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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"

19662 results found.

  1. GRB 100823A: optical observations
  2. GRB 100823A: MAXI/GSC detection
  3. GRB 100725B: Mondy optical upper limit
  4. GRB 100725B: Maidanak optical upper limit
  5. GRB 100823A: Swift/UVOT Evidence for Fading Afterglow Emission
  6. GRB100807A: R band observations
  7. GRB100823A : MOA optical observation
  8. GRB 100823A: Swift XRT refined analysis
  9. GRB 100823: 1.5m OSN I-band observations
  10. GRB 100823A: Swift/UVOT Upper Limits
  11. GRB 100823A: Swift-BAT refined analysis
  12. GRB 100823A: Enhanced Swift-XRT position
  13. GRB 100823A: Swift detection of a burst
  14. GRB 100814A: Suzaku WAM observation of the prompt emission
  15. GRB 100814A: ISON-NM optical observations
  16. EVLA radio afterglow detection of GRB 100814A
  17. GRB 100814A: optical observations
  18. Konus-Wind observation of GRB 100816A
  19. GRB 100816A: Fermi GBM observation
  20. Konus-Wind observation of GRB 100814A
  21. GRB 100816A: Gemini-N spectroscopy
  22. GRB 100816A: Swift UVOT Observations
  23. GRB100816A Swift-XRT refined analysis
  24. GRB 100816A: Swift-BAT spectral lag results
  25. GRB 100816A: 1.23m CAHA optical observations
  26. GRB 100816A, Swift-BAT refined analysis
  27. GRB 100816A: Enhanced Swift-XRT position
  28. GRB100814A - interesting UVOT lightcurve.
  29. GRB 100816A: TAROT Calern observatory optical detection
  30. GRB100816A: TNG optical afterglow confirmation.
  31. GRB 100816A: ROTSE-III Optical Limits
  32. GRB 100816A: Swift detection of a possibly short burst with optical afterglow
  33. Swift-BAT trigger 431756 is not a burst
  34. Swift/UVOT observations of GRB100814A - title correction to GCN 11097
  35. GRB 100814A: Fermi GBM observation
  36. Swift/UVOT Observations of GRB100814A - a clearer table.
  37. GRB 100814A: Swift-XRT refined analysis
  38. Swift/UVOT observations of GRB100814A
  39. GRB 100814A, Swift-BAT refined analysis
  40. GRB 100814A: Enhanced Swift-XRT position
  41. GRB 100814A: GROND Detection of the Optical/NIR Afterglow
  42. GRB 100814A: IAC80 R-band observations
  43. GRB 100814A: Swift UVOT observations of the optical afterglow
  44. GRB 100814A: Swift detection of a burst with an optical afterglow
  45. GRB 100814A: ROTSE-III Detection of Optical Counterpart
  46. Swift-BAT trigger 431582 likely is IGR J17464-2811
  47. GRB 100805A: optical observation in CrAO (correction to the GCN 11077 and second epoch)
  48. GRB 100805A: Swift/UVOT Observations of a Possible Late-Time Brightening
  49. GRB 100807A: P200 Infrared Observations
  50. GRB100807A: optical observation in CrAO
  51. GRB 100805A: optical observation in CrAO
  52. GRB 100807A: Swift XRT refined analysis
  53. GRB 100807A: P60 Optical Afterglow Discovery
  54. GRB 100807A: Swift/UVOT Upper Limits
  55. GRB 100807A: Enhanced Swift-XRT position
  56. GRB 100807A: Swift-BAT refined analysis
  57. GRB 100807A: ROTSE-III Optical Limits
  58. GRB 100807A: Swift detection of a burst
  59. GRB 100805A: Early RAPTOR Observations
  60. GRB 100805A: Swift/UVOT Observations of the Optical Afterglow
  61. Swift-BAT trigger 430975 is not a burst
  62. GRB 100805A: Swift-BAT refined analysis
  63. GRB 100805A: Swift-XRT Refined Analysis
  64. Trigger 430975: Swift detection of a possible burst
  65. GRB 100805A: I-band detection from 1.23m CAHA telescope.
  66. GRB 100805A: Enhanced Swift-XRT position
  67. GRB 100805A: Liverpool Telescope afterglow observations
  68. GRB 100805A: P60 Optical Afterglow Candidate
  69. GRB 100805A: Enhanced Swift-XRT position
  70. GRB 100805A: ROTSE-III Optical Limits
  71. GRB 100805A: Swift detection of a burst with an optical counterpart
  72. GRB 100802A: Fermi GBM observation
  73. GRB 100728B: optical photometry of ISON-NM
  74. GRB 100802A: XRT refined analysis
  75. GRB 100802A: Swift/UVOT Possible Optical Afterglow
  76. GRB 100728A: Suzaku WAM observation of the prompt emission
  77. GRB 100802A: Enhanced Swift-XRT position
  78. GRB 100802A: Swift-BAT refined analysis
  79. GRB 100802A: Liverpool Telescope observations
  80. GRB 100802A: ROTSE-III Optical Limits
  81. GRB 100802A: Possible Swift/UVOT Detection of Optical Afterglow
  82. GRB 100802A: Swift detection of a burst
  83. GRB 100725B: TELMA optical observation
  84. GRB 100728B: Swift/UVOT Observations (correction to GCN 11028)
  85. GRB 100728B: Swift/UVOT Observations (correction)
  86. GRB 100728B: Swift/UVOT Observations
  87. GRB 100728B: Lick Observations
  88. GRB 100728B, Swift-BAT refined analysis
  89. GRB 100728B: Swift-XRT Refined Analysis
  90. Konus-Wind observation of GRB 100728A
  91. GRB 100728A: GROND Detection of the NIR Afterglow Candidate
  92. GRB 100727A: Swift/UVOT Upper Limits
  93. GRB 100728A, Swift-BAT refined analysis
  94. GRB 100728B: Enhanced Swift-XRT position
  95. GRB 100728A: Swift/UVOT Upper Limits
  96. GRB 100728B: Fermi GBM observation
  97. GRB 100728A: Swift-XRT refined analysis
  98. GRB 100728B: GROND Detection of the NIR Afterglow
  99. GRB 100728B: optical detection
  100. GRB 100728B: Skynet/PROMPT Detections (correction)

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