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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"

37351 results found.

  1. GRID detection of GRB 240306A
  2. Changes to the Fermi-GBM Triggering Thresholds
  3. GRB 240315A: Fermi GBM Final Real-time Localization
  4. Fermi GRB 240314A: Global MASTER-Net observations report
  5. GRB 240314A: Fermi GBM Final Real-time Localization
  6. GRB 240312A: Glowbug gamma-ray detection
  7. Swift Trigger 1219905 is not a GRB
  8. GRB 240312A: GECAM detection of a long burst
  9. GRB 240303C: VZLUSAT-2 detection
  10. GRB 240310A: MASTER OT J200702.72-263928.7 inside 3sigma
  11. GRB 240310B: Glowbug gamma-ray detection
  12. Fermi GRB 240310A: Global MASTER-Net observations report
  13. GRB 240310A: Fermi GBM Final Real-time Localization
  14. GRB 240309A: MAXI/GSC detection
  15. Swift Trigger 1219325 is not a GRB
  16. GRID detection of GRB 240229A (Updated Report)
  17. GRID detection of GRB 240229A
  18. GRB 240308A: Fermi GBM Final Localization
  19. GRB 231215A: further radio observations with the VLA
  20. GRB 240306A: Fermi GBM observation
  21. GRB 240229A: Glowbug gamma-ray detection
  22. GRB 240227A (short): Glowbug gamma-ray detection
  23. GRB 240229A: GRBAlpha detection
  24. Konus-Wind detection of GRB 231118A
  25. GRB 240306A: AstroSat CZTI detection
  26. Fermi GRB 240306A: Global MASTER-Net observations report
  27. Fermi GRB 240305A: Global MASTER-Net observations report
  28. GRB 240306A: Swift/BAT-GUANO detection of a burst
  29. GRB 240305A: Fermi GBM observation
  30. GRB 240305C: AstroSat CZTI detection of a short burst
  31. GRB 240306A: Fermi GBM Final Real-time Localization
  32. Fermi GRB 240305C: Global MASTER-Net observations report
  33. GRB 240305C: Fermi GBM Final Real-time Localization
  34. GRB 240305A: Swift/BAT-GUANO arcminute localization of a burst
  35. GRB 231028C: Glowbug gamma-ray confirmation of a prior burst
  36. GRB 240218A: ALMA detection
  37. GRB 240218A: Chandra Detection and Jet Break Confirmation
  38. GRB 240305B: Fermi GBM Final Localization
  39. Konus-Wind detection of GRB 240227A (short/hard)
  40. GRB 240303B: VZLUSAT-2 detection
  41. GRB 240229A: VZLUSAT-2 detection
  42. Improved IPN triangulation of GRB 240227A (short)
  43. IPN triangulation of GRB 240229A
  44. GRB 240305A: Fermi GBM Final Real-time Localization
  45. Konus-Wind detection of GRB 240303B
  46. IPN triangulation of GRB 240303B
  47. GRB 240303B: Fermi GBM Detection
  48. GRB 240225B: Swift-XRT afterglow detection
  49. Swift detection of Swift J151857.0-572147
  50. GRB 240303B: CALET Gamma-Ray Burst Monitor detection
  51. GRB 240303C: BALROG localization (Fermi Trigger 731189113 / GRB 240303837)
  52. Swift GRB 240303A: Global MASTER-Net observations report
  53. Swift J151857.0-572147: Confirmation of a new galactic transient
  54. GRB 240215A: Swift-XRT afterglow detection
  55. GRB 240303B: BALROG localization (Fermi Trigger 731161136 / GRB 240303513)
  56. GRB 240303B: Fermi GBM Final Localization
  57. GRB 240303A: Swift detection of a burst
  58. GRB 240225B: Glowbug gamma-ray detection
  59. GRB 240225C: Glowbug gamma-ray detection
  60. GRB 240225A (short): Glowbug gamma-ray detection
  61. GRB 240229A: DDOTI Upper Limits on the Afterglow
  62. GRB 240218A: NOEMA upper limit
  63. GRB 240229A: CALET Gamma-Ray Burst Monitor detection
  64. GRB 240225B: further SAO RAS optical observations
  65. Fermi GRB 240229A: Global MASTER-Net observations report
  66. GRB 240225B: Swift ToO observations
  67. Konus-Wind detection of GRB 240225B (long)
  68. GRB 240229A: BALROG localization (Fermi Trigger 730908432 / GRB 240229588)
  69. GRB 240229A: Fermi GBM Final Real-time Localization
  70. GRB 240225B: VLT/X-shooter redshift
  71. GRB 240225B : MITSuME Akeno optical afterglow candidate detection
  72. GRB 240225B: 3.6m DOT observation
  73. GRB 240225B: WINTER near-IR observations and upper limits
  74. GRB 240225B: SAO RAS optical observations
  75. GRB 240226A: GRBAlpha detection
  76. GRB 240225B: Mondy afterglow observations
  77. Fermi GRB 240227A: Global MASTER-Net observations report
  78. GRB 240225B: Liverpool Telescope afterglow observations
  79. Swift J1727.8-1613 (GRB 230824A): Madrona Peak Observatory - optical follow-up
  80. Swift Trigger 1217799 is not a GRB
  81. IPN triangulation of GRB 240227A (short)
  82. GRB 240225B: Liverpool Telescope optical afterglow observations
  83. GRB 240225B: NOT optical observations
  84. GRB 240218A: CMO SAI NIR upper limit
  85. Fermi GRB 240226A: Global MASTER-Net observations report
  86. GRB 240227A: Fermi GBM Final Real-time Localization
  87. Fermi Gamma-ray Burst Monitor trigger 730618809/240226236 is not a GRB
  88. GRB 240225B: Nanshan/HMT optical afterglow detection
  89. GRB 240225B: CALET Gamma-Ray Burst Monitor detection
  90. GRB 240225B: Swift-XRT observations
  91. GRB 240226B: Fermi GBM Final Real-time Localization
  92. GRB 240225C: CALET Gamma-Ray Burst Monitor detection
  93. GRB 240225B: GOTO detection of a candidate optical afterglow
  94. GRB 240226A: Fermi GBM Final Real-time Localization
  95. GRB 240225C: GRBAlpha detection
  96. GRB 240222A: ATCA radio observations
  97. GRB 240225C: AstroSat CZTI detection
  98. GRB 240225B: AstroSat CZTI detection
  99. GRB 240225B: Tiled Swift observations
  100. GRB 240225B: MAXI/GSC detection

Advanced

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