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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"

11632 results found.

  1. GRB 170522A: confirmation of the X-ray afterglow
  2. IPN Triangulation of GRB 170527A
  3. GRB 170511A: AstroSat CZTI detection
  4. GRB 170511A: Fermi GBM observation
  5. GRB 170527A: Fermi GBM detection
  6. GRB 170511A CALET Gamma-Ray Burst Monitor detection
  7. IPN Triangulation of GRB 170522A
  8. GRB 170511A: MAXI/GSC detection
  9. GRB 170522A: LCO McDonald observations
  10. GRB 170522A: Swift-XRT observations
  11. GRB 170522A: Global MASTER-Net job
  12. Konus-Wind observation of GRB 170522A
  13. GRB 170522A: Tiled Swift observations
  14. GRB 170522A: Fermi-LAT detection
  15. GRB 170522A: Fermi GBM detection
  16. GRB 170514A CALET Gamma-Ray Burst Monitor detection
  17. GRB 170510A: LCO Siding Springs early observations
  18. GRB 170510A: Swift-XRT afterglow detection
  19. AXP CXOU J164710.2-455216: Fermi GBM observation
  20. GRB 170514A: Fermi GBM detection
  21. Fermi GBM trigger 516459580/170514541 is not a GRB
  22. Konus-Wind observation of GRB 170510A
  23. GRB 170510A: Swift-XRT observations
  24. GRB 170510A: Fermi GBM observation
  25. GRB 170510A: Tiled Swift observations
  26. GRB 170510A: Fermi-LAT detection
  27. GRB 170423A: TAROT Reunion observatory optical observations
  28. Swift XRT observations of GRB 170424A
  29. LIGO/VIRGO G284239: Fermi GBM Upper Limits
  30. LIGO/Virgo G284239: Fermi-LAT search for a high-energy gamma-ray counterpart
  31. Konus-Wind observation of GRB 170424A
  32. GRB 170424A: Tiled Swift observations
  33. GRB 170424A: Fermi GBM detection
  34. GRB 170424A: Fermi-LAT detection
  35. GRB 170423A: Fermi GBM detection
  36. Fermi GBM trigger 514436208/170421123 is not a GRB
  37. Fermi GBM trigger 514379207/170420463 is not a GRB
  38. GRB 170412A CALET Gamma-Ray Burst Monitor detection
  39. GRB 170419B: Fermi GBM observation
  40. GRB 170409A: TAROT Reunion observatory optical observations
  41. Konus-Wind observation of GRB 170409A
  42. GRB 170409A: Fermi GBM Observation
  43. GRB 170409A: Fermi-LAT detection
  44. GRB 170403B CALET Gamma-Ray Burst Monitor detection
  45. Konus-Wind observation of GRB 170405A
  46. GRB 170405A: Fermi-LAT detection
  47. GRB 170405A: Fermi GBM observation
  48. GRB 170402A CALET Gamma-Ray Burst Monitor detection
  49. GRB 170325A: optical observations, possible OT/host detection
  50. Konus-Wind observation of GRB 170403A (short/hard)
  51. IPN Triangulation of GRB 170403A (short)
  52. GRB 170403A: Fermi GBM observation
  53. Fermi-LAT Gamma-ray Observations of IceCube-170321
  54. GRB 170325A: 15 GHz upper limits from AMI
  55. Konus-Wind observation of GRB 170329A
  56. GRB 170329A: AstroSat CZTI detection
  57. Fermi trigger 512347439/GRB 170327A: MASTER-SAAO possible OT detection
  58. GRB 170329A: Fermi GBM detection
  59. GRB 170329A: Fermi-LAT detection
  60. GRB 170325A: Fermi GBM observation
  61. GRB 170325A, Swift-BAT detection of a short GRB
  62. LIGO/Virgo G277583: Fermi GBM Observations
  63. Fermi GBM Observation of IceCube-170321A
  64. Fermi GBM trigger 511851891/170322212 is not a GRB
  65. GRB 170318B: Fermi GBM observation
  66. GRB 170315A: POLAR observation
  67. GRB 170307A: 15 GHz upper limit from AMI
  68. LIGO/Virgo G275697: Fermi-LAT search for a high-energy gamma-ray counterpart
  69. Fermi GBM trigger 510642159/170308210 is not a GRB
  70. GRB 170306B: POLAR observation
  71. GRB 170307A (trigger 741528): Swift-BAT refined analysis
  72. GRB 170305A: POLAR observation
  73. GRB 170307A: Fermi GBM observation
  74. Konus-Wind observation of GRB 170306B
  75. GRB 170306B: Swift-XRT observations
  76. GRB 170306B: Fermi GBM detection
  77. GRB 170306B: Fermi-LAT detection
  78. GRB 170306B: Tiled Swift observations
  79. IPN Triangulation of GRB 170305A (short)
  80. GRB170305A: Fermi GBM detection
  81. GRB 170304A: Fermi GBM observation
  82. Konus-Wind observation of GRB 170228A
  83. Fermi GBM trigger 510207699/170303182 is not a GRB
  84. GRB 170228B CALET Gamma-Ray Burst Monitor detection
  85. LIGO/Virgo G275697: Fermi GBM Upper Limits
  86. GRB 170228B: POLAR Observation
  87. LIGO/Virgo G275404: Fermi GBM Upper Limits
  88. GRB 170228A: AstroSat CZTI detection
  89. GRB 170228A: Fermi GBM observation
  90. GRB 170228A: Fermi-LAT detection
  91. LIGO/Virgo G275697: Fermi-LAT search for a high-energy gamma-ray counterpart
  92. LIGO/VIRGO G275697: Fermi GBM Observations
  93. LIGO/Virgo G275404: Fermi-LAT search for a high-energy gamma-ray counterpart
  94. LIGO/Virgo G275404: Fermi GBM Observations
  95. Konus-Wind observation of GRB 170222A
  96. GRB 170222A: Swift-XRT observations
  97. GRB 170222A: Fermi GBM observation
  98. IPN Triangulation of GRB 170222A (short/hard)
  99. GRB 170219A: POLAR Observation
  100. LIGO/Virgo G274296: Fermi-LAT search for a high-energy gamma-ray counterpart

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