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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"

19644 results found.

  1. GRB 101204A: Swift-XRT refined Analysis
  2. GRB101204A GROND Detection of the Optical/NIR Afterglow
  3. GRB 101204A Afterglow Candidate, VATT Observations
  4. GRB 101129A : Suzaku WAM observation of the prompt emission
  5. GRB 101204A Swift-XRT/UVOT afterglow candidate
  6. GRB 101204A detected in ground analysis of BAT data
  7. GRB 101129A SHB found by IPN and in ground analysis of BAT data
  8. GRB 101201A: Fermi GBM observation
  9. GRB 101201A: Swift-XRT refined Analysis
  10. GRB 101201A: Swift/UVOT Detection
  11. GRB 101201A: GROND Detection of the Optical/NIR Afterglow
  12. GRB 101201A detected in ground analysis of BAT data
  13. Swift detection of MAXIJ1409-619
  14. IPN triangulation of bright GRB 101123A
  15. Optical observation of GRB 101024A
  16. GRB 101117B: GROND Upper limits
  17. GRB 101117B: Swift/UVOT Observations of the Optical Afterglow
  18. GRB 101117B: Swift-XRT refined analysis
  19. GRB101114A: Swift/UVOT Upper Limits
  20. GRB 101114A: Confirmation of the X-ray afterglow
  21. GRB 101117B: Swift-BAT refined analysis
  22. GRB 101117B: Enhanced Swift-XRT position
  23. GRB 101117B: Swift/UVOT Discovery of an Optical Afterglow
  24. GRB 101117B: Swift detection of a burst
  25. GRB 101114A: GROND Upper limits
  26. GRB 101114A: Swift-XRT candidate afterglow detection and analysis
  27. GRB 101114A, Swift-BAT GRB detected by ground processing
  28. GRB 101112A - XRT source detection/analysis
  29. GRB 101030A : MOA optical observation
  30. GRB 101030A : Swift XRT refined analysis
  31. GRB 101030A: Swift/UVOT Upper Limits
  32. GRB 101030A: Swift-BAT refined analysis
  33. GRB 101030A: Enhanced Swift-XRT position
  34. GRB 101030A: Swift detection of a burst
  35. Konus-Wind observation of GRB 101023A
  36. GRB 101024A: Swift XRT refined analysis
  37. GRB 101024A: Zadko observatory - Gingin. Optical observations
  38. GRB 101024A: Fermi GBM observation
  39. GRB 101023A: Fermi GBM observation
  40. GRB101024A: Swift/UVOT
  41. GRB 101024A: Swift-BAT refined analysis
  42. GRB 101024A: Enhanced Swift-XRT position
  43. Swift/UVOT observations of GRB101023A
  44. GRB 101024A: Swift detection of a burst with an optical afterglow
  45. GGRB 101023A: GROND detection of the optical-NIR afterglow
  46. GRB 101023A: Swift-XRT Team Refined Analysis
  47. GRB 101023A: Swift-BAT refined analysis
  48. GRB 101023A: Enhanced Swift-XRT position
  49. GRB 101023A: Swift detection of a burst
  50. GRB 101020A: MASTER prompt and afterglow limit
  51. GRB 101020A: MASTER polarization optical observations
  52. GRB 101020A, Swift-BAT refined analysis
  53. GRB 101020A: Swift detection of a burst
  54. GRB 101017A: Swift XRT refined analysis
  55. GRB 101017A: Swift/UVOT Observations
  56. GRB 101008A: optical observations
  57. Konus-Wind observation of GRB 101017A
  58. GRB 101017A: Enhanced Swift-XRT position
  59. GRB 101017A: Swift-BAT refined analysis
  60. GRB 101017A: ROTSE-III Optical Limits
  61. GRB 101017A: Swift detection of a burst with optical counterpart
  62. GRB 101011A: Fermi GBM detection
  63. GRB 101011A: BOOTES-3 Upper Limit
  64. GRB 100906A: D50 optical detection
  65. GRB 100902A: D50 optical limit
  66. GRB 101011A: Swift/UVOT observations
  67. GRB 101011A, GROND upper limits
  68. GRB 101011A: Zadko observatory - Gingin optical observations
  69. GRB 101011A: XRT Refined Analysis
  70. GRB 101011A: Swift/UVOT Observations of a Possible Optical Afterglow
  71. GRB 101011A: Enhanced Swift-XRT position
  72. GRB 101011A: Swift-BAT refined analysis
  73. GRB 101011A: Swift detection of a burst
  74. GRB 101008A: Fermi GBM observation
  75. GRB 101008A: MASTER prompt optical observations
  76. GRB 101008A: Swift-BAT refined analysis
  77. GRB101008A, GROND detection of a fading afterglow
  78. GRB 101008A: Swift-XRT refined analysis
  79. GRB 100915 optical upper limit
  80. GRB 101008: Swift/UVOT Upper Limits
  81. GRB 101008A: Enhanced Swift-XRT position
  82. GRB 101008A: 1.23m CAHA optical observations
  83. GRB 101008A: Swift/XRT Detection of an Afterglow with no UVOT Counterpart
  84. GRB 101008A: Swift detection of a burst
  85. Refined analysis shows Swift Trigger 435520 is not a GRB
  86. Swift Trigger 435520 is probably not a GRB
  87. GRB 100924A: Suzaku WAM observation of the prompt emission
  88. GRB 100928A, Swift-BAT refined analysis
  89. GRB 100924A: Fermi GBM observation
  90. GRB 100928A: Swift detection of a burst
  91. GRB 100925A / MAXI J1659-152: WSRT Radio and Polarization Detection
  92. GRB100925A/MAXI J1659-152: Galactic origin from SED analysis
  93. GRB 100925A / MAXI J1659-152: BOOTES-2/TELMA and IAC80 optical observations
  94. MAXI J1659-152: Swift-BAT refined analysis (triggers 434928 and 434931)
  95. GRB 100925A: Nearby DSS Source - SN-GRB or new Galactic transient?
  96. GRB100925A UVOT afterglow
  97. GRB 100924A: GROND detection of an optical/NIR afterglow
  98. GRB 100925A: Swift detection of a burst
  99. GRB 100924A: Swift-BAT refined analysis
  100. GRB 100924A: Swift detection of a burst

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