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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"

19613 results found.

  1. GRB 060923: KAIT observations
  2. GRB 060923: Swift detection of a burst
  3. Swift detection of IGR J17497-2821 (trigger 230504)
  4. Swift detects a hard X-ray burst from AXP CXOU J164710.2-455216
  5. GRB060919: Swift/UVOT optical observations
  6. GRB 060919, Swift-BAT refined analysis
  7. GRB060919: XRT refined analysis
  8. GRB 060919: TAROT optical observations
  9. GRB 060919: Swift detection of a burst
  10. GRB 060912A: VLA Observation
  11. GRB060825: MAGIC telescope GeV observation
  12. Konus-Wind observation of GRB 060912
  13. GRB060912: Swift/UVOT Observations
  14. GRB060912: OPTIMA-Burst optical observations
  15. GRB 060912: Swift XRT Team Refined Analysis
  16. GRB 060912, Swift-BAT refined analysis
  17. GRB 060912: Swift detection of a burst with an optical afterglow
  18. VLA observations of GRB 060908
  19. GRB 060908, Swift/XRT refined analysis
  20. GRB 060908: Swift/UVOT Observations
  21. GRB 060908, Swift-BAT refined analysis
  22. GRB 060908 - SDSS Pre-burst Observations
  23. GRB 060908: Swift detection of a burst with a bright optical counterpart
  24. GRB 060904A: Suzaku/WAM observation of the prompt emission
  25. GRB060904b optical detections (delayed report due to internet outage)
  26. GRB 060906: Early RAPTOR optical limits
  27. GRB 060906, Swift-BAT refined spectral analysis
  28. GRB 060906: Swift/XRT Refined Analysis
  29. GRB 060906: Swift-UVOT observations
  30. VLT redshift of GRB 060906
  31. GRB 060906, Swift-BAT refined analysis
  32. GRB 060906: KAIT observations
  33. GRB 060906 (?): P60 Optical Afterglow Candidate
  34. GRB 060906: Swift detection of a probable burst
  35. GRB 060904A Milagro GeV/TeV Observations
  36. GRB060904A: Swift/UVOT optical observations
  37. GRB 060904A: pseudo-z from spectral parameters of the prompt emission
  38. GRB 060904B: Swift-BAT refined analysis
  39. GRB060904b: Optical observations with Swift/UVOT
  40. Konus-Wind observation of GRB 060904A
  41. GRB 060904B: Swift-XRT refined analysis
  42. GRB 060904A: Refined analysis of the Swift-BAT burst
  43. GRB 060904A: Swift-XRT refined analysis
  44. GRB 060904A: Suzaku-XIS and -HXD observation plan
  45. GRB 060904B: Optical observations at Crni Vrh
  46. GRB060904B: Watcher observations
  47. GRB 060904B BOOTES-IR and 1.5m OSN observations
  48. GRB 060904B: TAROT optical counterpart observations
  49. GRB060904B - SDSS Pre-Burst Observations
  50. GRB 060904: TAROT optical observations
  51. GRB 060904B: Swift detection of a burst with optical counterpart
  52. GRB 060904B: ROTSE-III Detection of Optical Counterpart
  53. GRB060904 - SDSS Pre-Burst Observations
  54. GRB 060904: Swift detection of a bright burst
  55. 060901: Swift UVOT followup observations
  56. GRB 060901: Swift/XRT Refined Analysis
  57. GRB 060901: Swift/XRT Position
  58. GRB 060604: VLA Observation
  59. GRB 060814: Suzaku/WAM observation of the prompt emission
  60. GRB 060605: VLA Observation
  61. GRB 060707: VLA observation
  62. GRB 060825: VLA observations
  63. GRB 060825: pseudo-z from spectral parameters of the prompt emission
  64. Swift-BAT trigger 226614 is not a GRB
  65. GRB060826 - SDSS Pre-Burst Observations
  66. GRB 060826(?): Swift detection of a possible burst
  67. GRB 060825: XRT Team Refined Analysis
  68. GRB 060825: Swift-BAT Refined Analysis
  69. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  70. GRB060825: Liverpool Telescope optical observations
  71. GRB 060825: TAROT optical observations
  72. GRB060825: BOOTES-IR optical observations
  73. GRB 060825: Swift detection of a burst
  74. GRB060729: analysis of XMM-Newton observation
  75. GRB 060814: pseudo-z from spectral parameters of the prompt
  76. Radio observations of GRB 060719
  77. GRB060814: Break in the XRT light curve
  78. GRB060813: Break in the XRT light curve
  79. GRB 060813: A long, bright GRB detected with Suzaku WAM
  80. Konus-Wind observation of GRB 060814
  81. GRB 060814: Refined analysis of the Swift-BAT burst
  82. GRB060805B: optical observations
  83. GRB060814: Swift/UVOT upper limits
  84. GRB 060813: pseudo-z from spectral parameters of the prompt
  85. GRB 060814: Swift XRT refined analysis
  86. GRB 060814 - SDSS Pre-Burst Observations
  87. GRB 060814: TAROT optical observations
  88. GRB 060814: Swift detection of a bright burst
  89. Konus-Wind observation of GRB 060813
  90. GRB060813: Swift/UVOT upper limits
  91. GRB 060813: Swift XRT refined analysis
  92. GRB 060813: Refined analysis of the Swift-BAT burst
  93. GRB 060813: Swift detection of a burst
  94. Image of the dust-scattering halo around SGR 1806-20
  95. A dust-scattering halo detected around SGR 1806-20
  96. Swift detection of an outburst from the 4U 1246-58 LMXB burster
  97. GRB060714: optical observations
  98. GRB 060729: An update on the Swift XRT and UVOT observations
  99. GRB060807: Optical limiting magnitudes
  100. GRB 060805B: optical observation at Sierra Nevada

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