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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"

32720 results found.

  1. GRB 101213: object within the X-ray error circle
  2. GRB101204A: Swift/UVOT observations
  3. GRB 101204A: Swift-XRT refined Analysis
  4. GRB101204A GROND Detection of the Optical/NIR Afterglow
  5. GRB 101204A Afterglow Candidate, VATT Observations
  6. GRB 101204A Swift-XRT/UVOT afterglow candidate
  7. Konus-Wind observation of GRB 101130A
  8. Konus-Wind observation of GRB 101129A
  9. IPN Localization of GRB101130 (possible short duration burst)
  10. GRB101030A
  11. GRB 101201A: Fermi GBM observation
  12. GRB 101201A: Swift-XRT refined Analysis
  13. GRB 101201A: Swift/UVOT Detection
  14. GRB 101201A: GROND Detection of the Optical/NIR Afterglow
  15. Swift detection of MAXIJ1409-619
  16. GRB 101123A: ROTSE optical observations
  17. GRB 101123A: MASTER prompt optical observations
  18. Konus-Wind observation of GRB 101123A
  19. IPN triangulation of bright GRB 101123A
  20. Optical observation of GRB 101024A
  21. GRB 101117B: GROND Upper limits
  22. GRB 101117B: Swift/UVOT Observations of the Optical Afterglow
  23. XRF 101117A: Palomar Transient Factory Observations
  24. GRB 101117B: Swift-XRT refined analysis
  25. GRB101114A: Swift/UVOT Upper Limits
  26. GRB 101114A: Confirmation of the X-ray afterglow
  27. GRB 101117B: Swift-BAT refined analysis
  28. GRB 101114A: GROND Upper limits
  29. Konus-Wind observation of GRB 101114A
  30. GRB 101114A: Swift-XRT candidate afterglow detection and analysis
  31. Possible detection of INTEGRAL burst GRB 101112A by the EVLA
  32. GRB 101112A: Fermi GBM detection
  33. GRB 101112A: optical observations
  34. GRB 10112A: MASTER optical observations
  35. Konus-Wind observation of GRB 101112A
  36. GRB 101112A - XRT source detection/analysis
  37. GRB 101112A: BOOTES-2/TELMA optical afterglow candidate
  38. GRB101112A: Liverpool Telescope Afterglow Candidate
  39. GRB 100906A: optical observations
  40. GRB 090113, the review of the sky area in plate archives
  41. GRB 101030A : MOA optical observation
  42. GRB 101030A: GROND optical/NIR afterglow candidate
  43. GRB 101030A : Swift XRT refined analysis
  44. GRB 101030A: Swift/UVOT Upper Limits
  45. GRB 101030A: Swift-BAT refined analysis
  46. GRB 090111, the review of the sky area in plate archives (1976-1996)
  47. Konus-Wind observation of GRB 101023A
  48. GRB 101024A: GROND optical/NIR observations
  49. GRB 101024A: Swift XRT refined analysis
  50. GRB 101023A: miniTAO/ANIR NIR detection
  51. GRB 101024A: Fermi GBM observation
  52. GRB 101023A: Fermi GBM observation
  53. GRB101024A: Swift/UVOT
  54. GRB 101024A: Swift-BAT refined analysis
  55. GRB 101024A: GRAS06 optical observations
  56. Swift/UVOT observations of GRB101023A
  57. GGRB 101023A: GROND detection of the optical-NIR afterglow
  58. GRB 101023A: Swift-XRT Team Refined Analysis
  59. GRB 101023A: Swift-BAT refined analysis
  60. GRB 101023A: Gemini discovery of optical afterglow
  61. GRB 101023A: REM NIR observations
  62. GRB 101011A: miniTAO/ANIR NIR upper limits
  63. GRB 101020A: MASTER prompt and afterglow limit
  64. GRB 101020A: MASTER polarization optical observations
  65. GRB 101020A, Swift-BAT refined analysis
  66. GRB 101017A: miniTAO/ANIR NIR upper limits
  67. GRB 101017A: Swift XRT refined analysis
  68. GRB 101017A: Swift/UVOT Observations
  69. GRB 101008A: correction to the GCN 11352
  70. GRB 101008A: optical observations
  71. GRB101017A: MITSuME Okayama optical upper limits
  72. Konus-Wind observation of GRB 101017A
  73. GRB 101014A: Fermi LAT detection
  74. GRB 101017A: Swift-BAT refined analysis
  75. GRB 101017A: ROTSE-III Optical Limits
  76. GRB 101011A: Fermi GBM detection
  77. Konus-Wind observation of GRB 101014A
  78. GRB 100906A: D50 optical detection
  79. GRB 100902A: D50 optical limit
  80. GRB 101011A: Swift/UVOT observations
  81. GRB 101011A, GROND upper limits
  82. GRB 101011A: Zadko observatory - Gingin optical observations
  83. GRB 101011A: XRT Refined Analysis
  84. GRB 101011A: Swift/UVOT Observations of a Possible Optical Afterglow
  85. GRB 101011A: Swift-BAT refined analysis
  86. GRB 101008A: Fermi GBM observation
  87. GRB 101008A: MASTER prompt optical observations (correction to GCN#11328)
  88. GRB 101008A: MASTER prompt optical observations
  89. GRB 101008A: Swift-BAT refined analysis
  90. GRB101008A, GROND detection of a fading afterglow
  91. GRB 101008A: Swift-XRT refined analysis
  92. GRB 101008A: SAO RAS optical observations
  93. GRB 100915 optical upper limit
  94. GRB 101008: Swift/UVOT Upper Limits
  95. GRB 100728B: X-shooter redshift
  96. GRB 100925A / MAXI J1659-152: MASTER optical observations
  97. GRB 100924A: Suzaku WAM observation of the prompt emission
  98. GRB 100928A, Swift-BAT refined analysis
  99. GRB 100924A: Fermi GBM observation
  100. GRB 100925A / MAXI J1659-152: WSRT Radio and Polarization Detection

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