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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"

11559 results found.

  1. Fermi trigger No 663886592: Global MASTER-Net observations report
  2. Fermi trigger No 663966693: Global MASTER-Net observations report
  3. GRB 220115B: Fermi GBM Final Real-time Localization
  4. Fermi trigger No 663927396: Global MASTER-Net observations report
  5. Fermi trigger No 663921434: Global MASTER-Net observations report
  6. GRB 220115A: Fermi GBM Final Real-time Localization
  7. IceCube-220115A - IceCube observation of a high-energy neutrino candidate track-like event
  8. Fermi Gamma-ray Burst Monitor trigger 663917434/220115230 is not a GRB
  9. GRB 220114A: Fermi GBM Final Localization
  10. Fermi trigger No 663763320: Global MASTER-Net observations report
  11. Fermi trigger No 663710289: Global MASTER-Net observations report
  12. Fermi-GBM Observations of Recent Bursting Activity from SGR J1935+2154
  13. Fermi trigger No 663669570: Global MASTER-Net observations report
  14. GRB 220111A: AstroSat CZTI detection
  15. Fermi trigger No 663658976: Global MASTER-Net observations report
  16. Fermi trigger No 663618072: Global MASTER-Net observations report
  17. Fermi GRB 220111A: Global MASTER-Net observations report
  18. GRB 220111A: BALROG localization (Fermi Trigger 663621714 / GRB 220111807)
  19. GRB 220111A: Fermi GBM Final Real-time Localization
  20. Konus-Wind detection of GRB 220101A
  21. Fermi Gamma-ray Burst Monitor trigger 220111325/663580106 is not a GRB
  22. GRB 220107A: SAO RAS optical observations
  23. Konus-Wind detection of GRB 220107B
  24. Konus-Wind detection of GRB 220107A
  25. Confirmation of the X-ray afterglow of GRB 220107B
  26. GRB 220107A: further SAO RAS optical observations
  27. Fermi trigger No 663406755: Global MASTER-Net observations report
  28. GRB 220107A: 6m BTA spectroscopic redshift
  29. GRB 220107A: SAO RAS optical observations
  30. GRB 220101A: SAO RAS optical observations
  31. GRB 220107A: AbAO and Terskol optical observations
  32. GRB 220107B: MITSuME Akeno optical upper limits
  33. GRB 220107B: Nanshan/NEXT optical upper limits and host galaxy candidate
  34. GRB 220107A: Nanshan/NEXT optical observations
  35. GRB 220107A: Swift/UVOT Detection
  36. GRB 220107B: Fermi GBM observations
  37. GRB 220107A: MITSuME Akeno optical observation
  38. GRB 220107B: AstroSat CZTI detection
  39. GRB 220107B: Swift-XRT afterglow detection
  40. GRB 220107B: Fermi-LAT detection
  41. GRB 220107A: AstroSat CZTI detection
  42. GRB 220107B: Tiled Swift observations
  43. GRB 220107A: Fermi GBM observations
  44. Fermi trigger No 663274898: Global MASTER-Net observations report
  45. Fermi GRB 220107A: Global MASTER-Net observations report
  46. GRB 220107A: Swift/BAT-GUANO arcminute localization
  47. GRB 220107A: BALROG localization (Fermi Trigger 663259536 / GRB 220107615)
  48. GRB 220107A: Fermi GBM Final Real-time Localization
  49. GRB 220101A: Continued Mondy optical observations
  50. GECAM observation of a burst from SGR J1555.2-5402
  51. Fermi trigger No 663129379: Global MASTER-Net observations report
  52. GRB 220104A: Fermi GBM Observation
  53. GRB 220101A: Mondy optical observations
  54. GRB 220101A: 2.2m CAHA (+CAFOS) first day optical detection
  55. GRB 220104A：GECAM detection
  56. Fermi GRB 220104A: Global MASTER-Net observations report
  57. GRB 220104A: Fermi GBM Final Real-time Localization
  58. GRB 211229B: Fermi GBM observation
  59. Fermi GRB 220103A: Global MASTER-Net observations report
  60. GRB 220103A: Fermi GBM Final Real-time Localization
  61. GRB 211229B: Swift/BAT-GUANO detection outside the coded FOV
  62. GRB 211231A: AstroSat CZTI detection
  63. GRB 220101A : Eiso equals the maximum isotropic GRB energy
  64. Fermi trigger No 662768315: Global MASTER-Net observations report
  65. GRB 220101A: Fermi GBM Detection
  66. GRB 220101A: CAHA 2.2m/CAFOS detection
  67. GRB 220101A: AGILE detection
  68. GRB 220101A: Xinglong-2.16m photometry and spectroscopy
  69. GRB 220101A: Fermi-LAT detection
  70. IPN triangulation of GRB 211219A
  71. GRB 211231A: GECAM detection
  72. GRB 211229B: AGILE detection
  73. GRB 211231A: Fermi GBM Final Real-time Localization
  74. GRB 211229A: Swift-XRT and UVOT observations
  75. GRB 211229A: Fermi GBM observation
  76. GRB 211229B: GECAM detection
  77. Fermi GRB 211229B: Global MASTER-Net observations report
  78. GRB 211229B: Fermi GBM Final Real-time Localization
  79. GRB 211229A: Swift/BAT-GUANO arcminute localization
  80. GRB 211229A: GECAM detection
  81. Fermi GRB 211229A: Global MASTER-Net observations report
  82. GRB 211229A: Fermi GBM Final Real-time Localization
  83. Fermi trigger No 662216114: Global MASTER-Net observations report
  84. Fermi GRB 211225C: Global MASTER-Net observations report
  85. GRB 211225C: Fermi GBM Final Real-time Localization
  86. Fermi trigger No 662084433: Global MASTER-Net observations report
  87. GRB 211224A: Fermi GBM Final Real-time Localization
  88. GRB 211211A: observations with the 3.6m Devasthal Optical Telescope
  89. Fermi trigger No 662010159: Global MASTER-Net observations report
  90. AGILE observations of a bright burst from SGR 1935+2154
  91. Fermi GRB 211223B: Global MASTER-Net observations report
  92. Fermi GBM Sub-Threshold Detection of GRB 211221A
  93. Fermi GBM Sub-Threshold Detection of GRB 211207A
  94. GRB 211223B: Fermi GBM Final Real-time Localization
  95. GRB 211223A: GECAM detection
  96. GRB 211219B: AstroSat CZTI detection
  97. GRB 211219A: AstroSat CZTI detection
  98. Fermi GRB 211222A: Global MASTER-Net observations report
  99. GRB 211222A: Fermi GBM Final Real-time Localization
  100. GRB 211219A: AGILE detection

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