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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"

19611 results found.

  1. GRB 100905A: Swift/UVOT Upper Limits
  2. GRB 100901A: ISON-NM optical observations
  3. GRB 100906A: Swift-BAT refined analysis
  4. GRB 100906A: MASTER preliminary polarization prompt light curve
  5. GRB 100906A : Faulkes Telescope North optical observations
  6. GRB 100906A: MASTER early OT observations
  7. GRB 100906A: Swift detection of a burst with an optical afterglow
  8. GRB 100905A: Swift-XRT refined analysis.
  9. GRB 100905A: Enhanced Swift-XRT position
  10. GRB 100905A: Swift-BAT refined analysis
  11. GRB100904A: BOOTES-3 Upper Limit
  12. GRB 100905A: MASTER Prompt Optical Observations
  13. GRB 100905A: Faulkes Telescope North observations
  14. GRB 100905A: Swift detection of a burst
  15. GRB 100904A: Swift-BAT refined analysis
  16. GRB 100904A: Swift detection of a burst
  17. GRB 100902A: Swift-BAT refined analysis
  18. GRB 100901A: optical observation at Mt.Terskol
  19. GRB 100901A: multicolor photometry at Mt.Terskol
  20. IPN Triangulation of the very bright GRB 100829A
  21. GRB 100901A: Lightbuckets Optical Observations
  22. GRB 100902A: 1.5m OSN I-band Upper Limits
  23. Tentative redshift of GRB100902A from Swift-XRT data
  24. GRB 100902A: Swift XRT refined analysis
  25. GRB 100902A: Swift/UVOT Upper Limits
  26. GRB 100902A: optical observation at Mt.Terskol
  27. GRB 100901A: optical observation at Mt.Terskol
  28. GRB 100902A: Enhanced Swift-XRT position
  29. GRB 100901A: TLS Observations: Break?
  30. GRB 100902A: MASTER Prompt Optical Observations
  31. GRB 100901A: ISON-NM optical observations
  32. GRB 100902A: MASTER Optical Early Limit
  33. GRB 100902A: Swift detection of a burst
  34. GRB 100901A: 1.5m OSN BVRI-band observations.
  35. GRB 100901A: ROTSE-III Detection
  36. Swift/UVOT Observations of GRB100901A
  37. GRB 100901A: Swift-XRT Team refined analysis
  38. GRB 100901A: Swift-BAT refined analysis
  39. GRB 100901A: optical observation at Mt.Terskol
  40. GRB 100901A: Enhanced Swift-XRT position
  41. GRB 100901A: optical observation at Mt.Terskol
  42. GRB 100901A: MASTER power low decay
  43. GRB 100901A: MASTER: the OT brightenning
  44. GRB 100901A: confirmation of the afterglow
  45. GRB 100901A: MASTER Optical Early Limits
  46. GRB 100901A: Faulkes Telescope North afterglow candidate
  47. GRB 100901A: Swift detection of a burst with an optical afterglow
  48. GRB 100823A: optical upper limit
  49. GRB 100814A: Maidanak optical observations
  50. GRB 100823A: optical observations
  51. GRB 100823A: MAXI/GSC detection
  52. GRB 100725B: Mondy optical upper limit
  53. GRB 100725B: Maidanak optical upper limit
  54. GRB 100823A: Swift/UVOT Evidence for Fading Afterglow Emission
  55. GRB100807A: R band observations
  56. GRB100823A : MOA optical observation
  57. GRB 100823A: Swift XRT refined analysis
  58. GRB 100823: 1.5m OSN I-band observations
  59. GRB 100823A: Swift/UVOT Upper Limits
  60. GRB 100823A: Swift-BAT refined analysis
  61. GRB 100823A: Enhanced Swift-XRT position
  62. GRB 100823A: Swift detection of a burst
  63. GRB 100814A: Suzaku WAM observation of the prompt emission
  64. GRB 100814A: ISON-NM optical observations
  65. EVLA radio afterglow detection of GRB 100814A
  66. GRB 100814A: optical observations
  67. Konus-Wind observation of GRB 100816A
  68. GRB 100816A: Fermi GBM observation
  69. Konus-Wind observation of GRB 100814A
  70. GRB 100816A: Gemini-N spectroscopy
  71. GRB 100816A: Swift UVOT Observations
  72. GRB100816A Swift-XRT refined analysis
  73. GRB 100816A: Swift-BAT spectral lag results
  74. GRB 100816A: 1.23m CAHA optical observations
  75. GRB 100816A, Swift-BAT refined analysis
  76. GRB 100816A: Enhanced Swift-XRT position
  77. GRB100814A - interesting UVOT lightcurve.
  78. GRB 100816A: TAROT Calern observatory optical detection
  79. GRB100816A: TNG optical afterglow confirmation.
  80. GRB 100816A: ROTSE-III Optical Limits
  81. GRB 100816A: Swift detection of a possibly short burst with optical afterglow
  82. Swift-BAT trigger 431756 is not a burst
  83. Swift/UVOT observations of GRB100814A - title correction to GCN 11097
  84. GRB 100814A: Fermi GBM observation
  85. Swift/UVOT Observations of GRB100814A - a clearer table.
  86. GRB 100814A: Swift-XRT refined analysis
  87. Swift/UVOT observations of GRB100814A
  88. GRB 100814A, Swift-BAT refined analysis
  89. GRB 100814A: Enhanced Swift-XRT position
  90. GRB 100814A: GROND Detection of the Optical/NIR Afterglow
  91. GRB 100814A: IAC80 R-band observations
  92. GRB 100814A: Swift UVOT observations of the optical afterglow
  93. GRB 100814A: Swift detection of a burst with an optical afterglow
  94. GRB 100814A: ROTSE-III Detection of Optical Counterpart
  95. Swift-BAT trigger 431582 likely is IGR J17464-2811
  96. GRB 100805A: optical observation in CrAO (correction to the GCN 11077 and second epoch)
  97. GRB 100805A: Swift/UVOT Observations of a Possible Late-Time Brightening
  98. GRB 100807A: P200 Infrared Observations
  99. GRB100807A: optical observation in CrAO
  100. GRB 100805A: optical observation in CrAO

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