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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"

14856 results found.

  1. GRB 090902B: ROTSE-III Detection of Optical Afterglow
  2. GRB 090902B: Swift/UVOT refined analysis
  3. GRB090902B: Swift/UVOT observations
  4. GRB 090902B: Swift/XRT Afterglow Candidate
  5. GRB 090902B: Fermi LAT detection
  6. GRB 090902B: Fermi GBM detection of a bright burst
  7. GRB 090902: Fermi GBM detection
  8. GRB 090829B: Fermi GBM Detection
  9. GRB 090831C: Swift detection of a burst
  10. GRB 090831: MAXI GSC detection
  11. GRB 090831B: Swift detection of a possible burst
  12. GRB 090831: Fermi GBM detection
  13. GRB090829: Fermi GBM Detection
  14. GRB 090826: Fermi GBM detection
  15. GRB 090828: Fermi GBM detection
  16. GRB 090823: Swift XRT possible detection of the X-ray afterglow
  17. GRB 090820: detection of a strong burst by RT-2 on board CORONAS PHOTON
  18. GRB 090820B: Fermi GBM detection
  19. GRB 090820: Fermi GBM Detection of a bright burst.
  20. VLA radio non-detection of GRB 090812
  21. GRB 090815B: Fermi GBM detection
  22. GRB 090815: Fermi GBM detection
  23. GRB 090814C: Fermi GBM detection
  24. GRB 090814B: Swift-XRT detection of a possible afterglow.
  25. GRB090814A: VLT spectroscopy
  26. GRB 090814: GROND Detection of an Optical Afterglow Candidate
  27. GRB 090814: Swift detection of a burst
  28. GRB 090813: Liverpool Telescope afterglow confirmation
  29. GRB 090813: Swift detection of a burst
  30. GRB090812: Swift/UVOT observations
  31. GRB 090812: Swift detection of a burst with an optical counterpart
  32. GRB 090807B: Fermi GBM detection
  33. GRB 090809B: Fermi GBM detection
  34. GRB090809: Swift/UVOT observations
  35. GRB 090809: Swift detection of a burst with a possible optical counterpart
  36. GRB 090807: Swift detection of a burst
  37. GRB 090802B: Fermi GBM detection
  38. GRB 090802: Fermi GBM detection
  39. Swift-BAT trigger 358760 is most likely not a GRB
  40. GRB 090728: Swift/UVOT Upper Limits
  41. GRB 090728: Swift detection of a burst
  42. GRB 090727: Swift detection of a burst
  43. GRB 090726: Afterglow candidate photometryfrom Crni Vrh
  44. GRB 090711: Fermi GBM detection
  45. GRB090726: 6-meter telescope redshift
  46. GRB 090726: Swift detection of a burst
  47. GRB 090720B: Fermi GBM detection
  48. GRB 090715B: VLA radio detection
  49. GRB 090717B: Fermi GBM detection
  50. GRB 090717: Fermi GBM detection
  51. GRB 090719: Fermi GBM detection
  52. GRB 090718B: Fermi GBM detection
  53. GRB 090718: Fermi GBM detection
  54. GRB 090720: Fermi GBM detection
  55. GRB 090715B: break in the optical afterglow decay
  56. GRB 090715B: Swift detection of a burst with a possible optical counterpart
  57. GRB 090715: Swift detection of a short hard burst
  58. Detection of GRB 090618 by RT-2 Experiment onboard the CORONAS-PHOTON Satellite
  59. GRB 090713: Fermi GBM detection
  60. GRB 090712: Swift detection of a burst
  61. GRB 090709A: deep optical observation with the 10.4m GTC
  62. GRB 090709B: Fermi GBM detection
  63. GRB 090709A: Quasiperiodic variations in the BAT light curve
  64. GRB090709A: High Energy BAT/XRT Analysis Suggests Low to Moderate Redshift
  65. GRB 090709A - PAIRITEL Discovery of a Red Afterglow
  66. GRB 090709B: Swift detection of a burst
  67. GRB 090708 : Fermi GBM detection
  68. GRB 090709: Faulkes Telescope North Upper Limits
  69. GRB 090709: Swift detection of a bright burst
  70. GRB 090708: Swift detection of a burst
  71. GRB 090706: Fermi GBM detection
  72. GRB 090705: Swift detection of a possible burst
  73. GRB 090703: Fermi GBM detection
  74. GRB 090701: Fermi GBM detection
  75. GRB 090630: Fermi GBM detection
  76. GRB 090628: Swift detection of a burst
  77. GRB 090625B: Swift/UVOT Upper Limits
  78. GRB 090626: Fermi GBM detection
  79. GRB 090625: Fermi GBM detection
  80. GRB 090623: Fermi GBM detection
  81. GRB 090621B: Fermi GBM detection
  82. GRB 090621B: I-band observations from 1.23m CAHA
  83. GRB 090621D: Fermi GBM detection
  84. GRB 090621C: Fermi GBM detection
  85. GRB 090621B: Swift detection of a short hard burst
  86. GRB090618: Spectrum and photometry from 6.0m BTA
  87. GRB 090621: Swift detection of a burst
  88. GRB 090618 : WSRT radio detection
  89. VLA radio detection of GRB 090618
  90. GRB 090618 15GHz radio detection
  91. GRB090618: Swift/UVOT bright afterglow detection
  92. GRB 090618: SDSS host detection
  93. GRB 090617: Fermi GBM detection
  94. GRB 090618: LOAO R-band Observation
  95. GRB 090618: ROTSE-III Detection of Optical Counterpart
  96. GRB 090618: Swift detection of a bright burst with optical afterglow
  97. GRB 090616: Fermi GBM detection
  98. GRB 090612: Fermi GBM detection
  99. GRB 090610C: Fermi GBM detection
  100. GRB 090610B: Fermi GBM detection

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