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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"

5175 results found.

  1. GRB 100425A: GROND afterglow observation
  2. GRB100424A: MITSuME optical upper limits
  3. GRB 100424A : Lulin early z'-band upper limit
  4. GRB 100424A: GROND Upper Limits
  5. GRB 100424A: Swift-XRT refined analysis
  6. GRB 100424A: NOT optical observations
  7. GRB 100423A: Swift detection of a burst
  8. GRB 100420A: XRT refined analysis
  9. GRB 100420A: ROTSE-III Optical Limits
  10. GRB 100420A: Swift detection of a burst
  11. GRB 100418A: Swift-XRT Refined Analysis
  12. GRB 100418A: host galaxy detection in the SDSS
  13. GRB 100413A: Swift-XRT Refined Analysis
  14. IPN triangulation of GRB100324B
  15. Short X-ray Transient detected by MAXI/GSC
  16. GRB 100322A: Suzaku WAM observation of the prompt emission
  17. GRB 100324A: GROND observations
  18. GRB 100324A found in ground analysis of BAT data
  19. GRB 100316D: Further Gemini observations
  20. GRB 100316C: Swift-XRT team refined analysis
  21. GRB 100316A: Swift-XRT refined analysis
  22. GRB 100305A: Swift-XRT refined analysis
  23. GRB 100305A: Enhanced Swift-XRT position
  24. GRB 100305A: Gemini-N OT candidate
  25. GRB 100305A: Swift detection of a burst
  26. GRB 100302A: Swift-XRT refined analysis
  27. GRB 100224B: Fermi GBM detection
  28. GRB 100219A: GAO 150cm telescope Optical Observation
  29. GRB 100219A: XRT refined analysis
  30. GRB 100213B: Swift XRT refined analysis
  31. GRB 100206A: Swift-XRT refined analysis
  32. Short X-ray Transient detected by MAXI/GSC
  33. GRB 100119A: Suzaku WAM observation of the prompt emission
  34. GRB100111A: Swift-XRT refined analysis
  35. GRB 091221: Swift-XRT refined analysis
  36. GRB 091208B: Swift-XRT refined analysis
  37. Short X-ray Transient Detection by MAXI/GSC
  38. GRB 091130B: Swift-XRT team refined analysis
  39. GRB 091127: Swift-XRT afterglow detection and analysis
  40. GRB 091127 : GROND observations
  41. GRB 091117: 2nd epoch of Magellan optical observations
  42. GRB091117: Gemini South Observations
  43. GRB 091112: Suzaku WAM observation of the prompt emission
  44. GRB 091109B: Suzaku WAM observation of the prompt emission
  45. GRB 091109B: Swift-XRT Team refined analysis
  46. GRB 091109: Swift-XRT refined analysis
  47. GRB 091104: Swift XRT Refined Analysis
  48. GRB 091104: Enhanced Swift-XRT position
  49. GRB 091104: Swift detection of a burst
  50. GRB 091024: optical observations
  51. GRB 091029: Swift XRT refined analysis
  52. GRB 091024: Keck/LRIS Spectroscopy
  53. GRB 091026: Swift-XRT refined analysis
  54. GRB 091024: Fermi GBM Observations
  55. GRB 091024: Swift-XRT team refined analysis
  56. GRB 091024: Xinglong TNT optical observation
  57. GRB 091024: GRAS004 optical observations
  58. GRB 091020: Additional Lick observations
  59. GRB 091020: Swift-XRT refined analysis
  60. GRB 090812: Skynet/PROMPT and GORT Observations
  61. GRB 091003A: Suzaku WAM observation of the prompt emission
  62. GRB 090929B: Swift-XRT refined analysis
  63. GRB 090927: Swift XRT refined analysis
  64. GRB 090926B: Swift XRT refined analysis
  65. GRB 090926A: Skynet/PROMPT Discovery of the Optical Afterglow
  66. GRB 090823: Swift XRT confirmation of the X-ray afterglow
  67. GRB 090902B: Suzaku WAM observation of the prompt emission
  68. GRB 090904B: Fermi GBM detection
  69. GRB 090904A: Swift-XRT refined analysis
  70. GRB 090904B: Swift XRT Refined Analysis
  71. GRB 090904B: Swift detection of a burst
  72. GRB 090831C: Swift XRT Refined Analysis
  73. GRB 090831: MAXI GSC detection
  74. GRB 090823: Swift XRT possible detection of the X-ray afterglow
  75. GRB 090817: aphotometry of USNO-B1.0 341-0096763
  76. GRB 090815B: Fermi GBM detection
  77. GRB 090814B: Swift-XRT detection of a possible afterglow.
  78. GRB 090814A: Swift-XRT Team Refined Analysis
  79. GRB 090813: Swift-XRT refined analysis
  80. GRB 090812: Swift XRT refined analysis
  81. GRB 090809: Swift-XRT refined analysis
  82. GRB 090807: Liverpool Telescope observations
  83. GRB 090807: Swift-XRT refined analysis
  84. Swift trigger 358760 is probably a noise event
  85. GRB 090727: Swift-XRT refined analysis
  86. GRB 090715B: Late-time Lick 3m observations
  87. GRB 090726: Swift-XRT Team refined analysis
  88. GRB 090720: Fermi GBM detection
  89. GRB 090715B: Swift XRT Refined Analysis
  90. GRB 090621B: MTM-500 optical observations
  91. GRB 090709B: Fermi GBM detection
  92. GRB 090709A: Quasiperiodic variations in the BAT light curve
  93. GRB 090709A: NOT optical observations
  94. GRB 090709A: Swift XRT Refined Analysis
  95. GRB 090529: CrAO optical upper limit
  96. GRB 090529: Mt.Terskol optical observations
  97. GRB 090630: Fermi GBM detection
  98. Konus-Wind observation of GRB 090626
  99. GRB 090625B: Swift-XRT refined analysis
  100. GRB 090625B: Swift observation of the INTEGRAL GRB 090625B

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