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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"

27593 results found.

  1. GRB100826A: Fermi-LAT Observations
  2. GRB 100823A: MAXI/GSC detection
  3. GRB100807A: R band observations
  4. GRB 100823A: Swift XRT refined analysis
  5. GRB 100823A: Swift/UVOT Upper Limits
  6. GRB 100823A: Swift-BAT refined analysis
  7. GRB 100823A: Swift detection of a burst
  8. GRB 100814A: Suzaku WAM observation of the prompt emission
  9. GRB 100814B: Fermi GBM detection
  10. Konus-Wind observation of GRB 100816A
  11. GRB 100816A: Fermi GBM observation
  12. Konus-Wind observation of GRB 100814A
  13. GRB 100814A : Lulin optical observation
  14. GRB 100816A: Swift UVOT Observations
  15. GRB100816A Swift-XRT refined analysis
  16. GRB 100816A: Swift-BAT spectral lag results
  17. GRB 100816A, Swift-BAT refined analysis
  18. GRB 100816A: CQUEAN riz-band Detection, Host Galaxy?
  19. GRB100814A - interesting UVOT lightcurve.
  20. GRB 100816A: TAROT Calern observatory optical detection
  21. GRB 100816A: MASTER Optical Limits
  22. GRB100816A: TNG optical afterglow confirmation.
  23. GRB 100816A: ROTSE-III Optical Limits
  24. GRB 100816A: Swift detection of a possibly short burst with optical afterglow
  25. Swift-BAT trigger 431756 is not a burst
  26. GRB 100814A: Fermi GBM observation
  27. GRB 100814A: Swift-XRT refined analysis
  28. Swift/UVOT observations of GRB100814A
  29. GRB 100814A, Swift-BAT refined analysis
  30. GRB 100814A: CQUEAN r- and i-band Observation
  31. GRB 100814A: GROND Detection of the Optical/NIR Afterglow
  32. GRB100814A: Magellan Echellette Observations
  33. GRB 100814A: Swift UVOT observations of the optical afterglow
  34. GRB 100814A: Swift detection of a burst with an optical afterglow
  35. GRB 100814A: ROTSE-III Detection of Optical Counterpart
  36. Swift-BAT trigger 431582 likely is IGR J17464-2811
  37. GRB 100805A: optical observation in CrAO (correction to the GCN 11077 and second epoch)
  38. GRB 100805A: Swift/UVOT Observations of a Possible Late-Time Brightening
  39. GRB 100807A: P200 Infrared Observations
  40. GRB 100807A: Swift XRT refined analysis
  41. GRB 100807A: P60 Optical Afterglow Discovery
  42. GRB 100807A: Swift/UVOT Upper Limits
  43. GRB 100807A: Swift-BAT refined analysis
  44. GRB 100807A: ROTSE-III Optical Limits
  45. GRB 100807A: Swift detection of a burst
  46. GRB 100805A: Early RAPTOR Observations
  47. GRB 100805A: Swift/UVOT Observations of the Optical Afterglow
  48. GRB 100802A: WIYN observations
  49. Swift-BAT trigger 430975 is not a burst
  50. GRB 100805A: Swift-BAT refined analysis
  51. GRB 100805A: Swift-XRT Refined Analysis
  52. Trigger 430975: Swift detection of a possible burst
  53. GRB 100805A: Liverpool Telescope afterglow observations
  54. GRB 100805A: P60 Optical Afterglow Candidate
  55. GRB 100805A: Enhanced Swift-XRT position
  56. GRB 100805A: ROTSE-III Optical Limits
  57. GRB 100805A: Swift detection of a burst with an optical counterpart
  58. GRB 100802A: Fermi GBM observation
  59. GRB 100802A: NOT optical observation
  60. GRB 100802A: P60 Observations
  61. GRB 100802A: XRT refined analysis
  62. GRB 100802A: Swift/UVOT Possible Optical Afterglow
  63. GRB 100728A: Suzaku WAM observation of the prompt emission
  64. GRB 100802A: Swift-BAT refined analysis
  65. GRB 100802A: Liverpool Telescope observations
  66. GRB 100802A: ROTSE-III Optical Limits
  67. GRB 100802A: Possible Swift/UVOT Detection of Optical Afterglow
  68. GRB 100802A: Swift detection of a burst
  69. GRB 100728B - NOT optical observation
  70. GRB 100728B: Swift/UVOT Observations
  71. GRB 100728B: Lick Observations
  72. GRB 100728B: Continued KAIT observations
  73. GRB 100728B, Swift-BAT refined analysis
  74. GRB 100728B: Swift-XRT Refined Analysis
  75. Konus-Wind observation of GRB 100728A
  76. GRB 100728A: GROND Detection of the NIR Afterglow Candidate
  77. GRB 100727A: Swift/UVOT Upper Limits
  78. GRB 100728A, Swift-BAT refined analysis
  79. GRB 100728A: Swift/UVOT Upper Limits
  80. GRB 100728B: Fermi GBM observation
  81. GRB 100728A: Swift-XRT refined analysis
  82. GRB 100728B: GROND Detection of the NIR Afterglow
  83. GRB 100728B: Skynet/PROMPT Detections (correction)
  84. GRB 100728B: KAIT optical afterglow detection (correction)
  85. GRB 100728B: Swift detection of a burst with an optical counterpart
  86. GRB 100728A: Skynet/PROMPT Detections
  87. GRB 100728A: KAIT optical afterglow detection
  88. GRB 100728A: Fermi GBM observation
  89. GRB 100728A: Swift detection of a burst
  90. GRB 100727A: Swift XRT refined analysis
  91. GRB 100727A: Fermi GBM observation
  92. GRB 100727A, Swift-BAT refined analysis
  93. GRB 100727A: Swift detection of a burst
  94. GRB 100724B: Suzaku WAM observation of the prompt emission
  95. GRB 100725B: Swift-BAT refined analysis
  96. GRB 100725B: refined XRT analysis
  97. GRB 100725A: GROND upper limits
  98. GRB 100725B: Swift/UVOT Upper Limits
  99. GRB 100725A: Swift/UVOT Upper Limits
  100. GRB 100725A: Swift-BAT refined analysis

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