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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"

29078 results found.

  1. GRB060904A: Swift/UVOT optical observations
  2. GRB 060904A: pseudo-z from spectral parameters of the prompt emission
  3. GRB 060904B: Swift-BAT refined analysis
  4. GRB060904b: Optical observations with Swift/UVOT
  5. Konus-Wind observation of GRB 060904A
  6. GRB 060904B: Swift-XRT refined analysis
  7. GRB 060904A: Refined analysis of the Swift-BAT burst
  8. GRB 060904A: Swift-XRT refined analysis
  9. GRB 060904B: Optical observations at Crni Vrh
  10. GRB 060904B: TAROT optical counterpart observations
  11. GRB060904B - SDSS Pre-Burst Observations
  12. GRB 060904: TAROT optical observations
  13. GRB 060904B: Swift detection of a burst with optical counterpart
  14. GRB 060904B: ROTSE-III Detection of Optical Counterpart
  15. GRB060904 - SDSS Pre-Burst Observations
  16. GRB 060904: Swift detection of a bright burst
  17. GRB 060901: Swift/XRT Refined Analysis
  18. GRB 060814: Suzaku/WAM observation of the prompt emission
  19. Swift-BAT trigger 226614 is not a GRB
  20. GRB060826 - SDSS Pre-Burst Observations
  21. GRB 060826(?): Swift detection of a possible burst
  22. GRB 060825: XRT Team Refined Analysis
  23. GRB 060825: Swift-BAT Refined Analysis
  24. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  25. GRB060825: Liverpool Telescope optical observations
  26. GRB 060825: TAROT optical observations
  27. GRB 060825: Swift detection of a burst
  28. GRB060814: Break in the XRT light curve
  29. GRB060813: Break in the XRT light curve
  30. GRB 060813: A long, bright GRB detected with Suzaku WAM
  31. Konus-Wind observation of GRB 060814
  32. GRB 060814: Refined analysis of the Swift-BAT burst
  33. GRB060814: Swift/UVOT upper limits
  34. GRB 060814: Swift XRT refined analysis
  35. GRB 060814 - SDSS Pre-Burst Observations
  36. GRB 060814: TAROT optical observations
  37. GRB 060814: Swift detection of a bright burst
  38. Konus-Wind observation of GRB 060813
  39. GRB060813: Swift/UVOT upper limits
  40. GRB 060813: Swift XRT refined analysis
  41. GRB 060813: Refined analysis of the Swift-BAT burst
  42. GRB 060813: Swift detection of a burst
  43. Swift detection of an outburst from the 4U 1246-58 LMXB burster
  44. GRB060807: Possible Highly Significant X-ray Emission Lines
  45. GRB060807: Optical limiting magnitudes
  46. GRB 060805B: XRT Team Analysis
  47. GRB 060807: UVOT Upper limits
  48. GRB 060807: XRT Team refined analysis
  49. GRB 060807: Refined analysis of the Swift-BAT burst
  50. GRB060807: optical upper limit in white light
  51. GRB060807 - SDSS Pre-burst Observations
  52. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  53. GRB 060807, optical observation
  54. GRB 060807: Kanazawa R-band observation
  55. GRB 060807: Swift detection of a burst
  56. GRB 060805: optical upper limit in R
  57. GRB 060805: XRT Team Refined Analysis
  58. GRB 060805: Swift-BAT Refined Analysis
  59. GRB 060805: Swift/UVOT Upper Limits
  60. GRB 060805: KAIT observations
  61. GRB 060805 - SDSS Pre-Burst Observations
  62. GRB 060805: Swift detection of a burst
  63. GRB 060804: Swift UVOT observations
  64. GRB 060804: Swift-XRT Team Refined Analysis
  65. GRB 060804: Refined analysis of the Swift-BAT burst
  66. GRB 060804: Swift detection of a burst with a possible UVOT counterpart
  67. GRB 060728: Upper limits of the X-ray emission
  68. GRB060801: Swift/UVOT Upper Limits
  69. GRB060801: optical upper limit in R
  70. GRB 060801: Swift XRT refined analysis
  71. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  72. GRB 060801: Kanazawa Optical Observation
  73. GRB 060801: Swift detection of a short burst
  74. GRB060729: ROTSE-III Observations of the Slow Optical Decay
  75. GRB 060218 / SN 2006aj Nebular Spectrum
  76. Swift-BAT trigger 221873 is not a GRB or a Transient
  77. GRB 060719: TORTOREM optical upper limits
  78. GRB 060729: Refined analysis of the Swift-BAT burst
  79. GRB 060729: Swift/UVOT Observations
  80. GRB 060729: ROTSE-III Detection of Optical Counterpart
  81. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  82. GRB 060728: Swift/UVOT Upper Limits
  83. GRB 060728: Refined analysis of the Swift-BAT burst
  84. Swift/XRT preliminary analysis
  85. GRB 060728: Swift detection of a burst
  86. GRB 060714: Swift/UVOT Observations
  87. GRB060719: prompt NIR observations with REM
  88. GRB 060719: Swift/UVOT Upper Limits
  89. GRB 060719: VLT/ISAAC observations
  90. GRB 060719: Refined analysis of the Swift-BAT burst
  91. GRB 060719: XRT refined analysis
  92. GRB 060719: further analysis of VLT observations
  93. GRB 060719: optical limit by Pi-of-the-Sky
  94. GRB060719: FRAM early follow-up limit
  95. GRB060719: REM NIR Observations
  96. GRB 060719: Swift detection of a burst
  97. GRB 060714: Refined analysis of the Swift-BAT burst
  98. GRB060717: Swift/UVOT upper limits
  99. GRB 060717: Swift XRT refined position
  100. GRB 060717: Swift-BAT refined analysis

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