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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"

23561 results found.

  1. GRB101114A: Swift/UVOT Upper Limits
  2. GRB 101114A: Confirmation of the X-ray afterglow
  3. GRB 101117B: Enhanced Swift-XRT position
  4. GRB 101117B: Swift detection of a burst
  5. GRB 101114A: GROND Upper limits
  6. Konus-Wind observation of GRB 101114A
  7. Fermi GBM detection of a burst from a galactic source
  8. GRB 101114A: Swift-XRT candidate afterglow detection and analysis
  9. Possible detection of INTEGRAL burst GRB 101112A by the EVLA
  10. GRB 101112A: optical observations
  11. GRB 101112A - XRT source detection/analysis
  12. GRB 101112A: BOOTES-2/TELMA optical afterglow candidate
  13. GRB 101030A : MOA optical observation
  14. GRB 101030A: GROND optical/NIR afterglow candidate
  15. GRB 101030A : Swift XRT refined analysis
  16. GRB 101030A: Swift/UVOT Upper Limits
  17. GRB 101030A: Enhanced Swift-XRT position
  18. GRB 101030A: Swift detection of a burst
  19. GRB 090111, the review of the sky area in plate archives (1976-1996)
  20. GRB 101024A: GROND optical/NIR observations
  21. GRB 101024A: Swift XRT refined analysis
  22. GRB 101024A: Zadko observatory - Gingin. Optical observations
  23. GRB101024A: Swift/UVOT
  24. GRB 101024A: Swift-BAT refined analysis
  25. GRB 101024A: Enhanced Swift-XRT position
  26. Swift/UVOT observations of GRB101023A
  27. GRB 101024A: Swift detection of a burst with an optical afterglow
  28. GGRB 101023A: GROND detection of the optical-NIR afterglow
  29. GRB 101023A: Swift-BAT refined analysis
  30. GRB 101023A: Gemini discovery of optical afterglow
  31. GRB 101023A: Enhanced Swift-XRT position
  32. GRB 101023A: REM NIR observations
  33. GRB 101023A: Swift detection of a burst
  34. GRB 101020A: BOOTES2 follow-up and limit
  35. GRB 101020A, Swift-BAT refined analysis
  36. GRB 101020A: Swift detection of a burst
  37. GRB 101017A: Swift XRT refined analysis
  38. GRB 101017A: Swift/UVOT Observations
  39. GRB 101008A: correction to the GCN 11352
  40. GRB 101008A: optical observations
  41. GRB101017A: MITSuME Okayama optical upper limits
  42. GRB 101014A: Fermi LAT detection
  43. GRB 101017A: Enhanced Swift-XRT position
  44. GRB 101017A: ROTSE-III Optical Limits
  45. GRB 101017A: Swift detection of a burst with optical counterpart
  46. GRB 101011A: BOOTES-3 Upper Limit
  47. GRB 101014A: Fermi GBM detection
  48. GRB 100906A: D50 optical detection
  49. GRB 100902A: D50 optical limit
  50. GRB 101011A: Swift/UVOT observations
  51. GRB 101011A, GROND upper limits
  52. GRB 101011A: Zadko observatory - Gingin optical observations
  53. GRB 101011A: Swift/UVOT Observations of a Possible Optical Afterglow
  54. GRB 101011A: Enhanced Swift-XRT position
  55. GRB 101011A: Swift detection of a burst
  56. GRB101008A, GROND detection of a fading afterglow
  57. GRB 101008A: Swift-XRT refined analysis
  58. GRB 101008A: SAO RAS optical observations
  59. GRB 100915 optical upper limit
  60. GRB 101008: Swift/UVOT Upper Limits
  61. GRB 101008A: Enhanced Swift-XRT position
  62. GRB 101008A: 1.23m CAHA optical observations
  63. GRB 101008A: Swift/XRT Detection of an Afterglow with no UVOT Counterpart
  64. GRB 101008A: Swift detection of a burst
  65. GRB 100728B: X-shooter redshift
  66. Refined analysis shows Swift Trigger 435520 is not a GRB
  67. Swift Trigger 435520 is probably not a GRB
  68. GRB 100928A: Swift detection of a burst
  69. GRB 100925A / MAXI J1659-152: WSRT Radio and Polarization Detection
  70. GRB100925A/MAXI J1659-152 MITSuME Ishigakijima and Okayama Optical Observation
  71. GRB 100925A / MAXI J1659-152: SARA-S Observations
  72. GRB 100925A/MAXI J1659-152: Submm observations from APEX
  73. GRB100925A/MAXI J1659-152: Galactic origin from SED analysis
  74. GRB 100925A/MAXI J1659-152 - NOT optical observations
  75. MAXI J1659-152: Swift-BAT refined analysis (triggers 434928 and 434931)
  76. GRB 100925A: Nearby DSS Source - SN-GRB or new Galactic transient?
  77. GRB 100924A: GROND detection of an optical/NIR afterglow
  78. GRB 100925A: Swift detection of a burst
  79. GRB 100924A: Swift detection of a burst
  80. GRB 100917A: TAROT La Silla observatory optical observations
  81. GRB 100915A: TAROT Calern observatory optical observations
  82. GRB100906A: Ashra-1 observation of early optical emission
  83. GRB 100916A: Fermi GBM detection
  84. GRB 100917A: Swift detection of a burst
  85. GRB100915A: MITSuME Ishigakijima Optical upper limits
  86. GRB 100915B: GRT Optical Observation
  87. GRB 100915A: GRT Optical Observation
  88. GRB 100915A: Swift/UVOT Upper Limits
  89. GRB 100915A: Swift-XRT refined analysis
  90. GRB 100915A: Enhanced Swift-XRT position
  91. GRB 100915A: Swift detection of a likely burst
  92. GRB 100910A: Fermi GBM detection
  93. Swift BAT Trigger 433953 probably not a GRB
  94. GRB100909A: MITSuME Ishigakijima Optical upper limits
  95. GRB 100909A: Swift/UVOT observations
  96. GRB 100901A: errata of GRB name in GCN 11270
  97. GRB 100909A: Swift-XRT refined analysis
  98. GRB 100906A: optical observations at Mt.Terskol
  99. GRB 100901A: optical observation in Maidanak, break confirmation
  100. GRB 100909A: Faulkes Telescope North afterglow candidate

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