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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"

11789 results found.

  1. Konus-Wind observation of GRB 081203B
  2. GRB081203A: Swift-XRT refined analysis
  3. GRB 081128: optical observation
  4. GRB 081126: Fermi GBM detection
  5. Fermi Gamma-ray Burst Monitor trigger 249166723 reclassification
  6. GRB 081128A: optical observations
  7. SGR 1806-20: Fermi GBM detection.
  8. GRB 081128: Swift detection of a burst
  9. Konus-Wind observation of GRB 081126
  10. GRB 081127: Swift detection of a burst
  11. GRB 081126: optical observations
  12. GRB 081120: Fermi GBM detection
  13. GRB 081118: Fermi GBM detection.
  14. Konus-Wind observation of GRB 081121
  15. GRB081121: Fermi GBM detection
  16. GRB 081121: Swift-XRT refined analysis
  17. GRB 081121: Swift detection of a burst
  18. GRB 081121: ROTSE-III Detection of Optical Counterpart
  19. GRB 081118: GROND detection of afterglow
  20. GRB 081118: Swift detection of a burst
  21. GRB 081113: Fermi GBM detection
  22. GRB 081110: Fermi GBM detection
  23. GRB 081109A: Swift-XRT refined analysis
  24. GRB 081109: Swift detection of a burst
  25. GRB 081024C: Fermi Gamma-ray Burst Monitor detection
  26. SGR 1806-20: Fermi GBM detection
  27. GRB 081105B: Fermi GBM detection
  28. GRB 081104: GROND Detection of the Optical/NIR Afterglow Candidate?
  29. Fermi-GBM detection of a Solar Flare
  30. GRB 081102: Swift-BAT refined analysis
  31. GRB 081024B: BTA deep optical observations
  32. GRB 081028B: Fermi GBM detection
  33. GRB 081028, Swift-BAT refined analysis
  34. GRB 081028: Swift detection of a burst
  35. Konus-Wind observation of GRB 081025
  36. Fermi-LAT observation of GRB 081024B
  37. GRB 081024: KAIT Optical Limits
  38. GRB 081024A: ROTSE-III Optical Limits
  39. GRB 081024: Swift detection of a burst
  40. Swift detection of a possible burst (trigger 332287)
  41. GRB 081016B: Swift-XRT Team refined Analysis
  42. GRB 081016B: ROTSE-III Optical Limits
  43. GRB 081016B: Swift detection of a burst
  44. GRB 081016: Swift-XRT candidate afterglow detection
  45. GRB 081016: A long GRB discovered by INTEGRAL
  46. Detection of flare star Algol in Swift-BAT slew data
  47. GRB 081009: Fermi GBM detection
  48. GRB 081012: GROND upper limits
  49. GRB 081012, Swift-BAT refined analysis
  50. GRB 081012: ROTSE-III Optical Limits
  51. GRB 081012: Swift detection of a burst
  52. Konus-Wind observation of GRB 081001
  53. GRB 081008: Gemini-South Absorption Redshiftt
  54. GRB 081008: VLT/FORS2 spectroscopy
  55. GRB081006B: Fermi GBM detection
  56. GRB 081007: Swift detection of a burst with optical afterglow
  57. Fermi GBM detection of additional bursts from AXP 1E1547.0-5408
  58. GRB081003B: Optical limits from Spain
  59. GRB 081003A: Swift-XRT Team position and analysis
  60. GRB 081003B: a long GRB detected with INTEGRAL
  61. GRB 080928: Fermi GBM detection
  62. GRB 081003: A long GRB discovered by INTEGRAL
  63. GRB081001: SuperAGILE Localization of a long GRB
  64. GRB 080928: VLT redshift
  65. GRB 080928: Swift/UVOT observations
  66. GRB 080928A: ROTSE-III Confirmation of Optical Counterpart
  67. GRB 080928: Swift detection of a burst with an optical counterpart
  68. GRB 080920: Fermi GBM detection
  69. GRB080922, optical upper limit
  70. Swift detection of a possible GRB (trigger 325707)
  71. GRB080916A: Suzaku WAM observation of the prompt emission
  72. GRB 080922: Swift/UVOT Upper Limits
  73. GRB080922: A long GRB detected by INTEGRAL
  74. Konus-Wind observation of GRB 080916A
  75. Konus-Wind observation of GRB 080916C
  76. GRB 080913: Konus-Wind and Swift/BAT joint spectral analysis
  77. GRB 080916B: Swift-XRT afterglow detection
  78. GRB 080916: REM candidate afterglow
  79. GRB 080916: Swift detection of a burst with optical afterglow
  80. GRB 080915: Swift-XRT afterglow detection and analysis
  81. GRB 080915: ROTSE-III Optical Limits
  82. GRB 080915: Swift detection of a burst
  83. GRB 080913: Swift-XRT refined analysis
  84. GRB 080913: Swift detection of a burst
  85. GRB 080905B: Watcher optical detection
  86. GRB 080905B: Fermi Gamma-ray Burst Monitor detection
  87. GRB 080906: Swift-XRT Refined Analysis
  88. GRB 080906: GROND observations of the optical/NIR afterglow
  89. GRB 080905B: Refined UVOT Analysis
  90. GRB 080905B: VLT redshift
  91. GRB 080905B: Swift detection of a burst with possible optical counterpart
  92. GRB 080905: Swift detection of a probably-short burst
  93. GRB 080903: ROTSE-III Optical Limits
  94. Recent VLA non-detection of SGR 0501+4516
  95. GRB 080830: Fermi Gamma-ray Burst Monitor detection
  96. INTEGRAL ToO observation of SGR0501+4516
  97. SGR 0501+4516: XMM-Newton monitoring schedule
  98. GRB 080828: SuperAGILE GRB Localization
  99. SGR 0501+4516: Decline in Activity
  100. GRB080823: Fermi Gamma-ray Burst Monitor detection

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