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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"

27154 results found.

  1. GRB 060904: TAROT optical observations
  2. GRB 060904B: Swift detection of a burst with optical counterpart
  3. GRB 060904B: ROTSE-III Detection of Optical Counterpart
  4. GRB060904 - SDSS Pre-Burst Observations
  5. GRB 060904: Swift detection of a bright burst
  6. GRB 060901: Swift/XRT Refined Analysis
  7. Two bright bursts from SGR 1806-20 detected with IBAS
  8. GRB 060814: Suzaku/WAM observation of the prompt emission
  9. Swift-BAT trigger 226614 is not a GRB
  10. GRB060826 - SDSS Pre-Burst Observations
  11. GRB 060826(?): Swift detection of a possible burst
  12. GRB 060825: XRT Team Refined Analysis
  13. GRB 060825: Swift-BAT Refined Analysis
  14. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  15. GRB060825: Liverpool Telescope optical observations
  16. GRB 060825: TAROT optical observations
  17. GRB 060825: Swift detection of a burst
  18. GRB060814: Break in the XRT light curve
  19. GRB060813: Break in the XRT light curve
  20. GRB 060813: A long, bright GRB detected with Suzaku WAM
  21. Konus-Wind observation of GRB 060814
  22. GRB 060814: Refined analysis of the Swift-BAT burst
  23. GRB060814: Swift/UVOT upper limits
  24. GRB 060814: Swift XRT refined analysis
  25. GRB 060814 - SDSS Pre-Burst Observations
  26. GRB 060814: TAROT optical observations
  27. GRB 060814: Swift detection of a bright burst
  28. Konus-Wind observation of GRB 060813
  29. GRB060813: Swift/UVOT upper limits
  30. GRB 060813: Swift XRT refined analysis
  31. GRB 060813: Refined analysis of the Swift-BAT burst
  32. GRB 060813: Swift detection of a burst
  33. Swift detection of an outburst from the 4U 1246-58 LMXB burster
  34. GRB060807: Possible Highly Significant X-ray Emission Lines
  35. GRB 060729: An update on the Swift XRT and UVOT observations
  36. GRB060807: Optical limiting magnitudes
  37. GRB 060805B: XRT Team Analysis
  38. GRB 060807: UVOT Upper limits
  39. GRB 060807: XRT Team refined analysis
  40. GRB 060807: Refined analysis of the Swift-BAT burst
  41. GRB060807: optical upper limit in white light
  42. GRB060807 - SDSS Pre-burst Observations
  43. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  44. GRB 060807, optical observation
  45. GRB 060807: Kanazawa R-band observation
  46. GRB 060807: Swift detection of a burst
  47. GRB 060805: optical upper limit in R
  48. GRB 060805: XRT Team Refined Analysis
  49. GRB 060805: Swift-BAT Refined Analysis
  50. GRB 060805: Swift/UVOT Upper Limits
  51. GRB 060805: KAIT observations
  52. GRB 060805 - SDSS Pre-Burst Observations
  53. GRB 060805: Swift detection of a burst
  54. GRB 060804: Swift UVOT observations
  55. GRB 060804: Swift-XRT Team Refined Analysis
  56. GRB 060804: Refined analysis of the Swift-BAT burst
  57. GRB 060804: Swift detection of a burst with a possible UVOT counterpart
  58. GRB 060728: Upper limits of the X-ray emission
  59. GRB060801: Swift/UVOT Upper Limits
  60. GRB060801: optical upper limit in R
  61. GRB 060801: Swift XRT refined analysis
  62. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  63. GRB 060801: Kanazawa Optical Observation
  64. GRB 060801: Swift detection of a short burst
  65. GRB060729: ROTSE-III Observations of the Slow Optical Decay
  66. GRB 060218 / SN 2006aj Nebular Spectrum
  67. Swift-BAT trigger 221873 is not a GRB or a Transient
  68. GRB 060719: TORTOREM optical upper limits
  69. GRB 060729: Refined analysis of the Swift-BAT burst
  70. GRB 060729: Swift/UVOT Observations
  71. GRB 060729: ROTSE-III Detection of Optical Counterpart
  72. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  73. GRB 060728: Swift/UVOT Upper Limits
  74. GRB 060728: Refined analysis of the Swift-BAT burst
  75. Swift/XRT preliminary analysis
  76. GRB 060728: Swift detection of a burst
  77. GRB 060714: Swift/UVOT Observations
  78. GRB060719: prompt NIR observations with REM
  79. GRB 060719: Swift/UVOT Upper Limits
  80. GRB 060719: VLT/ISAAC observations
  81. GRB 060719: Refined analysis of the Swift-BAT burst
  82. GRB 060719: XRT refined analysis
  83. GRB 060719: further analysis of VLT observations
  84. GRB 060719: optical limit by Pi-of-the-Sky
  85. GRB060719: FRAM early follow-up limit
  86. GRB060719: REM NIR Observations
  87. GRB 060719: Swift detection of a burst
  88. GRB 060714: Refined analysis of the Swift-BAT burst
  89. GRB060717: Swift/UVOT upper limits
  90. GRB 060717: Swift XRT refined position
  91. GRB 060717: Swift-BAT refined analysis
  92. GRB060717 - SDSS Pre-burst Observations
  93. GRB 060714: REM infrared observations
  94. GRB 060717: Swift detection of a burst
  95. GRB 060714: Swift XRT refined analysis
  96. GRB060708: MARGE low resolution spectrum observations
  97. Swift-BAT trigger 219136 is not a GRB
  98. Swift trigger 219136 is probably not a GRB
  99. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  100. GRB 060605: SkyNet Optical Limits

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