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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"

11610 results found.

  1. Fermi GBM trigger 501779084/161125628 is not a GRB
  2. GRB 161119A: MASTER-SAAO possible OT detection during Fermi Alert
  3. Konus-Wind observation of GRB 161117A
  4. GRB 161117A: Fermi GBM detection/observation
  5. GRB 161109A: Swift/UVOT Upper Limits
  6. GRB 161109A: Swift-XRT observations
  7. GRB 161109A: Tiled Swift observations
  8. GRB 161109A: Fermi GBM observation
  9. GRB 161109A: Fermi-LAT detection
  10. GRB 161106A: Lomonosov BDRG gamma ray discovery
  11. Fermi LAT Gamma-ray Observations of IceCube-161103
  12. GRB 161106A: Fermi GBM detection
  13. Fermi GBM Observations of IceCube-161103
  14. GRB 160928A: The first GRB detected by POLAR
  15. GRB 161020A: Fermi GBM observation
  16. Fermi GBM trigger 499467682/161029876 is not a GRB
  17. GRB 161015A: 15 GHz upper limits from AMI
  18. GRB 161022A: Fermi GBM observation
  19. IPN Triangulation of GRB 161020B
  20. GRB 161020A: A long GRB detected by INTEGRAL
  21. GRB 161015A: further Swift-XRT follow-up observations
  22. Konus-Wind observation of GRB 161017A
  23. GRB 161017A: GTC additional spectroscopy and refined redshift
  24. GRB 161017A: Fermi GBM observation
  25. GRB 161015A: Swift/UVOT observations
  26. Konus-Wind observation of GRB 161015A
  27. GRB161015A: AstroSat CZTI detection
  28. Konus-Wind observation of GRB 161014A
  29. GRB 161015A: Swift-XRT observations
  30. GRB 161015A: Fermi GBM detection
  31. GRB 161015A: Tiled Swift observations
  32. GRB 161015A: Fermi-LAT detection
  33. GRB 161014A: Fermi GBM observation
  34. GRB 161014A: Swift detection of a burst
  35. GRB 160925A: Kottamia R-band observation
  36. Konus-Wind observation of GRB 161004B
  37. GRB 161004B: Fermi GBM detection
  38. GRB 160917B: Lomonosov BDRG gamma ray discovery
  39. Konus-Wind observation of GRB 161001A (short/hard ?)
  40. GRB 161001A: Fermi GBM detection
  41. Fermi GBM trigger 496791348/160928900 is not a GRB
  42. GRB160910A: AstroSat CZTI detection
  43. XRT refined analysis for GRB 160925A
  44. GRB 160925A/MASTER optical transient: Mondy optical observations
  45. GRB 160925A: Bassano Bresciano Photometry of MASTER optical transient
  46. GRB 160925A: Optical spectroscopy of MASTER optical transient
  47. GRB160824B: AstroSat CZTI detection
  48. GRB 160925A / Fermi 496473540: MASTER OT observations
  49. GRB 160925A: Swift ToO observations
  50. GRB160925A / Fermi 496473540: MASTER optical transient confirmation by LCOGT-FTN
  51. GRB 160925A / Fermi 496473540: Global MASTER Net OT discovery
  52. GRB 160910A: 15 GHz detection from AMI
  53. GRB 160917A: Fermi GBM observation
  54. GRB 160910A: Swift/UVOT Detection
  55. GRB 160912A: Fermi GBM detection
  56. GRB 160910A: Global MASTER Net OT detection before LAT alert
  57. Konus-Wind observation of GRB 160910A
  58. GRB 160910A: NOT afterglow confirmation
  59. GRB 160910A: Tiled Swift observations
  60. GRB 160910A: Swift-XRT afterglow detection
  61. GRB 160908A: CALET Gamma-Ray Burst Monitor detection
  62. GRB 160910A: Fermi-LAT detection
  63. GRB 160910A: Fermi GBM observation
  64. Konus-Wind observation of GRB 160905A
  65. GRB 160905A: Swift/UVOT Detection
  66. GRB 160816A: Possible radio afterglow detection at 15 GHz with AMI
  67. GRB 160905A: Fermi-LAT detection
  68. GRB 160905A: Fermi GBM observation
  69. Fermi GBM trigger 494508549 / 160902479 is not a GRB
  70. GRB 160824B: Lomonosov BDRG gamma ray detection and MASTER limit
  71. GRB 160829A: Swift-XRT observations
  72. GRB 160829A: Fermi GBM Detection
  73. GRB 160829A: Swift ToO observations
  74. GRB 160829A: Fermi-LAT detection of a short GRB
  75. GRB 160820A: Fermi GBM observation
  76. GRB160821A: Astrosat CZTI (veto) detection
  77. GRB 160824B: Fermi GBM detection
  78. Konus-Wind observation of GRB 160822A
  79. IPN Triangulation of GRB 160822A (short/hard)
  80. IPN Triangulation of GRB 160820A (short/hard)
  81. GRB 160821B: GTC follow-up observation
  82. GRB 160822672: Fermi GBM detection
  83. GRB 160821B: Fermi GBM Detection
  84. Konus-Wind observation of GRB 160821A
  85. GRB 160821A: Fermi-LAT refined analysis
  86. GRB 160821A: Fermi GBM Detection
  87. GRB 160821A: Fermi-LAT detection of a bright burst
  88. BAT detection and localization of GRB 160819A
  89. GRB 160819A: Fermi GBM detection
  90. GRB 160816A: Further RATIR Optical and NIR Observations
  91. GRB 160816A: MASTER OT early detection on coaded images
  92. GRB 160816A: RATIR Optical and NIR Afterglow Confirmation
  93. GRB 160816A iTelescope observation
  94. Fermi GBM Observations of IceCube-160806A
  95. GRB 160816A: Swift/UVOT Detection
  96. GRB 160816A: IPN annulus
  97. Konus-Wind observation of GRB 160816A
  98. GRB 160816A: RATIR Optical and NIR Observations
  99. GRB 160816A: LCOGT-FTN optical candidate
  100. GRB 160816A: Swift-XRT afterglow detection

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