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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"

11790 results found.

  1. A bright burst from AXP 1E 1547.0-5408/SGR J1550-5418
  2. GRB 090313: VLT spectroscopy
  3. Konus-Wind observation of GRB 090315
  4. GRB 090313: TAROT La Silla observatory optical detection
  5. GRB 090313: Gemini-S redshift
  6. GRB 090313: Swift-BAT refined analysis
  7. GRB 090313: Sustained optical brightness
  8. GRB090305B: Fermi GBM detection
  9. GRB 090308: Swift-XRT refined analysis
  10. GRB 090308: Swift detection of a burst
  11. GRB 090307: Swift-BAT refined analysis of trigger 345551
  12. GRB 090306: Swift detection of a possible burst
  13. GRB 090228B: Fermi GBM detection
  14. Konus-Wind observation of bright short GRB 090227B
  15. IPN localization of short bright GRB 090227B
  16. Konus-Wind observation of GRB 090301A
  17. GRB 090301A: Swift-BAT refined analysis
  18. Swift_BAT_Lightcurve Notice for Trigger Number 344565 is not valid
  19. GRB 090227: Fermi GBM detection
  20. Ongoing activity of AXP/SGR 1E1547.0-5408
  21. Konus-Wind observation of GRB 090217
  22. GRB090217: Fermi-LAT Detection
  23. SGR activity seen by BAT during ICSP Ionospheric Events
  24. Detailed lightcurves of ICSP VLF Observation of SGR/AXP 1E1547.0-5408
  25. Fermi Gamma-ray Burst Monitor trigger 255729682 is not a GRB
  26. GRB 090205: VLT spectroscopic redshift
  27. GRB 090205: Swift detection of a burst
  28. Konus-Wind observation of GRB 090201
  29. GRB 090201: Swift-XRT refined analysis
  30. GRB 090201: Swift-BAT refined analysis
  31. GRB090113: MAGIC telescope GeV observation
  32. GRB 090201: ROTSE-III Optical Limits
  33. Konus-Wind observation of bright burst from AXP/SGR 1E1547.0-5408 on January 29
  34. GRB 090129: Swift detection of a burst
  35. Konus-Wind observation of AXP/SGR 1E1547.0-5408 bursting activity
  36. GRB 090126: SuperAGILE Localization of a Long GRB
  37. GRB 090123: Swift/UVOT Observations
  38. AXP 1E1547.0-5408: Fermi GBM detection of additional bursts
  39. GRB 090118: Subaru NIR Observation
  40. GRB 090118: Swift-XRT observations
  41. GRB090118 Swift/UVOT upper limits
  42. GRB 090118: Possible burst detection from Swift-BAT slew data
  43. GRB 090117 - SuperAGILE Localization of a long GRB
  44. GRB 090113: GROND Upper Limits
  45. GRB 090113: Swift-XRT refined analysis
  46. GRB 090113: Observations from NOT
  47. GRB 090113: ROTSE-III Optical Limits
  48. GRB 090113: Swift detection of a burst
  49. GRB 090112: Fermi GBM detection
  50. GRB 090111: Swift-XRT refined analysis
  51. GRB 090111: Swift detection of a burst
  52. GRB 090107B: Suzaku WAM observation of the prompt emission
  53. GRB090107B: Fermi GBM Detection
  54. GRB 090107B: ROTSE-III Optical Limits
  55. GRB 090107B: a long GRB localized by INTEGRAL
  56. Fermi/GBM detection of GRB 081226A
  57. GRB 081231: Fermi GBM Detection
  58. Konus-Wind observation of GRB 090102
  59. GRB081230: Swift-XRT refined analysis
  60. GRB 081230: ROTSE-III Detection of Optical Counterpart
  61. GRB 081230: Swift detection of a burst
  62. GRB 081228, Swift-BAT refined analysis
  63. GRB 081228: Swift-XRT Team refined analysis
  64. GRB 081228: Swift detection of a burst
  65. GRB 081226B: a short-hard GRB detected by INTEGRAL
  66. GRB 081226: ROTSE-III Optical Limits
  67. GRB 081226: Swift detection of a possible short-hard burst
  68. GRB 080810: optical observations
  69. GRB 081224: Fermi GBM Detection & LAT Localization
  70. Konus-Wind observation of GRB 081222
  71. GRB081222: Swift/UVOT further observations
  72. GRB 081222, Swift-BAT refined analysis
  73. GRB081222 optical limit by "Pi of the Sky"
  74. Konus-Wind observation of very bright GRB 081215A
  75. IPN triangulation of bright GRB 081215A
  76. Konus-Wind observation of GRB 081221
  77. GRB 081222: Swift detection of a burst with a bright optical afterglow
  78. GRB081215A: Fermi-LAT observations
  79. IPN localization of short hard GRB 081216
  80. GRB 081211B - possibly a short burst with extended emission
  81. GRB 081209: Fermi GBM detection
  82. GRB 081211: Swift detection of a burst
  83. GRB 081210: Swift-XRT refined analysis
  84. GRB 081210: Swift detection of a burst with optical afterglow
  85. Konus-Wind observation of GRB 081209
  86. IPN triangulation of short hard GRB 081209
  87. GRB 081206C: Fermi GBM detection
  88. Radio observation of GRB 081121 with ATCA
  89. Radio observation of GRB 081118 with ATCA
  90. GRB 081203B: Suzaku WAM observation of the prompt emission
  91. Radio observation of GRB 081109 with ATCA
  92. Radio observation of GRB 081104 with ATCA
  93. Radio observation of GRB 081029 with ATCA
  94. Radio observation of GRB 081008 with ATCA
  95. GRB081203A: Optical observations at Ishigaki
  96. GRB 081128: Optical afterglow observations
  97. GRB 081204: Swift XRT afterglow confirmation
  98. GRB081203A: MITSuME optical observation
  99. GRB 081203A: Skynet/GORT Detections
  100. GRB 081204 : a long GRB localized by INTEGRAL

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