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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"

11612 results found.

  1. GRB090922A: correction to Fermi location
  2. GRB 090922A: Fermi GBM detection
  3. GRB 090915: SARA detection of afterglow candidate
  4. GRB 090902B: Skynet/PROMPT Observations
  5. GRB 090915 Swift-BAT detection of a burst in ground analysis
  6. GRB 090910: Fermi GBM detection
  7. GRB 090904B: GROND detection of the optical afterglow
  8. GRB 090831A: Suzaku WAM observation of the prompt emission
  9. GRB 090902B: Suzaku WAM observation of the prompt emission
  10. GRB 090829A: Suzaku WAM observation of the prompt emission
  11. GRB 090904B: Fermi GBM detection
  12. GRB 090902B: ROTSE-III Detection of Optical Afterglow
  13. GRB 090902B: Swift/UVOT refined analysis
  14. GRB090902B: Swift XRT refined analysis
  15. GRB 090902B: Faulkes Telescope North observations
  16. GRB 090902B: GROND NIR Afterglow Observations
  17. GRB 090902B: Gemini-N absorption redshift
  18. GRB 090902B: Fermi LAT and GBM refined analysis.
  19. GRB 090902B: Optical afterglow candidate
  20. GRB090902B: Swift/UVOT observations
  21. GRB 090902B: Swift/XRT Afterglow Candidate
  22. GRB 090902B: Fermi LAT detection
  23. GRB 090902B: Fermi GBM detection of a bright burst
  24. GRB 090902: Fermi GBM detection
  25. GRB 090831A: IPN Triangulation
  26. GRB 090829B: Fermi GBM Detection
  27. GRB 090831: MAXI GSC detection
  28. GRB 090831: Fermi GBM detection
  29. GRB090829: Fermi GBM Detection
  30. GRB 090826: Fermi GBM detection
  31. GRB 090828: Fermi GBM detection
  32. Fermi Gamma-ray Burst Monitor trigger 273123112 is not a GRB
  33. GRB 090817 - TLS Observations
  34. GRB 090820: detection of a strong burst by RT-2 on board CORONAS PHOTON
  35. GRB 090820B: Fermi GBM detection
  36. GRB 090820: MASTER-Net optical polarization observations
  37. GRB 090820: Fermi GBM Detection of a bright burst.
  38. GRB 090817: Fermi GBM observation
  39. GRB 090813: Suzaku WAM observation of the prompt emission
  40. GRB 090815B: Fermi GBM detection
  41. GRB 090815: Fermi GBM detection
  42. Fermi Gamma-ray Burst Monitor trigger 271934815 is not a GRB
  43. GRB 090814C: Fermi GBM detection
  44. GRB 090813: Fermi GBM observation
  45. Fermi Gamma-ray Burst Monitor trigger 271446248 is not a GRB
  46. Fermi Gamma-ray Burst Monitor trigger 271833016 is not a GRB
  47. GRB 090807B: Fermi GBM detection
  48. GRB 090621B: MAGIC telescope GeV observation
  49. GRB 090621A: MAGIC telescope GeV observation
  50. GRB 090809B: Fermi GBM detection
  51. Fermi Gamma-ray Burst Monitor trigger 271275771 is not a GRB
  52. GRB 090802B: Fermi GBM detection
  53. GRB 090802: Fermi GBM detection
  54. GRB 090717A: Suzaku WAM observation of the prompt emission
  55. GRB 090711: Fermi GBM detection
  56. Konus-Wind and Konus-RF observations of GRB 090719
  57. Konus-RF and Konus-Wind observations of GRB 090718B
  58. Fermi Gamma-ray Burst Monitor triggers 269935914 through 270021937 are not GRBs
  59. Konus-Wind observations of bright hard GRB 090720B
  60. IPN Triangulation of bright GRB 090720B
  61. GRB 090720: Gemini-North Imaging and Optical Afterglow
  62. GRB 090720B: Fermi GBM detection
  63. Swift XRT and UVOT refned analysis of GRB 090720
  64. GRB 090720 Source found in ground processing of Swift-BAT data
  65. GRB 090717B: Fermi GBM detection
  66. GRB 090717: Fermi GBM detection
  67. GRB 090719: Fermi GBM detection
  68. GRB 090718B: Fermi GBM detection
  69. GRB 090718: Fermi GBM detection
  70. GRB 090720: Fermi GBM detection
  71. GRB090713 optical limit by "Pi of the Sky"
  72. GRB 090712: Fermi GBM observation
  73. GRB 090713: Fermi GBM detection
  74. GRB 090709B: Fermi GBM detection
  75. GRB 090708 : Fermi GBM detection
  76. GRB 090626: Suzaku WAM observation of the prompt emission
  77. GRB 090704: Fermi GBM observation
  78. GRB 090706: Fermi GBM detection
  79. GRB 090703: Fermi GBM detection
  80. GRB 090701: Fermi GBM detection
  81. GRB 090630: Fermi GBM detection
  82. Konus-Wind observation of GRB 090626
  83. GRB 090626: IPN localization
  84. Fermi LAT observations of GRB 090626
  85. GRB 090625B: Fermi GBM observation
  86. GRB 090626: Fermi GBM detection
  87. GRB 090623: Suzaku WAM observation of the prompt emission
  88. GRB 090625: Fermi GBM detection
  89. GRB 090617: Suzaku WAM observation of the prompt emission
  90. GRB 090623: Fermi GBM detection
  91. GRB 090621B: Fermi GBM detection
  92. GRB 090621D: Fermi GBM detection
  93. GRB 090621C: Fermi GBM detection
  94. GRB 090621: Fermi GBM observation
  95. GRB 090620: Fermi GBM detecion
  96. GRB 090618: Fermi GBM observation
  97. GRB 090617: Fermi GBM detection
  98. GRB 090616: Fermi GBM detection
  99. GRB 090612: Fermi GBM detection
  100. GRB 090610C: Fermi GBM detection

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Download all Circulars as a .tar.gz archive (updated once a day):
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