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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"

11630 results found.

  1. GRB 160220A: nIR observations at AAT
  2. IPN Triangulation of GRB 160219A (short/hard)
  3. GRB 160220A: Fermi GBM observation
  4. LIGO/Virgo G184098: MASTER arhival results
  5. Konus-Wind observation of GRB 160216A (and GRB 160216B)
  6. Fermi GBM trigger 477254668/160215781 is not a GRB
  7. GRB 160206B: Fermi GBM detection
  8. GRB 160206B: iPTF P48 Observations and Optical Transient Candidates
  9. Fermi GBM trigger 475675010/160128498 is not a GRB
  10. GRB 160118A CALET Gamma-Ray Burst Monitor detection
  11. Konus-Wind observation of GRB 160113A
  12. GRB 160106A: CALET Gamma-Ray Burst Monitor detection
  13. IPN Triangulation of GRB 160113A
  14. Konus-Wind observation of GRB 151231A
  15. GRB 160113A: Swift-XRT observations
  16. GRB 160113A: Fermi GBM detection
  17. GRB 160113A: Swift ToO observations
  18. GRB 160113A: iPTF P48 Observations and Optical Transient Candidates
  19. Konus-Wind observation of GRB 160107A
  20. IPN Triangulation of GRB 151231A
  21. GRB 160107A: CALET Gamma-Ray Burst Monitor detection
  22. GRB 160107A: Fermi GBM observation
  23. Konus-Wind observation of GRB 160101A
  24. GRB 160104A: Fermi GBM observation
  25. LIGO/Virgo G211117: Fermi/LAT observations
  26. GRB 160101B: Fermi-LAT detection
  27. GRB 160101B: Fermi GBM detection
  28. GRB 160101A: Fermi GBM observation
  29. GRB 151231B: Fermi GBM observation
  30. GRB 151231A: Fermi GBM observation
  31. Konus-Wind observation of GRB 151227B
  32. IPN Triangulation of GRB 151227B
  33. GRB 151229A: Fermi GBM observation
  34. GRB 151228B: Fermi GBM observation
  35. LIGO/Virgo G211117: DESGW program observations with DECam
  36. LIGO/Virgo G211117: Fermi GBM Observations
  37. GRB 151228A: Fermi GBM observation
  38. GRB 151227B: Fermi GBM detection
  39. GRB 151227A: Fermi GBM detection
  40. Konus-Wind observation of GRB 151222A
  41. Fermi GBM trigger 472694170/151224997 is not a GRB
  42. IPN Triangulation of GRB 151222A (short/hard)
  43. Fermi GBM trigger 151221730 is not a GRB
  44. GRB 151222A: Fermi GBM detection
  45. Fermi GBM trigger 151221690 is not a GRB
  46. Fermi GBM trigger 472271765/151220108 is not a GRB
  47. Fermi GBM trigger 472166503/151218890 is not a GRB
  48. LIGO/Virgo G184098: Fermi-LAT search for high-energy gamma-ray counterpart
  49. GRB 151212B: CALET Gamma-Ray Burst Monitor detection
  50. GRB 151210B: Fermi GBM observation
  51. GRB 151210B: CALET Gamma-Ray Burst Monitor detection
  52. GRB 151205A: Fermi GBM detection
  53. Fermi GBM trigger 470712580/151202062 is not a GRB
  54. Fermi GBM trigger 470290196/151127174 is not a GRB
  55. Fermi GBM trigger 470375959/151128166 is not a GRB
  56. GRB 151122A: Fermi GBM detection
  57. GRB 151122A: Swift detection of a burst
  58. Konus-Wind observation of GRB 151120A
  59. GRB 151120A: Fermi GBM observation
  60. LIGO/Virgo G194575: Fermi GBM Observations
  61. GRB 151107B: CALET Gamma-Ray Burst Monitor detection
  62. LIGO/Virgo G194575: VLA follow-up
  63. GRB 151111A: Fermi GBM observation
  64. GRB 151107B: MASTER-NET OT detection inside the FERMI error box
  65. GRB 151107B: Mini-MegaTORTORA limits on simultaneous optical emission
  66. GRB 151107B
  67. GRB 151027A: the missing GeV component
  68. GRB 151030A: Fermi GBM observation
  69. Konus-Wind observation of GRB 151027A
  70. GRB 151027A: Fermi GBM observation
  71. GRB 151006A: CALET Gamma-Ray Burst Monitor detection
  72. Possible Fermi-LAT Gamma-ray counterpart for LIGO/Virgo G194575
  73. LIGO/Virgo G194575: Fermi GBM Observations
  74. LIGO/Virgo G194575: Identification of a GW CBC Candidate
  75. GRB 151021B: Fermi GBM detection
  76. Fermi GBM trigger 466602792/151015495 is not a GRB
  77. Fermi GBM trigger 466316973/151012187 is not a GRB
  78. Fermi GBM trigger 466059859/151009211 is not a GRB
  79. Konus-Wind observation of GRB 151006A
  80. GRB 151006A: Fermi-LAT detection
  81. GRB 151006A: Fermi GBM detection
  82. GRB 151001A: Fermi GBM detection
  83. Konus-Wind observation of GRB 150922A
  84. GRB 150922A: Fermi GBM observation
  85. IPN Triangulation of GRB 150922A (short/hard)
  86. LIGO/Virgo G184098: INTEGRAL search of temporally coincident prompt hard X-ray emission
  87. ANTARES neutrino detection: Fermi GBM Observations
  88. Fermi GBM trigger bn150920977 is not due to a GRB
  89. LIGO/Virgo G184098: DESGW followup program
  90. LIGO/Virgo G184098: DESGW followup program
  91. LIGO/Virgo G184098: Fermi-GBM ground-based follow-up
  92. Fermi GBM trigger 463890496/150914103 is not a GRB
  93. GRB 150912A: Fermi GBM observation
  94. Fermi GBM trigger 463422723/150908689 is not a GRB
  95. Fermi GBM trigger 463339482/150907725 is too weak to be classified
  96. Fermi GBM trigger 150907763 is not a GRB
  97. GRB 150906A: Fermi GBM detection
  98. GRB 150902A: Swift-XRT afterglow detection
  99. GRB 150902A: Swift-XRT observations
  100. GRB 150902A: MASTER-SAAO optical observations

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