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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"

28233 results found.

  1. Swift/UVOT Observations of GRB 050717
  2. GRB 050717: Swift-BAT refined analysis
  3. GRB050717: Swift XRT position
  4. Swift detection of GRB 050717
  5. Swift UVOT Observations of GRB 050716
  6. GRB 050716: Refined XRT analysis.
  7. GRB050716: Refined analysis of the Swift-BAT burst
  8. GRB 050716: Lulin B and R band optical observations
  9. GRB050716, optical observation
  10. GRB050716: Faulkes North Telescope observation
  11. GRB050715: Refined analysis of the Swift-BAT burst
  12. GRB 050715: Swift-BAT detection
  13. GRB 050713b: RTT150 optical observations
  14. GRB050714B: Refined analysis of the Swift-BAT burst
  15. GRB 050714B: optical afterglow
  16. GRB 050714, R-band candidate
  17. GRB 050714, optical observations
  18. GRB 050713A: XRT refined analysis
  19. GRB 050713A: RAPTOR detection of early optical emission
  20. GRB050713B :Swift/UVOT observations
  21. GRB050713b: XRT refined analysis
  22. GRB050712: TNG R-band observations
  23. GRB 050713B: Swift-BAT Refined Analysis
  24. GRB 050713A: Swift/UVOT observation
  25. GRB 050713A : Swift-BAT Refined Analysis
  26. GRB050712: Swift UVOT Observation of Afterglow Emission
  27. GRB 050713A : Lulin R-band observation
  28. GRB 050713A XMM-Newton observation
  29. GRB 050713b : Lulin R-band observations
  30. GRB050713B: Faulkes North Telescope observation
  31. RBO RI observations of GRB 050713A
  32. GRB 050713B
  33. GRB050709 : Chandra source optical counterpart
  34. GRB050713: Liverpool Telescope prompt observations
  35. GRB 050712, optical observations
  36. GRB050709: Candidate X-ray Afterglow from Chandra
  37. GRB050713: possible I-band afterglow
  38. GRB050712: XRT refined analysis
  39. GRB050709: Radio Observations
  40. GRB 050709: Swift UVOT and XRT observations
  41. GRB 050712: Swift-BAT Refined Analysis
  42. GRB050712: UVOT candidate optical counterpart
  43. GRB 050709: LCO40 Observations
  44. GRB050709, optical observations
  45. PROMPT Rc Observations of GRB 050709
  46. GRB 050525a: PROMPT VRcIc Detections
  47. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  48. GRB 050525a: ARC 3.5-Meter SPIcam Field Calibration
  49. GRB 050626: Swift XRT observations
  50. GRB 050408: ARC 3.5-meter NIR Observations
  51. GRB 050701: Refined XRT analysis
  52. Swift UVOT observations of GRB 050701
  53. GRB050701: Swift-BAT Refined analysis
  54. Swift trigger 143708 is really GRB 050701
  55. GRB 050607, radio observations
  56. H11603: An X-ray flare from V4641 Sgr, or a possible XRF
  57. GRB050525a: HST Observations
  58. H3800 and H3801 on 2005 June 11: two bursts from SGR1806-20 localized by HETE
  59. XRF 050509c: Optical monitoring
  60. Konus-Wind observation of an intermediate burst from SGR 1806-20
  61. XRF050509c: Radio Detection
  62. GRB 050607 optical decay
  63. GRB050607: refined analysis of prompt REM observations
  64. GRB 050607: PROMPT VRcIc Observations
  65. GRB 050607: Optical decay and spectral slope
  66. GRB050607,optical observation
  67. Optical Afterglow of GRB 050607
  68. GRB050607: Swift Detection of a long GRB
  69. GRB050607: prompt REM observations
  70. Limits on a SN in the field of GRB 050509b
  71. GRB 050603 - XRT data analysis of the first day
  72. GRB050603, submillimetre observations
  73. GRB050603: Radio Detection
  74. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  75. GRB 050603: INTEGRAL shows it is not a short GRB
  76. GRB 050525a, infrared observations
  77. GRB050528, XRT observations
  78. GRB050528: updated Liverpool Telescope limits
  79. Swift-BAT GRB 050528: a soft burst
  80. GRB050504: Ashra-P2/3 monitor and Ashra-AFT response
  81. Possible GRB050528: no candidate from Liverpool Telescope
  82. GRB050525a: Radio Observations
  83. GRB 050509b: refined XRT/Chandra afterglow position analysis
  84. GRB 050525: RTT150, Optical observations
  85. GRB 050525a: SARA Observations
  86. GRB 050525B: Swift-BAT observations
  87. GRB 050525: MITSuME Optical Observation in VRI
  88. GRB050525A,optical observation
  89. GRB050525: Super-LOTIS observations
  90. GRB 050525, spectral lag pseudo-redshift
  91. GRB050306: optical afterglow not confirmed
  92. GRB 050525: BART optical observation
  93. GRB 050525A: BOOTES simultaneous optical observations
  94. GRB 050525A: Swift-BAT refined analysis
  95. GRB050525: Optical observations
  96. GRB 050525B: INTEGRAL shows it is unrelated to GRB050525A
  97. Konus-Wind observation of GRB 050525
  98. GRB 050525: TAROT observations of the early afterglow
  99. INTEGRAL detection of GRB 050525
  100. GRB 050525, infrared observations

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