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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"

27602 results found.

  1. GRB 101219B: Swift-XRT refined Analysis
  2. GRB 101219A: MITSuME Ishigakijima Optical upper limits
  3. GRB 101219B: GROND Detection of the Optical/NIR Afterglow
  4. GRB 101219B: Fermi GBM observation
  5. GRB 101219B: Swift-BAT refined analysis
  6. GRB 101219A: Swift-XRT refined Analysis
  7. GRB 101219B: Swift detection of a burst with an optical afterglow
  8. GRB 101219A: Swift/UVOT Upper Limits
  9. GRB 101219A: GROND Upper limits
  10. Konus-Wind observation of short hard GRB 101219A
  11. GRB 101219A: Magellan NIR observations
  12. GRB 101219A: Further Gemini-South Imaging
  13. GRB 101219A: Swift-BAT refined analysis
  14. GRB 101219A - NOT observation - upper limit
  15. GRB 101219A: SARA-N Upper Limit
  16. GRB 101219A: ROTSE-III Optical Limits
  17. GRB 101219A: Swift detection of a short hard burst
  18. GRB 101213A : Suzaku WAM observation of the prompt emission
  19. Redshift solution(s) for GRB101213A from Swift-XRT data
  20. Konus-Wind observation of GRB 101213A
  21. XRF 101117A, RIMOTS optical upper limits
  22. GRB 101213A: Fermi GBM observation
  23. GRB 101213A, Swift-BAT refined analysis
  24. GRB 101213A: Swift-XRT refined Analysis
  25. GRB 101213A: Swift/UVOT Upper Limits
  26. GRB 101213A: Swift detection of a burst
  27. GRB101204A: Swift/UVOT observations
  28. GRB 101204A: Swift-XRT refined Analysis
  29. GRB101204A GROND Detection of the Optical/NIR Afterglow
  30. GRB 101204A Afterglow Candidate, VATT Observations
  31. GRB 101129A : Suzaku WAM observation of the prompt emission
  32. GRB 101204A Swift-XRT/UVOT afterglow candidate
  33. GRB 101204A detected in ground analysis of BAT data
  34. Konus-Wind observation of GRB 101129A
  35. GRB 101129A SHB found by IPN and in ground analysis of BAT data
  36. GRB 101201A: Fermi GBM observation
  37. GRB 101201A: Swift-XRT refined Analysis
  38. GRB 101201A: Swift/UVOT Detection
  39. GRB 101201A: GROND Detection of the Optical/NIR Afterglow
  40. GRB 101201A detected in ground analysis of BAT data
  41. Swift detection of MAXIJ1409-619
  42. GRB 101123A: ROTSE optical observations
  43. GRB 101123A: MASTER prompt optical observations
  44. Konus-Wind observation of GRB 101123A
  45. IPN triangulation of bright GRB 101123A
  46. GRB 101123A: Fermi GBM detection
  47. GRB 101117B: GROND Upper limits
  48. GRB 101117B: Swift/UVOT Observations of the Optical Afterglow
  49. XRF 101117A: Palomar Transient Factory Observations
  50. GRB 101117B: Swift-XRT refined analysis
  51. GRB101114A: Swift/UVOT Upper Limits
  52. GRB 101114A: Confirmation of the X-ray afterglow
  53. GRB 101117B: Swift-BAT refined analysis
  54. GRB 101117B: Swift detection of a burst
  55. GRB 101114A: GROND Upper limits
  56. Konus-Wind observation of GRB 101114A
  57. Fermi GBM detection of a burst from a galactic source
  58. GRB 101114A: Swift-XRT candidate afterglow detection and analysis
  59. GRB 101114A, Swift-BAT GRB detected by ground processing
  60. GRB 101112A: Fermi GBM detection
  61. GRB 101112A - XRT source detection/analysis
  62. GRB 100906A: optical observations
  63. GRB 101030A : Swift XRT refined analysis
  64. GRB 101030A: Swift/UVOT Upper Limits
  65. GRB 101030A: Swift-BAT refined analysis
  66. GRB 101030A: Swift detection of a burst
  67. Konus-Wind observation of GRB 101023A
  68. GRB 101024A: Swift XRT refined analysis
  69. GRB 101024A: Zadko observatory - Gingin. Optical observations
  70. GRB 101024A: Fermi GBM observation
  71. GRB 101023A: Fermi GBM observation
  72. GRB101024A: Swift/UVOT
  73. GRB 101024A: Swift-BAT refined analysis
  74. Swift/UVOT observations of GRB101023A
  75. GRB 101024A: Swift detection of a burst with an optical afterglow
  76. GGRB 101023A: GROND detection of the optical-NIR afterglow
  77. GRB 101023A: Swift-XRT Team Refined Analysis
  78. GRB 101023A: Swift-BAT refined analysis
  79. GRB 101023A: Swift detection of a burst
  80. GRB 101020A: MASTER prompt and afterglow limit
  81. GRB 101020A: BOOTES2 follow-up and limit
  82. GRB 101020A: MASTER polarization optical observations
  83. GRB 101020A, Swift-BAT refined analysis
  84. GRB 101020A: Swift detection of a burst
  85. GRB 101017A: Swift XRT refined analysis
  86. GRB 101017A: Swift/UVOT Observations
  87. Konus-Wind observation of GRB 101017A
  88. GRB 101014A: Fermi LAT detection
  89. GRB 101017A: Swift-BAT refined analysis
  90. GRB 101017A: ROTSE-III Optical Limits
  91. GRB 101017A: Swift detection of a burst with optical counterpart
  92. GRB 101011A: Fermi GBM detection
  93. Konus-Wind observation of GRB 101014A
  94. GRB 101014A: Fermi GBM detection
  95. GRB 100906A: D50 optical detection
  96. GRB 100902A: D50 optical limit
  97. GRB 101011A: Swift/UVOT observations
  98. GRB 101011A, GROND upper limits
  99. GRB 101011A: Zadko observatory - Gingin optical observations
  100. GRB 101011A: XRT Refined Analysis

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