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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"

43885 results found.

  1. GRB 160917A: Enhanced Swift-XRT position
  2. GRB 160917A: Swift detection of a burst
  3. GRB 160910A: Maidanak optical observations
  4. GRB 160912A, Swift-BAT refined analysis
  5. GRB 160910A: Swift/UVOT Detection
  6. GRB 160912A: RATIR Optical and NIR Observations
  7. GRB 160912A: Swift/UVOT Weak Afterglow Detection
  8. GRB 160912A: Mondy optical observations
  9. GRB 160910A: Mondy optical observations
  10. GRB 160912A Liverpool Telescope optical afterglow
  11. GRB 160912A: Swift-XRT refined Analysis
  12. GRB 160912A: Fermi GBM detection
  13. GRB 160912A: Enhanced Swift-XRT position
  14. GRB 160910A: Global MASTER Net OT detection before LAT alert
  15. Konus-Wind observation of GRB 160910A
  16. GRB 160912A: Swift detection of a burst
  17. GRB 160910A: Correction to GCN 19904
  18. GRB 160910A: CALET Gamma-Ray Burst Monitor detection
  19. GRB 160910A: NOT afterglow confirmation
  20. GRB 160910A: Afterglow detection from OSN
  21. GRB 160910A: Tiled Swift observations
  22. GRB 160910A: Swift-XRT afterglow detection
  23. GRB 160908A: CALET Gamma-Ray Burst Monitor detection
  24. GRB 160910A: Fermi-LAT detection
  25. GRB 160910A: Fermi GBM observation
  26. Konus-Wind observation of GRB 160905A
  27. GRB 160824A: 15 GHz upper limits from AMI
  28. GRB 160821B: 15 GHz upper limits from AMI
  29. GRB 160905A: Swift/UVOT Detection
  30. GRB 160905A: Swift-BAT refined analysis
  31. Swift Trigger 711158 is not an astrophysical event
  32. GRB 160905A: Swift-XRT refined Analysis
  33. GRB 160821A: 15 GHz upper limits from AMI
  34. GRB 160816A: Possible radio afterglow detection at 15 GHz with AMI
  35. GRB 160905A: Enhanced Swift-XRT position
  36. GRB 160905A: Fermi-LAT detection
  37. GRB 160905A: Fermi GBM observation
  38. IceCube HESE 160814: MASTER OT J130845.02-323254.9 as the possible source of the high energy neutrino
  39. GRB 160905A: Swift detection of a burst with an optical counterpart
  40. Fermi GBM trigger 494508549 / 160902479 is not a GRB
  41. Search for counterpart to IceCube-160814A with ANTARES
  42. GRB 160824B: Lomonosov BDRG gamma ray detection and MASTER limit
  43. GRB 160829A: Swift-XRT observations
  44. GRB 160829A: Fermi GBM Detection
  45. GRB 160816A, the review of the sky area in plate archives
  46. GRB 160829A: Swift ToO observations
  47. GRB 160829A: Fermi-LAT detection of a short GRB
  48. GRB 160827A: Swift-BAT refined analysis
  49. Swift trigger 710022 is not astrophysical
  50. GRB 160827A: Swift detection of a burst
  51. Correction to Circular 19874 (on Swift trigger 71022)
  52. Swift Trigger 710022 is very likely noise
  53. GRB 160824B: CALET Gamma-Ray Burst Monitor detection
  54. GRB 160826A: Swift-BAT refined analysis
  55. GRB 160825A: not localized by Swift
  56. GRB 160820A: Fermi GBM observation
  57. GRB 160826A: Swift-XRT refined Analysis
  58. GRB160821A: Astrosat CZTI (veto) detection
  59. GRB 160826A: Swift detection of a burst
  60. GRB 160821A: CALET Gamma-Ray Burst Monitor detection
  61. GRB 160825A: Swift ToO observations
  62. GRB 160824A: 1.5m OSN I-band observation
  63. GRB 160824A: ISON/Terskol optical observations
  64. GRB 160824A: Swift-BAT refined analysis
  65. GRB 160824A: Swift/UVOT Possible Afterglow Detection
  66. GRB 160824A: Bassano Bresciano Observatory upper limits
  67. GRB 160824A: Swift-XRT refined Analysis
  68. GRB 160824A: Enhanced Swift-XRT position
  69. GRB 160824B: Fermi GBM detection
  70. GRB 160824A: Swift detection of a burst
  71. GRB 160821B: VLA 5.0 GHz observations
  72. Konus-Wind observation of GRB 160822A
  73. IPN Triangulation of GRB 160822A (short/hard)
  74. Konus-Wind observation of GRB 160820A
  75. IPN Triangulation of GRB 160820A (short/hard)
  76. Possible radio detection of GRB160703A with the GMRT
  77. Possible radio detection of GRB160623A with the GMRT
  78. GRB 160821B: GTC follow-up observation
  79. GRB 160821B: WHT afterglow confirmation and redshift of candidate host
  80. GRB 160822672: Fermi GBM detection
  81. GRB 160821B: Swift-BAT refined analysis
  82. GRB 160821B: Fermi GBM Detection
  83. Konus-Wind observation of GRB 160821A
  84. GRB 160821B: Swift-XRT refined Analysis
  85. GRB 160821A: Swift-BAT refined analysis
  86. GRB 160821B: Swift/UVOT Upper Limits
  87. Short GRB 160821B: MASTER early optical observations
  88. GRB 160821B: Enhanced Swift-XRT position
  89. GRB 160821A: Fermi-LAT refined analysis
  90. GRB 160821A: Fermi GBM Detection
  91. GRB 160821B: NOT optical afterglow candidate
  92. GRB 160821B: Swift detection of a short burst
  93. GRB 160821A: TAROT Calern observatory optical detection
  94. GRB 160821A: Fermi-LAT detection of a bright burst
  95. GRB 160821A: Swift detection of a bright burst
  96. GRB 160816A: TSHAO optical observations
  97. INTEGRAL/SPI-ACS observation of IceCube HESE 128340 58537957
  98. BAT detection and localization of GRB 160819A
  99. GRB 160819A: Fermi GBM detection
  100. GRB 160816A: ISON/UAFO optical observations

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