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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"

28234 results found.

  1. GRB 060825: P60 Observations
  2. GRB 060825: Swift detection of a burst
  3. GRB060801: host galaxy redshift
  4. GRB060729: analysis of XMM-Newton observation
  5. GRB 060729, SMARTS optical/IR observations
  6. GRB 060813: A long, bright GRB detected with Suzaku WAM
  7. Konus-Wind observation of GRB 060814
  8. GRB 060814: Refined analysis of the Swift-BAT burst
  9. GRB 060814: P60 Observations
  10. GRB 060814: P200 NIR Observations
  11. GRB060805B: optical observations
  12. GRB 060814: Swift XRT refined analysis
  13. GRB 060814: VLT optical limits
  14. GRB 060814 - SDSS Pre-Burst Observations
  15. GRB 060814: TAROT optical observations
  16. GRB 060814: Swift detection of a bright burst
  17. Konus-Wind observation of GRB 060813
  18. GRB 060813: Swift XRT refined analysis
  19. GRB 060813: Refined analysis of the Swift-BAT burst
  20. GRB 060813: Swift detection of a burst
  21. GRB051109B: Late-time Radio Observations
  22. Swift detection of an outburst from the 4U 1246-58 LMXB burster
  23. GRB060807: Possible Highly Significant X-ray Emission Lines
  24. GRB 060729: An update on the Swift XRT and UVOT observations
  25. GRB060717: optical observations
  26. GRB060807: Optical limiting magnitudes
  27. GRB 060805B: XRT Team Analysis
  28. GRB060806 is similar to previous activity of SGR1806-20
  29. GRB 060807: XRT Team refined analysis
  30. GRB 060807: Refined analysis of the Swift-BAT burst
  31. GRB060807: optical afterglow candidate
  32. IPN triangulation of GRB060806 (long, exceptionally bright)
  33. GRB060807 - SDSS Pre-burst Observations
  34. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  35. GRB 060805B: Swift/UVOT Upper Limits
  36. GRB 060807, optical observation
  37. GRB 060807: Kanazawa R-band observation
  38. GRB 060807: Swift detection of a burst
  39. GRB060805 Liverpool Telescope observations
  40. GRB 060805: XRT Team Refined Analysis
  41. GRB 060805: Swift-BAT Refined Analysis
  42. GRB 060805: Swift/UVOT Upper Limits
  43. GRB 060805: P60 Observations
  44. GRB 060805 - SDSS Pre-Burst Observations
  45. GRB 060804: Swift UVOT observations
  46. GRB 060804: Swift-XRT Team Refined Analysis
  47. GRB 060804: Refined analysis of the Swift-BAT burst
  48. GRB 060804: Swift detection of a burst with a possible UVOT counterpart
  49. GRB 060728: Upper limits of the X-ray emission
  50. GRB 060801: no variability of optical sources
  51. GRB 060801: XRT/SDSS Frame Offset and Refined XRT Position
  52. GRB060801: Radio Observations
  53. GRB 051109B: Bright spiral host galaxy at low redshift
  54. GRB060801: Swift/UVOT Upper Limits
  55. GRB 060801: optical observations at Hanle and Calar Alto
  56. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  57. GRB 060801, optical observation
  58. GRB 060801: Kanazawa Optical Observation
  59. GRB 060719: TORTOREM optical upper limits
  60. GRB 060729: Refined analysis of the Swift-BAT burst
  61. GRB 060729: Swift-XRT refined analysis
  62. GRB 060729: Swift/UVOT Observations
  63. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  64. GRB 060728: Swift/UVOT Upper Limits
  65. GRB 060728, SMARTS optical/IR observations
  66. Swift/XRT preliminary analysis
  67. GRB 060728: Swift detection of a burst
  68. GRB 060714: Swift/UVOT Observations
  69. GRB060719: prompt NIR observations with REM
  70. GRB 060714: NOT observations
  71. GRB 060719: near-infrared afterglow
  72. GRB 060719: correction to the coordinates reported in GCN 5347
  73. GRB 060522: VLA observation
  74. GRB 060719: Swift/UVOT Upper Limits
  75. GRB 060719: VLT/ISAAC observations
  76. GRB 060719: Refined analysis of the Swift-BAT burst
  77. GRB 060719: XRT refined analysis
  78. GRB 060719: further analysis of VLT observations
  79. GRB060719: REM NIR Observations
  80. GRB 060719: VLT observations
  81. GRB 060719: LCO optical observations
  82. GRB 060719: Swift detection of a burst
  83. GRB 060717: Swift XRT refined analysis
  84. GRB 060714: Refined analysis of the Swift-BAT burst
  85. GRB060717: Swift/UVOT upper limits
  86. GRB 060717: Swift-BAT refined analysis
  87. GRB060717 - SDSS Pre-burst Observations
  88. GRB 060714: REM infrared observations
  89. GRB 060717, optical observation
  90. GRB 060714 : Liverpool Telescope Observations
  91. GRB 060714: Swift XRT refined analysis
  92. GRB 060708: VLT spectroscopy
  93. Swift trigger 219136 is probably not a GRB
  94. GRB 060714, optical observation
  95. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  96. GRB060712: P60 Observations
  97. GRB 060712: XRT refined analysis
  98. GRB 060712: Swift/UVOT Upper Limits
  99. GRB060526: optical observations
  100. GRB 060712: XRT refined position

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