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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"

45719 results found.

  1. GRB 091018: Swift detection of a burst with optical afterglow
  2. Fwd: GRB 091003: Possible Supernova Component Retraction
  3. GRB 091003: Possible Supernova Component
  4. GRB 091003: Gemini-N redshift of possible host galaxy
  5. GRB 091010: optical obsevation
  6. GRB 091015: RTT150 optical observations
  7. GRB 090726 R band observations
  8. GRB 091010: optical afterglow candidate rejection
  9. GRB 091015: correction to GCN 10025
  10. GRB 090815: a faint long GRB localized by INTEGRAL
  11. GRB 091010: Swift-XRT refined analysis
  12. GRB 091010: Suzaku WAM observation of the prompt emission
  13. GRB 091010: AGILE-MCAL measurement and GRID upper limit
  14. Radio observation of GRB090927 with ATCA
  15. Radio observation of GRB090926a with ATCA
  16. Radio observation of GRB080916c with ATCA
  17. GRB 091010: Fermi GBM observation
  18. GRB 091010: Faulkes Telescope North observations
  19. GRB 090531A: Skynet/PROMPT Observations
  20. GRB 090530A: Skynet/DSO Detections
  21. GRB 091010: RXTE detection
  22. Konus-Wind observations of GRB 091010
  23. GRB 091010: Enhanced XRT position
  24. GRB 091010 optical upper limits
  25. Detection of a short GRB 090929A by RT-2 Experiment
  26. RT-2 observation of the bright GRB 090926A
  27. GRB 091010: GROND afterglow candidate
  28. GRB 091010: Swift/UVOT Upper Limits
  29. GRB 091010: Swift-XRT position
  30. SuperAGILE GRB is 091010 and not 090910
  31. GRB 090910: SuperAGILE Localization of a Long GRB
  32. GRB 090926A: Skynet/PROMPT Observations of Day 6 - 11 Fading
  33. GRB 090518: Skynet/PROMPT Observations
  34. Short-Duration GRB 090621: Skynet/Dolomiti Observations
  35. GRB 090904A: afterglow confirmation
  36. GRB 090812: Skynet/PROMPT and GORT Observations
  37. GRB 091003A: Suzaku WAM observation of the prompt emission
  38. GRB 091003: Lick observations and possible SDSS host galaxy
  39. GRB 090926B: Skynet/PROMPT Observations
  40. GRB 091003: WHT ACAM observations
  41. Konus-Wind observation of GRB 091003A
  42. GRB 090929B: Suzaku WAM observation of the prompt emission
  43. GRB 090929A: Suzaku WAM observation of the prompt emission
  44. GRB 091003: Swift-XRT confirmation of fading afterglow
  45. GRB 091003: Swift/UVOT Detection of an Optical Afterglow
  46. GRB 091003: Skynet/DSO Observations
  47. GRB 091003: UVOT-enhanced XRT position
  48. GRB 091003: Swift UVOT Detection of a Candidate UV Afterglow
  49. GRB 091003: Swift XRT analysis
  50. GRB 091003A: Fermi LAT detection
  51. GRB 090926A: Skynet/PROMPT Observations of Day 4 - 6 Fading Rate
  52. GRB 091003A: Fermi GBM detection
  53. GRB 090926A: Skynet/PROMPT Observations of Post-Peak Fading
  54. GRB 090929A: Swift/UVOT Observations
  55. GRB 090929A, Swift-BAT refined analysis
  56. GRB 090929B, Swift-BAT refined analysis
  57. Trigger 371210: Swift/BAT Triggered on IGR J17511-3057
  58. GRB 090929A: Swift-XRT non-detection
  59. Konus-Wind observation of GRB 090929A
  60. Konus-Wind observation of GRB 090929B
  61. GRB 090927: Fermi GBM observation
  62. GRB 090929B: Swift-XRT refined analysis
  63. GRB 090926A: Fermi LAT and GBM refined analysis
  64. GRB 090929B: Gemini-N upper limits
  65. GRB 090929B: Skynet/DSO Observations
  66. GRB 090929B: Swift/UVOT Observations
  67. Konus-RF observation of GRB 090929A
  68. GRB 090929B: RAPTOR Discovery of Optical Counterpart
  69. GRB 090929A BAT location of the Fermi GBM burst
  70. Correction: GRB 090929B: Enhanced Swift-XRT position
  71. GRB 090929: Enhanced Swift-XRT position
  72. GRB 090929B: Swift detection of a burst
  73. GRB 090929A: Fermi GBM detection
  74. GRB090926A: Swift-XRT refined analysis
  75. GRB 090927: Faulkes Telescope South Detection of the Optical Afterglow
  76. Konus-Wind and Konus-RF observations of GRB 090926A
  77. GRB 090927: VLT redshift
  78. GRB 090926B: Fermi GBM detection
  79. GRB 090927: Zadko Telescope observations
  80. GRB 090927, Swift-BAT refined analysis of the possibly short burst
  81. Swift/UVOT observations of GRB 090927
  82. GRB 090926A: Skynet/PROMPT Continued Observations
  83. GRB 090927: Swift XRT refined analysis
  84. GRB 090926A: Suzaku WAM observation of the prompt emission
  85. GRB 090927: Enhanced Swift-XRT position
  86. GRB090926B: Swift/UVOT Upper Limits
  87. GRB090926A: Swift/UVOT observations
  88. GRB 090926B: VLT spectroscopy
  89. GRB 090927: Swift/UVOT detection of an optical afterglow
  90. GRB 090927: Swift detection of a short burst
  91. GRB 090926B: optical object in error circle
  92. GRB 090926B: MAXI GSC detection
  93. GRB 090926A: VLT/X-shooter redshift
  94. GRB 090926B: NOT optical observation
  95. GRB 090926B: Swift XRT refined analysis
  96. GRB 090926B: Swift-BAT refined analysis
  97. GRB 090926A: Swift/UVOT detection of an optical afterglow
  98. GRB 090926A: Skynet/PROMPT Discovery of the Optical Afterglow
  99. GRB090926A: UVOT-enhanced XRT position
  100. GRB 090926B: Swift detection of a burst

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