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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"

32716 results found.

  1. GRB100901A: MITSuME Okayama Optical Observation
  2. GRB 100901A: Swift-XRT Team refined analysis
  3. GRB 100901A - NOT optical observation
  4. GRB 100901A: Swift-BAT refined analysis
  5. GRB 100901A: optical observation at Mt.Terskol
  6. GRB 100901A: optical observation at Mt.Terskol
  7. GRB 100901A: MASTER power low decay
  8. GRB 100901A: Gemini-N Redshift
  9. GRB 100901A: MASTER: the OT brightenning
  10. GRB 100901A: confirmation of the afterglow
  11. GRB 100901A: MASTER Optical Early Limits
  12. GRB 100901A: Faulkes Telescope North afterglow candidate
  13. Konus-Wind observation of GRB 100826A
  14. IPN triangulation of GRB 100826A
  15. GRB 100823A: optical upper limit
  16. GRB 100814A: Maidanak optical observations
  17. GRB 100823A: optical observations
  18. GRB 100823A: MAXI/GSC detection
  19. GRB 100725B: Mondy optical upper limit
  20. GRB 100725B: Maidanak optical upper limit
  21. GRB 100823A: Swift/UVOT Evidence for Fading Afterglow Emission
  22. GRB100807A: R band observations
  23. GRB100823A : MOA optical observation
  24. GRB 100823A: Candidate IR afterglow
  25. GRB 100823A: Swift XRT refined analysis
  26. GRB 100823A: VLT/X-Shooter spectroscopy
  27. GRB 100823A - second epoch WHT observations
  28. GRB 100823A: TNG NIR observations
  29. GRB 100823A: Swift/UVOT Upper Limits
  30. GRB 100823A: WHT observations
  31. GRB 100823A: Swift-BAT refined analysis
  32. GRB 100814A: Suzaku WAM observation of the prompt emission
  33. GRB 100814A: ISON-NM optical observations
  34. EVLA radio afterglow detection of GRB 100814A
  35. GRB 100814A: optical observations
  36. GRB 100816A: Fermi GBM observation (correction to GCN 11124)
  37. Konus-Wind observation of GRB 100816A
  38. GRB100816A: MITSuME optical upper limits
  39. GRB 100816A: Fermi GBM observation
  40. GRB 100816A: VLT and Gemini-N revised redshift
  41. GRB 100814A : Liverpool Telescope Observations
  42. GRB 100814A: NOT optical observations
  43. GRB 100816A: NOT optical observations
  44. Konus-Wind observation of GRB 100814A
  45. GRB 100814A : Lulin optical observation
  46. GRB 100816A : Lulin r'-band observation
  47. GRB 100816A: Gemini-N spectroscopy
  48. GRB 100816A: Swift UVOT Observations
  49. GRB100816A Swift-XRT refined analysis
  50. GRB 100816A: Swift-BAT spectral lag results
  51. GRB 100816A, Swift-BAT refined analysis
  52. GRB 100816A: Gemini-N imaging
  53. GRB 100816A: CQUEAN riz-band Detection, Host Galaxy?
  54. GRB100814A - interesting UVOT lightcurve.
  55. GRB 100816A: MASTER Optical Limits
  56. GRB100816A: TNG optical afterglow confirmation.
  57. GRB 100816A: ROTSE-III Optical Limits
  58. GRB 100816A: Swift detection of a possibly short burst with optical afterglow
  59. Swift-BAT trigger 431756 is not a burst
  60. Swift/UVOT observations of GRB100814A - title correction to GCN 11097
  61. GRB 100814A: Fermi GBM observation
  62. Swift/UVOT Observations of GRB100814A - a clearer table.
  63. GRB 100814A: Swift-XRT refined analysis
  64. Swift/UVOT observations of GRB100814A
  65. GRB 100814A, Swift-BAT refined analysis
  66. GRB 100814A: CQUEAN r- and i-band Observation
  67. GRB 100814A: GROND Detection of the Optical/NIR Afterglow
  68. GRB 100814A: IAC80 R-band observations
  69. GRB100814A: Magellan Echellette Observations
  70. GRB 100814A: Swift UVOT observations of the optical afterglow
  71. GRB 100814A: ROTSE-III Detection of Optical Counterpart
  72. Swift-BAT trigger 431582 likely is IGR J17464-2811
  73. GRB 100805A: the 4-th epoch of SAO RAS optical observations
  74. GRB 100805A: optical observation in CrAO (correction to the GCN 11077 and second epoch)
  75. GRB 100802A: further NOT observation
  76. GRB 100805A: Swift/UVOT Observations of a Possible Late-Time Brightening
  77. GRB 100807A: P200 Infrared Observations
  78. GRB 100805A: the 3-rd epoch of SAO RAS optical observations
  79. GRB100807A: optical observation in CrAO
  80. GRB 100805A: optical observation in CrAO
  81. GRB 100805A: 2-nd epoch of SAO RAS optical observations
  82. GRB100807A: MITSuME optical upper limits
  83. GRB 100807A: Swift XRT refined analysis
  84. GRB 100807A: P60 Optical Afterglow Discovery
  85. GRB 100807A: Swift/UVOT Upper Limits
  86. GRB 100805A: SAO RAS optical observations
  87. GRB 100807A: Swift-BAT refined analysis
  88. GRB 100807A: ROTSE-III Optical Limits
  89. GRB 100805A: Xinglong TNT optical observation
  90. GRB 100805A: Early RAPTOR Observations
  91. GRB 100805A: ROTSE-III Optical detection
  92. GRB 100805A: Swift/UVOT Observations of the Optical Afterglow
  93. GRB 100802A: WIYN observations
  94. GRB 100805A: Swift-BAT refined analysis
  95. GRB 100805A: Swift-XRT Refined Analysis
  96. GRB 100805A: GRAS 002 optical observations
  97. GRB 100805A: Liverpool Telescope afterglow observations
  98. GRB 100805A: Further P60 Monitoring
  99. GRB 100805A: ROTSE-III Optical Limits
  100. GRB 100802A: Fermi GBM observation

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