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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"

28280 results found.

  1. GRB 101219A: IAC80 optical observations
  2. GRB 101219B: Swift-BAT refined analysis
  3. GRB 101219A: Swift-XRT refined Analysis
  4. GRB 101219B: Swift detection of a burst with an optical afterglow
  5. GRB 101219A: Swift/UVOT Upper Limits
  6. GRB 101219A: GROND Upper limits
  7. GRB 101219A: Magellan NIR observations
  8. GRB 101219A: Further Gemini-South Imaging
  9. GRB 101219A: Swift-BAT refined analysis
  10. GRB 101219A - NOT observation - upper limit
  11. GRB 101219A: SARA-N Upper Limit
  12. GRB 101219A: REM optical and NIR observations
  13. GRB 101219A: Swift detection of a short hard burst
  14. GRB 101213A : Suzaku WAM observation of the prompt emission
  15. Redshift solution(s) for GRB101213A from Swift-XRT data
  16. XRF 101117A, RIMOTS optical upper limits
  17. GRB 101213A: Fermi GBM observation
  18. GRB 101213A, Swift-BAT refined analysis
  19. GRB 101213A: Swift-XRT refined Analysis
  20. GRB 101213A: Swift/UVOT Upper Limits
  21. GRB 101213A: Enhanced Swift-XRT position
  22. GRB 101213: object within the X-ray error circle
  23. GRB 101213A: Swift detection of a burst
  24. GRB101204A: Swift/UVOT observations
  25. GRB 101204A: Swift-XRT refined Analysis
  26. GRB101204A GROND Detection of the Optical/NIR Afterglow
  27. GRB 101204A Afterglow Candidate, VATT Observations
  28. GRB 101129A : Suzaku WAM observation of the prompt emission
  29. GRB 101204A Swift-XRT/UVOT afterglow candidate
  30. Konus-Wind observation of GRB 101130A
  31. GRB101030A
  32. GRB 101201A: Fermi GBM observation
  33. GRB 101201A: Swift-XRT refined Analysis
  34. GRB 101201A: Swift/UVOT Detection
  35. GRB 101201A: GROND Detection of the Optical/NIR Afterglow
  36. GRB 101123A: ROTSE optical observations
  37. GRB 101123A: MASTER prompt optical observations
  38. GRB 101123A: Fermi GBM detection
  39. GRB 101117B: GROND Upper limits
  40. GRB 101117B: Swift/UVOT Observations of the Optical Afterglow
  41. GRB 101112A: OSN and BTA observations
  42. XRF 101117A: Palomar Transient Factory Observations
  43. GRB 101117B: Swift-XRT refined analysis
  44. GRB101114A: Swift/UVOT Upper Limits
  45. GRB 101117B: Swift-BAT refined analysis
  46. GRB 101117B: Enhanced Swift-XRT position
  47. GRB 101117B: Swift detection of a burst
  48. GRB 101114A: GROND Upper limits
  49. Konus-Wind observation of GRB 101114A
  50. Fermi GBM detection of a burst from a galactic source
  51. GRB 101114A: Swift-XRT candidate afterglow detection and analysis
  52. GRB 101114A, Swift-BAT GRB detected by ground processing
  53. GRB 101112A: Fermi GBM detection
  54. GRB 101112A: optical observations
  55. Konus-Wind observation of GRB 101112A
  56. GRB 101112A - XRT source detection/analysis
  57. GRB101112A: Liverpool Telescope Afterglow Candidate
  58. GRB 101112A: a long GRB detected by INTEGRAL
  59. GRB 090113, the review of the sky area in plate archives
  60. GRB 101030A : MOA optical observation
  61. GRB 101030A: GROND optical/NIR afterglow candidate
  62. GRB 101030A : Swift XRT refined analysis
  63. GRB 101030A: Swift/UVOT Upper Limits
  64. GRB 101030A: Swift-BAT refined analysis
  65. GRB 101030A: Enhanced Swift-XRT position
  66. GRB 101030A: Swift detection of a burst
  67. GRB 090111, the review of the sky area in plate archives (1976-1996)
  68. GRB 101024A: GROND optical/NIR observations
  69. GRB 101024A: Swift XRT refined analysis
  70. GRB 101024A: Zadko observatory - Gingin. Optical observations
  71. GRB 101024A: Fermi GBM observation
  72. GRB101024A: Swift/UVOT
  73. GRB 101024A: Swift-BAT refined analysis
  74. GRB 101024A: Enhanced Swift-XRT position
  75. Swift/UVOT observations of GRB101023A
  76. GRB 101024A: Swift detection of a burst with an optical afterglow
  77. GGRB 101023A: GROND detection of the optical-NIR afterglow
  78. GRB 101023A: Swift-XRT Team Refined Analysis
  79. GRB 101023A: Swift-BAT refined analysis
  80. GRB 101023A: Gemini discovery of optical afterglow
  81. GRB 101023A: Enhanced Swift-XRT position
  82. GRB 101023A: REM NIR observations
  83. GRB 101023A: Swift detection of a burst
  84. GRB 101020A, Swift-BAT refined analysis
  85. GRB 101017A: Swift XRT refined analysis
  86. GRB 101017A: Swift/UVOT Observations
  87. GRB 101008A: optical observations
  88. GRB101017A: MITSuME Okayama optical upper limits
  89. GRB 101017A: Enhanced Swift-XRT position
  90. GRB 101017A: Swift-BAT refined analysis
  91. GRB 101017A: Swift detection of a burst with optical counterpart
  92. GRB 101014A: Fermi GBM detection
  93. GRB 100906A: D50 optical detection
  94. GRB 100902A: D50 optical limit
  95. GRB 101011A: Swift/UVOT observations
  96. GRB 101011A, GROND upper limits
  97. GRB 101011A: Zadko observatory - Gingin optical observations
  98. GRB 101011A: XRT Refined Analysis
  99. GRB 101011A: Swift/UVOT Observations of a Possible Optical Afterglow
  100. GRB 101011A: Enhanced Swift-XRT position

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