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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"

28124 results found.

  1. GRB050716: Faulkes North Telescope observation
  2. GRB050715: Refined analysis of the Swift-BAT burst
  3. GRB 050715: Swift-BAT detection
  4. GRB 050713b: RTT150 optical observations
  5. GRB050714B: Refined analysis of the Swift-BAT burst
  6. GRB 050714B: optical afterglow
  7. GRB 050714, R-band candidate
  8. GRB 050714, optical observations
  9. GRB 050713A: XRT refined analysis
  10. GRB 050713A: RAPTOR detection of early optical emission
  11. GRB050713B :Swift/UVOT observations
  12. GRB050713b: XRT refined analysis
  13. GRB050712: TNG R-band observations
  14. GRB 050713B: Swift-BAT Refined Analysis
  15. GRB 050713A: Swift/UVOT observation
  16. GRB 050713A : Swift-BAT Refined Analysis
  17. GRB050712: Swift UVOT Observation of Afterglow Emission
  18. GRB 050713A : Lulin R-band observation
  19. GRB 050713A XMM-Newton observation
  20. GRB 050713b : Lulin R-band observations
  21. GRB050713B: Faulkes North Telescope observation
  22. RBO RI observations of GRB 050713A
  23. GRB 050713B
  24. GRB050709 : Chandra source optical counterpart
  25. GRB050713: Liverpool Telescope prompt observations
  26. GRB 050712, optical observations
  27. GRB050709: Candidate X-ray Afterglow from Chandra
  28. GRB050713: possible I-band afterglow
  29. GRB050712: XRT refined analysis
  30. GRB050709: Radio Observations
  31. GRB 050709: Swift UVOT and XRT observations
  32. GRB 050712: Swift-BAT Refined Analysis
  33. GRB050712: UVOT candidate optical counterpart
  34. GRB 050709: LCO40 Observations
  35. GRB050709, optical observations
  36. PROMPT Rc Observations of GRB 050709
  37. GRB 050525a: PROMPT VRcIc Detections
  38. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  39. GRB 050525a: ARC 3.5-Meter SPIcam Field Calibration
  40. GRB 050626: Swift XRT observations
  41. GRB 050408: ARC 3.5-meter NIR Observations
  42. GRB 050701: Refined XRT analysis
  43. Swift UVOT observations of GRB 050701
  44. GRB050701: Swift-BAT Refined analysis
  45. Swift trigger 143708 is really GRB 050701
  46. GRB 050607, radio observations
  47. H11603: An X-ray flare from V4641 Sgr, or a possible XRF
  48. GRB050525a: HST Observations
  49. H3800 and H3801 on 2005 June 11: two bursts from SGR1806-20 localized by HETE
  50. XRF 050509c: Optical monitoring
  51. Konus-Wind observation of an intermediate burst from SGR 1806-20
  52. XRF050509c: Radio Detection
  53. GRB 050607 optical decay
  54. GRB050607: refined analysis of prompt REM observations
  55. GRB 050607: PROMPT VRcIc Observations
  56. GRB 050607: Optical decay and spectral slope
  57. GRB050607,optical observation
  58. Optical Afterglow of GRB 050607
  59. GRB050607: Swift Detection of a long GRB
  60. GRB050607: prompt REM observations
  61. Limits on a SN in the field of GRB 050509b
  62. GRB 050603 - XRT data analysis of the first day
  63. GRB050603, submillimetre observations
  64. GRB050603: Radio Detection
  65. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  66. GRB 050603: INTEGRAL shows it is not a short GRB
  67. GRB 050525a, infrared observations
  68. GRB050528, XRT observations
  69. GRB050528: updated Liverpool Telescope limits
  70. Swift-BAT GRB 050528: a soft burst
  71. GRB050504: Ashra-P2/3 monitor and Ashra-AFT response
  72. Possible GRB050528: no candidate from Liverpool Telescope
  73. GRB050525a: Radio Observations
  74. GRB 050509b: refined XRT/Chandra afterglow position analysis
  75. GRB 050525: RTT150, Optical observations
  76. GRB 050525a: SARA Observations
  77. GRB 050525B: Swift-BAT observations
  78. GRB 050525: MITSuME Optical Observation in VRI
  79. GRB050525A,optical observation
  80. GRB050525: Super-LOTIS observations
  81. GRB 050525, spectral lag pseudo-redshift
  82. GRB050306: optical afterglow not confirmed
  83. GRB 050525: BART optical observation
  84. GRB 050525A: BOOTES simultaneous optical observations
  85. GRB 050525A: Swift-BAT refined analysis
  86. GRB050525: Optical observations
  87. GRB 050525B: INTEGRAL shows it is unrelated to GRB050525A
  88. Konus-Wind observation of GRB 050525
  89. GRB 050525: TAROT observations of the early afterglow
  90. INTEGRAL detection of GRB 050525
  91. GRB 050525, infrared observations
  92. GRB 050525: observatons of the optical afterglow
  93. GRB050525: ROTSE-III Refined Analysis
  94. GRB 050525: Swift Detection of a Bright, Possibly Short Burst
  95. XRF050522: Radio Observations
  96. Swift/UVOT observation of XRF 050522
  97. GRB 050509A: Further I-band imaging
  98. GRB050522,optical observation
  99. GRB050520,optical observation
  100. XRF 050522: Continued NIR P200 Monitoring

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