  75. GRB 051227: XRT refined analysis
  76. GRB 051227: Further analysis of the Swift-BAT burst
  77. GRB 051227: Refined analysis of the Swift-BAT burst
  78. GRB051227: SDSS pre-burst observations
  79. GRB 051227, optical observation
  80. GRB051117B: optical observation
  81. Konus-Wind observation of GRB 051221A
  82. GRB051221A: Suzaku WAM observation of the prompt emission
  83. GRB 051221A: MDM Optical Observations
  84. GRB051016: analysis of the XMM-Newton observation
  85. GRB 051221A: Refined spectral and temporal analysis of the Swift-BAT short hard burst
  86. GRB 051221B: TAROT optical limits
  87. GRB 051221B: Refined analysis of the Swift-BAT burst
  88. GRB 051221B: BOOTES optical observations.
  89. Swift-BAT detection of a possible burst
  90. GRB 051221: Swift XRT refined analysis
  91. GRB 051221: Swift/UVOT upper limits
  92. GRB 051221: No variability in Gemini data
  93. GRB 051221: Improved astrometry of the IR counterpart
  94. GRB 051221: Refined analysis of the Swift-BAT short hard burst
  95. GRB 051221: Swift detection of a bright short burst
  96. Swift detection of an RS CVn flare star
  97. GRB051211A: possible optical candidate
  98. GRB 051215: near-infrared observations
  99. GRB051215 - SDSS pre-burst observations
  100. GRB 051215: Swift detection of a possible burst

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