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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"

26505 results found.

  1. GRB 090102: Swift-BAT refined analysis
  2. GRB 090102: Swift burst of interest
  3. GRB 090102: Swift XRT refined analysis
  4. GRB 090102: NOT redshift
  5. GRB 090102: Enhanced Swift-XRT position
  6. GRB 090102: TAROT Calern observatory optical light curve
  7. GRB 090102: REM observations of a bright afterglow
  8. GRB 090102: Swift detection of a burst with an optical counterpart
  9. GRB 090102: TAROT Calern observatory optical observations
  10. GRB 081230, Swift-BAT refined analysis
  11. GRB081230: Swift-XRT refined analysis
  12. GRB 081230 Swift/UVOT Observations
  13. GRB 081230: Enhanced Swift-XRT position
  14. GRB 081230: Swift detection of a burst
  15. GRB 081228: GROND confirmation of the optical/NIR afterglow
  16. GRB 081226B: Fermi GBM observation
  17. GRB 081226C: Fermi GBM detection
  18. GRB 081228, Swift-BAT refined analysis
  19. VLA radio detection of GRB 081221
  20. GRB 081228: Swift/UVOT Upper Limits
  21. GRB 081228: Swift-XRT Team refined analysis
  22. GRB 081228: detection by GROND
  23. GRB 081228: Enhanced Swift-XRT position
  24. GRB 081228: TAROT Calern observatory optical observations
  25. GRB 081228: Swift detection of a burst
  26. VLA radio observation of GRB 081221
  27. GRB 081224: Suzaku WAM observation of the prompt emission
  28. GRB 081226: Swift-XRT refined analysis
  29. GRB 081226A: Swift-BAT refined analysis
  30. GRB 081226B: a short-hard GRB detected by INTEGRAL
  31. GRB 081226: Gemini-South imaging
  32. GRB 081226: Swift detection of a possible short-hard burst
  33. GRB 080810: optical observations
  34. GRB 080810: optical observations
  35. Konus-Wind observation of GRB 081222
  36. GRB 081223: Fermi GBM detection
  37. GRB 081221: GROND observations
  38. GRB 081222:Optical afterglow observation
  39. VLA radio upper limit on GRB 081222
  40. GRB 081222: Fermi GBM observation
  41. GRB 081221: Probable host galaxy in Keck imaging
  42. GRB 081204C: Fermi GBM detection
  43. GRB 081222, Swift-BAT refined analysis
  44. GRB 081221, Swift-BAT refined analysis
  45. GRB081222 optical limit by "Pi of the Sky"
  46. Konus-Wind observation of very bright GRB 081215A
  47. GRB 081222: Swift XRT refined analysis
  48. GRB081221: Fermi GBM observation
  49. GRB 081221: Swift-XRT Refined Analysis
  50. GRB 081221: pseudo-redshift (pz=0.7) from the spectral parameters of the prompt emission
  51. GRB 081222: Faulkes Telescope South observations
  52. Konus-Wind observation of GRB 081221
  53. GRB 081222: GROND Detection of the Optical/NIR Afterglow
  54. GRB 081222: Swift detection of a burst with a bright optical afterglow
  55. GRB 081221: Enhanced Swift-XRT position
  56. GRB 081221: further NOT observations
  57. GRB 081221: Swift detection of a burst
  58. GRB 081217: Fermi GBM detection
  59. GRB081215A: Fermi-LAT observations
  60. GRB 081211B: Further Swift-XRT analysis
  61. GRB 081215B: Fermi GBM detection
  62. GRB 081216: Suzaku WAM observation of the prompt emission
  63. GRB 081216 : Fermi GBM observation
  64. GRB 081215A: Fermi GBM detection
  65. GRB 081211B - possibly a short burst with extended emission
  66. GRB 081118: Zadko observations
  67. GRB 081207: Fermi GBM detection
  68. GRB 081209: Fermi GBM detection
  69. Fermi Gamma-ray Burst Monitor trigger 250533995 is not a GRB
  70. GRB 081007: Detection of a Supernova
  71. GRB 081211B(?): Possible burst detection from Swift-BAT slew data
  72. GRB 081211: Swift-BAT refined analysis
  73. GRB 081211: Enhanced Swift-XRT position
  74. GRB 081211: Swift detection of a burst
  75. GRB 081210: Swift-XRT refined analysis
  76. GRB 081210: Enhanced Swift-XRT position
  77. GRB 081210: Swift-BAT refined analysis
  78. GRB 081210: Swift detection of a burst with optical afterglow
  79. Konus-Wind observation of GRB 081209
  80. GRB 081206C: Fermi GBM detection
  81. Radio observation of GRB 081121 with ATCA
  82. Radio observation of GRB 081118 with ATCA
  83. GRB 081206: Fermi GBM detection
  84. GRB 081128: afterglow observations
  85. GRB 081203B: Suzaku WAM observation of the prompt emission
  86. GRB 081203B: Additional Gemini imaging
  87. Radio observation of GRB 081109 with ATCA
  88. Radio observation of GRB 081104 with ATCA
  89. Radio observation of GRB 081029 with ATCA
  90. Radio observation of GRB 081008 with ATCA
  91. GRB081203A: Ashra-1 observation of early optical and VHE-neutrino emission
  92. GRB 081128: Optical afterglow observations
  93. GRB 081204: GROND Observations
  94. Radio detection of GRB 081203B with the VLA
  95. GRB 081204B: Fermi GBM detection
  96. GRB 081204 : a long GRB localized by INTEGRAL
  97. VLA Radio upper limit on GRB 081203A
  98. Swift-XRT observations of GRB 081203B
  99. Konus-Wind observation of GRB 081203A
  100. Konus-Wind observation of GRB 081203B

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