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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"

20008 results found.

  1. GRB 100526A: Enhanced Swift-XRT position
  2. GRB 100526B: Swift detection of a probable GRB
  3. GRB 100526A: MASTER-Net optical alert observations
  4. GRB 100526A: Swift detection of a burst
  5. Konus-Wind observation of GRB 100522A
  6. GRB100522A: Suzaku WAM observation of the prompt emission
  7. GRB 100522A: GROND observations, upper limits
  8. Swift/UVOT observations of GRB100522A.
  9. GRB 100522A: Fermi GBM observation
  10. GRB 100522A: Swift XRT refined analysis
  11. GRB 100522A, Swift-BAT refined analysis
  12. GRB 100522A: Enhanced Swift-XRT position
  13. GRB 100522A: BOOTES-2 optical limit
  14. GRB 100522A: Swift detection of a burst
  15. GRB 100418A: CrAO optical observations
  16. GRB 100518A: Swift/UVOT Upper Limits
  17. GRB 100518A: Swift-XRT refined analysis
  18. GRB 100518A: Swift target of opportunity observation of the INTEGRAL burst
  19. Swift-BAT trigger 422437 is not anything astrophysical
  20. Swift Trigger 422437 is probably not a GRB
  21. GRB 100514A: optical afterglow confirmation
  22. GRB 100514A: Swift/UVOT Observations
  23. GRB 100514A: Swift XRT refined analysis
  24. GRB 100514A: MASTER-Net optical observations
  25. GRB 100514A: Enhanced Swift-XRT position
  26. GRB 100514A: Swift-BAT refined analysis
  27. GRB 100514A: Faulkes Telescope South observations
  28. GRB 100514A: Swift detection of a burst
  29. GRB 100513A: Faulkes Telescope South observations
  30. GRB 100513A: Swift/UVOT upper limits
  31. GRB 100513A, RIMOTS optical upper limits
  32. GRB 100513A: Swift XRT refined analysis
  33. GRB 100513A: Swift-BAT refined analysis
  34. GRB 100513A: Enhanced Swift-XRT position
  35. GRB 100513A: PAIRITEL NIR afterglow candidate
  36. GRB 100513A: Swift detection of a burst
  37. GRB 100511A: Super-LOTIS early observations
  38. Swift-BAT trigger 421695 is likely not astrophysical
  39. GRB 100511A, RIMOTS optical upper limits
  40. Trigger 421695: Swift detection of a possible burst
  41. GRB100508A: Further Swift/UVOT Observations
  42. GRB 100508A: GROND Detection of the optical afterglow
  43. GRB 100508A: Swift-XRT Refined analysis
  44. GRB 100508A: Swift-BAT refined analysis
  45. GRB 100508A: Enhanced Swift-XRT position
  46. GRB100508A: Swift/UVOT Detection of the Afterglow
  47. GRB 100508A: ROTSE-III Optical Limits
  48. GRB 100508A: Swift detection of a burst
  49. Swift-BAT refined analysis of trigger 421262
  50. GRB 100504A: Fermi GBM observation
  51. An SGR-like burst from the magnetar 1E 1841-04.5 in Kes 73
  52. GRB 100504A: Swift/UVOT Observations
  53. GRB 100418A: Flattening of the Swift/UVOT Optical Light Curve
  54. GRB 100504A: Swift-XRT refined analysis
  55. GRB 100504A: Enhanced Swift-XRT position
  56. GRB 100504A: GROND Upper limits
  57. GRB 100504A: Swift-BAT refined analysis
  58. GRB 100504A: UVOT-enhanced XRT position
  59. GRB 100504A: Swift detection of a burst
  60. Swift-BAT trigger 421072 is not astrophyical
  61. INTEGRAL observations of Swift GRB trigger 421072
  62. GRB100423A : Suzaku WAM observation of the prompt emission
  63. Trigger 421072: Possible Swift detection of a GRB or transient
  64. GRB 100420A: Terskol optical upper limit
  65. GRB 100427A: Swift XRT and UVOT Upper Limits
  66. GRB 100427A: Fermi GBM detection
  67. GRB 100427A detected in ground analysis of Swift BAT data
  68. Konus-Wind observation of GRB 100423A
  69. GRB 100423A: CrAO optical observations
  70. GRB 100418A: Terskol optical observations
  71. GRB 100424A: CrAO optical observations
  72. GRB 100425A: Swift XRT refined analysis
  73. GRB100425A: Swift/UVOT Upper Limits
  74. GRB 100424A: Swift/UVOT Upper Limits
  75. GRB 100425A: Enhanced Swift-XRT position
  76. GRB 100425A: Swift-BAT refined analysis
  77. GRB 100425A: GROND afterglow observation
  78. GRB 100424A: D50 optical limits
  79. GRB 100424A : Lulin early z'-band upper limit
  80. GRB 100424A: GROND Upper Limits
  81. GRB 100424A: PAIRITEL NIR Upper Limits
  82. GRB 100424A: Swift-XRT refined analysis
  83. GRB 100425A: Swift detection of a burst
  84. GRB 100424A, Swift-BAT refined analysis
  85. GRB 100424A: Enhanced Swift-XRT position
  86. GRB 100424A: Prompt enhanced Swift-XRT position.
  87. GRB 100424A: Swift detection of a burst
  88. GRB 100420A: GRT Optical Observation
  89. Swift-BAT refined analysis of trigger 420256
  90. Swift Trigger 420256: D50 optical limits
  91. GRB 100418A: Possible Evidence for a Supernova
  92. GRB 100420A: Swift-BAT refined analysis
  93. GRB 100423A: Swift-BAT refined analysis
  94. Swift Trigger 420256: IAC80 R-band observations
  95. Swift Trigger 420256: BOOTES-2 observations
  96. Swift Trigger 420256: ROTSE-III Optical Limits
  97. Trigger 420256: Swift detection of a possible GRB
  98. GRB 100423A: Skynet/PROMPT Detections
  99. GRB 100423A: GROND discovery of afterglow
  100. GRB 100423A: Swift detection of a burst

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