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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"

11649 results found.

  1. GRB 240204A: optical afterglow detection with LCOGT 1m telescopes at Sutherland and Teide Observatories
  2. GRB 240204A: Montarrenti Observatory optical observations
  3. GRB 240204A: Mondy optical afterglow candidate
  4. Fermi Gamma-ray Burst Monitor trigger 728706420/240204102 is not a GRB
  5. Fermi GRB 240204A: Global MASTER-Net observations report
  6. Fermi trigger No 728706420: Global MASTER-Net observations report
  7. GRB 240204A: Swift detection of a burst
  8. IceCube-240204A - IceCube observation of a high-energy neutrino candidate track-like event
  9. GRB 240204A: Fermi GBM Final Real-time Localization
  10. GRB 230812B: Update on Bad Time Intervals for Fermi GBM data
  11. GRB 240129A: Fermi GBM Observation
  12. IPN triangulation of GRB 240125B (short)
  13. GRB 240129A: Swift/BAT-GUANO detection of a burst outside the coded FOV
  14. Fermi GRB 240127A: Global MASTER-Net observations report
  15. GRB 240127A: Fermi GBM Final Real-time Localization
  16. GRB 240125B: Fermi GBM Final Localization
  17. GRB 240123B: Fermi GBM Observation
  18. GRB 240123A: Glowbug gamma-ray detection
  19. GRB 240123B: Swift/BAT-GUANO detection of a long burst
  20. GRB 240123A: GRBAlpha detection
  21. Fermi-LAT gamma-ray observations of IceCube-240123A
  22. Fermi/GBM trigger 727752941: BALROG analysis retraction
  23. GRB 240124A?: BALROG localization (Fermi Trigger 727752941 / GRB 240124066)
  24. Fermi GRB 240123B: Global MASTER-Net observations report
  25. Fermi GBM Sub-Threshold Detection of GRB 240123A
  26. GRB 240123B: Fermi GBM Final Real-time Localization
  27. IceCube-240123A - IceCube observation of a high-energy neutrino candidate track-like event
  28. Konus-Wind detection of GRB 240119A (short/hard)
  29. IPN triangulation of GRB 240119A (short)
  30. GRB 240119A: GECAM detection of a short burst
  31. GRB 240118C: GECAM-B detection of a long burst
  32. GRB 240119A: AstroSat CZTI detection of a short burst
  33. GRB 240118A: Mondy optical observations
  34. GRB 240118A: Swift-XRT afterglow detection
  35. GRB 240118C: Fermi GBM Observation
  36. Fermi GRB 240119A: Global MASTER-Net observations report
  37. GRB 240119A: Fermi GBM Final Localization
  38. GRB 240118C: Swift/BAT-GUANO detection of a burst
  39. GRB 240118A: GRBAlpha detection
  40. GRB 240115A: Fermi GBM Observation
  41. GRB 240118C: Fermi GBM Final Localization
  42. GRB 240118A: Swift ToO observations
  43. GRB 240118A: AbAO optical upper limit
  44. Fermi GRB 240118B: Global MASTER-Net observations report
  45. GRB 240118A: NuSTAR Offline Analysis of the GRB
  46. GRB 240118A: Swift/BAT-GUANO detection of a burst outside the coded FOV
  47. Konus-Wind detection of GRB 240118A
  48. GRB 240118C: BALROG localization (Fermi Trigger 727291408 / GRB 240118725)
  49. GRB 240118A: NuSTAR Detection of a Long GRB
  50. GRB 240118A: Fermi GBM Observation
  51. GRB 240118B: Fermi GBM Final Real-time Localization
  52. GRB 240118A: Fermi-LAT detection
  53. GRID detection of GRB 231230A
  54. GRB 240118A: Fermi GBM Final Real-time Localization
  55. GRB 240115A: Swift/BAT-GUANO detection of a short burst
  56. GRB 240115B: AstroSat CZTI detection
  57. GRB 240115B: Fermi GBM Detection
  58. GRB 240112D: Glowbug gamma-ray detection
  59. GRB 240112C: Glowbug gamma-ray detection
  60. GRB 240112C: VZLUSAT-2 detection
  61. GRB 240107A: VZLUSAT-2 detection
  62. Fermi GRB 240115B: Global MASTER-Net observations report
  63. GRB 240115B: A long GRB detected by INTEGRAL
  64. GRB 240115B: Fermi GBM Final Real-time Localization
  65. Konus-Wind detection of GRB 240112C
  66. Fermi GRB 240115A: Global MASTER-Net observations report
  67. GRB 240115A: Fermi GBM Final Real-time Localization
  68. GRB 240112C: GRBAlpha detection
  69. GRB 240112C: Fermi GBM Detection
  70. Fermi trigger No 726773850: Global MASTER-Net observations report
  71. GRB 240112E: Fermi GBM Final Localization
  72. Fermi GRB 240112D: Global MASTER-Net observations report
  73. GRB 240112D: Fermi GBM Final Real-time Localization
  74. Fermi trigger No 726774492: Global MASTER-Net observations report
  75. Fermi GRB 240112B: Global MASTER-Net observations report
  76. GRB 240112B: Fermi GBM Final Real-time Localization
  77. GRB 240109A: Fermi GBM Observation
  78. Fermi-LAT detection of increased gamma-ray activity of blazar PKS 0446+11, located inside the IceCube-240105A error region
  79. GRB 231214A: ATCA Radio Upper Limits
  80. GRB 240106B: Glowbug gamma-ray detection
  81. GRB 240106A: Glowbug gamma-ray detection
  82. GRB 240109B: Fermi GBM Final Real-time Localization
  83. Konus-Wind detection of GRB 240101C
  84. GRB 231215A: radio detection with the VLA
  85. GRB 230818A: further radio observations with the VLA
  86. GRB 230812B: further radio observations with the VLA
  87. Update of IceCube-240105A - Corrected errors
  88. GRB 240106A: GRBAlpha detection
  89. Fermi trigger No 726347794: Global MASTER-Net observations report
  90. GRB 240106B: Fermi GBM Final Real-time Localization
  91. Fermi trigger No 726194053: Global MASTER-Net observations report
  92. GRB 240106A: Fermi GBM Final Real-time Localization
  93. IPN triangulation of GRB 240101C (short)
  94. GRB GRB240101C: Fermi GBM observation
  95. IceCube-240105A - IceCube observation of a high-energy neutrino candidate track-like event
  96. GRB 240101C: Swift/BAT-GUANO detection of a short burst
  97. GRB 240102C: AstroSat CZTI detection
  98. GRB 240101C: AstroSat CZTI detection
  99. GRB 231220A: Swift-UVOT upper limit
  100. GRB 240102B (Fermi GBM trigger 725926335/240102925) is not a GRB

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