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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"

19666 results found.

  1. GRB 160912A: Fermi GBM detection
  2. GRB 160912A: Enhanced Swift-XRT position
  3. GRB 160912A: Swift detection of a burst
  4. GRB 160910A: Correction to GCN 19904
  5. GRB 160910A: XRT results and corrections to GCN 19905 & 19906
  6. GRB 160910A: Tiled Swift observations
  7. GRB 160910A: Swift-XRT afterglow detection
  8. GRB 160910A: Fermi-LAT detection
  9. Konus-Wind observation of GRB 160905A
  10. GRB 160824A: 15 GHz upper limits from AMI
  11. GRB 160905A: Swift/UVOT Detection
  12. GRB 160905A: Swift-BAT refined analysis
  13. Swift Trigger 711158 is not an astrophysical event
  14. GRB 160905A: Swift-XRT refined Analysis
  15. GRB 160821A: 15 GHz upper limits from AMI
  16. GRB 160905A: Enhanced Swift-XRT position
  17. GRB 160905A: Fermi-LAT detection
  18. GRB 160905A: Fermi GBM observation
  19. GRB 160905A: Swift detection of a burst with an optical counterpart
  20. GRB 160829A: Swift-XRT observations
  21. GRB 160829A: Swift ToO observations
  22. GRB 160829A: Fermi-LAT detection of a short GRB
  23. GRB 160827A: Swift-BAT refined analysis
  24. Swift trigger 710022 is not astrophysical
  25. GRB 160827A: Swift detection of a burst
  26. Correction to Circular 19874 (on Swift trigger 71022)
  27. Swift Trigger 710022 is very likely noise
  28. GRB 160826A: Swift-BAT refined analysis
  29. GRB 160826A: Swift/UVOT Upper Limits
  30. GRB 160825A: not localized by Swift
  31. GRB 160826A: Swift-XRT refined Analysis
  32. GRB 160826A: Swift detection of a burst
  33. GRB 160821A: CALET Gamma-Ray Burst Monitor detection
  34. GRB 160825A: Swift ToO observations
  35. GRB 160824A: 1.5m OSN I-band observation
  36. GRB 160824A: Swift-BAT refined analysis
  37. GRB 160824A: Swift/UVOT Possible Afterglow Detection
  38. GRB 160824A: Bassano Bresciano Observatory upper limits
  39. GRB 160824A: Swift-XRT refined Analysis
  40. GRB 160824A: Enhanced Swift-XRT position
  41. GRB 160824A: Swift detection of a burst
  42. IPN Triangulation of GRB 160822A (short/hard)
  43. IPN Triangulation of GRB 160820A (short/hard)
  44. GRB 160821B: GTC follow-up observation
  45. GRB 160821B: Swift-BAT refined analysis
  46. GRB 160821B: Fermi GBM Detection
  47. Konus-Wind observation of GRB 160821A
  48. GRB 160821B: Swift-XRT refined Analysis
  49. GRB 160821A: Swift-BAT refined analysis
  50. GRB 160821B: Swift/UVOT Upper Limits
  51. Short GRB 160821B: MASTER early optical observations
  52. GRB 160821B: Enhanced Swift-XRT position
  53. GRB 160821A: Fermi-LAT refined analysis
  54. GRB 160821A: Fermi GBM Detection
  55. GRB 160821B: Swift detection of a short burst
  56. GRB 160821A: TAROT Calern observatory optical detection
  57. GRB 160821A: Fermi-LAT detection of a bright burst
  58. GRB 160821A: Swift detection of a bright burst
  59. BAT detection and localization of GRB 160819A
  60. GRB 160816A: MASTER OT early detection on coaded images
  61. GRB 160816A: Swift/UVOT Detection
  62. GRB 160816A: IPN annulus
  63. GRB 160804A: 15 GHz detections and upper limit from AMI
  64. GRB 160801A: 15 GHz upper limits from AMI
  65. GRB 160714A: 15 GHz upper limits from AMI
  66. GRB 160816A: RATIR Optical and NIR Observations
  67. GRB 160816A: LCOGT-FTN optical candidate
  68. GRB 160816A: Swift-XRT afterglow detection
  69. GRB 160816A: Swift ToO observations
  70. GRB 160816A: Fermi-LAT detection
  71. GRB 160815A: Swift/UVOT Detection
  72. GRB 160815A: Swift-BAT refined analysis
  73. GRB 160815A: Swift-XRT refined Analysis
  74. GRB 160815A: Fermi GBM detection/observation
  75. GRB 160815A: Enhanced Swift-XRT position
  76. GRB 160815A: Swift/UVOT Afterglow Detection
  77. GRB 160815A: Swift detection of a burst
  78. IPN Triangulation of GRB 160806A
  79. Swift Trigger 707517 is not an astrophysical event
  80. Swift Trigger 707545 is likely 4U 1850-03/GS1843-02
  81. Swift Trigger 707517 is probably not a GRB
  82. GRB 160804A: RATIR Optical and NIR Observations
  83. GRB 160804A: GROND observations
  84. GRB 160804A: Fermi GBM observation
  85. GRB160804A: MASTER-SAAO observation
  86. GRB 160804A: Swift-BAT refined analysis
  87. GRB 160804A: Swift/UVOT Detection
  88. GRB 160804A: Swift-XRT refined Analysis
  89. GRB 160804A: Enhanced Swift-XRT position
  90. GRB 160804A: Swift detection of a burst
  91. GRB 160801A: Swift/UVOT Upper Limits
  92. FACT follow-up of IceCube20160731
  93. GRB 160801A: Swift-XRT refined Analysis
  94. GRB 160801A: Swift-BAT refined analysis
  95. Global MASTER net follow up of IceCube-160731A
  96. Swift follow up of IceCube-160731A
  97. GRB 160801A: Enhanced Swift-XRT position
  98. GRB 160801A: Swift detection of a burst
  99. GRB 160716A: TAROT La Silla observatory optical observations
  100. GRB160709A: Astrosat CZTI detection of short GRB

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