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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"

15360 results found.

  1. GRB 161017A: Fermi GBM observation
  2. GRB 161014A: Continued RATIR Optical and NIR Observations
  3. Konus-Wind observation of GRB 161015A
  4. GRB 161014A: VLT/X-shooter redshift confirmation
  5. GRB161015A: AstroSat CZTI detection
  6. Konus-Wind observation of GRB 161014A
  7. GRB 161015A: Fermi GBM detection
  8. GRB 161015A: Tiled Swift observations
  9. GRB 161015A: Fermi-LAT detection
  10. GRB161004A: Further analysis of the burst nature
  11. GRB 161014A: RATIR Optical and NIR Observations
  12. GRB 161014A: Fermi GBM observation
  13. GRB 161014A: Swift/UVOT Detection
  14. GRB 161011A: RATIR Optical and NIR Observations
  15. GRB 161014A: Swift-XRT and UVOT afterglow detection
  16. GRB 161014A: Kanata optical observation
  17. GRB 161014A : Xinglong TNT optical observation
  18. Konus-Wind observation of GRB 161010A
  19. GRB 161010A: Swift ToO observations
  20. GRB 161010A: a long GRB detected by INTEGRAL
  21. GRB 161007A: NOT optical observations
  22. Konus-Wind observation of GRB 161004B
  23. GRB 160927A: GTC observations
  24. GRB 161004B: Fermi GBM detection
  25. GRB161004B: AstroSat CZTI detection
  26. GRB 160917B: Lomonosov BDRG gamma ray discovery
  27. GRB 160917A: Lomonosov BDRG gamma ray detection
  28. GRB 160915A: Lomonosov BDRG gamma ray detection
  29. GRB 161004A: SAO RAS optical upper limit
  30. Konus-Wind observation of GRB 161001A (short/hard ?)
  31. GRB 161001A: GROND afterglow candidate
  32. GRB 161001A: Fermi GBM detection
  33. GRB 160927A: NOT optical observations
  34. GRB 160927A: GROND Observations
  35. GRB 160927A: TNG optical afterglow confirmation
  36. GRB 160927A: RTT150 optical afterglow candidate
  37. GRB160910A: AstroSat CZTI detection
  38. GRB160824B: AstroSat CZTI detection
  39. GRB160917A: AstroSat CZTI detection
  40. GRB 160925A: Swift ToO observations
  41. GRB 160917A: Mondy afterglow confirmation
  42. GRB 160917A: Fermi GBM observation
  43. GRB 160912A: RATIR Optical and NIR Observations
  44. GRB 160912A: Fermi GBM detection
  45. Konus-Wind observation of GRB 160910A
  46. GRB 160910A: Correction to GCN 19904
  47. GRB 160910A: XRT results and corrections to GCN 19905 & 19906
  48. GRB 160910A: NOT afterglow confirmation
  49. GRB 160910A: Tiled Swift observations
  50. GRB 160908A: CALET Gamma-Ray Burst Monitor detection
  51. GRB 160910A: Fermi-LAT detection
  52. GRB 160910A: Fermi GBM observation
  53. Konus-Wind observation of GRB 160905A
  54. GRB 160905A: Fermi-LAT detection
  55. GRB 160905A: Fermi GBM observation
  56. IceCube HESE 160814: MASTER OT J130845.02-323254.9 as the possible source of the high energy neutrino
  57. Search for counterpart to IceCube-160814A with ANTARES
  58. GRB 160824B: Lomonosov BDRG gamma ray detection and MASTER limit
  59. GRB 160829A: Fermi GBM Detection
  60. GRB 160829A: Swift ToO observations
  61. GRB 160829A: Fermi-LAT detection of a short GRB
  62. GRB 160825A: not localized by Swift
  63. GRB160821A: Astrosat CZTI (veto) detection
  64. GRB 160825A: Swift ToO observations
  65. GRB 160824A: ISON/Terskol optical observations
  66. GRB 160824B: Fermi GBM detection
  67. Konus-Wind observation of GRB 160822A
  68. Konus-Wind observation of GRB 160820A
  69. GRB 160821B: GTC follow-up observation
  70. GRB 160822672: Fermi GBM detection
  71. GRB 160821B: Fermi GBM Detection
  72. Konus-Wind observation of GRB 160821A
  73. GRB 160821A: Fermi-LAT refined analysis
  74. GRB 160821B: NOT optical afterglow candidate
  75. GRB 160821A: Fermi-LAT detection of a bright burst
  76. INTEGRAL/SPI-ACS observation of IceCube HESE 128340 58537957
  77. BAT detection and localization of GRB 160819A
  78. GRB 160819A: Fermi GBM detection
  79. GRB 160816A: Further RATIR Optical and NIR Observations
  80. GRB 160816A: RATIR Optical and NIR Afterglow Confirmation
  81. GRB 160816A: Swift/UVOT Detection
  82. Konus-Wind observation of GRB 160816A
  83. GRB 160816A: RATIR Optical and NIR Observations
  84. GRB 160816730A: Fermi GBM detection/observation
  85. GRB 160816A: Swift ToO observations
  86. GRB 160816A: Fermi-LAT detection
  87. Konus-Wind observation of GRB 160814A
  88. GRB 160815A: Fermi GBM detection/observation
  89. Fermi GBM trigger 160812507/492696620 is not a GRB
  90. INTEGRAL/SPI-ACS and IBIS_VETO search for prompt gamma-ray counterpart of IceCube-160806A
  91. Fermi GBM trigger 160810523/492525192 is not a GRB
  92. IceCube 160806A EHE Neutrino Candidate Event
  93. GRB 160806A: Fermi GBM observation
  94. Konus-Wind observation of GRB 160806A
  95. GRB160802A - Astrosat CZTI detection
  96. Swift Trigger 707545 is likely 4U 1850-03/GS1843-02
  97. GRB 160804A: TSHAO optical observations
  98. GRB 160804A: ISON/UAFO optical observations
  99. GRB 160804A: GROND observations
  100. Search for counterpart to IceCube-160731A with ANTARES

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