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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"

19607 results found.

  1. Swift detects a hard X-ray burst from AXP CXOU J164710.2-455216
  2. GRB060919: Swift/UVOT optical observations
  3. GRB 060919, Swift-BAT refined analysis
  4. GRB060919: XRT refined analysis
  5. GRB 060919: TAROT optical observations
  6. GRB 060919: Swift detection of a burst
  7. GRB 060912A: VLA Observation
  8. GRB060825: MAGIC telescope GeV observation
  9. Konus-Wind observation of GRB 060912
  10. GRB060912: Swift/UVOT Observations
  11. GRB060912: OPTIMA-Burst optical observations
  12. GRB 060912: Swift XRT Team Refined Analysis
  13. GRB 060912, Swift-BAT refined analysis
  14. GRB 060912: Swift detection of a burst with an optical afterglow
  15. VLA observations of GRB 060908
  16. GRB 060908, Swift/XRT refined analysis
  17. GRB 060908: Swift/UVOT Observations
  18. GRB 060908, Swift-BAT refined analysis
  19. GRB 060908 - SDSS Pre-burst Observations
  20. GRB 060908: Swift detection of a burst with a bright optical counterpart
  21. GRB 060904A: Suzaku/WAM observation of the prompt emission
  22. GRB060904b optical detections (delayed report due to internet outage)
  23. GRB 060906: Early RAPTOR optical limits
  24. GRB 060906, Swift-BAT refined spectral analysis
  25. GRB 060906: Swift/XRT Refined Analysis
  26. GRB 060906: Swift-UVOT observations
  27. VLT redshift of GRB 060906
  28. GRB 060906, Swift-BAT refined analysis
  29. GRB 060906: KAIT observations
  30. GRB 060906 (?): P60 Optical Afterglow Candidate
  31. GRB 060906: Swift detection of a probable burst
  32. GRB 060904A Milagro GeV/TeV Observations
  33. GRB060904A: Swift/UVOT optical observations
  34. GRB 060904A: pseudo-z from spectral parameters of the prompt emission
  35. GRB 060904B: Swift-BAT refined analysis
  36. GRB060904b: Optical observations with Swift/UVOT
  37. Konus-Wind observation of GRB 060904A
  38. GRB 060904B: Swift-XRT refined analysis
  39. GRB 060904A: Refined analysis of the Swift-BAT burst
  40. GRB 060904A: Swift-XRT refined analysis
  41. GRB 060904A: Suzaku-XIS and -HXD observation plan
  42. GRB 060904B: Optical observations at Crni Vrh
  43. GRB060904B: Watcher observations
  44. GRB 060904B BOOTES-IR and 1.5m OSN observations
  45. GRB 060904B: TAROT optical counterpart observations
  46. GRB060904B - SDSS Pre-Burst Observations
  47. GRB 060904: TAROT optical observations
  48. GRB 060904B: Swift detection of a burst with optical counterpart
  49. GRB 060904B: ROTSE-III Detection of Optical Counterpart
  50. GRB060904 - SDSS Pre-Burst Observations
  51. GRB 060904: Swift detection of a bright burst
  52. 060901: Swift UVOT followup observations
  53. GRB 060901: Swift/XRT Refined Analysis
  54. GRB 060901: Swift/XRT Position
  55. GRB 060604: VLA Observation
  56. GRB 060814: Suzaku/WAM observation of the prompt emission
  57. GRB 060605: VLA Observation
  58. GRB 060707: VLA observation
  59. GRB 060825: VLA observations
  60. GRB 060825: pseudo-z from spectral parameters of the prompt emission
  61. Swift-BAT trigger 226614 is not a GRB
  62. GRB060826 - SDSS Pre-Burst Observations
  63. GRB 060826(?): Swift detection of a possible burst
  64. GRB 060825: XRT Team Refined Analysis
  65. GRB 060825: Swift-BAT Refined Analysis
  66. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  67. GRB060825: Liverpool Telescope optical observations
  68. GRB 060825: TAROT optical observations
  69. GRB060825: BOOTES-IR optical observations
  70. GRB 060825: Swift detection of a burst
  71. GRB060729: analysis of XMM-Newton observation
  72. GRB 060814: pseudo-z from spectral parameters of the prompt
  73. Radio observations of GRB 060719
  74. GRB060814: Break in the XRT light curve
  75. GRB060813: Break in the XRT light curve
  76. GRB 060813: A long, bright GRB detected with Suzaku WAM
  77. Konus-Wind observation of GRB 060814
  78. GRB 060814: Refined analysis of the Swift-BAT burst
  79. GRB060805B: optical observations
  80. GRB060814: Swift/UVOT upper limits
  81. GRB 060813: pseudo-z from spectral parameters of the prompt
  82. GRB 060814: Swift XRT refined analysis
  83. GRB 060814 - SDSS Pre-Burst Observations
  84. GRB 060814: TAROT optical observations
  85. GRB 060814: Swift detection of a bright burst
  86. Konus-Wind observation of GRB 060813
  87. GRB060813: Swift/UVOT upper limits
  88. GRB 060813: Swift XRT refined analysis
  89. GRB 060813: Refined analysis of the Swift-BAT burst
  90. GRB 060813: Swift detection of a burst
  91. Image of the dust-scattering halo around SGR 1806-20
  92. A dust-scattering halo detected around SGR 1806-20
  93. Swift detection of an outburst from the 4U 1246-58 LMXB burster
  94. GRB060714: optical observations
  95. GRB 060729: An update on the Swift XRT and UVOT observations
  96. GRB060807: Optical limiting magnitudes
  97. GRB 060805B: optical observation at Sierra Nevada
  98. GRB 060805B: XRT Team Analysis
  99. GRB 060807: UVOT Upper limits
  100. GRB 060807: XRT Team refined analysis

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