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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"

27825 results found.

  1. Radio observation of GRB 080229b with ATCA
  2. GRB 081029: UVOT Detection of the Optical Afterglow
  3. GRB 081029: Redshift Confirmation from Gemini-South
  4. GRB 081029: Swift-BAT refined analysis
  5. GRB081029: Swift XRT refined analysis
  6. GRB 081029: Enhanced Swift-XRT position
  7. GRB 081028: GROND Confirmation of the Optical/NIR Afterglow
  8. GRB 081029: UVES/VLT Absorption Redshift
  9. GRB 081029: GROND Detection of the Optical/NIR Afterglow
  10. GRB 081029: ROTSE-III Detection of Optical Counterpart
  11. GRB 081029: Swift detection of a burst
  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: GROND Detection of the Optical/NIR Afterglow Candidate
  21. Fermi LAT/GBM short-hard GRB 081024B: Possible TLS Afterglow (Corrected)
  22. Fermi LAT/GBM short-hard GRB 081024B: Possible TLS Afterglow
  23. GRB 081028: Swift detection of a burst
  24. GRB 081024: No radio detection with the VLA
  25. GRB081025: RTT150 optical observations
  26. GRB 081024B: Swift-XRT further observations
  27. GRB 081025 BAT refined analysis
  28. Swift UVOT observations of GRB081025
  29. Swift UVOT observations of GRB081024B
  30. Konus-Wind observation of GRB 081025
  31. GRB 081025: Swift-XRT position
  32. GRB 081024B: Swift-XRT observations
  33. GRB 081025: Burst detection from Swift-BAT slew data
  34. GRB 081024B: Fermi Gamma-ray Burst Monitor detection
  35. Swift UVOT observations of GRB 081024
  36. GRB 081024: Swift-XRT refined analysis
  37. GRB 081024, Swift-BAT refined analysis
  38. GRB 081024: Enhanced Swift-XRT position
  39. GRB 081024: KAIT Optical Limits
  40. GRB 081024: Early Super-LOTIS Observations
  41. GRB 081024A: ROTSE-III Optical Limits
  42. GRB 081024: Swift detection of a burst
  43. GRB 081022, Swift-BAT refined analysis
  44. GRB 081016A: Swift-XRT refined analysis
  45. GRB 081022: Swift detection of a burst
  46. GRB 081012: Swift-XRT Refined Analysis
  47. Swift trigger 332287 is not a GRB
  48. Swift detection of a possible burst (trigger 332287)
  49. GRB 081012 - Enhanced Swift XRT position
  50. GRB 081017, Swift-BAT refined analysis
  51. GRB 081017: Swift detection of a burst
  52. GRB 081016B, Swift-BAT refined analysis
  53. GRB 081016B: Swift/UVOT Upper Limits
  54. GRB 081011: Swift XRT refined analysis
  55. GRB 081016B: Swift-XRT Team refined Analysis
  56. GRB 081016B: Enhanced Swift-XRT position
  57. GRB 081016B: ROTSE-III Optical Limits
  58. GRB 081016B: Swift detection of a burst
  59. GRB 081011: Enhanced Swift-XRT position
  60. GRB 081016: Swift-XRT candidate afterglow detection
  61. Swift detection of flare on CC Eri
  62. Trigger 331721 Due to Swift startracker loss-of-lock
  63. Detection of flare star Algol in Swift-BAT slew data
  64. GRB 081009: Fermi GBM detection
  65. Swift-BAT triggered on the flare star Algol
  66. GRB 081012: Fermi GBM detection
  67. GRB 081007 and GRB 081007B: Fermi GBM detection
  68. GRB 081012: Swift/UVOT analysis of initial observations
  69. GRB 081012: Swift/XRT detection
  70. GRB 081012, Swift-BAT refined analysis
  71. GRB 081012: ROTSE-III Optical Limits
  72. GRB 081012: Swift detection of a burst
  73. Revised table for GRB 081011 UVOT detections
  74. GRB081011: UVOT detection of an optical afterglow
  75. GRB 081011: Swift/XRT detection
  76. GRB 081011, Swift-BAT refined analysis
  77. GRB 081011: Swift detection of a burst
  78. GRB 081007: Radio Detection
  79. GRB 081008, Swift-BAT refined analysis
  80. GRB 081008: Swift-XRT Refined Analysis
  81. GRB081008: Swift/UVOT observations
  82. GRB 081008: Enhanced Swift-XRT position
  83. GRB 081008: VLT/FORS2 spectroscopy
  84. GRB 081008: Swift detection of a burst with optical afterglow
  85. GRB 081008: ROTSE-III Detection of Optical Counterpart
  86. GRB081006B: Fermi GBM detection
  87. GRB081006: Fermi GBM detection
  88. GRB081007: Swift/UVOT Observations
  89. GRB 081007, Swift-BAT refined analysis
  90. GRB 081007: Early RAPTOR measurements of optical counterpart
  91. GRB 081007: Swift-XRT Team refined analysis
  92. GRB 081007: Enhanced Swift-XRT position
  93. GRB 081007: Swift detection of a burst with optical afterglow
  94. GRB081003C: GLAST Burst Monitor detection
  95. Fermi GBM detection of additional bursts from AXP 1E1547.0-5408
  96. AXP 1E 1547.0-5408: Swift/UVOT Upper Limits
  97. GRB 081003B: Swift-XRT upper limit
  98. GRB 081003A: OSN optical observations
  99. AXP 1E1547.0-5408: Swift-XRT Team refined analysis
  100. GRB081003B: Optical limits from Spain

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