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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"

14879 results found.

  1. GRB 150317A: Swift detection of a burst
  2. GRB 150314A: Early RAPTOR Detection
  3. Konus-Wind observation of GRB 150314A
  4. GRB 150314A: Swift/UVOT Detection
  5. GRB 150314A: Fermi-LAT detection
  6. GRB 150314A: Swift detection of a bright burst
  7. GRB 150313A: MAXI/GSC detection
  8. GRB 150311A: MAXI/GSC possible afterglow detection
  9. GRB 150309A: Fermi GBM detection
  10. GRB 150309A: Swift detection of a burst
  11. GRB 150305A: a long GRB detected by INTEGRAL
  12. Further X-ray observations of Swift J0045.2+4151 (aka Sw J0045 aka GRB 150301C aka [PFH2005] 622)
  13. GRB 150302A: BOOTES-2/TELMA upper limit
  14. GRB 150301C: XRT detection of a potential counterpart of BAT trigger 633105
  15. GRB 150220A: further Swift-XRT observations
  16. GRB 150302A: Swift detection of a burst
  17. GRB 150301B: Fermi GBM detection
  18. GRB 150301B: MASTER early OT detection
  19. GRB 150301B: Swift detection of a burst with an optical afterglow
  20. Swift Trigger 633173 is probably not an astrophysical source
  21. GRB 150301A: Swift detection of a short burst or new SGR
  22. Trigger 632888: Swift detection of the magnetar 4U 0142+61
  23. GRB 150222B: MAXI/GSC detection
  24. SGR 1935+2154: Swift-BAT refined analysis
  25. GRB 150222A: Swift detection of a burst
  26. Swift detection of an outburst from SGR 1935+2154
  27. Trigger 631946: Swift detection of H1745-203
  28. GRB 150219A: Swift-XRT afterglow detection
  29. Trigger 631747: Swift detection of 4U 0614+09
  30. GRB 150213B: Swift/UVOT Detection
  31. GRB 150213B: optical detection from the NOT
  32. GRB 150213B: Tautenburg Afterglow Detection
  33. GRB 150213B: Swift detection of a burst with an optical afterglow
  34. GRB 150213A: Fermi GBM detection
  35. GRB 150212A: No Swift/UVOT detection in initial observation
  36. GRB 150212A: Swift-XRT afterglow detection
  37. GRB 150212A: Swift detection of a burst
  38. GRB 150210A: MASTER SN detection during LAT error box inspection
  39. Konus-Wind observation of GRB 150210A
  40. GRB 150210A: Fermi-LAT detection
  41. GRB 150211A: No afterglow detection in the Swift/UVOT initial observation
  42. GRB 150211A: Swift detection of a burst
  43. GRB 150210A: Fermi GBM detection
  44. GRB 150202B: Swift/XRT afterglow confirmation
  45. GRB 150204A: Swift/XRT afterglow confirmation
  46. Konus-Wind observation of GRB 150206A
  47. GRB 150206A: Swift/UVOT Detection
  48. Konus-Wind observation of GRB 150202B
  49. GRB 150206B: Fermi GBM detection
  50. Trigger 630047: Swift detection of 1RXS J180408.9-342058
  51. GRB 150206A: MAXI/GSC detection
  52. GRB 150206A: Swift detection of a burst with an optical afterglow
  53. GRB 150204A: Fermi GBM detection
  54. Swift Trigger 629693 was a noise event
  55. GRB 150202B: Fermi GBM detection
  56. GRB 150202B: Fermi-LAT detection
  57. GRB 150203A: Swift detection of a burst
  58. GRB 150202A: Swift detection of a burst
  59. Konus-Wind observation of GRB 150201A
  60. GRB 150201A: Swift detection of a burst
  61. GRB 150128A: MASTER OT detction during inspection
  62. GRB 150127B: Fermi GBM detection
  63. Konus-Wind observation of GRB 150126A reveals its ultra-long nature
  64. GRB 150127A: Fermi-LAT detection
  65. GRB150127A: Fermi GBM Detection
  66. GRB 150126A: Fermi GBM Detection
  67. GRB 150126A: MAXI/GSC afterglow candidate detection
  68. GRB 150120A: possible AMI 15 GHz detection
  69. GRB 150123A: MAXI/GSC detection
  70. Konus-Wind observation of GRB 150118B
  71. GRB 150120B: GROND Afterglow Detection
  72. GRB 150118C: Fermi GBM Detection
  73. GRB 150110B: AMI 15 GHz detection of possible radio counterpart
  74. GRB 150101B/Swift J123205.1-105602, deep VLT observations
  75. GRB 150120B: Swift detection of a burst
  76. GRB 150120A: Swift detection of a possibly-short burst
  77. GRB 150118B: Fermi GBM Detection
  78. GRB 150118B: Fermi-LAT detection
  79. Trigger 626581: Swift detection of GRO J1008-57
  80. The Swift Detection of a Large Flare from the RS CVn Binary SZ Psc
  81. Swift detection of the variable star SZ Psc
  82. GRB 150110B: Fermi GBM Detection
  83. GRB 150110C: MAXI/GSC detection
  84. GRB 150110A: Fermi GBM Detection
  85. GRB 150110B: Swift detection of a burst
  86. GRB 150110A: MAXI/GSC detection
  87. GRB 150105A: Fermi GBM detection
  88. Swift detection of 4U 1700+24 (= V* V934 Her)
  89. GRB 150101B: potential host galaxy redshift by GTC
  90. GRB 150101B: Fermi GBM detection
  91. GRB 150103A: Swift detection of a burst
  92. GRB 150101A: Fermi GBM detection
  93. GRB 150101A: Swift detection of a short burst
  94. Konus-Wind observation of GRB 141229A
  95. GRB 141230A: Fermi GBM detection
  96. GRB 141229A: Fermi GBM detection
  97. GRB 141229A: MAXI/GSC detection
  98. GRB 141225A: Fermi GBM detection
  99. GRB 141225A: MASTER-SAAO first OT detection
  100. GRB 141225A: UVOT detection

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