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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"

43896 results found.

  1. GRB 160925A / Fermi 496473540: Global MASTER Net OT discovery
  2. GRB 160910A: 15 GHz detection from AMI
  3. GRB 160917A: Mondy afterglow confirmation
  4. GRB 160910A: TSHAO optical observations
  5. GRB 160917A: Swift-BAT refined analysis
  6. GRB 160917A: RATIR Optical and NIR Observations
  7. GRB 160917A: Fermi GBM observation
  8. GRB 160917A: Swift/UVOT Detection
  9. GRB 160917A: Swift-XRT refined Analysis
  10. GRB 160917A: Mondy optical observations
  11. GRB 160917A: OSN I-band upper limits
  12. GRB 160917A: Enhanced Swift-XRT position
  13. GRB 160917A: Swift detection of a burst
  14. GRB 160910A: Maidanak optical observations
  15. GRB 160912A, Swift-BAT refined analysis
  16. GRB 160910A: Swift/UVOT Detection
  17. GRB 160912A: RATIR Optical and NIR Observations
  18. GRB 160912A: Swift/UVOT Weak Afterglow Detection
  19. GRB 160912A: Mondy optical observations
  20. GRB 160910A: Mondy optical observations
  21. GRB 160912A Liverpool Telescope optical afterglow
  22. GRB 160912A: Swift-XRT refined Analysis
  23. GRB 160912A: Fermi GBM detection
  24. GRB 160912A: Enhanced Swift-XRT position
  25. GRB 160910A: Global MASTER Net OT detection before LAT alert
  26. Konus-Wind observation of GRB 160910A
  27. GRB 160912A: Swift detection of a burst
  28. GRB 160910A: Correction to GCN 19904
  29. GRB 160910A: CALET Gamma-Ray Burst Monitor detection
  30. GRB 160910A: NOT afterglow confirmation
  31. GRB 160910A: Afterglow detection from OSN
  32. GRB 160910A: Tiled Swift observations
  33. GRB 160910A: Swift-XRT afterglow detection
  34. GRB 160908A: CALET Gamma-Ray Burst Monitor detection
  35. GRB 160910A: Fermi-LAT detection
  36. GRB 160910A: Fermi GBM observation
  37. Konus-Wind observation of GRB 160905A
  38. GRB 160824A: 15 GHz upper limits from AMI
  39. GRB 160821B: 15 GHz upper limits from AMI
  40. GRB 160905A: Swift/UVOT Detection
  41. GRB 160905A: Swift-BAT refined analysis
  42. Swift Trigger 711158 is not an astrophysical event
  43. GRB 160905A: Swift-XRT refined Analysis
  44. GRB 160821A: 15 GHz upper limits from AMI
  45. GRB 160816A: Possible radio afterglow detection at 15 GHz with AMI
  46. GRB 160905A: Enhanced Swift-XRT position
  47. GRB 160905A: Fermi-LAT detection
  48. GRB 160905A: Fermi GBM observation
  49. IceCube HESE 160814: MASTER OT J130845.02-323254.9 as the possible source of the high energy neutrino
  50. GRB 160905A: Swift detection of a burst with an optical counterpart
  51. Fermi GBM trigger 494508549 / 160902479 is not a GRB
  52. Search for counterpart to IceCube-160814A with ANTARES
  53. GRB 160824B: Lomonosov BDRG gamma ray detection and MASTER limit
  54. GRB 160829A: Swift-XRT observations
  55. GRB 160829A: Fermi GBM Detection
  56. GRB 160816A, the review of the sky area in plate archives
  57. GRB 160829A: Swift ToO observations
  58. GRB 160829A: Fermi-LAT detection of a short GRB
  59. GRB 160827A: Swift-BAT refined analysis
  60. Swift trigger 710022 is not astrophysical
  61. GRB 160827A: Swift detection of a burst
  62. Correction to Circular 19874 (on Swift trigger 71022)
  63. Swift Trigger 710022 is very likely noise
  64. GRB 160824B: CALET Gamma-Ray Burst Monitor detection
  65. GRB 160826A: Swift-BAT refined analysis
  66. GRB 160825A: not localized by Swift
  67. GRB 160820A: Fermi GBM observation
  68. GRB 160826A: Swift-XRT refined Analysis
  69. GRB160821A: Astrosat CZTI (veto) detection
  70. GRB 160826A: Swift detection of a burst
  71. GRB 160821A: CALET Gamma-Ray Burst Monitor detection
  72. GRB 160825A: Swift ToO observations
  73. GRB 160824A: 1.5m OSN I-band observation
  74. GRB 160824A: ISON/Terskol optical observations
  75. GRB 160824A: Swift-BAT refined analysis
  76. GRB 160824A: Swift/UVOT Possible Afterglow Detection
  77. GRB 160824A: Bassano Bresciano Observatory upper limits
  78. GRB 160824A: Swift-XRT refined Analysis
  79. GRB 160824A: Enhanced Swift-XRT position
  80. GRB 160824B: Fermi GBM detection
  81. GRB 160824A: Swift detection of a burst
  82. GRB 160821B: VLA 5.0 GHz observations
  83. Konus-Wind observation of GRB 160822A
  84. IPN Triangulation of GRB 160822A (short/hard)
  85. Konus-Wind observation of GRB 160820A
  86. IPN Triangulation of GRB 160820A (short/hard)
  87. Possible radio detection of GRB160703A with the GMRT
  88. Possible radio detection of GRB160623A with the GMRT
  89. GRB 160821B: GTC follow-up observation
  90. GRB 160821B: WHT afterglow confirmation and redshift of candidate host
  91. GRB 160822672: Fermi GBM detection
  92. GRB 160821B: Swift-BAT refined analysis
  93. GRB 160821B: Fermi GBM Detection
  94. Konus-Wind observation of GRB 160821A
  95. GRB 160821B: Swift-XRT refined Analysis
  96. GRB 160821A: Swift-BAT refined analysis
  97. GRB 160821B: Swift/UVOT Upper Limits
  98. Short GRB 160821B: MASTER early optical observations
  99. GRB 160821B: Enhanced Swift-XRT position
  100. GRB 160821A: Fermi-LAT refined analysis

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