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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"

28097 results found.

  1. GRB 101225A (Swift trigger 441015): optical upper limit
  2. Trigger 441015: Swift detection of a possible burst or transient
  3. GRB 101224A: NOT optical observation
  4. GRB 101224A: Pre-event imaging from DeepSky; Detection of a source in the XRT error circle
  5. GRB 101224A: Swift/UVOT Upper Limits
  6. GRB 101224A: Swift-XRT refined Analysis
  7. GRB101224A: MITSuME Okayama optical upper limits
  8. GRB 101224A, Swift-BAT refined analysis
  9. GRB 101224A - UVOT-enhanced XRT position
  10. GRB 101224A: Swift detection of a short burst
  11. GRB 101219A: Chandra Observations
  12. GRB 101219B: Swift/UVOT refined analysis
  13. GRB 101219B: Swift-XRT refined Analysis
  14. GRB 101219B: Enhanced Swift-XRT position
  15. GRB 101219A: MITSuME Ishigakijima Optical upper limits
  16. GRB 101219B: GROND Detection of the Optical/NIR Afterglow
  17. GRB 101219B: Fermi GBM observation
  18. GRB 101219A: IAC80 optical observations
  19. GRB 101219B: Swift-BAT refined analysis
  20. GRB 101219A: Swift-XRT refined Analysis
  21. GRB 101219B: Swift detection of a burst with an optical afterglow
  22. GRB 101219A: Swift/UVOT Upper Limits
  23. GRB 101219A: GROND Upper limits
  24. GRB 101219A: Magellan NIR observations
  25. GRB 101219A: Further Gemini-South Imaging
  26. GRB 101219A: Swift-BAT refined analysis
  27. GRB 101219A - NOT observation - upper limit
  28. GRB 101219A: SARA-N Upper Limit
  29. GRB 101219A: REM optical and NIR observations
  30. GRB 101219A: Swift detection of a short hard burst
  31. GRB 101213A : Suzaku WAM observation of the prompt emission
  32. Redshift solution(s) for GRB101213A from Swift-XRT data
  33. XRF 101117A, RIMOTS optical upper limits
  34. GRB 101213A: Fermi GBM observation
  35. GRB 101213A, Swift-BAT refined analysis
  36. GRB 101213A: Swift-XRT refined Analysis
  37. GRB 101213A: Swift/UVOT Upper Limits
  38. GRB 101213A: Enhanced Swift-XRT position
  39. GRB 101213: object within the X-ray error circle
  40. GRB 101213A: Swift detection of a burst
  41. GRB101204A: Swift/UVOT observations
  42. GRB 101204A: Swift-XRT refined Analysis
  43. GRB101204A GROND Detection of the Optical/NIR Afterglow
  44. GRB 101204A Afterglow Candidate, VATT Observations
  45. GRB 101129A : Suzaku WAM observation of the prompt emission
  46. GRB 101204A Swift-XRT/UVOT afterglow candidate
  47. Konus-Wind observation of GRB 101130A
  48. GRB101030A
  49. GRB 101201A: Fermi GBM observation
  50. GRB 101201A: Swift-XRT refined Analysis
  51. GRB 101201A: Swift/UVOT Detection
  52. GRB 101201A: GROND Detection of the Optical/NIR Afterglow
  53. GRB 101123A: ROTSE optical observations
  54. GRB 101123A: MASTER prompt optical observations
  55. GRB 101123A: Fermi GBM detection
  56. GRB 101117B: GROND Upper limits
  57. GRB 101117B: Swift/UVOT Observations of the Optical Afterglow
  58. GRB 101112A: OSN and BTA observations
  59. XRF 101117A: Palomar Transient Factory Observations
  60. GRB 101117B: Swift-XRT refined analysis
  61. GRB101114A: Swift/UVOT Upper Limits
  62. GRB 101117B: Swift-BAT refined analysis
  63. GRB 101117B: Enhanced Swift-XRT position
  64. GRB 101117B: Swift detection of a burst
  65. GRB 101114A: GROND Upper limits
  66. Konus-Wind observation of GRB 101114A
  67. Fermi GBM detection of a burst from a galactic source
  68. GRB 101114A: Swift-XRT candidate afterglow detection and analysis
  69. GRB 101114A, Swift-BAT GRB detected by ground processing
  70. GRB 101112A: Fermi GBM detection
  71. GRB 101112A: optical observations
  72. Konus-Wind observation of GRB 101112A
  73. GRB 101112A - XRT source detection/analysis
  74. GRB101112A: Liverpool Telescope Afterglow Candidate
  75. GRB 101112A: a long GRB detected by INTEGRAL
  76. GRB 090113, the review of the sky area in plate archives
  77. GRB 101030A : MOA optical observation
  78. GRB 101030A: GROND optical/NIR afterglow candidate
  79. GRB 101030A : Swift XRT refined analysis
  80. GRB 101030A: Swift/UVOT Upper Limits
  81. GRB 101030A: Swift-BAT refined analysis
  82. GRB 101030A: Enhanced Swift-XRT position
  83. GRB 101030A: Swift detection of a burst
  84. GRB 090111, the review of the sky area in plate archives (1976-1996)
  85. GRB 101024A: GROND optical/NIR observations
  86. GRB 101024A: Swift XRT refined analysis
  87. GRB 101024A: Zadko observatory - Gingin. Optical observations
  88. GRB 101024A: Fermi GBM observation
  89. GRB101024A: Swift/UVOT
  90. GRB 101024A: Swift-BAT refined analysis
  91. GRB 101024A: Enhanced Swift-XRT position
  92. Swift/UVOT observations of GRB101023A
  93. GRB 101024A: Swift detection of a burst with an optical afterglow
  94. GGRB 101023A: GROND detection of the optical-NIR afterglow
  95. GRB 101023A: Swift-XRT Team Refined Analysis
  96. GRB 101023A: Swift-BAT refined analysis
  97. GRB 101023A: Gemini discovery of optical afterglow
  98. GRB 101023A: Enhanced Swift-XRT position
  99. GRB 101023A: REM NIR observations
  100. GRB 101023A: Swift detection of a burst

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