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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"

38154 results found.

  1. GRB 081024B: Suzaku WAM observation of the prompt emission
  2. GRB 081029: Enhanced Swift-XRT position
  3. GRB 081028: GROND Confirmation of the Optical/NIR Afterglow
  4. GRB 081029: REM observations
  5. Radio observation of GRB 080303 with ATCA
  6. Radio observation of GRB 080411 with ATCA
  7. GRB 081029: UVES/VLT Absorption Redshift
  8. GRB 081029: GROND Detection of the Optical/NIR Afterglow
  9. GRB 081029: ROTSE-III Detection of Optical Counterpart
  10. GRB 081029: Swift detection of a burst
  11. GRB 081028: Magellan redshift
  12. GRB 081028B: Fermi GBM detection
  13. GRB 081021: Fermi GBM detection
  14. GRB081028: UVOT detection of a brightening afterglow
  15. Swift UVOT observations of GRB081028
  16. GRB 081028: Swift-XRT refined analysis
  17. GRB 081028, Swift-BAT refined analysis
  18. GRB 081028: Enhanced Swift-XRT position
  19. GRB 081028: TAROT Calern observatory optical observations
  20. GRB 081028: optical observations at the NOT
  21. GRB 081028: GROND Detection of the Optical/NIR Afterglow Candidate
  22. Fermi LAT/GBM short-hard GRB 081024B: Possible TLS Afterglow (Corrected)
  23. Fermi LAT/GBM short-hard GRB 081024B: Possible TLS Afterglow
  24. GRB 081028: Swift detection of a burst
  25. GRB 081025: TLS upper limits
  26. GRB 081024: No radio detection with the VLA
  27. GRB081025: RTT150 optical observations
  28. GRB 081024B: Swift-XRT further observations
  29. GRB 081025 BAT refined analysis
  30. Swift UVOT observations of GRB081025
  31. Swift UVOT observations of GRB081024B
  32. Konus-Wind observation of GRB 081025
  33. GRB 081025: Swift-XRT position
  34. GRB 081024B: Swift-XRT observations
  35. GRB 081025: Burst detection from Swift-BAT slew data
  36. GRB 081024B: Fermi Gamma-ray Burst Monitor detection
  37. Fermi-LAT observation of GRB 081024B
  38. Swift UVOT observations of GRB 081024
  39. GRB 081024: Swift-XRT refined analysis
  40. GRB 081024, Swift-BAT refined analysis
  41. GRB 081024: Enhanced Swift-XRT position
  42. GRB 081024: Faulkes Telescope North optical observations
  43. GRB 081024: KAIT Optical Limits
  44. GRB 081024: Early Super-LOTIS Observations
  45. GRB 081024A: ROTSE-III Optical Limits
  46. GRB 081024: Swift detection of a burst
  47. GRB 081022, Swift-BAT refined analysis
  48. GRB 081016A: Swift-XRT refined analysis
  49. GRB 081022: Swift detection of a burst
  50. GRB 081012: Swift-XRT Refined Analysis
  51. Swift trigger 332287 is not a GRB
  52. GRB 081012 - Enhanced Swift XRT position
  53. GRB 081017, Swift-BAT refined analysis
  54. GRB 081017: REM early observations
  55. GRB 081017: Swift detection of a burst
  56. GRB 081016B, Swift-BAT refined analysis
  57. GRB 081016B: Swift/UVOT Upper Limits
  58. GRB 081011: Swift XRT refined analysis
  59. GRB 081016B: Swift-XRT Team refined Analysis
  60. GRB 081016B: Enhanced Swift-XRT position
  61. GRB 081016B: ROTSE-III Optical Limits
  62. GRB 081016B: Swift detection of a burst
  63. GRB 081011: Enhanced Swift-XRT position
  64. GRB 081016: Swift-XRT candidate afterglow detection
  65. GRB 081016: A long GRB discovered by INTEGRAL
  66. Trigger 331721 Due to Swift startracker loss-of-lock
  67. GRB 081009: Fermi GBM detection
  68. GRB 081012: GROND upper limits
  69. GRB 081008: Galaxy associated with z=1.967 absorber
  70. GRB 081012: Fermi GBM detection
  71. GRB 081007 and GRB 081007B: Fermi GBM detection
  72. GRB 080430: optical observations
  73. GRB 081008 optical upper limit
  74. GRB 081012: Observations from NOT
  75. GRB 081012: Swift/UVOT analysis of initial observations
  76. GRB 081012: Swift/XRT detection
  77. GRB 081012, Swift-BAT refined analysis
  78. GRB 081012: ROTSE-III Optical Limits
  79. GRB 081012: Swift detection of a burst
  80. Revised table for GRB 081011 UVOT detections
  81. GRB081011: UVOT detection of an optical afterglow
  82. GRB 081011: Swift/XRT detection
  83. GRB 081011, Swift-BAT refined analysis
  84. GRB 081008, SMARTS optical/IR afterglow observations
  85. GRB 081011: Swift detection of a burst
  86. GRB 081007: Radio Detection
  87. Konus-Wind observation of GRB 081001
  88. GRB 081007: Rapid PROMPT Detections
  89. GRB 081008, Swift-BAT refined analysis
  90. GRB 081008: VLT redshift confirmation
  91. GRB 081008: Swift-XRT Refined Analysis
  92. GRB081008: Swift/UVOT observations
  93. GRB 081008: Enhanced Swift-XRT position
  94. GRB 081008: Gemini-South Absorption Redshiftt
  95. GRB 081008: VLT/FORS2 spectroscopy
  96. GRB 081008: Swift detection of a burst with optical afterglow
  97. GRB 081008: ROTSE-III Detection of Optical Counterpart
  98. GRB081006B: Fermi GBM detection
  99. GRB081006: Fermi GBM detection
  100. GRB081007: Swift/UVOT Observations

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