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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 240607A: GECAM detection of a bright long burst
  2. Fermi GRB 240611A: Global MASTER-Net observations report
  3. Konus-Wind detection of GRB 240607A
  4. GRB 240611A: Fermi GBM Final Real-time Localization
  5. Fermi GRB 240610A: Global MASTER-Net observations report
  6. GRB 240610A: Fermi GBM Final Real-time Localization
  7. IPN triangulation of GRB 240607A
  8. Fermi Gamma-ray Burst Monitor trigger 739632045/240609556 is not a GRB
  9. Fermi trigger No 739632045: Global MASTER-Net observations report
  10. Fermi GRB 240608A: Global MASTER-Net observations report
  11. Konus-Wind detection of GRB 240606B
  12. Fermi trigger No 739506569: Global MASTER-Net observations report
  13. GRB 240608A: Fermi GBM Final Real-time Localization
  14. Fermi GRB 240607A: Global MASTER-Net observations report
  15. GRB 240607A: Fermi GBM Observation
  16. GRB 240606B: Fermi GBM Observation
  17. GRB 240607A: AstroSat CZTI detection of bright long burst
  18. GRB 240607A: Fermi GBM detection of a very bright burst
  19. GRB 240607A: BALROG localization (Fermi Trigger 739450879 / GRB 240607459)
  20. GRB 240607A: Fermi GBM Final Real-time Localization
  21. Fermi trigger No 739373591: Global MASTER-Net observations report
  22. Konus-Wind detection of GRB 240603A
  23. Fermi GRB 240604A: Global MASTER-Net observations report
  24. Fermi GRB 240605A: Global MASTER-Net observations report
  25. Fermi GRB 240605C: Global MASTER-Net observations report
  26. Fermi Gamma-ray Burst Monitor trigger 739290883/240605607 is not a GRB
  27. GRB 240605C: Fermi GBM Final Real-time Localization
  28. IPN triangulation of GRB 240603A
  29. GRB 240605B: Fermi GBM Final Real-time Localization
  30. GRB 240604A: Fermi GBM Final Localization
  31. GRB 240605A: Fermi GBM Final Real-time Localization
  32. Fermi GRB 240603C: Global MASTER-Net observations report
  33. GRB 240603A: Fermi GBM Final Localization
  34. GRB 240603C: BALROG localization (Fermi Trigger 739102156 / GRB 240603423)
  35. GRB 240603C: Fermi GBM Final Real-time Localization
  36. Fermi GRB 240602A: Global MASTER-Net observations report
  37. GRB 240602A: Fermi GBM Final Real-time Localization
  38. GRB 240527B: Swift-XRT afterglow detection
  39. GRB 240527B: Fermi GBM Observation
  40. Fermi GRB 240527A: Global MASTER-Net observations report
  41. GRB 240527B: Fermi-LAT detection
  42. Fermi GRB 240527B: Global MASTER-Net observations report
  43. GRB 240527B: Fermi GBM Final Localization
  44. GRB 240527B: BALROG localization (Fermi Trigger 738511436 / GRB 240527586)
  45. GRB 240527A: Fermi GBM Final Real-time Localization
  46. Fermi trigger No 738348224: Global MASTER-Net observations report
  47. Fermi trigger No 738330463: Global MASTER-Net observations report
  48. GRB 240521B: Fermi GBM Observation
  49. Fermi GBM Sub-Threshold Detection of GRB 240516B
  50. GRB 240513A: Swift-XRT afterglow detection
  51. GRB 240521B: Swift/BAT-GUANO arcminute localization of a long burst
  52. Fermi trigger No 737996942: Global MASTER-Net observations report
  53. GRB 240516B: AstroSat CZTI detection
  54. GRB 240514B: VZLUSAT-2 detection
  55. GRB 240504A: VZLUSAT-2 detection
  56. GRB 240502A: VZLUSAT-2 detection
  57. GRB 240519A: GRBAlpha detection
  58. GRB 240519A: AstroSat CZTI detection
  59. Fermi trigger No 737788024: Global MASTER-Net observations report
  60. GRB 240519A: BALROG localization (Fermi Trigger 737788024 / GRB 240519213)
  61. Fermi GRB 240517A: Global MASTER-Net observations report
  62. GRB 240516A ATCA radio observations
  63. IPN triangulation of GRB 240514B (short)
  64. GRB 240513A: Swift ToO observations
  65. GRB 240517A: Fermi GBM Final Real-time Localization
  66. Konus-Wind detection of GRB 240513A
  67. GRB 240516A: AstroSat CZTI detection
  68. Fermi trigger No 737559855: Global MASTER-Net observations report
  69. GRB 240516A: Fermi GBM Observation
  70. GRB 240502C: Zeiss-1000 at Koshka observations of GOTO24bao optical counterpart candidate
  71. GRB 240516A: GOTO optical upper limit
  72. Fermi trigger No 737523389: Global MASTER-Net observations report
  73. GRB 240514B: AT2024ixa/GOTO24bph is not consistent with the Fermi localisation
  74. Fermi trigger No 737476171: Global MASTER-Net observations report
  75. GRB 240514B: GOTO candidate optical counterpart
  76. Fermi Gamma-ray Burst Monitor list of triggers that are not a GRB
  77. GRB 240514B: GRBAlpha detection
  78. GRB 240514B: Fermi GBM Detection
  79. GRB 240513A: Fermi GBM observation
  80. GRB 240513A: Swift-XRT observations
  81. GRB 240514C: Fermi GBM Final Real-time Localization
  82. Fermi GRB 240514B: Global MASTER-Net observations report
  83. Fermi Gamma-ray Burst Monitor triggers 737345659/240514093 and GRB240514A are not GRBs
  84. GRB 240514B: Fermi GBM Final Real-time Localization
  85. GRB 240514A: Fermi GBM Final Real-time Localization
  86. GRB 240513A: Tiled Swift observations
  87. GRB 240513A: Fermi-LAT detection
  88. GRB 240511A: Fermi GBM Observation
  89. Fermi GRB 240513B: Global MASTER-Net observations report
  90. Fermi trigger No 737277727: Global MASTER-Net observations report
  91. GRB 240513B: Fermi GBM Final Real-time Localization
  92. GRB 240513A: AstroSat CZTI detection
  93. Fermi trigger No 737258655: Global MASTER-Net observations report
  94. GRB 240511A: J-band observations with WINTER
  95. Fermi trigger No 737247400: Global MASTER-Net observations report
  96. Fermi trigger No 737244199: Global MASTER-Net observations report
  97. Fermi trigger No 737218721: Global MASTER-Net observations report
  98. Fermi trigger No 737196587: Global MASTER-Net observations report
  99. Fermi trigger No 737168073: Global MASTER-Net observations report
  100. GRB 240511A : MITSuME Akeno optical upper limits

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