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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"

15271 results found.

  1. GRB 161023A: Watcher optical observations
  2. GRB 161023A: Swift ToO observations
  3. GRB 161023A: A long GRB detected by INTEGRAL
  4. GRB 161022A: Fermi GBM observation
  5. Konus-Wind observation of GRB 161020B
  6. GRB 161020A: A long GRB detected by INTEGRAL
  7. GRB 161015A: further Swift-XRT follow-up observations
  8. Konus-Wind observation of GRB 161017A
  9. GRB 161017A: TNG spectroscopy and redshift confirmation
  10. GRB 161017A: GTC additional spectroscopy and refined redshift
  11. GRB 161017A: Lomonosov Gamma Ray and MASTER Optical prompt observations
  12. GRB 161017A: Fermi GBM observation
  13. GRB 161014A: Continued RATIR Optical and NIR Observations
  14. Konus-Wind observation of GRB 161015A
  15. GRB 161014A: VLT/X-shooter redshift confirmation
  16. GRB161015A: AstroSat CZTI detection
  17. Konus-Wind observation of GRB 161014A
  18. GRB 161015A: Fermi GBM detection
  19. GRB 161015A: Tiled Swift observations
  20. GRB 161015A: Fermi-LAT detection
  21. GRB161004A: Further analysis of the burst nature
  22. GRB 161014A: RATIR Optical and NIR Observations
  23. GRB 161014A: Fermi GBM observation
  24. GRB 161014A: Swift/UVOT Detection
  25. GRB 161011A: RATIR Optical and NIR Observations
  26. GRB 161014A: Swift-XRT and UVOT afterglow detection
  27. GRB 161014A: Kanata optical observation
  28. GRB 161014A : Xinglong TNT optical observation
  29. Konus-Wind observation of GRB 161010A
  30. GRB 161010A: Swift ToO observations
  31. GRB 161010A: a long GRB detected by INTEGRAL
  32. GRB 161007A: NOT optical observations
  33. Konus-Wind observation of GRB 161004B
  34. GRB 160927A: GTC observations
  35. GRB 161004B: Fermi GBM detection
  36. GRB161004B: AstroSat CZTI detection
  37. GRB 160917B: Lomonosov BDRG gamma ray discovery
  38. GRB 160917A: Lomonosov BDRG gamma ray detection
  39. GRB 160915A: Lomonosov BDRG gamma ray detection
  40. GRB 161004A: SAO RAS optical upper limit
  41. Konus-Wind observation of GRB 161001A (short/hard ?)
  42. GRB 161001A: GROND afterglow candidate
  43. GRB 161001A: Fermi GBM detection
  44. GRB 160927A: NOT optical observations
  45. GRB 160927A: GROND Observations
  46. GRB 160927A: TNG optical afterglow confirmation
  47. GRB 160927A: RTT150 optical afterglow candidate
  48. GRB160910A: AstroSat CZTI detection
  49. GRB160824B: AstroSat CZTI detection
  50. GRB160917A: AstroSat CZTI detection
  51. GRB 160925A: Swift ToO observations
  52. GRB 160917A: Mondy afterglow confirmation
  53. GRB 160917A: Fermi GBM observation
  54. GRB 160912A: RATIR Optical and NIR Observations
  55. GRB 160912A: Fermi GBM detection
  56. Konus-Wind observation of GRB 160910A
  57. GRB 160910A: Correction to GCN 19904
  58. GRB 160910A: XRT results and corrections to GCN 19905 & 19906
  59. GRB 160910A: NOT afterglow confirmation
  60. GRB 160910A: Tiled Swift observations
  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: Fermi-LAT detection
  66. GRB 160905A: Fermi GBM observation
  67. IceCube HESE 160814: MASTER OT J130845.02-323254.9 as the possible source of the high energy neutrino
  68. Search for counterpart to IceCube-160814A with ANTARES
  69. GRB 160824B: Lomonosov BDRG gamma ray detection and MASTER limit
  70. GRB 160829A: Fermi GBM Detection
  71. GRB 160829A: Swift ToO observations
  72. GRB 160829A: Fermi-LAT detection of a short GRB
  73. GRB 160825A: not localized by Swift
  74. GRB160821A: Astrosat CZTI (veto) detection
  75. GRB 160825A: Swift ToO observations
  76. GRB 160824A: ISON/Terskol optical observations
  77. GRB 160824B: Fermi GBM detection
  78. Konus-Wind observation of GRB 160822A
  79. Konus-Wind observation of GRB 160820A
  80. GRB 160821B: GTC follow-up observation
  81. GRB 160822672: Fermi GBM detection
  82. GRB 160821B: Fermi GBM Detection
  83. Konus-Wind observation of GRB 160821A
  84. GRB 160821A: Fermi-LAT refined analysis
  85. GRB 160821B: NOT optical afterglow candidate
  86. GRB 160821A: Fermi-LAT detection of a bright burst
  87. INTEGRAL/SPI-ACS observation of IceCube HESE 128340 58537957
  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: RATIR Optical and NIR Afterglow Confirmation
  92. GRB 160816A: Swift/UVOT Detection
  93. Konus-Wind observation of GRB 160816A
  94. GRB 160816A: RATIR Optical and NIR Observations
  95. GRB 160816730A: Fermi GBM detection/observation
  96. GRB 160816A: Swift ToO observations
  97. GRB 160816A: Fermi-LAT detection
  98. Konus-Wind observation of GRB 160814A
  99. GRB 160815A: Fermi GBM detection/observation
  100. Fermi GBM trigger 160812507/492696620 is not a GRB

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