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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"

23687 results found.

  1. GRB 100829.9: MASTER Optical Limits
  2. IPN triangulation of GRB 100826A
  3. GRB 100814A: Maidanak optical observations
  4. GRB 100823A: optical observations
  5. GRB 100823A: MAXI/GSC detection
  6. GRB 100725B: Maidanak optical upper limit
  7. GRB 100823A: Swift/UVOT Evidence for Fading Afterglow Emission
  8. GRB 100823A: VLT/X-Shooter spectroscopy
  9. GRB 100823A: TNG NIR observations
  10. GRB 100823A: WHT observations
  11. GRB 100823A: Swift-BAT refined analysis
  12. GRB 100823A: Swift detection of a burst
  13. GRB 100814A: Suzaku WAM observation of the prompt emission
  14. GRB 100814A: ISON-NM optical observations
  15. GRB 100814A: optical observations
  16. Konus-Wind observation of GRB 100816A
  17. GRB100816A: MITSuME optical upper limits
  18. GRB 100816A: 10.4-m GTC redshift confirmation
  19. Konus-Wind observation of GRB 100814A
  20. GRB 100816A: Swift UVOT Observations
  21. GRB100816A Swift-XRT refined analysis
  22. GRB 100816A: Swift-BAT spectral lag results
  23. GRB 100816A: 1.23m CAHA optical observations
  24. GRB 100816A, Swift-BAT refined analysis
  25. GRB 100816A: Gemini-N imaging
  26. GRB100814A - interesting UVOT lightcurve.
  27. GRB 100816A: TAROT Calern observatory optical detection
  28. GRB 100816A: MASTER Optical Limits
  29. GRB100816A: TNG optical afterglow confirmation.
  30. GRB 100816A: Swift detection of a possibly short burst with optical afterglow
  31. Swift/UVOT observations of GRB100814A - title correction to GCN 11097
  32. GRB 100814A: Submm observations from APEX
  33. Swift/UVOT Observations of GRB100814A - a clearer table.
  34. Swift/UVOT observations of GRB100814A
  35. GRB 100814A, Swift-BAT refined analysis
  36. GRB 100814A: Enhanced Swift-XRT position
  37. GRB 100814A: GROND Detection of the Optical/NIR Afterglow
  38. GRB 100814A: IAC80 R-band observations
  39. GRB 100814A: Swift detection of a burst with an optical afterglow
  40. Swift-BAT trigger 431582 likely is IGR J17464-2811
  41. GRB 100805A: Swift/UVOT Observations of a Possible Late-Time Brightening
  42. GRB100807A: MITSuME optical upper limits
  43. GRB 100807A: Swift-BAT refined analysis
  44. GRB 100807A: Swift detection of a burst
  45. GRB 100805A: IAC80 and 1.5m OSN optical observations
  46. GRB 100805A: IAC80 BVR-band observations
  47. GRB 100805A: Swift-BAT refined analysis
  48. GRB 100805A: Swift-XRT Refined Analysis
  49. Trigger 430975: Swift detection of a possible burst
  50. GRB 100805A: I-band detection from 1.23m CAHA telescope.
  51. GRB 100805A: Liverpool Telescope afterglow observations
  52. GRB 100805A: Enhanced Swift-XRT position
  53. GRB 100805A: Swift detection of a burst with an optical counterpart
  54. GRB 100728B: optical photometry of ISON-NM
  55. GRB 100713A: second epoch Maidanak optical observation
  56. GRB100802A: MITSuME optical upper limits
  57. GRB 100802A: P60 Observations
  58. GRB 100728A: Suzaku WAM observation of the prompt emission
  59. GRB 100802A: Swift-BAT refined analysis
  60. GRB 100802A: Liverpool Telescope observations
  61. GRB 100802A: Possible Swift/UVOT Detection of Optical Afterglow
  62. GRB 100802A: Swift detection of a burst
  63. GRB 100725B: TELMA optical observation
  64. GRB 100728B, Swift-BAT refined analysis
  65. Konus-Wind observation of GRB 100728A
  66. GRB 100728A: GROND Detection of the NIR Afterglow Candidate
  67. GRB 100728A, Swift-BAT refined analysis
  68. GRB 100728B: GROND Detection of the NIR Afterglow
  69. GRB 100728B: optical detection
  70. GRB 100728B: Skynet/PROMPT Detections (correction)
  71. GRB 100728B: Swift detection of a burst with an optical counterpart
  72. GRB 100728A: Skynet/PROMPT Detections
  73. GRB 100728A: Swift detection of a burst
  74. GRB 100727A, Swift-BAT refined analysis
  75. GRB 100727A: Swift detection of a burst
  76. GRB100725B: MITSuME optical upper limits
  77. GRB 100724B: AGILE/GRID analysis
  78. GRB 100724B: Suzaku WAM observation of the prompt emission
  79. GRB 100724B: gamma-ray detection by AGILE
  80. GRB 100725B: Swift-BAT refined analysis
  81. GRB 100725A: Swift-BAT refined analysis
  82. GRB 100725B: Swift detection of a burst
  83. GRB100725A Faulkes Telescope South observations
  84. Konus-Wind observation of GRB 100724B
  85. GRB 100725A: Swift detection of a burst
  86. GRB 100724B: Fermi GBM detection
  87. GRB 100724A: Swift-BAT refined analysis
  88. GRB 100724A: Swift detection of a burst
  89. GRB 100614A: 10.4-m GTC deep-optical limit
  90. GRB 100718A: MASTER-Net optical prompt and alert observations
  91. GRB 100719A: Swift-BAT refined analysis
  92. GRB 100719A: Swift detection of a burst
  93. GRB 100713A: optical observation in Maidanak
  94. GRB 100713A: further inspection of TNG images
  95. GRB 100713A : IRSF/SIRIUS NIR upper limits
  96. GRB100713A: Swift/UVOT observations
  97. GRB 100713A: GROND upper limits
  98. GRB 100713A: TNG optical observations
  99. GRB 100713A: TELMA and 1.5m OSN optical observations
  100. GRB100713A: Swift X-ray afterglow detection

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