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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"

28259 results found.

  1. GRB 101213: object within the X-ray error circle
  2. GRB 101213A: Swift detection of a burst
  3. GRB101204A: Swift/UVOT observations
  4. GRB 101204A: Swift-XRT refined Analysis
  5. GRB101204A GROND Detection of the Optical/NIR Afterglow
  6. GRB 101204A Afterglow Candidate, VATT Observations
  7. GRB 101129A : Suzaku WAM observation of the prompt emission
  8. GRB 101204A Swift-XRT/UVOT afterglow candidate
  9. Konus-Wind observation of GRB 101130A
  10. GRB101030A
  11. GRB 101201A: Fermi GBM observation
  12. GRB 101201A: Swift-XRT refined Analysis
  13. GRB 101201A: Swift/UVOT Detection
  14. GRB 101201A: GROND Detection of the Optical/NIR Afterglow
  15. GRB 101123A: ROTSE optical observations
  16. GRB 101123A: MASTER prompt optical observations
  17. GRB 101123A: Fermi GBM detection
  18. GRB 101117B: GROND Upper limits
  19. GRB 101117B: Swift/UVOT Observations of the Optical Afterglow
  20. GRB 101112A: OSN and BTA observations
  21. XRF 101117A: Palomar Transient Factory Observations
  22. GRB 101117B: Swift-XRT refined analysis
  23. GRB101114A: Swift/UVOT Upper Limits
  24. GRB 101117B: Swift-BAT refined analysis
  25. GRB 101117B: Enhanced Swift-XRT position
  26. GRB 101117B: Swift detection of a burst
  27. GRB 101114A: GROND Upper limits
  28. Konus-Wind observation of GRB 101114A
  29. Fermi GBM detection of a burst from a galactic source
  30. GRB 101114A: Swift-XRT candidate afterglow detection and analysis
  31. GRB 101114A, Swift-BAT GRB detected by ground processing
  32. GRB 101112A: Fermi GBM detection
  33. GRB 101112A: optical observations
  34. Konus-Wind observation of GRB 101112A
  35. GRB 101112A - XRT source detection/analysis
  36. GRB101112A: Liverpool Telescope Afterglow Candidate
  37. GRB 101112A: a long GRB detected by INTEGRAL
  38. GRB 090113, the review of the sky area in plate archives
  39. GRB 101030A : MOA optical observation
  40. GRB 101030A: GROND optical/NIR afterglow candidate
  41. GRB 101030A : Swift XRT refined analysis
  42. GRB 101030A: Swift/UVOT Upper Limits
  43. GRB 101030A: Swift-BAT refined analysis
  44. GRB 101030A: Enhanced Swift-XRT position
  45. GRB 101030A: Swift detection of a burst
  46. GRB 090111, the review of the sky area in plate archives (1976-1996)
  47. GRB 101024A: GROND optical/NIR observations
  48. GRB 101024A: Swift XRT refined analysis
  49. GRB 101024A: Zadko observatory - Gingin. Optical observations
  50. GRB 101024A: Fermi GBM observation
  51. GRB101024A: Swift/UVOT
  52. GRB 101024A: Swift-BAT refined analysis
  53. GRB 101024A: Enhanced Swift-XRT position
  54. Swift/UVOT observations of GRB101023A
  55. GRB 101024A: Swift detection of a burst with an optical afterglow
  56. GGRB 101023A: GROND detection of the optical-NIR afterglow
  57. GRB 101023A: Swift-XRT Team Refined Analysis
  58. GRB 101023A: Swift-BAT refined analysis
  59. GRB 101023A: Gemini discovery of optical afterglow
  60. GRB 101023A: Enhanced Swift-XRT position
  61. GRB 101023A: REM NIR observations
  62. GRB 101023A: Swift detection of a burst
  63. GRB 101020A, Swift-BAT refined analysis
  64. GRB 101017A: Swift XRT refined analysis
  65. GRB 101017A: Swift/UVOT Observations
  66. GRB 101008A: optical observations
  67. GRB101017A: MITSuME Okayama optical upper limits
  68. GRB 101017A: Enhanced Swift-XRT position
  69. GRB 101017A: Swift-BAT refined analysis
  70. GRB 101017A: Swift detection of a burst with optical counterpart
  71. GRB 101014A: Fermi GBM detection
  72. GRB 100906A: D50 optical detection
  73. GRB 100902A: D50 optical limit
  74. GRB 101011A: Swift/UVOT observations
  75. GRB 101011A, GROND upper limits
  76. GRB 101011A: Zadko observatory - Gingin optical observations
  77. GRB 101011A: XRT Refined Analysis
  78. GRB 101011A: Swift/UVOT Observations of a Possible Optical Afterglow
  79. GRB 101011A: Enhanced Swift-XRT position
  80. GRB 101011A: Swift-BAT refined analysis
  81. GRB 101011A: Swift detection of a burst
  82. GRB 101008A: Swift-BAT refined analysis
  83. GRB101008A, GROND detection of a fading afterglow
  84. GRB 101008A: Swift-XRT refined analysis
  85. GRB 101008A: SAO RAS optical observations
  86. GRB 100915 optical upper limit
  87. GRB 101008: Swift/UVOT Upper Limits
  88. GRB 101008A: Enhanced Swift-XRT position
  89. GRB 101008A: Swift/XRT Detection of an Afterglow with no UVOT Counterpart
  90. GRB 101008A: Swift detection of a burst
  91. Refined analysis shows Swift Trigger 435520 is not a GRB
  92. Swift Trigger 435520 is probably not a GRB
  93. GRB 100925A / MAXI J1659-152: MASTER optical observations
  94. GRB 100924A: Suzaku WAM observation of the prompt emission
  95. GRB 100928A, Swift-BAT refined analysis
  96. GRB 100924A: Fermi GBM observation
  97. GRB 100928A: Swift detection of a burst
  98. GRB100925A/MAXI J1659-152 MITSuME Ishigakijima and Okayama Optical Observation
  99. GRB 100925A / MAXI J1659-152: SARA-S Observations
  100. GRB 100925A/MAXI J1659-152: Submm observations from APEX

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