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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"

36222 results found.

  1. GRB 051016B: refined analysis of the Swift/XRT data
  2. GRB 051016B: Swift/UVOT detection
  3. GRB 051016B,optical observation
  4. GRB 051016B : Optical follow-up at Lulin
  5. GRB 051016B: Refined analysis of the Swift-BAT burst
  6. GRB 051016B: Swift detection of a soft burst
  7. GRB 051016: Swift-BAT refined analysis
  8. GRB051016: Swift XRT refined analysis.
  9. GRB 051016: LCO optical and near-IR imaging
  10. GRB 051016: PROMPT Observations
  11. GRB051016: Swift detection of a burst
  12. Photometric calibration of Swift/UVOT and Re-analysis of Swift/UVOT GRB 050922C data
  13. GRB051006: optical observations
  14. GRB 051012: Swift-BAT detection of burst yesterday
  15. Swift trigger 159578 is not a burst
  16. GRB 051006: Swift/UVOT Upper Limits
  17. IBAS Alert 2675 : not a GRB
  18. GRB051008: optical candidate
  19. GRB 051008: - a high redshift high-luminosity burst?
  20. GRB 051008 - a low redshift low-luminosity burst?
  21. IBAS Alert 2673: not a real GRB
  22. GRB051011: MASTER optical observation
  23. GRB051008: optical observation
  24. GRB051008: Swift XRT refined analysis
  25. GRB051008 - Swift UVOT upper limits
  26. Konus-Wind observation of GRB 051008
  27. GRB051008: Final refined analysis of the Swift-BAT burst
  28. GRB 051008: R-band upper limit
  29. GRB051008: Radio Observation
  30. GRB 051008: Swift XRT position
  31. GRB 051008, optical observations
  32. GRB 051008: early Swift XRT analysis
  33. GRB 051008: Swift UVOT Candidate
  34. GRB 051006: P60 Observations
  35. grb test
  36. GRB 051006: XRT refined analysis
  37. GRB 051006: optical observations at Sierra Nevada
  38. GRB 051006: XRT position
  39. GRB 050906, summary of radio observations
  40. GRB 050925: Second Epoch WSRT Radio Observations
  41. GRB 051001: Swift XRT refined analysis
  42. GRB 051001, optical observations at Mt. John
  43. GRB 051001: I-band limit
  44. GRB 051001: AAT infra-red observations
  45. GRB 051001: Swift-BAT refined analysis
  46. GRB 051001: Swift Detection of a Burst
  47. GRB 051001: ROTSE-III Optical Limits
  48. GRB050908: optical observations
  49. GRB050922C: optical observation
  50. GRB050922B: optical limit
  51. GRB 050922C: further VLT observations
  52. GRB 050820A: NIR photometry at the TNG
  53. GRB050922C: UVES/VLT high resolution spectroscopy
  54. GRB050925: Swift/XRT limits
  55. GRB/SGR 050925: IR Observations
  56. GRB 050922C: break in the lightcurve
  57. GRB 050925: WSRT Radio Observations
  58. GRB 050925 : I-band observation at Xinglong observatory
  59. GRB050925: Faulkes Telescope North R-band limit
  60. GRB050925: Swift-BAT detection of a short burst
  61. GRB 050922B: Correction to BAT refined analysis, longer burst
  62. GRB050922C: TNG spectroscopic observations
  63. GRB050922B: refined XRT analysis
  64. Konus-Wind observation of GRB 050922C
  65. GRB 050922C: Refined redshift
  66. GRB OT observation
  67. GRB050922C: observation at MonteBoo
  68. INT 2.5m limit for GRB050922B
  69. GRB 050922B: optical limit
  70. GRB050922C: Optical Observations
  71. GRB 050922C: Swift XRT refined analysis
  72. HETE Fregate observations of GRB 050922C
  73. GRB 050922C: Swift-BAT refined analysis
  74. GRB 050922B: Swift-BAT refined analysis
  75. GRB 050922C: Absorption redshift from the Nordic Optical Telescope
  76. GRB 050922C: optical obserations
  77. GRB 050922C: NOT optical observations
  78. GRB 050922A: Analysis of Swift/XRT TOO observation
  79. GRB 050922C: Swift detection of a bright burst
  80. GRB 050922C: ROTSE-IIId Refined Analysis
  81. GRB 050922C: ROTSE-III Detection of Possible Counterpart
  82. GRB 050922B: ROTSE-III Optical Limits
  83. GRB 050922B,optical observation
  84. GRB050922B: Swift-BAT detection of a weak long burst
  85. Possible GRB 050922 detected by INTEGRAL
  86. GRB050820B: analysis of the XMM-Newton observation
  87. GRB050916: Swift/UVOT Upper Limits
  88. GRB 050916: Swift-BAT refined analysis
  89. GRB 050918 - A long GRB detected by INTEGRAL
  90. GRB 050915a: Radio Observations
  91. Swift-BAT trigger 155764 is not a GRB
  92. Swift-BAT trigger 155764 is probably not a GRB
  93. Swift-BAT trigger 155535 is definitely not a GRB
  94. GRB 050916: XRT position
  95. GRB 050915b, SMARTS optical/IR observations of the XRT position
  96. GRB 050915B: Swift-BAT refined analysis
  97. GRB 050915B: Swift/UVOT Upper Limits
  98. GRB 050915a: IR Transient
  99. GRB 050915B: XRT position
  100. GRB 050915b, SMARTS optical/IR observations

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