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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').

18081 results found.

  1. Radio observation of GRB 081121 with ATCA
  2. GRB 081203B: Suzaku WAM observation of the prompt emission
  3. Radio observation of GRB 081029 with ATCA
  4. Radio observation of GRB 081008 with ATCA
  5. GRB081203A: Ashra-1 observation of early optical and VHE-neutrino emission
  6. GRB 081128: optical observation in CrAO
  7. GRB 081128: Optical afterglow observations
  8. GRB 081204: GROND Observations
  9. GRB 081204: Swift/UVOT Upper Limits
  10. GRB 081204: Swift XRT afterglow confirmation
  11. GRB 081204: Swift XRT afterglow candidate
  12. Swift-XRT observations of GRB 081203B
  13. Konus-Wind observation of GRB 081203A
  14. Konus-Wind observation of GRB 081203B
  15. GRB081203A: Swift-XRT refined analysis
  16. GRB 081203B: optical observations
  17. Swift/UVOT detection of GRB081203B
  18. GRB 081203B: Swift-XRT candidate afterglow.
  19. GRB 081203A: optical observations
  20. Swift UVOT observations of GRB 081203A
  21. GRB 081203B: Naming correction for burst detected in Swift-BAT slew data
  22. GRB081203A: Swift/UVOT grism redshift
  23. GRB 081203A: Burst detection from Swift-BAT slew data
  24. GRB 081203A: Swift-BAT refined analysis
  25. GRB 081203: Enhanced Swift-XRT position
  26. GRB081203: optical observation
  27. GRB 081203: Swift detection of a burst with a bright optical counterpart
  28. GRB 081128: optical observation
  29. Swift Trigger 335971: Swift/UVOT Observations
  30. GRB 081126: Fermi GBM detection
  31. Swift Trigger 335971 is probably not a real source
  32. Trigger 335971: Swift possible detection of a burst
  33. GRB081128: Swift/UVOT Upper Limits
  34. GRB 081128: Swift-XRT refined analysis
  35. GRB081128: optical observations
  36. GRB 081128: Swift-BAT refined analysis
  37. GRB 081128: Enhanced Swift-XRT position
  38. GRB 081128: Swift detection of a burst
  39. GRB 081126: Swift observations continuing
  40. GRB081126: Afterglow photometry from Crni Vrh
  41. GRB 081126: GRT Optical Observation
  42. GRB 081127: Swift/UVOT Upper Limits
  43. GRB 081127: Swift-XRT refined analysis
  44. GRB 081127: Enhanced Swift-XRT position
  45. GRB 081126: Confirmation of the Optical Afterglow
  46. GRB 081127: Swift-BAT refined analysis
  47. GRB 081126: Swift-XRT refined analysis
  48. GRB 081127: Swift detection of a burst
  49. GRB 081126: Swift/UVOT Observations
  50. GRB 081126: optical observations
  51. GRB 081126: Swift-BAT refined analysis
  52. GRB 081126: Enhanced Swift-XRT position
  53. GRB 081126: TAROT Calern observatory optical observations
  54. GRB 081126: Swift detection of a burst
  55. Konus-Wind observation of GRB 081121
  56. GRB081121: Fermi GBM detection
  57. GRB081121: Refined Swift/UVOT observations
  58. GRB 081121: Swift-XRT refined analysis
  59. GRB 081121: Enhanced Swift-XRT position
  60. GRB 081121: GROND observations
  61. GRB 081121: Swift-BAT refined analysis
  62. GRB081121: Swift/UVOT observations
  63. GRB 081121: Swift detection of a burst
  64. GRB 081121: ROTSE-III Detection of Optical Counterpart
  65. GRB081118 : optical upper limit
  66. GRB 081118: Swift-XRT refined analysis
  67. GRB 081118: GROND detection of afterglow
  68. GRB 081118: Swift UVOT Upper Limits
  69. GRB 081118: Swift-BAT refined analysis
  70. GRB 081118: Enhanced Swift-XRT position
  71. GRB 081118: Swift detection of a burst
  72. GRB 081109A: confirmation of possible detection host galaxy
  73. Further Swift-XRT observations of the probable GRB 081105.
  74. GRB 081102: RTT150 Optical observations
  75. GRB 081109: TAROT La Silla observatory optical observations
  76. GRB 081102: MASTER refind and final results
  77. GRB 081109: GROND redshift limit and host extinction
  78. GRB 081025: Swift-XRT further analysis
  79. GRB 081024B: Swift-XRT late-time observations
  80. Swift-BAT refined analysis of trigger 334129
  81. GRB 081109B: Swift/UVOT refined analysis
  82. GRB 081109: GROND Detection of the Optical/NIR Afterglow Candidate
  83. GRB 081109A: Possible Swift-UVOT detection
  84. GRB 081109A, Swift-BAT refined analysis
  85. GRB 081109A: Swift-XRT refined analysis
  86. GRB 081109: Fermi GBM detection
  87. GRB 081109: Swift/UVOT upper limits
  88. Swift-BAT Trigger 334129: possible burst
  89. GRB 081109: Swift detection of a burst
  90. GRB 081105: GROND Upper Limits
  91. UVOT/Swift observations of GRB081105
  92. Swift-XRT observations of GRB 081105
  93. GRB 081105 Swift/BAT and IPN Localization
  94. GRB 081025: Fermi GBM observation
  95. GRB 081104: GROND Detection of the Optical/NIR Afterglow Candidate?
  96. GRB 081104: refined XRT analysis
  97. GRB 081104: Enhanced Swift-XRT position
  98. GRB 081104: Swift-BAT refined analysis
  99. GRB081104: Swift/UVOT Upper Limits
  100. Fermi Detection of GRB 081102

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