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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"

28232 results found.

  1. Konus-Wind observation of GRB 101114A
  2. Fermi GBM detection of a burst from a galactic source
  3. GRB 101114A: Swift-XRT candidate afterglow detection and analysis
  4. GRB 101114A, Swift-BAT GRB detected by ground processing
  5. GRB 101112A: Fermi GBM detection
  6. GRB 101112A: optical observations
  7. Konus-Wind observation of GRB 101112A
  8. GRB 101112A - XRT source detection/analysis
  9. GRB101112A: Liverpool Telescope Afterglow Candidate
  10. GRB 101112A: a long GRB detected by INTEGRAL
  11. GRB 090113, the review of the sky area in plate archives
  12. GRB 101030A : MOA optical observation
  13. GRB 101030A: GROND optical/NIR afterglow candidate
  14. GRB 101030A : Swift XRT refined analysis
  15. GRB 101030A: Swift/UVOT Upper Limits
  16. GRB 101030A: Swift-BAT refined analysis
  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. GRB 101024A: Fermi GBM observation
  24. GRB101024A: Swift/UVOT
  25. GRB 101024A: Swift-BAT refined analysis
  26. GRB 101024A: Enhanced Swift-XRT position
  27. Swift/UVOT observations of GRB101023A
  28. GRB 101024A: Swift detection of a burst with an optical afterglow
  29. GGRB 101023A: GROND detection of the optical-NIR afterglow
  30. GRB 101023A: Swift-XRT Team Refined Analysis
  31. GRB 101023A: Swift-BAT refined analysis
  32. GRB 101023A: Gemini discovery of optical afterglow
  33. GRB 101023A: Enhanced Swift-XRT position
  34. GRB 101023A: REM NIR observations
  35. GRB 101023A: Swift detection of a burst
  36. GRB 101020A, Swift-BAT refined analysis
  37. GRB 101017A: Swift XRT refined analysis
  38. GRB 101017A: Swift/UVOT Observations
  39. GRB 101008A: optical observations
  40. GRB101017A: MITSuME Okayama optical upper limits
  41. GRB 101017A: Enhanced Swift-XRT position
  42. GRB 101017A: Swift-BAT refined analysis
  43. GRB 101017A: Swift detection of a burst with optical counterpart
  44. GRB 101014A: Fermi GBM detection
  45. GRB 100906A: D50 optical detection
  46. GRB 100902A: D50 optical limit
  47. GRB 101011A: Swift/UVOT observations
  48. GRB 101011A, GROND upper limits
  49. GRB 101011A: Zadko observatory - Gingin optical observations
  50. GRB 101011A: XRT Refined Analysis
  51. GRB 101011A: Swift/UVOT Observations of a Possible Optical Afterglow
  52. GRB 101011A: Enhanced Swift-XRT position
  53. GRB 101011A: Swift-BAT refined analysis
  54. GRB 101011A: Swift detection of a burst
  55. GRB 101008A: Swift-BAT refined analysis
  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: Swift/XRT Detection of an Afterglow with no UVOT Counterpart
  63. GRB 101008A: Swift detection of a burst
  64. Refined analysis shows Swift Trigger 435520 is not a GRB
  65. Swift Trigger 435520 is probably not a GRB
  66. GRB 100925A / MAXI J1659-152: MASTER optical observations
  67. GRB 100924A: Suzaku WAM observation of the prompt emission
  68. GRB 100928A, Swift-BAT refined analysis
  69. GRB 100924A: Fermi GBM observation
  70. GRB 100928A: Swift detection of a burst
  71. GRB100925A/MAXI J1659-152 MITSuME Ishigakijima and Okayama Optical Observation
  72. GRB 100925A / MAXI J1659-152: SARA-S Observations
  73. GRB 100925A/MAXI J1659-152: Submm observations from APEX
  74. GRB100925A/MAXI J1659-152: Galactic origin from SED analysis
  75. GRB 100925A/MAXI J1659-152 - NOT optical observations
  76. GRB 100925A / MAXI J1659-152: BOOTES-2/TELMA and IAC80 optical observations
  77. GRB 100925A: Nearby DSS Source - SN-GRB or new Galactic transient?
  78. GRB100925A UVOT afterglow
  79. GRB 100924A: GROND detection of an optical/NIR afterglow
  80. GRB 100925A: Swift detection of a burst
  81. GRB 100924A: Swift-BAT refined analysis
  82. GRB 100917A: TAROT La Silla observatory optical observations
  83. GRB 100915A: TAROT Calern observatory optical observations
  84. GRB100906A: Ashra-1 observation of early optical emission
  85. GRB 100916A: Fermi GBM detection
  86. GRB 100917A: Swift-BAT refined analysis
  87. GRB 100917A: Swift detection of a burst
  88. GRB100915A: MITSuME Ishigakijima Optical upper limits
  89. GRB 100915B: GRT Optical Observation
  90. GRB 100915A: GRT Optical Observation
  91. GRB 100915B: Fermi GBM observation
  92. GRB 100915A: Correction to Swift-BAT refined analysis
  93. GRB 100915A: Swift/UVOT Upper Limits
  94. GRB 100915A: Swift-BAT refined analysis
  95. GRB 100915A: Swift-XRT refined analysis
  96. GRB 100915A: Enhanced Swift-XRT position
  97. GRB 100915B: a long GRB detected by INTEGRAL
  98. GRB 100915A: Swift detection of a likely burst
  99. GRB 100910A: Fermi GBM detection
  100. Swift BAT Trigger 433953 probably not a GRB

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