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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"

19260 results found.

  1. GRB050805a: MASTER optical candidat
  2. GRB 050803: Swift-BAT refined analysis
  3. GRB 050803: early Swift XRT analysis results
  4. GCN GRB observation 050713A
  5. GRB050730: FORS1 and UVES/VLT low- and high-resolution spectroscopy
  6. GRB 050802: early Swift XRT analysis results
  7. GRB 050802: Swift/UVOT observations
  8. GRB 050802: Swift-BAT refined analysis
  9. GRB050801: Swift/UVOT Optical and UV detections
  10. GRB 050730: Preliminary Analysis of MIKE Spectrum
  11. GCN 050801: early Swift XRT analysis results
  12. GRB 050801: Swift-BAT refined analysis
  13. GRB 050730: XRT refined analysis
  14. GRB050730: Refined BAT analysis of the Swift-BAT burst
  15. GRB 050730: Swift XRT afterglow observations
  16. GRB 050730, optical candidate
  17. GRB050730: Swift-BAT detection of a weak burst
  18. GRB050713b: Maidanak optical observations
  19. GRB 050724: Secure Host Redshift from Keck
  20. GRB 050724: WHT optical observations
  21. GRB050713: analysis of the XMM-Newton observation
  22. Swift-BAT trigger 147918 is not a real GRB
  23. GRB050724: VLT observations of the variable source
  24. GRB050726: Swift-BAT detection of a weak burst
  25. GRB 050724: Optical Variability in Nearby Galaxy
  26. GRB 050724: Optical imaging/astrometry
  27. GRB 050724: early Swift XRT analysis results
  28. GRB050724: Refined analysis of the Swift-BAT possible short burst
  29. GRB 050721A: Swift-BAT refined analysis
  30. GRB 050721A: Early Swift XRT analysis results
  31. GRB050721A: optical decay
  32. GRB 050721: optical afterglow confirmed
  33. GRB 050709: Refined Spectral and Temporal Properties
  34. GRB 050714B: VLT R-band observations
  35. GRB 050717: Swift-BAT refined analysis
  36. GRB 050716: Refined XRT analysis.
  37. GRB050716: Refined analysis of the Swift-BAT burst
  38. GRB 050716: Lulin B and R band optical observations
  39. GRB050715: Refined analysis of the Swift-BAT burst
  40. GRB 050715: Swift-BAT detection
  41. Konus-Wind observation of GRB 050713A
  42. GRB050714B: Refined analysis of the Swift-BAT burst
  43. GRB 050714B: optical afterglow
  44. GRB 050714, optical observations
  45. GRB 050713A: XRT refined analysis
  46. GRB050713b: XRT refined analysis
  47. GRB 050713B: Swift-BAT Refined Analysis
  48. GRB 050713A : Swift-BAT Refined Analysis
  49. GRB050712: Swift UVOT Observation of Afterglow Emission
  50. GRB 050713A : Lulin R-band observation
  51. GRB 050713b : Lulin R-band observations
  52. RBO RI observations of GRB 050713A
  53. GRB 050713B
  54. GRB050709 : Chandra source optical counterpart
  55. GRB050713: Liverpool Telescope prompt observations
  56. GRB050709: Candidate X-ray Afterglow from Chandra
  57. GRB050713: possible I-band afterglow
  58. GRB050712: XRT refined analysis
  59. GRB 050709: Swift UVOT and XRT observations
  60. GRB 050712: Swift-BAT Refined Analysis
  61. GRB050709, optical observations
  62. GRB 050525a: ARC 3.5-Meter SPIcam Field Calibration
  63. GRB 050626: Swift XRT observations
  64. GRB 050701: Refined XRT analysis
  65. GRB050701: Swift-BAT Refined analysis
  66. Swift trigger 143708 is really GRB 050701
  67. H11603: An X-ray flare from V4641 Sgr, or a possible XRF
  68. GRB 050626 - a long GRB detected with INTEGRAL
  69. H3800 and H3801 on 2005 June 11: two bursts from SGR1806-20 localized by HETE
  70. Konus-Wind observation of an intermediate burst from SGR 1806-20
  71. GRB 050416(a): Host Galaxy Redshift Determination
  72. GRB 050607 optical decay
  73. Swift/UVOT observations of GRB050607
  74. GRB 050607: PROMPT VRcIc Observations
  75. GRB 050607: RAPTOR-S Early Optical Limits
  76. GRB 050607: Optical decay and spectral slope
  77. Optical Afterglow of GRB 050607
  78. GRB050607: Swift Detection of a long GRB
  79. GRB 050603: prediction of t_break
  80. GRB 050603 - XRT data analysis of the first day
  81. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  82. Swift/BAT Detection of GRB050603
  83. GRB050528, XRT observations
  84. GRB050528: updated Liverpool Telescope limits
  85. Swift-BAT GRB 050528: a soft burst
  86. GRB050504: Ashra-P2/3 monitor and Ashra-AFT response
  87. GRB 050509b: refined XRT/Chandra afterglow position analysis
  88. GRB 050525, spectral lag pseudo-redshift
  89. GRB 050525A: BOOTES simultaneous optical observations
  90. GRB 050525A: Swift-BAT refined analysis
  91. GRB050525: Optical observations
  92. Konus-Wind observation of GRB 050525
  93. INTEGRAL detection of GRB 050525
  94. GRB050525: ROTSE-III Refined Analysis
  95. GRB 050525: Swift Detection of a Bright, Possibly Short Burst
  96. RBO Observations of GRB050522
  97. GRB 050520: Swift XRT refined analysis
  98. XRF050509C: Chandra Afterglow Detection
  99. GRB 050520: TAROT optical limit
  100. GRB 050504: Swift XRT afterglow candidate has faded

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