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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"

28196 results found.

  1. GRB 060115: Swift detection of a burst
  2. GRB060114, optical observation
  3. GRB060114: Faulkes North observation
  4. GRB 060108: IR observations of afterglow
  5. GRB 060108: Evidence for an XRT Position Offset
  6. GRB 060110: KAIT observations
  7. GRB 060111B: Swift XRT refined analysis
  8. GRB 060111B: MITSuME detection of optical afterglow
  9. GRB 060111B: TAROT optical observation
  10. GRB060111A: RTT150 optical observations
  11. GRB060111B: RTT150, possible host galaxy
  12. GRB 060111B: Refined analysis of the Swift-BAT burst
  13. GRB 060111(a): P60 Observations
  14. GRB 060111B: Gualba observatory limit
  15. GRB 060111B: Swift detection of a burst
  16. GRB 060111: Swift-BAT Refined Analysis
  17. GRB060111.2:_MASTER optical limit
  18. GRB 060108: VLT K-band observations
  19. GRB 060111: TAROT optical observation
  20. GRB 060111: Swift detection of a burst
  21. GRB 060110: Mitsume optical observations
  22. GRB 060110: Swift-BAT refined analysis
  23. GRB 060109: Swift-BAT refined analysis
  24. GRB 060108: z-band imaging from Gemini-North
  25. GRB 060110a: RAPTOR detection of early optical emission.
  26. GRB 060110: UKIRT K-band observations
  27. GRB 060110: IR Candidate Afterglow
  28. GRB060110, optical observation
  29. GRB 060110: Correction
  30. Correction to GRB 060109 XRT analysis
  31. GRB 050110: IR Observations
  32. GRB 060109: Refined Swift-XRT analysis
  33. GRB 060109: Swift/UVOT upper limits
  34. GRB060109, optical observation
  35. GRB 060108: ISAS early observations and near IR upper limit
  36. GRB060108: P200 Ks Observations
  37. GRB 060108: early UKIRT K-band observations
  38. GRB 060108: a dark burst?
  39. GRB 060108: Refined XRT analysis
  40. GRB 060108: VLT J-band observations
  41. GRB 060108: Mitsume optical observations
  42. GRB 060108: Swift/UVOT upper limits
  43. GRB 060105: quick look analysis of the Suzaku/XIS afterglow observation
  44. GRB060108: SDSS pre-burst observations
  45. GRB060108: Faulkes Telescope observation
  46. GRB060108, optical observation
  47. GRB 060108: Refined analysis of the Swift-BAT burst
  48. GRB060108: Swift detection of its 100th GRB
  49. GRB 060105: ISAS observations and near IR upper limit
  50. GRB 060105: Swift/UVOT upper limits
  51. GRB 060105: Mitsume optical observations
  52. GRB 060105: BAT refined analysis
  53. GRB 060105: XRT refined analysis
  54. GRB060105: Suzaku-XIS and -HXD observation plan
  55. GRB060105, optical observation
  56. GRB060105: Swift detection of a bright long burst
  57. Swift-BAT trigger 175653 is probably not a GRB
  58. GRB 060102: Swift-BAT refined analysis
  59. GRB 060102: Swift-BAT detection of a burst
  60. GRB 051221B: Optical Observations with Kuiper 1.54m
  61. GRB 051227: Likely host galaxy underlying afterglow position
  62. GRB 051227: optical observation
  63. GRB 051227: optical afterglow
  64. GRB 051227: Magellan r'-band Imaging/Astrometry
  65. GRB 051227: refined analysis of VLT images
  66. GRB 051227: P60 Observations
  67. GRB 051227: MDM Observation
  68. GRB 051227: R-band object in the XRT error circle
  69. GRB 051227: XRT refined analysis
  70. GRB 051227: Further analysis of the Swift-BAT burst
  71. GRB 051227: Refined analysis of the Swift-BAT burst
  72. GRB051227: SDSS pre-burst observations
  73. GRB 051227, optical observation
  74. GRB051117B: optical observation
  75. Konus-Wind observation of GRB 051221A
  76. GRB051221A: Suzaku WAM observation of the prompt emission
  77. GRB 051221A: MDM Optical Observations
  78. GRB051016: analysis of the XMM-Newton observation
  79. GRB 051221A: Refined spectral and temporal analysis of the Swift-BAT short hard burst
  80. GRB 051221B: TAROT optical limits
  81. GRB 051221B: Refined analysis of the Swift-BAT burst
  82. GRB 051221B: BOOTES optical observations.
  83. Swift-BAT detection of a possible burst
  84. GRB 051221: Swift XRT refined analysis
  85. GRB 051221: Swift/UVOT upper limits
  86. GRB 051221: No variability in Gemini data
  87. GRB 051221: Improved astrometry of the IR counterpart
  88. GRB 051221: Refined analysis of the Swift-BAT short hard burst
  89. GRB 051221: Swift detection of a bright short burst
  90. Swift detection of an RS CVn flare star
  91. GRB051211A: possible optical candidate
  92. GRB 051215: near-infrared observations
  93. GRB051215 - SDSS pre-burst observations
  94. GRB 051215: Swift detection of a possible burst
  95. GRB051105: optical observations
  96. GRB 051213: Swift-BAT refined analysis
  97. GRB051211B: XRT refined analysis
  98. GRB 051211B, optical observation
  99. GRB 051211A: Swift/UVOT upper limits
  100. GRB 051211B: Swift/UVOT upper limits

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