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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"

14931 results found.

  1. GRB 140606B: Fermi GBM detection
  2. GRB 140606A: BOOTES-2 optical upper limit
  3. Swift XRT status update
  4. GRB 140606A: Swift detection of a short hard burst
  5. GRB 140528A: Fermi GBM Detection
  6. GRB 140529A: Swift-XRT afterglow detection.
  7. GRB 140529A found in ground analysis of BAT slew data
  8. Swift trigger 600114 is not an outbursting X-ray source
  9. Swift detection of a bright X-ray source in M31
  10. Swift detection of SFXT IGR J17544-2619
  11. Konus-Wind observation of GRB 140523A
  12. GRB 140523A: possible X-ray afterglow candidate from tiled Swift/XRT observations
  13. GRB 140523A: Fermi-LAT detection
  14. GRB 140523A: Fermi GBM detection
  15. GRB 140521A: Fermi GBM Detection
  16. GRB 140521A: Swift detection of a burst
  17. GRB 140518A: KAIT optical candidate
  18. GRB 140518A: Swift detection of a burst
  19. GRB 140516A: Swift detection of a short burst
  20. GRB 140515A: VLA Detection
  21. GRB 140515B: MAXI/GSC detection
  22. GRB 140515A: Swift/UVOT Upper Limits
  23. Trigger 599041: Swift detection of SFXT IGR J16479-4514
  24. GRB 140515A: Swift detection of a burst
  25. GRB 140508A: VLA detection
  26. Konus-Wind observation of GRB 140512A
  27. GRB 140512A: Continued UVOT Observations
  28. GRB 140512A: Fermi GBM detection
  29. GRB 140512A: Mondy optical detection
  30. GRB 140512A: Swift detection of a burst with an optical counterpart
  31. Fermi GBM Trigger 140429551 - Detection of a burst from SGR 1806-20
  32. GRB 140508A: Swift/UVOT Detection
  33. GRB 140509B: MAXI/GSC detection
  34. GRB 140509A: Swift/UVOT Detection and photo-z
  35. Konus-Wind observation of GRB 140508A
  36. GRB 140509A: Swift detection of a burst with an optical counterpart
  37. GRB 140508A: SAO RAS and MASTER photometric and spectroscopic observations
  38. GRB 140508A: Fermi GBM detection
  39. Konus-Wind observation of GRB 140506A
  40. GRB 140506A: Fermi GBM Detection
  41. GRB 140506A: Swift/UVOT Detection
  42. GRB 140506A: VLT/X-shooter spectroscopy
  43. GRB 140506A: Swift detection of a burst with an optical counterpart
  44. Swift Trigger 597860 is probably not a GRB
  45. GRB 140502A: Swift detection of a burst
  46. GRB 140501A: Fermi GBM detection
  47. GRB 140430A: Swift/UVOT Observations
  48. GRB140430A: Swift detection of a burst with an optical counterpart
  49. Trigger 597570: Swift detection of SGR 1806-20
  50. GRB 140428A: 1.5m OSN I-band detection
  51. GRB 140428A: Keck detection of a red optical afterglow candidate
  52. GRB 140428A: Swift-XRT detection of a source
  53. GRB 140428A: Swift Detection of a Possible Burst
  54. GRB 140423A: Further Observations with Swift/UVOT
  55. GRB 140423A: KAIT Optical Detection
  56. GRB 140423A: ISON-MN early photometry and correction to the GCN circ. 16143
  57. GRB 140423A: Swift/UVOT detection of a possible counterpart
  58. GRB 140423A: ROTSE-III Detection of Optical Counterpart
  59. GRB 140423A: Swift detection of a burst
  60. Swift Trigger 596641 is not a GRB
  61. GRB 140419A: CARMA early 3mm detection
  62. GRB 140419A: ROTSE-III Detection of Optical Counterpart
  63. GRB 140419A: Swift detection of a burst with optical afterglow
  64. Konus-Wind observation of GRB 140416A
  65. GRB 140416A: Fermi GBM detection
  66. Swift Trigger 595616: a possible GRB
  67. GRB 140412A: Swift detection of a burst
  68. GRB 140408A: 1.5m OSN optical upper limit
  69. Swift Trigger 595345 is not an astrophysical source
  70. GRB 140408A: GROND Detection of an Afterglow Candidate
  71. GRB 140408A: Swift/UVOT Upper Limits
  72. GRB 140408A: Fermi GBM detection
  73. GRB 140408A: Swift detection of a burst
  74. GRB 140402A: Marginal BAT detection
  75. GRB 140402A: Fermi GBM detection
  76. GRB 140402A: Fermi-LAT detection of a burst
  77. Swift trigger 594286: Is likely a noise trigger
  78. GRB 140331A: Swift/UVOT Upper Limits
  79. GRB 140330A: intense and persistent gamma-ray emission detected by AGILE
  80. Konus-Wind observation of GRB 140330A
  81. IPN triangulation of GRB 130330A
  82. GRB 140331A: Swift detection of a burst
  83. GRB 140330A: Fermi-LAT Detection
  84. GRB 140329A: Fermi-LAT detection
  85. Konus-Wind observation of GRB 140329A
  86. Swift trigger 593744: detection of a flare from UV Cet
  87. GRB 140323A : Suzaku WAM observation of the prompt emission
  88. Konus-Wind observation of GRB 140323A
  89. GRB 140323A: Fermi-LAT detection
  90. GRB 140323A: BOOTES-3 optical upper limit.
  91. GRB 140323A: Swift detection of a burst
  92. GRB 140320B: P60 detection of a very red afterglow
  93. GRB 140320C: Swift-XRT detection of the X-ray afterglow
  94. GRB 140320A: Fermi GBM detection
  95. GRB 140320B: Swift-XRT detection of the afterglow
  96. GRB 140320A: Swift-XRT detection of an afterglow candidate
  97. GRB 140320A: Swift detection of a burst
  98. GRB140318A: Discovery Channel Telescope Optical Detection
  99. GRB 140318A: NOT detection of the afterglow
  100. GRB 140318A: Swift detection of a burst

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