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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"

12172 results found.

  1. Fermi GBM Trigger 140429551 - Detection of a burst from SGR 1806-20
  2. GRB 140509B: MAXI/GSC detection
  3. GRB 140509A: Swift/UVOT Detection and photo-z
  4. GRB 140509A: Swift-XRT refined Analysis
  5. Konus-Wind observation of GRB 140508A
  6. GRB 140508A: Swift-XRT observations
  7. GRB 140509A: Swift detection of a burst with an optical counterpart
  8. GRB 140508A: SAO RAS and MASTER photometric and spectroscopic observations
  9. Konus-Wind observation of GRB 140506A
  10. Konus-Wind observation of GRB 140423A
  11. GRB 140430A: iTelescope.Net T16 Optical Observation
  12. GRB 140502A: Swift-BAT refined analysis
  13. GRB 140502A: Fermi GBM observation
  14. GRB 140502A: Swift detection of a burst
  15. GRB 140430A : Liverpool Telescope optical afterglow observations
  16. GRB140430A: Swift detection of a burst with an optical counterpart
  17. Konus-Wind observation of GRB 140428B
  18. IPN Triangulation of GRB 140428B (short/hard)
  19. Trigger 597570: Swift detection of SGR 1806-20
  20. GRB 140428A: NOT observations
  21. DG CVn: optical observations
  22. GRB 140423A: Nishi-Harima NIR Observations
  23. GRB 140423A: Swift-XRT refined Analysis
  24. Swift Trigger 596958 is positionally consistent with V* DG CVn/2XMM J133146.4+291635
  25. GRB 140423A: KAIT Optical Detection
  26. GRB 140423A: Swift-XRT observations
  27. GRB 140423A: optical afterglow candidate
  28. GRB 140423A: Swift detection of a burst
  29. GRB 140419A: Mondy optical observations
  30. GRB140419A: NOT optical observations
  31. GRB 140419A: KAIT Refined Analysis
  32. Konus-Wind observation of GRB 140419A
  33. GRB 140419A: Swift-XRT refined Analysis
  34. Konus-Wind observation of GRB 140416A
  35. GRB 140414A: Swift/UVOT Upper Limit
  36. Konus-Wind observation of GRB 140413A
  37. GRB 140413A: Swift-XRT refined Analysis
  38. GRB 140412A: Swift detection of a burst
  39. Swift Trigger 595345 is not an astrophysical source
  40. Fermi418277210: iPTF optical observations
  41. GRB 140402A: Fermi-LAT detection of a burst
  42. GRB 140331A: Swift-XRT refined Analysis
  43. Konus-Wind observation of GRB 140330A
  44. GRB 140330A: Fermi-LAT Detection
  45. GRB 140329A: Fermi-LAT detection
  46. Konus-Wind observation of GRB 140329A
  47. GRB 140320D: Suzaku WAM observation of the prompt emission
  48. GRB 140320C: Mondy optical observations and afterglow confirmation
  49. Konus-Wind observation of GRB 140323A
  50. GRB 140323A: Fermi-LAT detection
  51. GRB 140323A: Swift-XRT refined Analysis
  52. GRB 140323A: Swift-BAT refined analysis
  53. GRB 140323A: Swift detection of a burst
  54. Konus-Wind observation of GRB 140320D
  55. GRB 140320B: P60 detection of a very red afterglow
  56. IPN Triangulation of very intense GRB 140320D
  57. GRB 140320C: Swift-XRT observations
  58. GRB 140320A: Fermi GBM detection
  59. GRB 140320B: Swift-XRT detection of the afterglow
  60. GRB 140320C: Mondy optical observations
  61. GRB 140320C: MASTER optical observations
  62. GRB 140320C: FTN optical observations
  63. GRB 140320C: A long GRB detected by INTEGRAL
  64. GRB 140320B: ISON-NM optical observations
  65. GRB 140320B: A long GRB detected by INTEGRAL
  66. GRB 140320B: FTN optical afterglow candidate
  67. GRB 140318A: Swift-BAT refined analysis
  68. GRB 140311B: Mondy optical limit
  69. GRB 140311A: Mondy optical limits
  70. GRB 140318A: Swift-XRT refined Analysis
  71. GRB 140318A: NOT detection of the afterglow
  72. GRB140308A: Suzaku WAM observation of the prompt emission
  73. GRB 140311A: Montarrenti Observatory optical upper limit
  74. GRB 140311A: Swift-XRT refined Analysis
  75. GRB 140311B: Swift-XRT refined Analysis
  76. GRB 140311B: TAROT Calern observatory optical observations
  77. GRB 140311B: Swift-XRT observations
  78. Konus-Wind observation of GRB 140308A
  79. IPN Triangulation of GRB 140308A
  80. Konus-Wind observation of GRB 140306A
  81. IPN Triangulation of GRB 140306A
  82. GRB 140305A: Swift-BAT refined analysis
  83. Trigger 590503: Swift-BAT triggered on noise
  84. GRB 140305A: Swift detection of a burst
  85. GRB 140304A: Swift-XRT refined Analysis
  86. GRB 140304A: Redshift from the NOT
  87. GRB 140304A: NOT observations and redshift estimate
  88. GRB 140304A: Swift detection of a burst
  89. GRB140302A: Fermi GBM detection
  90. GRB 140302A: Swift-XRT refined Analysis
  91. GRB 140301A: Swift-BAT refined analysis
  92. GRB 140301A: Swift-XRT refined Analysis
  93. GRB 140301A: Swift detection of a burst
  94. Konus-Wind observation of GRB 140226A
  95. iPTF14yb: Swift-XRT detection
  96. GRB 140219A: MAXI/GSC detection
  97. GRB 140219A: the confirmation of the brightening SDSS J102406.41+062937.6 star
  98. GRB 140219A: MASTER optical brightening inside XRT-5 error box detection
  99. GRB 140219A: iPTF optical observations
  100. GRB 140102A: TAOS early optical afterglow detection

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