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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"

27113 results found.

  1. GRB 070107, Swift-BAT refined analysis
  2. GRB 070107: Swift detection of a burst
  3. GRB070103: APO SPIcam i' and z' limits
  4. GRB 070103: Swift/UVOT Upper limits
  5. GRB070103: Swift XRT refined analysis
  6. GRB 070103, Swift-BAT refined analysis
  7. GRB 070103: TAROT Calern observatory optical observations
  8. GRB 070103: Swift detection of a burst
  9. Retractions of previous Swift-BAT triggers
  10. Konus-Wind observation of GRB 061222A
  11. GRB 061222B: TAROT La Silla observatory early optical observations
  12. GRB 061218: TAROT La Silla observatory early optical observations
  13. GRB 061222A: MITSuME Akeno optical upper limits
  14. GRB 061222B: MITSuME Akeno optical upper limits
  15. GRB 061222B, Swift-BAT refined analysis
  16. GRB061222A Swift/UVOT: Upper Limits
  17. GRB 061222B: Swift/UVOT Upper limits
  18. GRB061222B: Swift-XRT Refined Analysis
  19. GRB 061222B: BOOTES-IR optical observations
  20. GRB 061222B: SARA upper limit
  21. GRB 061222A, Swift-BAT refined analysis
  22. GRB 061222B: TAROT La Silla observatory afterglow observation
  23. GRB 061222B: TAROT La Silla observatory optical observations
  24. GRB 061222B: Swift detection of a burst
  25. GRB 061222A: Prompt ROTSE-III Optical Limits
  26. GRB 061222: Swift detection of a burst
  27. GRB 061218: TAROT La Silla observatory optical observations
  28. GRB 061217: TAROT Calern observatory optical observations
  29. GRB 061218: TORTOREM optical upper limits
  30. GRB 061218, Swift-BAT refined analysis
  31. GRB 061218: REM prompt observations
  32. Swift triggers (#251863) on a possible burst
  33. GRB061217: Swift/UVOT refined analysis.
  34. GRB061217 - Swift/XRT refined analysis
  35. GRB 061217, Further Swift-BAT refined analysis of the short hard burst
  36. GRB 061217, Swift-BAT refined analysis
  37. GRB 061217: REM prompt observations
  38. GRB 061217: ROTSE-III Optical Limits
  39. GRB 061217: Swift detection of a short hard burst
  40. GRB061210: Swift/UVOT observations
  41. Swift-BAT Trigger 250908 is a Cosmic Ray Shower event
  42. GRB 061210: Swift XRT analysis - Possible counterparts
  43. GRB 061210 : Faulkes North Telescope optical limit
  44. GRB 061214(?): ROTSE-III Optical Limits
  45. GRB 061214(?): Swift detection of a possible burst
  46. GRB 061210: Suzaku WAM observation of the prompt emission
  47. Swift/BAT trigger #250033 is due to a known source during loss of
  48. GRB 061213: MASTER-VWF-Kislovodsk optical candidate
  49. GRB 061213: MASTER-VWF-Kislovodsk observations
  50. GRB 061202: Suzaku WAM observation of the prompt emission
  51. GRB 061210, Swift-BAT refined analysis of the SHB
  52. GRB 061210: Swift-BAT detection of a short burst
  53. Optical Afterglow observations of GRB 061126
  54. GRB061126: update on the Swift-XRT afterglow light curve
  55. GRB 061201: UVOT Observations of a Fading Optical Afterglow
  56. GRB 061202: TORTOREM optical upper limits
  57. GRB061126 : NMSU 1.0m observations
  58. GRB061202: FRAM early follow-up limit
  59. GRB061202 optical limit by "Pi of the Sky"
  60. Konus-Wind observation of GRB 061201
  61. GRB061202: optical/NIR observations with REM
  62. GRB061202: Swift/UVOT Upper Limits
  63. GRB 061202, Swift-BAT refined analysis
  64. GRB 061202: Swift detection of a burst
  65. GRB 061201: Swift XRT Team refined analysis
  66. GRB 061201: Initial UVOT Observations
  67. GRB 061201, Swift-BAT refined analysis of the SHB
  68. GRB 061201: Swift detection of a short hard burst
  69. GRB 061201: Coincidence with a Galaxy Cluster
  70. GRB 061122: GETS observation
  71. GRB 061126: RAPTOR Optical Detection During Gamma-Ray Emission
  72. GRB 061126: Early Super-LOTIS Observations
  73. GRB 061126: optical observation
  74. GRB061126: Optical afterglow observations from MIRO
  75. GRB061126: Optical afterglow observations from MIRO
  76. GRB 061126 : SDSS Pre-Burst Observations
  77. GRB 061126: Swift-XRT refined analysis
  78. GRB 061126: Swift/UVOT Observations
  79. GRB 061126, Swift-BAT refined analysis
  80. GRB 061126: SARA Observations
  81. GRB 061126: Early Detection of the IR Afterglow
  82. GRB 061126: Faulkes Telescope North Optical Observations
  83. GRB 061126: Swift/UVOT Afterglow Detection
  84. GRB 061126: XRT position
  85. GRB 061126: Swift detection of a burst
  86. GRB 061121: Ep,i - Eiso correlation
  87. GRB061122: Swift/UVOT Optical Observations
  88. GRB 061121: ART detection in Ic
  89. GRB061122: Swift-XRT position
  90. Konus-Wind and Konus-A observations of GRB 061121
  91. Swift-BAT trigger 239987 is not a GRB
  92. GRB 061121: Swift/UVOT Observations
  93. GRB 061121: Swift-XRT Team Refined Analysis
  94. GRB 061121, Swift-BAT refined analysis
  95. GRB061121, optical observation
  96. GRB 061121: Faulkes Telescope North Optical Observation
  97. GRB 061121: ROTSE-III Confirmation of Optical Counterpart
  98. GRB 061121: Swift detection of a bright burst with an optical counterpart
  99. GRB 060111B: Swift UVOT Refined Magnitudes
  100. GRB 061110B: NIR Observations

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