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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"

28119 results found.

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

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