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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"

37788 results found.

  1. IceCube-190619A: not observable by Fermi-GBM
  2. Fermi GBM trigger 190619235/582615488 likely not a GRB
  3. IceCube-190619A - IceCube observation of a high-energy neutrino candidate event
  4. Fermi trigger No 582646590 Global MASTER-Net observations report
  5. GRB 190619B: BALROG localization (Fermi Trigger 582646590 / GRB 190619595)
  6. GRB 190619B: Fermi GBM Final Real-time Localization
  7. GRB 190613A: SEDM Observations
  8. Fermi trigger No 582596766 Global MASTER-Net observations report
  9. GRB 190613B: JCMT SCUBA-2 sub-mm observations
  10. GRB 190619A: Fermi GBM Final Real-time Localization
  11. GRB 190613B: AstroSat CZTI detection
  12. GRB 190611B: AstroSat CZTI detection
  13. Konus-Wind observation of GRB 190613B
  14. GRB 190615B: Insight-HXMT/HE detection
  15. GRB 190615A: Insight-HXMT/HE detection
  16. GRB 190613B: Kitab observatory optical upper limit
  17. Fermi trigger No 582304592 Global MASTER-Net observations report
  18. GRB 190615A: Fermi GBM Final Real-time Localization
  19. GRB 190613A: Kitab and AbAO optical upper limit
  20. Fermi trigger No 582159815 Global MASTER-Net observations report
  21. GRB 190613B: SEDM Observations
  22. GRB 190613A: SEDM Observations
  23. GRB 190610A: Swift/UVOT Upper Limits
  24. GRB 190610A: Swift-XRT observations
  25. GRB 190613B: Optical observation from Asiago Schmidt
  26. GRB 190613B: GROND Detection of the Optical/NIR Afterglow
  27. GRB 190611B: CALET Gamma-Ray Burst Monitor detection
  28. GRB 190613B: Insight-HXMT/HE detection
  29. Konus-Wind observation of short/hard GRB 190610A
  30. Konus-Wind observation of GRB 190611B
  31. GRB 190613B: BOOTES-5/JGT early optical observations
  32. GRB 190613B: Optical observations from NOT
  33. Fermi trigger No 582115625 Global MASTER-Net observations report
  34. GRB 190613B: Swift-XRT refined Analysis
  35. GRB 190613A: FRAM-ORM afterglow detection
  36. GRB 190610A: Swift ToO observations
  37. GRB 190613B: Swift-BAT refined analysis
  38. GRB 190613A, Swift-BAT refined analysis
  39. GRB 190613B: KAIT Optical Afterglow Confirmation
  40. GRB 190613B: Swift/UVOT Detection
  41. GRB 190613A: Fermi GBM detection
  42. GRB 190613A: Swift/UVOT Detection
  43. GRB 190613B: Fermi GBM observation
  44. GRB 190611B: BALROG localization (Fermi Trigger 581986074 / GRB 190611950)
  45. GRB 190613B: Enhanced Swift-XRT position
  46. IPN Triangulation of GRB 190611B
  47. GRB 190613A: Swift-XRT refined Analysis
  48. GRB 190613A: Enhanced Swift-XRT position
  49. GRB 190613B: BALROG localization (Fermi Trigger 582115625 / GRB 190613449)
  50. GRB 190613B: Swift detection of a burst with an optical counterpart
  51. GRB 190613B: Fermi GBM Final Real-time Localization
  52. GRB 190610A: CALET Gamma-Ray Burst Monitor detection
  53. GRB 190609A: AstroSat CZTI detection
  54. GRB 190613A: MASTER OT detection
  55. GRB 190613A: KAIT Optical Afterglow Confirmation
  56. GRB 190613A: BALROG localization (Fermi Trigger 582091643 / GRB 190613172)
  57. GRB 190613A: Fermi GBM Final Real-time Localization
  58. GRB 190613A: Swift detection of a burst with an optical counterpart
  59. Fermi trigger No 582091643 Global MASTER-Net observations report
  60. Fermi trigger No 582012834 Global MASTER-Net observations report
  61. Fermi trigger No 581986074 Global MASTER-Net observations report
  62. GRB 190611B: Fermi GBM detection
  63. GRB 190611A: Swift-XRT refined Analysis
  64. GRB 190611A: Swift/UVOT Upper Limits
  65. GRB 190611A: Optical observations from VLT/FORS2
  66. GRB 190611A, Swift-BAT refined analysis
  67. GRB 190610B: AstroSat CZTI detection
  68. Fermi trigger No 582004649 Global MASTER-Net observations report
  69. GRB 190612A: Fermi GBM Final Real-time Localization
  70. GRB 190611A: Enhanced Swift-XRT position
  71. GRB 190611A: Swift detection of a burst
  72. Konus-Wind observation of GRB 190606A
  73. GRB 190610A: Swift-BAT refined analysis
  74. GRB 190610A: Insight-HXMT/HE detection
  75. Fermi trigger No 581889628 Global MASTER-Net observations report
  76. GRB 190610C: Fermi GBM Final Real-time Localization
  77. Fermi trigger No 581882394 Global MASTER-Net observations report
  78. GRB190610B: BALROG localization (Fermi Trigger 581882394 / GRB 190610750)
  79. GRB 190610B: Fermi GBM Final Real-time Localization
  80. Fermi trigger No 581841498 Global MASTER-Net observations report
  81. GRB 190610A: Swift detection of a short burst
  82. GRB190609A: BALROG localization (Fermi Trigger 581758450 / GRB 190609315)
  83. GRB 190609A: Fermi GBM Final Real-time Localization
  84. Fermi trigger No 581719018 Global MASTER-Net observations report
  85. GRB 190605A: AstroSat CZTI detection
  86. Fermi trigger No 581645543 Global MASTER-Net observations report
  87. GRB 190608A: Fermi GBM Final Real-time Localization
  88. GRB 190606A: Insight-HXMT/HE detection
  89. GRB 190114C: East Asia VLBI Network observations
  90. IPN Triangulation of GRB 190606A (short)
  91. GRB 190606A: Fermi GBM detection
  92. GRB 190530A: Further OAJ/OSN photometry and analysis
  93. GRB 190604B: VLT Afterglow Detection
  94. GRB 190606A: Fermi-LAT detection
  95. GRB 190605B: Insight-HXMT/HE detection
  96. Fermi trigger No 581478912 / GRB 190606A: AGILE/MCAL observations
  97. GRB 190604A: Insight-HXMT/HE detection
  98. Fermi trigger No 581478912 Global MASTER-Net observations report
  99. Fermi trigger No 581469752 Global MASTER-Net observations report
  100. GRB 190605A: Fermi GBM Final Real-time Localization

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