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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"

28097 results found.

  1. GRB 050805b: OHP optical limits
  2. GRB 050805b: TAROT optical limits
  3. GRB050805b: MASTER optical observations
  4. Possible GRB 050805B: Swift-BAT trigger 149131 may be a burst
  5. GRB050805a: MASTER optical candidat
  6. GRB050802: TNG optical observations
  7. GRB050803: Radio Observation
  8. GRB 050803: RTT150 optical observations
  9. GRB050801: Radio Observation
  10. GRB050730: Radio Detection
  11. GRB 050803: Keck Observations
  12. GRB 050803: Swift-BAT refined analysis
  13. GRB 050802.422: Fading of the afterglow and detection of the host
  14. GRB 050803: early Swift XRT analysis results
  15. GRB 050803: TAROT optical limits
  16. GCN GRB observation 050713A
  17. GRB050730: FORS1 and UVES/VLT low- and high-resolution spectroscopy
  18. GRB050802 radio non-detection
  19. GRB 050730: OHP optical observations
  20. GRB 050802: early Swift XRT analysis results
  21. GRB 050802: Swift/UVOT observations
  22. GRB 050802: Swift-BAT refined analysis
  23. GRB050801: Optical photometry and decay index
  24. GRB 050802: Swift Gamma-ray Burst
  25. GRB050801: Swift/UVOT Optical and UV detections
  26. GRB 050730: Preliminary Analysis of MIKE Spectrum
  27. GCN 050801: early Swift XRT analysis results
  28. GRB 050801: Swift-BAT refined analysis
  29. GRB 050730: XRT refined analysis
  30. GRB 050730: early TAROT optical observations
  31. GRB 050730, spectra and optical photometry
  32. GRB050730: Refined BAT analysis of the Swift-BAT burst
  33. GRB 050730 XMM-Newton observation
  34. GRB050730: Swift-BAT detection of a weak burst
  35. GRB050713b: Maidanak optical observations
  36. GRB 050724: Secure Host Redshift from Keck
  37. GRB 050724: WHT optical observations
  38. GRB050713: analysis of the XMM-Newton observation
  39. Swift-BAT trigger 147918 is not a real GRB
  40. GRB050724: VLT observations of the variable source
  41. GRB050709: Second Epoch Chandra Observation
  42. GRB050726: Swift-BAT detection of a weak burst
  43. GRB 050724: Optical Variability in Nearby Galaxy
  44. GRB 050724: J-band observations
  45. GRB 050724: GMOS Imaging and Spectroscopy
  46. GRB050724: Radio Observation
  47. GRB 050724: Optical imaging/astrometry
  48. GRB 050724: Swift/UVOT Upper Limit
  49. GRB050724: Refined analysis of the Swift-BAT possible short burst
  50. GRB 050724: possible host galaxy in DSS
  51. GRB 050721A: Swift-BAT refined analysis
  52. GRB 050721A: Early Swift XRT analysis results
  53. GRB050721A: optical decay
  54. GRB 050721: optical afterglow confirmed
  55. GRB 050709: Refined Spectral and Temporal Properties
  56. GRB050714b: Radio Observation
  57. GRB050712: Radio Observations
  58. GRB050713a: Radio Observation
  59. GRB 050712, Tautenburg optical afterglow observations
  60. Swift-BAT detection of a possible GRB
  61. GRB 050714B: VLT R-band observations
  62. GRB 050717: Additional LCO observations
  63. GRB 050716; J-band observations
  64. GRB 050717: LCO near-IR observations
  65. Swift/UVOT Observations of GRB 050717
  66. GRB 050717: Swift-BAT refined analysis
  67. GRB050717: Swift XRT position
  68. Swift detection of GRB 050717
  69. Swift UVOT Observations of GRB 050716
  70. GRB 050716: Refined XRT analysis.
  71. GRB050716: Refined analysis of the Swift-BAT burst
  72. GRB 050716: Lulin B and R band optical observations
  73. GRB050716, optical observation
  74. GRB050716: Faulkes North Telescope observation
  75. GRB050715: Refined analysis of the Swift-BAT burst
  76. GRB 050715: Swift-BAT detection
  77. GRB 050713b: RTT150 optical observations
  78. GRB050714B: Refined analysis of the Swift-BAT burst
  79. GRB 050714B: optical afterglow
  80. GRB 050714, R-band candidate
  81. GRB 050714, optical observations
  82. GRB 050713A: XRT refined analysis
  83. GRB 050713A: RAPTOR detection of early optical emission
  84. GRB050713B :Swift/UVOT observations
  85. GRB050713b: XRT refined analysis
  86. GRB050712: TNG R-band observations
  87. GRB 050713B: Swift-BAT Refined Analysis
  88. GRB 050713A: Swift/UVOT observation
  89. GRB 050713A : Swift-BAT Refined Analysis
  90. GRB050712: Swift UVOT Observation of Afterglow Emission
  91. GRB 050713A : Lulin R-band observation
  92. GRB 050713A XMM-Newton observation
  93. GRB 050713b : Lulin R-band observations
  94. GRB050713B: Faulkes North Telescope observation
  95. RBO RI observations of GRB 050713A
  96. GRB 050713B
  97. GRB050709 : Chandra source optical counterpart
  98. GRB050713: Liverpool Telescope prompt observations
  99. GRB 050712, optical observations
  100. GRB050709: Candidate X-ray Afterglow from Chandra

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