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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"

19261 results found.

  1. GRB050805b: MASTER optical observations
  2. GRB050805a: MASTER optical candidat
  3. GRB 050803: Swift-BAT refined analysis
  4. GRB 050803: early Swift XRT analysis results
  5. GCN GRB observation 050713A
  6. GRB050730: FORS1 and UVES/VLT low- and high-resolution spectroscopy
  7. GRB 050802: early Swift XRT analysis results
  8. GRB 050802: Swift/UVOT observations
  9. GRB 050802: Swift-BAT refined analysis
  10. GRB050801: Swift/UVOT Optical and UV detections
  11. GRB 050730: Preliminary Analysis of MIKE Spectrum
  12. GCN 050801: early Swift XRT analysis results
  13. GRB 050801: Swift-BAT refined analysis
  14. GRB 050730: XRT refined analysis
  15. GRB050730: Refined BAT analysis of the Swift-BAT burst
  16. GRB 050730: Swift XRT afterglow observations
  17. GRB 050730, optical candidate
  18. GRB050730: Swift-BAT detection of a weak burst
  19. GRB050713b: Maidanak optical observations
  20. GRB 050724: Secure Host Redshift from Keck
  21. GRB 050724: WHT optical observations
  22. GRB050713: analysis of the XMM-Newton observation
  23. Swift-BAT trigger 147918 is not a real GRB
  24. GRB050724: VLT observations of the variable source
  25. GRB050726: Swift-BAT detection of a weak burst
  26. GRB 050724: Optical Variability in Nearby Galaxy
  27. GRB 050724: Optical imaging/astrometry
  28. GRB 050724: early Swift XRT analysis results
  29. GRB050724: Refined analysis of the Swift-BAT possible short burst
  30. GRB 050721A: Swift-BAT refined analysis
  31. GRB 050721A: Early Swift XRT analysis results
  32. GRB050721A: optical decay
  33. GRB 050721: optical afterglow confirmed
  34. GRB 050709: Refined Spectral and Temporal Properties
  35. GRB 050714B: VLT R-band observations
  36. GRB 050717: Swift-BAT refined analysis
  37. GRB 050716: Refined XRT analysis.
  38. GRB050716: Refined analysis of the Swift-BAT burst
  39. GRB 050716: Lulin B and R band optical observations
  40. GRB050715: Refined analysis of the Swift-BAT burst
  41. GRB 050715: Swift-BAT detection
  42. Konus-Wind observation of GRB 050713A
  43. GRB050714B: Refined analysis of the Swift-BAT burst
  44. GRB 050714B: optical afterglow
  45. GRB 050714, optical observations
  46. GRB 050713A: XRT refined analysis
  47. GRB050713b: XRT refined analysis
  48. GRB 050713B: Swift-BAT Refined Analysis
  49. GRB 050713A : Swift-BAT Refined Analysis
  50. GRB050712: Swift UVOT Observation of Afterglow Emission
  51. GRB 050713A : Lulin R-band observation
  52. GRB 050713b : Lulin R-band observations
  53. RBO RI observations of GRB 050713A
  54. GRB 050713B
  55. GRB050709 : Chandra source optical counterpart
  56. GRB050713: Liverpool Telescope prompt observations
  57. GRB050709: Candidate X-ray Afterglow from Chandra
  58. GRB050713: possible I-band afterglow
  59. GRB050712: XRT refined analysis
  60. GRB 050709: Swift UVOT and XRT observations
  61. GRB 050712: Swift-BAT Refined Analysis
  62. GRB050709, optical observations
  63. GRB 050525a: ARC 3.5-Meter SPIcam Field Calibration
  64. GRB 050626: Swift XRT observations
  65. GRB 050701: Refined XRT analysis
  66. GRB050701: Swift-BAT Refined analysis
  67. Swift trigger 143708 is really GRB 050701
  68. H11603: An X-ray flare from V4641 Sgr, or a possible XRF
  69. GRB 050626 - a long GRB detected with INTEGRAL
  70. H3800 and H3801 on 2005 June 11: two bursts from SGR1806-20 localized by HETE
  71. Konus-Wind observation of an intermediate burst from SGR 1806-20
  72. GRB 050416(a): Host Galaxy Redshift Determination
  73. GRB 050607 optical decay
  74. Swift/UVOT observations of GRB050607
  75. GRB 050607: PROMPT VRcIc Observations
  76. GRB 050607: RAPTOR-S Early Optical Limits
  77. GRB 050607: Optical decay and spectral slope
  78. Optical Afterglow of GRB 050607
  79. GRB050607: Swift Detection of a long GRB
  80. GRB 050603: prediction of t_break
  81. GRB 050603 - XRT data analysis of the first day
  82. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  83. Swift/BAT Detection of GRB050603
  84. GRB050528, XRT observations
  85. GRB050528: updated Liverpool Telescope limits
  86. Swift-BAT GRB 050528: a soft burst
  87. GRB050504: Ashra-P2/3 monitor and Ashra-AFT response
  88. GRB 050509b: refined XRT/Chandra afterglow position analysis
  89. GRB 050525, spectral lag pseudo-redshift
  90. GRB 050525A: BOOTES simultaneous optical observations
  91. GRB 050525A: Swift-BAT refined analysis
  92. GRB050525: Optical observations
  93. Konus-Wind observation of GRB 050525
  94. INTEGRAL detection of GRB 050525
  95. GRB050525: ROTSE-III Refined Analysis
  96. GRB 050525: Swift Detection of a Bright, Possibly Short Burst
  97. RBO Observations of GRB050522
  98. GRB 050520: Swift XRT refined analysis
  99. XRF050509C: Chandra Afterglow Detection
  100. GRB 050520: TAROT optical limit

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