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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"

42834 results found.

  1. GRB 101117B: Swift/UVOT Observations of the Optical Afterglow
  2. GRB 101112A: OSN and BTA observations
  3. XRF 101117A: Palomar Transient Factory Observations
  4. GRB 101117B: Swift-XRT refined analysis
  5. GRB 101114A: Confirmation of the X-ray afterglow
  6. GRB 101117B: Swift-BAT refined analysis
  7. GRB 101117B: Enhanced Swift-XRT position
  8. GRB 101117B: Swift detection of a burst
  9. XRF101117A: MAXI/GSC detection of a short X-ray transient
  10. GRB 101114A: GROND Upper limits
  11. Konus-Wind observation of GRB 101114A
  12. Fermi GBM detection of a burst from a galactic source
  13. GRB 101114A: Swift-XRT candidate afterglow detection and analysis
  14. GRB 101114A, Swift-BAT GRB detected by ground processing
  15. Possible detection of INTEGRAL burst GRB 101112A by the EVLA
  16. GRB 101112A: Fermi GBM detection
  17. GRB 101112A: optical observations
  18. GRB 10112A: MASTER optical observations
  19. Konus-Wind observation of GRB 101112A
  20. GRB 101112A - XRT source detection/analysis
  21. GRB 101112A: BOOTES-2/TELMA optical afterglow candidate
  22. GRB101112A: Liverpool Telescope Afterglow Candidate
  23. GRB 101112A: a long GRB detected by INTEGRAL
  24. GRB 100906A: optical observations
  25. GRB 101030A : MOA optical observation
  26. GRB 101030A: GROND optical/NIR afterglow candidate
  27. GRB 101030A : Swift XRT refined analysis
  28. GRB 101030A: Swift/UVOT Upper Limits
  29. GRB 101030A: Swift-BAT refined analysis
  30. GRB 101030A: Enhanced Swift-XRT position
  31. GRB 101030A: Swift detection of a burst
  32. Konus-Wind observation of GRB 101023A
  33. GRB 101024A: GROND optical/NIR observations
  34. GRB 101024A: Zadko observatory - Gingin. Optical observations refined analysis
  35. GRB 101024A: Swift XRT refined analysis
  36. GRB 101024A: Zadko observatory - Gingin. Optical observations
  37. GRB 101024A: Fermi GBM observation
  38. GRB 101023A: Fermi GBM observation
  39. GRB 101024A: Swift-BAT refined analysis
  40. GRB 101024A: GRAS06 optical observations
  41. GRB 101024A: Enhanced Swift-XRT position
  42. Swift/UVOT observations of GRB101023A
  43. GRB 101024A: Swift detection of a burst with an optical afterglow
  44. GGRB 101023A: GROND detection of the optical-NIR afterglow
  45. GRB 101023A: Swift-XRT Team Refined Analysis
  46. GRB 101023A: Swift-BAT refined analysis
  47. GRB 101023A: Gemini discovery of optical afterglow
  48. GRB 101023A: Enhanced Swift-XRT position
  49. GRB 101023A: REM NIR observations
  50. GRB 101023A: Swift detection of a burst
  51. GRB 101020A: MASTER prompt and afterglow limit
  52. GRB 101020A: BOOTES2 follow-up and limit
  53. GRB 101020A: MASTER polarization optical observations
  54. GRB 101020A, Swift-BAT refined analysis
  55. GRB 101020A: Swift detection of a burst
  56. GRB 101017A: Swift XRT refined analysis
  57. GRB 101017A: Swift/UVOT Observations
  58. GRB 101008A: correction to the GCN 11352
  59. GRB 101008A: optical observations
  60. Konus-Wind observation of GRB 101017A
  61. GRB 101014A: Fermi LAT detection
  62. GRB 101017A: Enhanced Swift-XRT position
  63. GRB 101017A: Swift-BAT refined analysis
  64. GRB 101017A: Swift detection of a burst with optical counterpart
  65. GRB 101011A: Fermi GBM detection
  66. GRB 101011A: BOOTES-3 Upper Limit
  67. Konus-Wind observation of GRB 101014A
  68. GRB 101014A: Fermi GBM detection
  69. GRB 100906A: D50 optical detection
  70. GRB 100902A: D50 optical limit
  71. GRB 101011A: Swift/UVOT observations
  72. GRB 101011A, GROND upper limits
  73. GRB 101011A: Zadko observatory - Gingin optical observations
  74. GRB 101011A: XRT Refined Analysis
  75. GRB 101011A: Swift/UVOT Observations of a Possible Optical Afterglow
  76. GRB 101011A: Enhanced Swift-XRT position
  77. GRB 101011A: Swift-BAT refined analysis
  78. GRB 101011A: Swift detection of a burst
  79. GRB 101008A: Fermi GBM observation
  80. GRB 101008A: MASTER prompt optical observations
  81. GRB 101008A: Swift-BAT refined analysis
  82. GRB101008A, GROND detection of a fading afterglow
  83. GRB 101008A: Swift-XRT refined analysis
  84. GRB 101008A: SAO RAS optical observations
  85. GRB 100915 optical upper limit
  86. GRB 101008A: Enhanced Swift-XRT position
  87. GRB 101008A: 1.23m CAHA optical observations
  88. GRB 101008A: Swift/XRT Detection of an Afterglow with no UVOT Counterpart
  89. GRB 101008A: Swift detection of a burst
  90. GRB 100728B: X-shooter redshift
  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. GRB 100925A / MAXI J1659-152: WSRT Radio and Polarization Detection
  99. GRB 100925A / MAXI J1659-152: Optical observation with the Kottamia 188cm telescope
  100. GRB100925A/MAXI J1659-152: X-shooter identification as an X-ray binary

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