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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"

6829 results found.

  1. GRB 160409A found in Swift BAT ground analysis
  2. GRB 160412A: Swift-XRT refined Analysis
  3. GRB 160411A: Fermi GBM detection
  4. GRB 160411A: Swift-XRT refined Analysis
  5. GRB 160410A: Swift-XRT refined Analysis
  6. GRB 160408A: TLS Tautenburg observations
  7. GRB 160408A: Swift-XRT refined Analysis
  8. GRB 160408A: Fermi GBM detection
  9. GRB 160406A: Fermi GBM observation
  10. GRB 160401A: Swift-XRT observations
  11. GRB 160327A: Swift-XRT refined Analysis
  12. GRB 160325A: Swift-XRT refined Analysis
  13. GRB 160325A: Fermi-LAT detection
  14. GRB 160325A: Fermi GBM detection
  15. GRB 160321A: Swift-XRT refined Analysis
  16. GRB 160310A: A further Swift-XRT observation, no afterglow detected
  17. GRB 160314B: Fermi GBM observation
  18. GRB 160314B: Fermi-LAT detection
  19. GRB 160314A: Swift-XRT refined Analysis
  20. GRB 160313A: MASTER-Net optical observations
  21. GRB 160313A: Swift-XRT refined Analysis
  22. GRB 160310A: Swift-XRT observations
  23. GRB 160310A: Fermi GBM observation
  24. GRB 160310A: Fermi-LAT detection
  25. LIGO/Virgo G211117: HAWC follow-up of northern sky
  26. GRB 160303A: Swift-XRT refined Analysis
  27. Swift possibly triggered on IGR17091-3624
  28. GRB 160228A: Swift-XRT refined Analysis
  29. GRB 160227B: Fermi GBM detection
  30. GRB 160227A: Swift-XRT refined Analysis
  31. GRB 160225B: Fermi GBM detection
  32. GRB 160225A: Swift-XRT refined Analysis
  33. GRB 160225A: WHT LIRIS observations
  34. GRB 160223A: Swift-XRT afterglow detection
  35. GRB 160221A: Swift-XRT afterglow detection
  36. GRB 160223A: Fermi GBM observation
  37. GRB 160223B: Swift-XRT observations
  38. GRB 160223B: Fermi GBM observation
  39. GRB 160221A: Fermi GBM observation
  40. GRB 160221A: Swift-XRT observations
  41. GRB 160219A: Fermi GBM detection
  42. GRB 160220A: nIR observations at AAT
  43. GRB 160220A: Swift-XRT refined Analysis
  44. GRB160220B: Swift/UVOT observations
  45. GRB 160220B: Swift-XRT refined Analysis
  46. GRB160220A: Swift/UVOT observations
  47. GRB 160220A: Fermi GBM observation
  48. GRB 160216A: Swift-XRT refined Analysis
  49. GRB160131A: detection of polarisation by Astrosat CZTI
  50. GRB 160206B: Fermi GBM detection
  51. GRB 160131A: TSHAO optical observations
  52. GRB 160206A: Swift/UVOT observations
  53. GRB 160206A: Swift-XRT observations
  54. GRB 160131A: TSHAO optical observations
  55. GRB 160203A: TSHAO optical observations
  56. GRB 160203A: Swift-XRT refined Analysis
  57. Konus-Wind observation of GRB 160131A
  58. GRB 160131A: Swift-XRT refined Analysis
  59. GRB 160131A: iTelescope optical observations
  60. GRB 160127A: Swift-XRT refined Analysis
  61. GRB 160123A: Swift-XRT refined Analysis
  62. GRB 160121A: Swift-XRT refined Analysis
  63. GRB 160117A: Swift-XRT afterglow detection
  64. GRB 160119A: Swift-XRT refined Analysis
  65. GRB 160117B: Early iTelescope observation
  66. GRB 160117A: Swift/UVOT Upper Limits
  67. GRB 160117A: Swift-XRT observations
  68. GRB 160117B: iTelescope T17 optical observations
  69. GRB 160117B: NOT optical afterglow observations
  70. GRB 160117B: Swift-XRT refined Analysis
  71. GRB 160106A: CALET Gamma-Ray Burst Monitor detection
  72. LIGO/Virgo G211117: Further Swift-XRT sources
  73. GRB 160113A: Swift-XRT observations
  74. GRB 160113A: Fermi GBM detection
  75. LIGO/Virgo G211117: Swift observations of PS15dpn
  76. GRB 160107A: Fermi GBM observation
  77. LIGO/Virgo G211117: VISTA imaging
  78. LIGO/Virgo G211117: Further Swift-XRT sources
  79. GRB 160104A: Swift-XRT refined Analysis
  80. GRB 160104A: Fermi GBM observation
  81. GRB 160104A: MITSuME Okayama Ks-band upper-limit
  82. LIGO/Virgo G211117: Fermi/LAT observations
  83. GRB 160102A: Swift-XRT observations
  84. GRB 160101B: Fermi-LAT detection
  85. GRB 160101B: Fermi GBM detection
  86. GRB 160101A: Swift/UVOT Detection
  87. GRB 160101A: Fermi GBM observation
  88. GRB 160101A: Swift-XRT afterglow detection
  89. GRB 151231B: Fermi GBM observation
  90. GRB 151231A: Fermi GBM observation
  91. GRB 151228A: Correction to GCN 18770
  92. LIGO/Virgo G211117: SkyMapper observations and transient candidate
  93. GRB 151228A: Swift-XRT refined Analysis
  94. GRB 151229A Swift-BAT Spectral lag analysis
  95. GRB 151229A: Swift-XRT refined Analysis
  96. GRB 151229A: Fermi GBM observation
  97. GRB 151228B: Fermi GBM observation
  98. GRB 151228B: Swift-XRT refined Analysis
  99. LIGO/Virgo G211117: Further Swift-XRT sources
  100. GRB 151228A: Fermi GBM observation

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
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