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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"

32563 results found.

  1. GRB 081109A: Swift-XRT refined analysis
  2. GRB 081109: Fermi GBM detection
  3. GRB 081109: Swift/UVOT upper limits
  4. GRB 081109A optical upper limit
  5. GRB 081109: REM NIR afterglow detection
  6. GRB 081028 - PAIRITEL NIR detection
  7. GRB 081104: GROND found no Optical/NIR Afterglow
  8. GRB 081105: GROND Upper Limits
  9. Radio observation of GRB 080523 with ATCA
  10. Radio observation of GRB 080520 with ATCA
  11. UVOT/Swift observations of GRB081105
  12. Swift-XRT observations of GRB 081105
  13. Radio observation of GRB 080516 with ATCA
  14. GRB 081025: Fermi GBM observation
  15. GRB 081104: GROND Detection of the Optical/NIR Afterglow Candidate?
  16. GRB 081104: refined XRT analysis
  17. GRB 081104: Swift-BAT refined analysis
  18. GRB081104: Swift/UVOT Upper Limits
  19. Fermi-GBM detection of a Solar Flare
  20. Fermi Detection of GRB 081102
  21. GRB 081104 : Faulkes Telescope South observations
  22. GRB 081104: Swift-XRT position
  23. Radio observation of GRB 080130 with ATCA
  24. GRB 081102: MASTER prompt optical limit
  25. GRB 081102: Swift-XRT refined analysis
  26. GRB 081102: Swift/UVOT refined analysis
  27. GRB 081102: Swift-BAT refined analysis
  28. Radio observation of GRB 080218b with ATCA
  29. Radio observation of GRB 080229a with ATCA
  30. GRB 081102: MASTER VWF promt observation
  31. GRB 081102: OPTIMA-Burst optical upper limit
  32. SGR 0501+4516: optical observations in August
  33. GRB 081101 (or SGR 0623-0006 ): Fermi GBM detection
  34. SGR 0623-0006 or GRB 081101: Swift-XRT refined analysis
  35. SGR 0623-0006 or GRB 081101: Swift-BAT/-XRT refined analysis
  36. GRB 081024B: BTA deep optical observations
  37. GRB 081028: CrAO optical observations
  38. GRB 081024B: new Swift-XRT observations
  39. Radio observation of GRB 080229b with ATCA
  40. GRB 081029, SMARTS optical/IR afterglow observations
  41. GRB 081024B: VLA radio observation
  42. GRB 081029: PROMPT Detections
  43. GRB 081029: Redshift Confirmation from Gemini-South
  44. GRB 081029: Swift-BAT refined analysis
  45. GRB081029: Swift XRT refined analysis
  46. GRB 081025: Suzaku WAM observation of the prompt emission
  47. GRB 081024B: Suzaku WAM observation of the prompt emission
  48. GRB 081028: GROND Confirmation of the Optical/NIR Afterglow
  49. GRB 081029: REM observations
  50. Radio observation of GRB 080303 with ATCA
  51. Radio observation of GRB 080411 with ATCA
  52. GRB 081029: UVES/VLT Absorption Redshift
  53. GRB 081029: GROND Detection of the Optical/NIR Afterglow
  54. GRB 081029: ROTSE-III Detection of Optical Counterpart
  55. GRB 081028: Magellan redshift
  56. GRB081028: UVOT detection of a brightening afterglow
  57. Swift UVOT observations of GRB081028
  58. GRB 081028: Swift-XRT refined analysis
  59. GRB 081028, Swift-BAT refined analysis
  60. GRB 081028: TAROT Calern observatory optical observations
  61. GRB 081028: optical observations at the NOT
  62. GRB 081028: GROND Detection of the Optical/NIR Afterglow Candidate
  63. Fermi LAT/GBM short-hard GRB 081024B: Possible TLS Afterglow (Corrected)
  64. Fermi LAT/GBM short-hard GRB 081024B: Possible TLS Afterglow
  65. GRB 081025: TLS upper limits
  66. GRB 081024: No radio detection with the VLA
  67. GRB081024B: P200 Observations
  68. GRB 081024B: Swift-XRT further observations
  69. GRB 081025 BAT refined analysis
  70. Swift UVOT observations of GRB081025
  71. Swift UVOT observations of GRB081024B
  72. Konus-Wind observation of GRB 081025
  73. GRB 081025: Swift-XRT position
  74. GRB 081024B: Swift-XRT observations
  75. GRB 081024B: Fermi Gamma-ray Burst Monitor detection
  76. Swift UVOT observations of GRB 081024
  77. GRB 081024: Swift-XRT refined analysis
  78. GRB 081024, Swift-BAT refined analysis
  79. GRB 081024: Faulkes Telescope North optical observations
  80. GRB 081024: KAIT Optical Limits
  81. GRB 081024: Early Super-LOTIS Observations
  82. GRB 081024A: ROTSE-III Optical Limits
  83. GRB 081022, Swift-BAT refined analysis
  84. GRB 081016A: Swift-XRT refined analysis
  85. GRB 081012: Swift-XRT Refined Analysis
  86. Swift trigger 332287 is not a GRB
  87. GRB 081017, Swift-BAT refined analysis
  88. GRB 081017: REM early observations
  89. GRB 081016B, Swift-BAT refined analysis
  90. GRB 081016B: Swift/UVOT Upper Limits
  91. GRB 081011: Swift XRT refined analysis
  92. GRB 081016B: Swift-XRT Team refined Analysis
  93. GRB 081016B: ROTSE-III Optical Limits
  94. GRB 081016: Swift-XRT candidate afterglow detection
  95. Detection of flare star Algol in Swift-BAT slew data
  96. GRB 081012: GROND upper limits
  97. GRB 081008: Galaxy associated with z=1.967 absorber
  98. GRB 081012: Fermi GBM detection
  99. GRB 081007 and GRB 081007B: Fermi GBM detection
  100. GRB 080430: optical observations

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