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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"

3044 results found.

  1. GRB 100625A: Swift detection of a short hard burst
  2. Konus-Wind observation of GRB 100621A
  3. Trigger 424161: Swift/BAT trigger on XTE J1946+274/GRO J1944+26
  4. GRB 100513A: CrAO optical observations
  5. GRB 100514A: Faulkes Telescope South observations
  6. GRB 100510A: MAXI/GSC detection
  7. GRB 100420A: Gemini discovery of infrared afterglow
  8. Konus-Wind observation of GRB 100423A
  9. GRB 100424A: CrAO optical observations
  10. GRB 100424A: Gemini/NIRI Candidate Afterglow
  11. GRB 100415A: MAXI/GSC detection of a probable GRB
  12. GRB 100413A: SARA upper limit
  13. Konus-Wind observation of GRB 100324B
  14. GRB 100322A: Suzaku WAM observation of the prompt emission
  15. Swift-BAT refined analysis of the probable new SGR 1833-0832
  16. GRB 100316C: Swift detection of a burst
  17. GRB 100213B: Swift-BAT refined analysis
  18. GRB 100205A: Swift detection of a burst
  19. Konus-Wind observation of GRB 100103A
  20. GRB091208B: Swift/UVOT refined analysis
  21. GRB 091208B: MITSuME Okayama Optical Observation
  22. GRB 091208B: Swift detection of a burst with an optical afterglow
  23. GRB 091208B: BOOTES-3 optical afterglow
  24. GRB 091208: ROTSE-III Optical Limits
  25. Short X-ray Transient Detection by MAXI/GSC
  26. Konus-Wind observation of GRB 091127
  27. GRB 091127: Swift-XRT afterglow detection and analysis
  28. GRB 091127: TAROT La Silla observatory optical decay
  29. GRB 091127: Swift/UVOT observations
  30. GRB 091127: CAHA 1.23m I-band observations
  31. GRB 091127: REM NIR afterglow detection
  32. GRB 091127: Swift/UVOT Detection of an Optical Afterglow
  33. GRB 091127: Liverpool Telescope afterglow candidate
  34. GRB 091127: Swift detection of a burst
  35. IPN Triangulation of GRB091120
  36. GRB 091109: Swift detection of a burst with optical afterglow
  37. GRB 091029: Observations from Stardome Observatory
  38. GRB091102 : MOA optical upper limit
  39. GRB 091018, SMARTS optical/IR afterglow observations
  40. GRB091029: Swift/UVOT observations
  41. GRB 091029: Swift-BAT refined analysis
  42. GRB 091029: Enhanced Swift-XRT position
  43. GRB 091029: GROND Detection of the Optical/NIR Afterglow
  44. GRB 091029: Swift detection of a burst with an optical counterpart
  45. GRB 091018: miniTAO/ANIR Observations
  46. GRB 091018: Swift-BAT refined analysis
  47. GRB 091018: ROTSE-III Detection of Optical Counterpart
  48. GRB 091018: Swift detection of a burst with optical afterglow
  49. GRB 090929A, Swift-BAT refined analysis
  50. Trigger 371210: Swift/BAT Triggered on IGR J17511-3057
  51. GRB 090929A BAT location of the Fermi GBM burst
  52. GRB 090926B: Swift-BAT refined analysis
  53. GRB 090926B: Swift detection of a burst
  54. GRB 090912, Swift-BAT refined analysis
  55. GRB 090912 optical upper limit
  56. GRB 090831A: Suzaku WAM observation of the prompt emission
  57. GRB090829: Fermi GBM Detection
  58. Konus-Wind observations of GRB 090827
  59. GRB 090812: Konus-Wind and Swift/BAT joint spectral analysis
  60. GRB 090813: CrAO optical obsevations
  61. GRB 090814B: Liverpool Telescope Observations
  62. GRB 090814: Swift detection of a burst
  63. GRB 090807B: Fermi GBM detection
  64. IPN Triangulation and Konus-Wind observaions of GRB090727B
  65. GRB 090727: GRT Optical Observation
  66. IPN Triangulation of bright GRB 090720B
  67. GRB 090715B: MASTER optical limit
  68. Konus-Wind and Konus-RF observations of GRB 090715B
  69. GRB 090709A: P60 Observations
  70. GRB 090618, Swift-BAT refined spectral analysis
  71. GRB 090530: RTT150 Optical Observation
  72. GRB090529B: ROVOR Upper Limits
  73. GRB 090531: Swift-BAT refined analysis
  74. GRB 090530: break in light curve
  75. GRB 090530: NOT optical observations
  76. GRB090530: Swift/UVOT afterglow detection
  77. GRB 090530A: ROTSE-III Detection of Optical Counterpart
  78. GRB 090530: Swift detection of a burst with an optical counterpart
  79. GRB 090520B: Fermi GBM detection
  80. GRB 090519, Swift-BAT refined analysis
  81. GRB 090515: Lick Upper Limits
  82. GRB 090515: Swift-BAT refined spectral analysis
  83. Fermi Gamma-ray Burst Monitor trigger 263649437 is not a GRB
  84. GRB 090424: optical observations
  85. GRB 090418A BVRcIc field calibration
  86. GRB 090429B: Swift-BAT refined analysis
  87. GRB 090424: Continued R-band monitoring
  88. GRB 090425: Fermi GBM detection
  89. GRB 090426, RIMOTS optical upper limits
  90. GRB 090426: Swift detection of a burst with an optical counterpart
  91. GRB090424: BVRI/R-band detection after 15 hrs burst
  92. GRB 090424: Swift-BAT refined analysis
  93. GRB090418A Rc-band photometry
  94. GRB 090423: Swift-BAT refined analysis
  95. GRB 090423: Faulkes Telescope South observations
  96. GRB 090418A: Konus-Wind and Swift/BAT joint spectral analysis
  97. GRB 090418A: optical observations
  98. GRB 090418A: Swift/UVOT Observations
  99. VLA radio detection of GRB 090418
  100. GRB 090418: Swift detection of a burst with optical afterglow

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