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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"

6837 results found.

  1. LIGO/Virgo G297595: INTEGRAL search for a prompt gamma-ray counterpart
  2. GRB 170813A: Swift-XRT refined Analysis
  3. GRB 170728B: 15 GHz upper limits from AMI
  4. GRB 170810A: Swift-XRT refined Analysis
  5. GRB 170810A: Fermi GBM observation
  6. GRB 170810A: Fermi-LAT detection
  7. LIGO/Virgo G296853: Fermi-LAT search for high-energy gamma-ray counterpart
  8. GRB 170808B: Fermi LAT Detection
  9. GRB 170808B: Fermi GBM observation
  10. GRB 170728B: TShAO, SAO RAS and AbAO optical observations
  11. GRB 170804A: Swift-XRT refined Analysis
  12. GRB 170803A: Swift/UVOT Detection
  13. Swift Trigger 766161 is not a GRB
  14. GRB 170803A: Swift-XRT refined Analysis
  15. GRB 170803A: Fermi GBM observation
  16. GRB 170802A: Fermi GBM detection
  17. GRB 170714A: Chandra observations
  18. GRB 170728B: Fermi GBM detection
  19. GRB 170728B: I-band detection from 1.5m OSN
  20. GRB 170728B: Fermi-LAT detection
  21. GRB 170728A: Swift-XRT refined Analysis
  22. GRB 170728B: Swift-XRT refined Analysis
  23. GRB 170728B: TNG optical afterglow candidate
  24. LIGO/Virgo G275697: LOFAR follow-up
  25. GRB 170714A: Bastille Day Burst: ULGRB or RTDE?
  26. GRB 170714A: Swift-XRT refined Analysis
  27. GRB 170711A: Swift-XRT refined Analysis
  28. GRB 170711A: Fermi GBM observation
  29. GRB 170710B: Fermi GBM observation
  30. GRB 170710B: Swift-XRT and UVOT observations
  31. GRB 170710A: Swift-XRT refined Analysis
  32. LIGO/Virgo G288732: Konus-Wind observations
  33. Konus-Wind observation of GRB 170705A
  34. GRB 170705A: Fermi GBM observation
  35. GRB 170705A: Swift-BAT refined analysis
  36. GRB 170705A: Swift-XRT refined Analysis
  37. GRB 170629A: Swift-XRT refined Analysis
  38. GRB 170629A: Fermi GBM observation
  39. GRB 170626A: SAO RAS confirmation of OT fading
  40. GRB 170626A: Swift-XRT refined Analysis
  41. GRB 170626A: Fermi GBM observation
  42. LIGO/Virgo G288732: Fermi GBM Upper Limits for the LIGO Trigger and LAT Candidate
  43. LIGO/Virgo G288732: Kiso/KWFC optical imaging of the possible Fermi/LAT counterpart
  44. GRB 170607B: Fermi GBM detection
  45. LIGO/Virgo G288732: Swift/UVOT follow up of the possible LAT counterpart
  46. LIGO/Virgo G288732: Swift-XRT follow up of the putative LAT counterpart
  47. LIGO/Virgo G288732: INTEGRAL search for a prompt gamma-ray counterpart
  48. LIGO/Virgo G288732: Fermi-LAT detection of a weak candidate
  49. GRB 170607A: Fermi GBM observation
  50. GRB 170607A: Swift-XRT refined Analysis
  51. Swift trigger 755873: Swift BAT and XRT refined analysis
  52. GRB 170522A: confirmation of the X-ray afterglow
  53. GRB 170604A: Swift-XRT refined Analysis
  54. GRB 170604A: optical observations
  55. GRB 170531B: Swift-XRT refined Analysis
  56. GRB 170531A: Swift-XRT refined Analysis
  57. GRB 170524B: Swift-UVOT/XRT Confirmation of Afterglow
  58. GRB 170511A: Fermi GBM observation
  59. LIGO/Virgo G268556: BSA radio observations at 110 MHz
  60. LIGO/Virgo G268556/GW170104: Konus-Wind observations
  61. GRB 170527A: Fermi GBM detection
  62. GRB 170526A: Swift-XRT refined Analysis
  63. GRB 170524B: Swift-XRT observations
  64. GRB 170524A: Swift-XRT refined Analysis
  65. GRB 170522A: Swift-XRT observations
  66. GRB 170522A: Fermi-LAT detection
  67. GRB 170522A: Fermi GBM detection
  68. GRB 170519A: KAIT Optical Observations
  69. GRB 170519A: Swift-XRT refined Analysis
  70. GRB 170519A: optical observations
  71. GRB 170510A: Swift-XRT afterglow detection
  72. GRB 170516A: Swift-XRT refined Analysis
  73. GRB 170514A: Fermi GBM detection
  74. LIGO/Virgo G284239: Konus-Wind observations
  75. GRB 170510A: Swift-XRT observations
  76. GRB 170510A: Fermi GBM observation
  77. GRB 170510A: Fermi-LAT detection
  78. LIGO/Virgo G284239: AstroSat CZTI upper limits
  79. Swift XRT observations of GRB 170424A
  80. LIGO/VIRGO G284239: Fermi GBM Upper Limits
  81. LIGO/Virgo G284239: Fermi-LAT search for a high-energy gamma-ray counterpart
  82. LIGO/Virgo G284239: INTEGRAL search for a prompt gamma-ray counterpart
  83. LIGO/Virgo G284239: Identification of a GW Burst Candidate
  84. GRB 170428A: Swift-XRT refined Analysis
  85. Swift Trigger 750044 is probably a noise fluctuation
  86. GRB 170424A: Fermi GBM detection
  87. GRB 170424A: Fermi-LAT detection
  88. GRB 170423A: Fermi GBM detection
  89. GRB 170419A: Swift-XRT refined Analysis
  90. GRB 170419B: Fermi GBM observation
  91. Swift trigger 748858: Swift BAT, XRT, and UVOT refined analysis
  92. GRB 170409A: Fermi GBM Observation
  93. GRB 170409A: Fermi-LAT detection
  94. GRB 170317A: SAO RAS optical observations
  95. GRB 170405A: Swift-XRT refined Analysis
  96. Trigger 745966: Swift detection of 4U1850-03
  97. GRB 170405A: Fermi-LAT detection
  98. GRB 170405A: Fermi GBM observation
  99. GRB 170403A: Fermi GBM observation
  100. IceCube-170321A: Konus-Wind upper limits

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