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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"

11630 results found.

  1. GRB 161212A: POLAR Detection
  2. GRB 161218B: POLAR observation
  3. GRB 161218A: POLAR observation
  4. GRB 161218B: Fermi GBM detection
  5. GRB 161207A: POLAR observation
  6. GRB 161213A: POLAR Observation
  7. GRB 161207B: POLAR observation
  8. GRB 161205A: POLAR observation
  9. GRB 161210A: POLAR observation
  10. Fermi-LAT Gamma-ray Observations of IceCube-161210
  11. GRB 161207A: CALET Gamma-Ray Burst Monitor detection
  12. GRB 161206A: Fermi GBM detection
  13. Konus-Wind observation of GRB 161202A
  14. MASTER: Optical Blazar Flare Detection during Fermi trigger 502272781 inspection
  15. GRB 161129A: POLAR Detection
  16. GRB 161202A: Fermi-LAT detection
  17. Fermi GBM trigger 502258294/161201175 is not a GRB
  18. Fermi Gamma-ray Burst Monitor trigger 161130183 is not a GRB
  19. GRB 161129A: Fermi GBM Detection
  20. Fermi GBM trigger 501785179/161125699 is not a GRB
  21. Fermi GBM trigger 501779084/161125628 is not a GRB
  22. GRB 161119A: MASTER-SAAO possible OT detection during Fermi Alert
  23. Konus-Wind observation of GRB 161117A
  24. GRB 161117A: Fermi GBM detection/observation
  25. GRB 161109A: Swift/UVOT Upper Limits
  26. GRB 161109A: Swift-XRT observations
  27. GRB 161109A: Tiled Swift observations
  28. GRB 161109A: Fermi GBM observation
  29. GRB 161109A: Fermi-LAT detection
  30. GRB 161106A: Lomonosov BDRG gamma ray discovery
  31. Fermi LAT Gamma-ray Observations of IceCube-161103
  32. GRB 161106A: Fermi GBM detection
  33. Fermi GBM Observations of IceCube-161103
  34. GRB 160928A: The first GRB detected by POLAR
  35. GRB 161020A: Fermi GBM observation
  36. Fermi GBM trigger 499467682/161029876 is not a GRB
  37. GRB 161015A: 15 GHz upper limits from AMI
  38. GRB 161022A: Fermi GBM observation
  39. IPN Triangulation of GRB 161020B
  40. GRB 161020A: A long GRB detected by INTEGRAL
  41. GRB 161015A: further Swift-XRT follow-up observations
  42. Konus-Wind observation of GRB 161017A
  43. GRB 161017A: GTC additional spectroscopy and refined redshift
  44. GRB 161017A: Fermi GBM observation
  45. GRB 161015A: Swift/UVOT observations
  46. Konus-Wind observation of GRB 161015A
  47. GRB161015A: AstroSat CZTI detection
  48. Konus-Wind observation of GRB 161014A
  49. GRB 161015A: Swift-XRT observations
  50. GRB 161015A: Fermi GBM detection
  51. GRB 161015A: Tiled Swift observations
  52. GRB 161015A: Fermi-LAT detection
  53. GRB 161014A: Fermi GBM observation
  54. GRB 161014A: Swift detection of a burst
  55. GRB 160925A: Kottamia R-band observation
  56. Konus-Wind observation of GRB 161004B
  57. GRB 161004B: Fermi GBM detection
  58. GRB 160917B: Lomonosov BDRG gamma ray discovery
  59. Konus-Wind observation of GRB 161001A (short/hard ?)
  60. GRB 161001A: Fermi GBM detection
  61. Fermi GBM trigger 496791348/160928900 is not a GRB
  62. GRB160910A: AstroSat CZTI detection
  63. XRT refined analysis for GRB 160925A
  64. GRB 160925A/MASTER optical transient: Mondy optical observations
  65. GRB 160925A: Bassano Bresciano Photometry of MASTER optical transient
  66. GRB 160925A: Optical spectroscopy of MASTER optical transient
  67. GRB160824B: AstroSat CZTI detection
  68. GRB 160925A / Fermi 496473540: MASTER OT observations
  69. GRB 160925A: Swift ToO observations
  70. GRB160925A / Fermi 496473540: MASTER optical transient confirmation by LCOGT-FTN
  71. GRB 160925A / Fermi 496473540: Global MASTER Net OT discovery
  72. GRB 160910A: 15 GHz detection from AMI
  73. GRB 160917A: Fermi GBM observation
  74. GRB 160910A: Swift/UVOT Detection
  75. GRB 160912A: Fermi GBM detection
  76. GRB 160910A: Global MASTER Net OT detection before LAT alert
  77. Konus-Wind observation of GRB 160910A
  78. GRB 160910A: NOT afterglow confirmation
  79. GRB 160910A: Tiled Swift observations
  80. GRB 160910A: Swift-XRT afterglow detection
  81. GRB 160908A: CALET Gamma-Ray Burst Monitor detection
  82. GRB 160910A: Fermi-LAT detection
  83. GRB 160910A: Fermi GBM observation
  84. Konus-Wind observation of GRB 160905A
  85. GRB 160905A: Swift/UVOT Detection
  86. GRB 160816A: Possible radio afterglow detection at 15 GHz with AMI
  87. GRB 160905A: Fermi-LAT detection
  88. GRB 160905A: Fermi GBM observation
  89. Fermi GBM trigger 494508549 / 160902479 is not a GRB
  90. GRB 160824B: Lomonosov BDRG gamma ray detection and MASTER limit
  91. GRB 160829A: Swift-XRT observations
  92. GRB 160829A: Fermi GBM Detection
  93. GRB 160829A: Swift ToO observations
  94. GRB 160829A: Fermi-LAT detection of a short GRB
  95. GRB 160820A: Fermi GBM observation
  96. GRB160821A: Astrosat CZTI (veto) detection
  97. GRB 160824B: Fermi GBM detection
  98. Konus-Wind observation of GRB 160822A
  99. IPN Triangulation of GRB 160822A (short/hard)
  100. IPN Triangulation of GRB 160820A (short/hard)

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