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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"

28116 results found.

  1. GRB 050713A: XRT refined analysis
  2. GRB 050713A: RAPTOR detection of early optical emission
  3. GRB050713B :Swift/UVOT observations
  4. GRB050713b: XRT refined analysis
  5. GRB050712: TNG R-band observations
  6. GRB 050713B: Swift-BAT Refined Analysis
  7. GRB 050713A: Swift/UVOT observation
  8. GRB 050713A : Swift-BAT Refined Analysis
  9. GRB050712: Swift UVOT Observation of Afterglow Emission
  10. GRB 050713A : Lulin R-band observation
  11. GRB 050713A XMM-Newton observation
  12. GRB 050713b : Lulin R-band observations
  13. GRB050713B: Faulkes North Telescope observation
  14. RBO RI observations of GRB 050713A
  15. GRB 050713B
  16. GRB050709 : Chandra source optical counterpart
  17. GRB050713: Liverpool Telescope prompt observations
  18. GRB 050712, optical observations
  19. GRB050709: Candidate X-ray Afterglow from Chandra
  20. GRB050713: possible I-band afterglow
  21. GRB050712: XRT refined analysis
  22. GRB050709: Radio Observations
  23. GRB 050709: Swift UVOT and XRT observations
  24. GRB 050712: Swift-BAT Refined Analysis
  25. GRB050712: UVOT candidate optical counterpart
  26. GRB 050709: LCO40 Observations
  27. GRB050709, optical observations
  28. PROMPT Rc Observations of GRB 050709
  29. GRB 050525a: PROMPT VRcIc Detections
  30. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  31. GRB 050525a: ARC 3.5-Meter SPIcam Field Calibration
  32. GRB 050626: Swift XRT observations
  33. GRB 050408: ARC 3.5-meter NIR Observations
  34. GRB 050701: Refined XRT analysis
  35. Swift UVOT observations of GRB 050701
  36. GRB050701: Swift-BAT Refined analysis
  37. Swift trigger 143708 is really GRB 050701
  38. GRB 050607, radio observations
  39. H11603: An X-ray flare from V4641 Sgr, or a possible XRF
  40. GRB050525a: HST Observations
  41. H3800 and H3801 on 2005 June 11: two bursts from SGR1806-20 localized by HETE
  42. XRF 050509c: Optical monitoring
  43. Konus-Wind observation of an intermediate burst from SGR 1806-20
  44. XRF050509c: Radio Detection
  45. GRB 050607 optical decay
  46. GRB050607: refined analysis of prompt REM observations
  47. GRB 050607: PROMPT VRcIc Observations
  48. GRB 050607: Optical decay and spectral slope
  49. GRB050607,optical observation
  50. Optical Afterglow of GRB 050607
  51. GRB050607: Swift Detection of a long GRB
  52. GRB050607: prompt REM observations
  53. Limits on a SN in the field of GRB 050509b
  54. GRB 050603 - XRT data analysis of the first day
  55. GRB050603, submillimetre observations
  56. GRB050603: Radio Detection
  57. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  58. GRB 050603: INTEGRAL shows it is not a short GRB
  59. GRB 050525a, infrared observations
  60. GRB050528, XRT observations
  61. GRB050528: updated Liverpool Telescope limits
  62. Swift-BAT GRB 050528: a soft burst
  63. GRB050504: Ashra-P2/3 monitor and Ashra-AFT response
  64. Possible GRB050528: no candidate from Liverpool Telescope
  65. GRB050525a: Radio Observations
  66. GRB 050509b: refined XRT/Chandra afterglow position analysis
  67. GRB 050525: RTT150, Optical observations
  68. GRB 050525a: SARA Observations
  69. GRB 050525B: Swift-BAT observations
  70. GRB 050525: MITSuME Optical Observation in VRI
  71. GRB050525A,optical observation
  72. GRB050525: Super-LOTIS observations
  73. GRB 050525, spectral lag pseudo-redshift
  74. GRB050306: optical afterglow not confirmed
  75. GRB 050525: BART optical observation
  76. GRB 050525A: BOOTES simultaneous optical observations
  77. GRB 050525A: Swift-BAT refined analysis
  78. GRB050525: Optical observations
  79. GRB 050525B: INTEGRAL shows it is unrelated to GRB050525A
  80. Konus-Wind observation of GRB 050525
  81. GRB 050525: TAROT observations of the early afterglow
  82. INTEGRAL detection of GRB 050525
  83. GRB 050525, infrared observations
  84. GRB 050525: observatons of the optical afterglow
  85. GRB050525: ROTSE-III Refined Analysis
  86. GRB 050525: Swift Detection of a Bright, Possibly Short Burst
  87. XRF050522: Radio Observations
  88. Swift/UVOT observation of XRF 050522
  89. GRB 050509A: Further I-band imaging
  90. GRB050522,optical observation
  91. GRB050520,optical observation
  92. XRF 050522: Continued NIR P200 Monitoring
  93. RBO Observations of GRB050522
  94. Recent GRB BVRcIc field photometry
  95. GRB050520: Radio Observations
  96. XRF 050522: Swift XRT observation
  97. XRF050522, BVRcIc field photometry
  98. XRF050522: Optical Observations
  99. XRF050522: Near-infrared Observations
  100. GRB 050520: VLT/ULTRACAM observations

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