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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"

24588 results found.

  1. Fermi-LAT gamma-ray observations of IceCube-220822A and detection of a new gamma-ray source, Fermi J1810.1+2154
  2. Fermi trigger No 682918137: Global MASTER-Net observations report
  3. GRB 220823A: Swift/BAT-GUANO detection of a short burst
  4. IceCube-220822A - IceCube observation of a high-energy neutrino candidate track-like event
  5. IceCube Alert 220822.85: Global MASTER-Net observations report
  6. GRB 220821A: Fermi GBM Final Real-time Localization
  7. Konus-Wind detection of GRB 220813A
  8. GRB 220813A: Swift-XRT refined Analysis
  9. Swift GRB 220813A: Global MASTER-Net observations report
  10. GRB 220719B: Detection by VZLUSAT-2
  11. Fermi trigger No 681998863: Global MASTER-Net observations report
  12. GRB 220810A: MeerLICHT detection of two afterglow candidates
  13. Fermi trigger No 681890304: Global MASTER-Net observations report
  14. Fermi GRB 220810A: Global MASTER-Net observations report
  15. GRB 220810A: Fermi GBM Final Real-time Localization
  16. GRB 220806A: Swift-BAT refined analysis
  17. Fermi trigger No 681719116: Global MASTER-Net observations report
  18. Fermi trigger No 681633544: Global MASTER-Net observations report
  19. IceCube Astrotrack Bronze 136918_45252263.amon is likely background
  20. IceCube Alert 220808.33: Global MASTER-Net observations report
  21. GRB 220806A: Swift detection of a burst
  22. Swift GRB220806.76: Global MASTER-Net observations report
  23. GRB 220804A: Fermi GBM Final Localization
  24. Fermi trigger No 681271717: Global MASTER-Net observations report
  25. Fermi trigger No 681212354: Global MASTER-Net observations report
  26. GRB 220730A: Swift-BAT refined analysis
  27. GRB 220730A: Fermi GBM detection
  28. GRB 220730A: Swift-XRT observations
  29. Swift GRB 220730A: Global MASTER-Net observations report
  30. Fermi trigger No 680782656: Global MASTER-Net observations report
  31. Fermi GRB 220728A: Global MASTER-Net observations report
  32. AMON Coincidence Alert from the sub-threshold IceCube-HAWC search NuEm-220728A
  33. GRB 220728A: Fermi GBM Final Real-time Localization
  34. GRB 220726A: Fermi GBM Final Real-time Localization
  35. Fermi trigger No 680421061: Global MASTER-Net observations report
  36. Fermi GRB 220724A: Global MASTER-Net observations report
  37. GRB 220724A: Fermi GBM Final Real-time Localization
  38. Fermi GRB 220721A: Global MASTER-Net observations report
  39. GRB 220721A: Fermi GBM Final Real-time Localization
  40. GRB 220715A: CALET Gamma-Ray Burst Monitor detection
  41. GRB 220711B: CALET Gamma-Ray Burst Monitor detection
  42. GRB 220719A: Fermi GBM Final Real-time Localization
  43. GRB 220715B: Swift-BAT refined analysis
  44. GRB220714B: UVOT detections
  45. GRB 220715B: Fermi GBM detection
  46. Swift GRB 220715B: Global MASTER-Net observations report
  47. GRB 220715B: Swift detection of a burst
  48. GRB 220715B: Fermi GBM Final Real-time Localization
  49. GRB 220714B: Swift-BAT refined analysis
  50. GRB 220714B: Fermi GBM observation
  51. GRB 220715A: AGILE/MCAL detection
  52. GRB 220714B: LCO Optical Observations
  53. GRB 220715A: Fermi GBM Final Real-time Localization
  54. GRB 220714B: Swift-XRT refined Analysis
  55. Swift/BAT Trigger 1116172 (=GRB 220714A) is not a real astrophysical event
  56. GRB 220713A: Fermi GBM Final Localization
  57. GRB 220714B: Swift detection of a burst
  58. GRB 220714B: Fermi GBM Final Real-time Localization
  59. GRB 220711C: Fermi GBM Observation
  60. GRB 220711B: 10.4 m GTC(+EMIR) observations
  61. GRB 220711B: 10.4 m GTC(+EMIR) observations
  62. GRB 220710A: Swift-XRT afterglow detection
  63. GRB 220711C: Swift/BAT-GUANO detection outside the coded FOV
  64. Konus-Wind detection of GRB 220711C
  65. GRB 220711B: NUTTelA-TAO / BSTI Early Optical Limits (Preliminary)
  66. Fermi trigger No 679248723: Global MASTER-Net observations report
  67. Fermi GRB 220711B: Global MASTER-Net observations report
  68. GRB 220712B: NOT optical afterglow confirmation
  69. GRB 220710A: Swift/BAT-GUANO arcminute localization
  70. GRB 220711B: Swift-BAT refined analysis
  71. IPN triangulation of GRB 220711C (short)
  72. GRB 220711B: Swift-XRT refined Analysis
  73. GRB 220711B: Fermi GBM Detection
  74. GRB 220711B: LCO Optical Upper Limits
  75. GRB 220711B: Fermi GBM Final Real-time Localization
  76. GRB 220711A: Fermi GBM Final Real-time Localization
  77. GRB 220708A: Swift-BAT refined analysis
  78. GRB 220708B: T193-OHP optical upper limit
  79. Konus-Wind detection of GRB 220708B (Correction to GCN 32358)
  80. Konus-Wind detection of GRB 220708B
  81. GRB 220708B: CALET Gamma-Ray Burst Monitor detection
  82. GRB 220706A: Swift-BAT refined analysis
  83. GRB 220708B: Swift/BAT-GUANO arcminute localization
  84. GRB 220708A: Swift detection of a burst
  85. GRB 220706A: LCO Optical Upper Limits
  86. GRB 220706A: Swift-XRT refined Analysis
  87. GRB 220706A: MAXI/GSC detection 84 minutes after the Swift Trigger
  88. MAXI GRB220706.73: Global MASTER-Net observations report
  89. Swift GRB 220706A: Global MASTER-Net observations report
  90. GRB 220701A: Swift-BAT refined analysis
  91. GRB 220702B: Fermi GBM Final Localization
  92. GRB 220702A: Fermi GBM Final Localization
  93. GRB 220705A: Fermi GBM Final Localization
  94. Fermi trigger No 678635286: Global MASTER-Net observations report
  95. GRB 220701A: MITSuME Akeno optical upper limits
  96. Alert from the HAWC Burst Monitor HAWC-220702A
  97. GRB 220701A: LCO Optical Upper Limits
  98. IceCube-220629A: Upper limits from a search for additional neutrino events in IceCube
  99. GRB 200701A: KAIT Optical Upper Limit
  100. GRB 220701A: Swift detection of a burst

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