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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"

36334 results found.

  1. GRB 101224A - UVOT-enhanced XRT position
  2. GRB 101224A: Swift detection of a short burst
  3. GRB 101219A: Chandra Observations
  4. GRB 101219B: Swift/UVOT refined analysis
  5. GRB 101219B: Swift-XRT refined Analysis
  6. GRB 101219B: Enhanced Swift-XRT position
  7. GRB 101219A: MITSuME Ishigakijima Optical upper limits
  8. GRB 101219B: GROND Detection of the Optical/NIR Afterglow
  9. GRB 101219B: Fermi GBM observation
  10. GRB 101219A: IAC80 optical observations
  11. GRB 101219B: Swift-BAT refined analysis
  12. GRB 101219A: Swift-XRT refined Analysis
  13. GRB 101219B: Swift detection of a burst with an optical afterglow
  14. GRB 101219A: Swift/UVOT Upper Limits
  15. GRB 101219A: GROND Upper limits
  16. Konus-Wind observation of short hard GRB 101219A
  17. GRB 101219A: Magellan NIR observations
  18. GRB 101219A: Further Gemini-South Imaging
  19. GRB 101219A: Swift-BAT refined analysis
  20. GRB 101219A - NOT observation - upper limit
  21. GRB 101219A: SARA-N Upper Limit
  22. GRB 101219A: Gemini-South observations
  23. GRB 101219A: REM optical and NIR observations
  24. GRB 101219A: ROTSE-III Optical Limits
  25. GRB 101219A: Swift detection of a short hard burst
  26. Request for Supernova related data for GRB 101023A
  27. GRB 101213A : Suzaku WAM observation of the prompt emission
  28. Redshift solution(s) for GRB101213A from Swift-XRT data
  29. Konus-Wind observation of GRB 101213A
  30. GRB 101213A: Fermi GBM observation
  31. GRB 101213A, Swift-BAT refined analysis
  32. GRB 101213A: Swift-XRT refined Analysis
  33. GRB 101213A: Swift/UVOT Upper Limits
  34. GRB 101213A: Enhanced Swift-XRT position
  35. GRB 101213: object within the X-ray error circle
  36. GRB 101213A: Swift detection of a burst
  37. GRB101204A: Swift/UVOT observations
  38. GRB 101204A: Swift-XRT refined Analysis
  39. GRB101204A GROND Detection of the Optical/NIR Afterglow
  40. GRB 101204A Afterglow Candidate, VATT Observations
  41. GRB 101129A : Suzaku WAM observation of the prompt emission
  42. GRB 101204A Swift-XRT/UVOT afterglow candidate
  43. Konus-Wind observation of GRB 101130A
  44. GRB 101204A detected in ground analysis of BAT data
  45. Konus-Wind observation of GRB 101129A
  46. IPN Localization of GRB101130 (possible short duration burst)
  47. GRB 101129A SHB found by IPN and in ground analysis of BAT data
  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 101201A detected in ground analysis of BAT data
  54. GRB 101123A: ROTSE optical observations
  55. GRB 101123A: MASTER prompt optical observations
  56. Konus-Wind observation of GRB 101123A
  57. IPN triangulation of bright GRB 101123A
  58. GRB 101123A: Fermi GBM detection
  59. Optical observation of GRB 101024A
  60. GRB 101117B: GROND Upper limits
  61. GRB 101117B: Swift/UVOT Observations of the Optical Afterglow
  62. GRB 101112A: OSN and BTA observations
  63. GRB 101117B: Swift-XRT refined analysis
  64. GRB101114A: Swift/UVOT Upper Limits
  65. GRB 101114A: Confirmation of the X-ray afterglow
  66. GRB 101117B: Swift-BAT refined analysis
  67. GRB 101117B: Enhanced Swift-XRT position
  68. GRB 101117B: Swift/UVOT Discovery of an Optical Afterglow
  69. GRB 101117B: Swift detection of a burst
  70. GRB 101114A: GROND Upper limits
  71. Konus-Wind observation of GRB 101114A
  72. GRB 101114A: Swift-XRT candidate afterglow detection and analysis
  73. GRB 101114A, Swift-BAT GRB detected by ground processing
  74. Possible detection of INTEGRAL burst GRB 101112A by the EVLA
  75. GRB 101112A: Fermi GBM detection
  76. GRB 101112A: optical observations
  77. GRB 10112A: MASTER optical observations
  78. Konus-Wind observation of GRB 101112A
  79. GRB 101112A - XRT source detection/analysis
  80. GRB 101112A: BOOTES-2/TELMA optical afterglow candidate
  81. GRB101112A: Liverpool Telescope Afterglow Candidate
  82. GRB 101112A: a long GRB detected by INTEGRAL
  83. GRB 100906A: optical observations
  84. GRB 090113, the review of the sky area in plate archives
  85. GRB 101030A : MOA optical observation
  86. GRB 101030A: GROND optical/NIR afterglow candidate
  87. GRB 101030A : Swift XRT refined analysis
  88. GRB 101030A: Swift/UVOT Upper Limits
  89. GRB 101030A: Swift-BAT refined analysis
  90. GRB 101030A: Enhanced Swift-XRT position
  91. GRB 101030A: Swift detection of a burst
  92. GRB 090111, the review of the sky area in plate archives (1976-1996)
  93. Konus-Wind observation of GRB 101023A
  94. GRB 101024A: GROND optical/NIR observations
  95. GRB 101024A: Zadko observatory - Gingin. Optical observations refined analysis
  96. GRB 101024A: Swift XRT refined analysis
  97. GRB 101024A: Zadko observatory - Gingin. Optical observations
  98. GRB 101023A: miniTAO/ANIR NIR detection
  99. GRB 101024A: Fermi GBM observation
  100. GRB 101023A: Fermi GBM observation

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