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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"

19664 results found.

  1. GRB 100615A: Swift/UVOT Upper Limits
  2. GRB 100614A: Swift/UVOT Upper Limits
  3. GRB 100614A: MASTER-Net optical alert observations
  4. GRB 100614A: Swift-BAT refined analysis
  5. GRB 100615A: Fermi GBM detection
  6. GRB 100615A: Swift-BAT refined analysis
  7. GRB 100614A: Enhanced Swift-XRT position
  8. GRB 100615A: Enhanced Swift-XRT position
  9. GRB 100615A: Swift-XRT refined analysis
  10. GRB 100614A: Swift-XRT refined analysis
  11. GRB 100615A: PAIRITEL NIR Upper Limits
  12. GRB 100615A: Swift detection of a burst
  13. GRB 100614A: Liverpool Telescope Observations
  14. GRB 100614A: Swift detection of a burst
  15. GRB 100606A: Suzaku WAM observation of the prompt emission
  16. Trigger 424161: Swift/BAT trigger on XTE J1946+274/GRO J1944+26
  17. Konus-Wind observation of GRB 100606A
  18. Radio detection of GRB100418a with ATCA
  19. GRB 100606A: Swift/UVOT Upper Limits
  20. GRB 100606A Swift-XRT refined analysis
  21. GRB 100606A: Swift-BAT refined analysis
  22. GRB 100606A: Enhanced Swift-XRT position
  23. Swift Trigger 424040 is not a GRB
  24. GRB 100606A: Prompt enhanced Swift-XRT position
  25. GRB 100606A: Swift detection of a burst
  26. Swift detection of outburst from the SFXT IGR J18410-0535
  27. GRB 100111A: Maidanak optical observations
  28. GRB 100418A: Maidanak optical observations
  29. GRB 100513A: CrAO optical observations
  30. GRB 100514A: CrAO optical observations
  31. GRB 100526A: optical upper limit
  32. Swift UVOT and UVOT-enhanced XRT position for GRB 100528A
  33. GRB100526B: GROND Upper limits
  34. GRB 100526B: Swift-XRT confirmation of fading afterglow
  35. GRB 100526B: Swift/UVOT Upper Limits
  36. GRB 100526A: Swift/UVOT Upper Limits
  37. GRB 100526A: Swift XRT refined analysis
  38. GRB 100526B: Swift-BAT refined analysis
  39. GRB 100526B: Swift XRT/UVOT observations
  40. GRB 100526A: Swift-BAT refined analysis
  41. GRB 100526A: Enhanced Swift-XRT position
  42. GRB 100526B: Swift detection of a probable GRB
  43. GRB 100526A: MASTER-Net optical alert observations
  44. GRB 100526A: Swift detection of a burst
  45. Konus-Wind observation of GRB 100522A
  46. GRB100522A: Suzaku WAM observation of the prompt emission
  47. GRB 100522A: GROND observations, upper limits
  48. Swift/UVOT observations of GRB100522A.
  49. GRB 100522A: Fermi GBM observation
  50. GRB 100522A: Swift XRT refined analysis
  51. GRB 100522A, Swift-BAT refined analysis
  52. GRB 100522A: Enhanced Swift-XRT position
  53. GRB 100522A: BOOTES-2 optical limit
  54. GRB 100522A: Swift detection of a burst
  55. GRB 100418A: CrAO optical observations
  56. GRB 100518A: Swift/UVOT Upper Limits
  57. GRB 100518A: Swift-XRT refined analysis
  58. GRB 100518A: Swift target of opportunity observation of the INTEGRAL burst
  59. Swift-BAT trigger 422437 is not anything astrophysical
  60. Swift Trigger 422437 is probably not a GRB
  61. GRB 100514A: optical afterglow confirmation
  62. GRB 100514A: Swift/UVOT Observations
  63. GRB 100514A: Swift XRT refined analysis
  64. GRB 100514A: MASTER-Net optical observations
  65. GRB 100514A: Enhanced Swift-XRT position
  66. GRB 100514A: Swift-BAT refined analysis
  67. GRB 100514A: Faulkes Telescope South observations
  68. GRB 100514A: Swift detection of a burst
  69. GRB 100513A: Faulkes Telescope South observations
  70. GRB 100513A: Swift/UVOT upper limits
  71. GRB 100513A, RIMOTS optical upper limits
  72. GRB 100513A: Swift XRT refined analysis
  73. GRB 100513A: Swift-BAT refined analysis
  74. GRB 100513A: Enhanced Swift-XRT position
  75. GRB 100513A: PAIRITEL NIR afterglow candidate
  76. GRB 100513A: Swift detection of a burst
  77. GRB 100511A: Super-LOTIS early observations
  78. Swift-BAT trigger 421695 is likely not astrophysical
  79. GRB 100511A, RIMOTS optical upper limits
  80. Trigger 421695: Swift detection of a possible burst
  81. GRB100508A: Further Swift/UVOT Observations
  82. GRB 100508A: GROND Detection of the optical afterglow
  83. GRB 100508A: Swift-XRT Refined analysis
  84. GRB 100508A: Swift-BAT refined analysis
  85. GRB 100508A: Enhanced Swift-XRT position
  86. GRB100508A: Swift/UVOT Detection of the Afterglow
  87. GRB 100508A: ROTSE-III Optical Limits
  88. GRB 100508A: Swift detection of a burst
  89. Swift-BAT refined analysis of trigger 421262
  90. GRB 100504A: Fermi GBM observation
  91. An SGR-like burst from the magnetar 1E 1841-04.5 in Kes 73
  92. GRB 100504A: Swift/UVOT Observations
  93. GRB 100418A: Flattening of the Swift/UVOT Optical Light Curve
  94. GRB 100504A: Swift-XRT refined analysis
  95. GRB 100504A: Enhanced Swift-XRT position
  96. GRB 100504A: GROND Upper limits
  97. GRB 100504A: Swift-BAT refined analysis
  98. GRB 100504A: UVOT-enhanced XRT position
  99. GRB 100504A: Swift detection of a burst
  100. Swift-BAT trigger 421072 is not astrophyical

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