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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"

28229 results found.

  1. Swift UVOT Observations of GRB 050716
  2. GRB 050716: Refined XRT analysis.
  3. GRB050716: Refined analysis of the Swift-BAT burst
  4. GRB 050716: Lulin B and R band optical observations
  5. GRB050716, optical observation
  6. GRB050716: Faulkes North Telescope observation
  7. GRB050715: Refined analysis of the Swift-BAT burst
  8. GRB 050715: Swift-BAT detection
  9. GRB 050713b: RTT150 optical observations
  10. GRB050714B: Refined analysis of the Swift-BAT burst
  11. GRB 050714B: optical afterglow
  12. GRB 050714, R-band candidate
  13. GRB 050714, optical observations
  14. GRB 050713A: XRT refined analysis
  15. GRB 050713A: RAPTOR detection of early optical emission
  16. GRB050713B :Swift/UVOT observations
  17. GRB050713b: XRT refined analysis
  18. GRB050712: TNG R-band observations
  19. GRB 050713B: Swift-BAT Refined Analysis
  20. GRB 050713A: Swift/UVOT observation
  21. GRB 050713A : Swift-BAT Refined Analysis
  22. GRB050712: Swift UVOT Observation of Afterglow Emission
  23. GRB 050713A : Lulin R-band observation
  24. GRB 050713A XMM-Newton observation
  25. GRB 050713b : Lulin R-band observations
  26. GRB050713B: Faulkes North Telescope observation
  27. RBO RI observations of GRB 050713A
  28. GRB 050713B
  29. GRB050709 : Chandra source optical counterpart
  30. GRB050713: Liverpool Telescope prompt observations
  31. GRB 050712, optical observations
  32. GRB050709: Candidate X-ray Afterglow from Chandra
  33. GRB050713: possible I-band afterglow
  34. GRB050712: XRT refined analysis
  35. GRB050709: Radio Observations
  36. GRB 050709: Swift UVOT and XRT observations
  37. GRB 050712: Swift-BAT Refined Analysis
  38. GRB050712: UVOT candidate optical counterpart
  39. GRB 050709: LCO40 Observations
  40. GRB050709, optical observations
  41. PROMPT Rc Observations of GRB 050709
  42. GRB 050525a: PROMPT VRcIc Detections
  43. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  44. GRB 050525a: ARC 3.5-Meter SPIcam Field Calibration
  45. GRB 050626: Swift XRT observations
  46. GRB 050408: ARC 3.5-meter NIR Observations
  47. GRB 050701: Refined XRT analysis
  48. Swift UVOT observations of GRB 050701
  49. GRB050701: Swift-BAT Refined analysis
  50. Swift trigger 143708 is really GRB 050701
  51. GRB 050607, radio observations
  52. H11603: An X-ray flare from V4641 Sgr, or a possible XRF
  53. GRB050525a: HST Observations
  54. H3800 and H3801 on 2005 June 11: two bursts from SGR1806-20 localized by HETE
  55. XRF 050509c: Optical monitoring
  56. Konus-Wind observation of an intermediate burst from SGR 1806-20
  57. XRF050509c: Radio Detection
  58. GRB 050607 optical decay
  59. GRB050607: refined analysis of prompt REM observations
  60. GRB 050607: PROMPT VRcIc Observations
  61. GRB 050607: Optical decay and spectral slope
  62. GRB050607,optical observation
  63. Optical Afterglow of GRB 050607
  64. GRB050607: Swift Detection of a long GRB
  65. GRB050607: prompt REM observations
  66. Limits on a SN in the field of GRB 050509b
  67. GRB 050603 - XRT data analysis of the first day
  68. GRB050603, submillimetre observations
  69. GRB050603: Radio Detection
  70. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  71. GRB 050603: INTEGRAL shows it is not a short GRB
  72. GRB 050525a, infrared observations
  73. GRB050528, XRT observations
  74. GRB050528: updated Liverpool Telescope limits
  75. Swift-BAT GRB 050528: a soft burst
  76. GRB050504: Ashra-P2/3 monitor and Ashra-AFT response
  77. Possible GRB050528: no candidate from Liverpool Telescope
  78. GRB050525a: Radio Observations
  79. GRB 050509b: refined XRT/Chandra afterglow position analysis
  80. GRB 050525: RTT150, Optical observations
  81. GRB 050525a: SARA Observations
  82. GRB 050525B: Swift-BAT observations
  83. GRB 050525: MITSuME Optical Observation in VRI
  84. GRB050525A,optical observation
  85. GRB050525: Super-LOTIS observations
  86. GRB 050525, spectral lag pseudo-redshift
  87. GRB050306: optical afterglow not confirmed
  88. GRB 050525: BART optical observation
  89. GRB 050525A: BOOTES simultaneous optical observations
  90. GRB 050525A: Swift-BAT refined analysis
  91. GRB050525: Optical observations
  92. GRB 050525B: INTEGRAL shows it is unrelated to GRB050525A
  93. Konus-Wind observation of GRB 050525
  94. GRB 050525: TAROT observations of the early afterglow
  95. INTEGRAL detection of GRB 050525
  96. GRB 050525, infrared observations
  97. GRB 050525: observatons of the optical afterglow
  98. GRB050525: ROTSE-III Refined Analysis
  99. GRB 050525: Swift Detection of a Bright, Possibly Short Burst
  100. XRF050522: Radio Observations

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