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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"

12412 results found.

  1. Fermi GBM trigger 463339482/150907725 is too weak to be classified
  2. Fermi GBM trigger 150907763 is not a GRB
  3. GRB 150906A: Fermi GBM detection
  4. GRB 150902A: Swift-XRT afterglow detection
  5. ANTARES neutrino detection: ANU 2.3m and Kepler K2 Observations of the Swift x-ray source
  6. ANTARES neutrino detection: CAHA photometry & spectroscopy of the Swift source
  7. ANTARES neutrino Alert150901.32 alert and Swift XRT counterpart: MASTER optical observations and new possible candidate
  8. ANTARES neutrino detection and Swift/XRT counterpart: GMG observation
  9. GRB 150902A: Swift-XRT observations
  10. ANTARES neutrino detection: Optical/NIR spectroscopy of the Swift/XRT counterpart candidate from NOT
  11. GRB 150902A: MASTER-SAAO optical observations
  12. Konus-Wind observation of GRB 150902A
  13. ANTARES neutrino detection and possible Swift X-ray counterpart
  14. GRB 150902A: Swift ToO observations
  15. GRB 150902A: Fermi GBM detection
  16. GRB 150902A: Fermi-LAT detection
  17. GRB 150831B: MASTER-IAC early optical observations
  18. GRB 150831B: Fermi GBM detection
  19. Fermi GBM trigger 150829183 is not a GRB
  20. Fermi GBM trigger 150828520 is not a GRB
  21. Fermi GBM trigger 150827524 is not a GRB
  22. Fermi GBM trigger 150826536 is not a GRB
  23. Konus-Wind observation of GRB 150824A
  24. IPN Triangulation of GRB 150824A
  25. GRB 150824A: Fermi GBM detection
  26. Konus-Wind observation of GRB 150821A
  27. GRB 150821A: Fermi GBM detection
  28. Konus-Wind observation of GRB 150819B
  29. GRB 150819B: Fermi GBM detection
  30. IPN Triangulation of GRB 150819B (short / very intense)
  31. MASTER OT inside bright ESO240-010 galaxy detection during FERMI trigger GRB150816.83 inspection
  32. GRB 150817A: Fermi GBM observation
  33. Fermi GBM Trigger 150815694 is not a GRB
  34. GBM Trigger 150813665 is not a GRB
  35. Konus-Wind observation of GRB 150811B
  36. IPN Triangulation of GRB 150811B
  37. GRB 150811B: Fermi GBM detection
  38. GRB 150810A: Fermi GBM detection
  39. Fermi GBM GRB Trigger 460608875: iPTF P48 Observations
  40. Fermi GBM trigger 150807969 is not a GRB
  41. Fermi GBM trigger 150806450 is not a GRB
  42. Fermi GBM trigger 150805556 is not a GRB
  43. Fermi GBM triggers 150730606 150731173 and 150801590 are not due to GRBs
  44. Fermi GBM GRB Trigger 458852670: iPTF P48 Observations
  45. GRB 150721A (Fermi GBM Trigger 459150552): iPTF P48 Observations
  46. GRB 150724B: Swift-XRT afterglow detection
  47. GRB 150727A: Fermi GBM detection
  48. GRB 150724B: Continued RATIR Optical Observations
  49. GRB 150724B: MASTER upper limit
  50. GRB 150724B: Swift/UVOT Detection
  51. Konus-Wind observation of GRB 150724B
  52. GRB 150724B: Swift-XRT observations
  53. GRB 150724B: Swift ToO observations
  54. GRB 150724B: Fermi GBM detection
  55. GRB 150724B: Fermi-LAT detection
  56. Fermi GBM trigger 150725291 is not a GRB
  57. GRB 150721A: Fermi GBM detection
  58. Fermi GBM triggers bn150715759 and bn150715817 are not due to GRBs
  59. Fermi Gamma-ray Burst Monitor triggers that are not GRBs
  60. Fermi GBM trigger 458312518/150711543 is not a GRB
  61. GRB 150711A: Fermi GBM detection
  62. MASTER OT Detection during Fermi Trigger 458235025 inspection
  63. Fermi Gamma-ray Burst Monitor Trigger bn150705731 is not a GRB
  64. Konus-Wind observation of GRB 150702A
  65. GRB 150702A: Fermi GBM detection
  66. IPN Triangulation of GRB 150702A
  67. GRB 150702A: MASTER-SAAO inspection
  68. GRB 150702A: Swift-XRT observations
  69. GRB 150702A: Swift ToO observations
  70. GRB 150702A: Fermi-LAT detection
  71. Fermi GBM Observations is no longer triggerin on V404 Cyg
  72. Fermi Gamma-ray Burst Monitor Trigger 150626873 is not a GRB
  73. Fermi Gamma-ray Burst Monitor Trigger bn150628857 is not a GRB
  74. Fermi Gamma-ray Burst Monitor trigger bn150629779 is not a GRB
  75. Konus-Wind observation of GRB 150627A
  76. V404 Cyg activity (Swift, Fermi, INTGRAL, KONUS, MAXI detection): optical observations in TSHAO, Khureltogot, and AAO
  77. GRB 150627A: Swift/UVOT Detection
  78. GRB 150627A: Swift-XRT afterglow detection
  79. GRB 150627A: Fermi GBM observation
  80. GRB 150627A: Swift ToO observations
  81. GRB 150627A: Fermi-LAT detection
  82. Fermi Gamma-ray Burst Monitor triggers that are not GRBs
  83. Fermi Gamma-ray Burst Monitor triggers bn150622899 and bn150623043 are not GRBs
  84. V404 Cyg: Fermi GBM observations
  85. V404 Cyg outburst (Swift trigger 643949 ): TSHAO optical observations
  86. Konus-Wind observation of Galactic transient V404 Cyg in outburst
  87. Fermi GBM trigger 150616734 is not a GRB
  88. Fermi GBM trigger 150616594 is not a GRB
  89. Fermi Gamma-ray Burst Monitor triggers bn150615791 and bn150615798 are not GRBs
  90. Fermi GBM trigger 150615574 is not a GRB
  91. Fermi GBM trigger 150613619 is not a GRB
  92. Fermi GBM trigger 150612648 is not a GRB
  93. Fermi Gamma-ray Burst Monitor trigger 455474712 / 150608698 is not a GRB
  94. Konus-Wind observation of GRB 150607A
  95. GRB 150607A: Fermi GBM Detection
  96. Konus-Wind observation of GRB 150530A
  97. GRB 150530A: Fermi GBM observation
  98. Fermi GBM trigger 150529948 is not a GRB
  99. Konus-Wind observation of GRB 150527A
  100. GRB 150527A: Fermi GBM observation

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