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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"

19645 results found.

  1. GRB 100924A: Swift detection of a burst
  2. GRB 100917A: TAROT La Silla observatory optical observations
  3. GRB 100915A: TAROT Calern observatory optical observations
  4. GRB100906A: Ashra-1 observation of early optical emission
  5. GRB 100917A: Swift-BAT refined analysis
  6. GRB 100917A: Swift detection of a burst
  7. GRB 100915A: GRT Optical Observation
  8. GRB 100915A: Correction to Swift-BAT refined analysis
  9. GRB 100915A: Swift/UVOT Upper Limits
  10. GRB 100915A: Swift-BAT refined analysis
  11. GRB 100915A: Swift-XRT refined analysis
  12. GRB 100915A: Enhanced Swift-XRT position
  13. GRB 100915A: Swift detection of a likely burst
  14. Swift-BAT trigger 433953 is not a burst
  15. Swift BAT Trigger 433953 probably not a GRB
  16. GRB 100909A: Swift/UVOT observations
  17. GRB 100901A: optical observations in Mondy and R-light curve
  18. GRB 100909A: Swift-XRT refined analysis
  19. GRB 100906A: optical observations at Mt.Terskol
  20. GRB 100901A: optical observation in Maidanak, break confirmation
  21. GRB 100909A: Faulkes Telescope North afterglow candidate
  22. GRB 100909A: ROTSE-III Optical Limits
  23. GRB 100902A : Confirmation of afterglow and re-brightening with CFHT r’-band imaging
  24. GRB 100909A: Swift target of opportunity observation
  25. EVLA detection of radio afterglow of GRB100901A
  26. GRB 100901A: CrAO optical observations
  27. GRB100906A: R band observations
  28. Konus-Wind observation of GRB 100906A
  29. GRB 100906A: Fermi GBM observation
  30. GRB 100901A: TLS Detection at 5.5 days
  31. GRB 100906A: Swift-XRT refined analysis
  32. GRB 100906A: Enhanced Swift-XRT position
  33. GRB 100906A: Swift/UVOT Observations
  34. GRB 100906A: TLS Multicolor Observations
  35. GRB 100905A: Swift/UVOT Upper Limits
  36. GRB 100901A: ISON-NM optical observations
  37. GRB 100906A: Swift-BAT refined analysis
  38. GRB 100906A: MASTER preliminary polarization prompt light curve
  39. GRB 100906A : Faulkes Telescope North optical observations
  40. GRB 100906A: MASTER early OT observations
  41. GRB 100906A: Swift detection of a burst with an optical afterglow
  42. GRB 100905A: Swift-XRT refined analysis.
  43. GRB 100905A: Enhanced Swift-XRT position
  44. GRB 100905A: Swift-BAT refined analysis
  45. GRB100904A: BOOTES-3 Upper Limit
  46. GRB 100905A: MASTER Prompt Optical Observations
  47. GRB 100905A: Faulkes Telescope North observations
  48. GRB 100905A: Swift detection of a burst
  49. GRB 100904A: Swift-BAT refined analysis
  50. GRB 100904A: Swift detection of a burst
  51. GRB 100902A: Swift-BAT refined analysis
  52. GRB 100901A: optical observation at Mt.Terskol
  53. GRB 100901A: multicolor photometry at Mt.Terskol
  54. IPN Triangulation of the very bright GRB 100829A
  55. GRB 100901A: Lightbuckets Optical Observations
  56. GRB 100902A: 1.5m OSN I-band Upper Limits
  57. Tentative redshift of GRB100902A from Swift-XRT data
  58. GRB 100902A: Swift XRT refined analysis
  59. GRB 100902A: Swift/UVOT Upper Limits
  60. GRB 100902A: optical observation at Mt.Terskol
  61. GRB 100901A: optical observation at Mt.Terskol
  62. GRB 100902A: Enhanced Swift-XRT position
  63. GRB 100901A: TLS Observations: Break?
  64. GRB 100902A: MASTER Prompt Optical Observations
  65. GRB 100901A: ISON-NM optical observations
  66. GRB 100902A: MASTER Optical Early Limit
  67. GRB 100902A: Swift detection of a burst
  68. GRB 100901A: 1.5m OSN BVRI-band observations.
  69. GRB 100901A: ROTSE-III Detection
  70. Swift/UVOT Observations of GRB100901A
  71. GRB 100901A: Swift-XRT Team refined analysis
  72. GRB 100901A: Swift-BAT refined analysis
  73. GRB 100901A: optical observation at Mt.Terskol
  74. GRB 100901A: Enhanced Swift-XRT position
  75. GRB 100901A: optical observation at Mt.Terskol
  76. GRB 100901A: MASTER power low decay
  77. GRB 100901A: MASTER: the OT brightenning
  78. GRB 100901A: confirmation of the afterglow
  79. GRB 100901A: MASTER Optical Early Limits
  80. GRB 100901A: Faulkes Telescope North afterglow candidate
  81. GRB 100901A: Swift detection of a burst with an optical afterglow
  82. GRB 100823A: optical upper limit
  83. GRB 100814A: Maidanak optical observations
  84. GRB 100823A: optical observations
  85. GRB 100823A: MAXI/GSC detection
  86. GRB 100725B: Mondy optical upper limit
  87. GRB 100725B: Maidanak optical upper limit
  88. GRB 100823A: Swift/UVOT Evidence for Fading Afterglow Emission
  89. GRB100807A: R band observations
  90. GRB100823A : MOA optical observation
  91. GRB 100823A: Swift XRT refined analysis
  92. GRB 100823: 1.5m OSN I-band observations
  93. GRB 100823A: Swift/UVOT Upper Limits
  94. GRB 100823A: Swift-BAT refined analysis
  95. GRB 100823A: Enhanced Swift-XRT position
  96. GRB 100823A: Swift detection of a burst
  97. GRB 100814A: Suzaku WAM observation of the prompt emission
  98. GRB 100814A: ISON-NM optical observations
  99. EVLA radio afterglow detection of GRB 100814A
  100. GRB 100814A: optical observations

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