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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"

14854 results found.

  1. GRB 060901: Watcher observations
  2. GRB 060604: VLA Observation
  3. GRB 060605: VLA Observation
  4. GRB 060707: VLA observation
  5. GRB 060825: VLA observations
  6. GRB 060826(?): Swift detection of a possible burst
  7. GRB 060825: Swift detection of a burst
  8. Radio observations of GRB 060719
  9. GRB 060814: Swift detection of a bright burst
  10. GRB 060813: Swift detection of a burst
  11. Image of the dust-scattering halo around SGR 1806-20
  12. Second VLA limit on new radio point source in SGR 1806-20
  13. Swift detection of an outburst from the 4U 1246-58 LMXB burster
  14. GRB060807: Possible Highly Significant X-ray Emission Lines
  15. GRB 060805B: optical observation at Sierra Nevada
  16. VLA Upper Limit on Outburst of SGR 1806-20
  17. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  18. GRB 060807: Swift detection of a burst
  19. GRB 060805: Swift detection of a burst
  20. GRB 060804: Swift detection of a burst with a possible UVOT counterpart
  21. GRB 060801: optical observations at Hanle and Calar Alto
  22. GRB 060801: Swift detection of a short burst
  23. GRB 060218 / SN 2006aj Nebular Spectrum
  24. GRB 060729: Swift/UVOT Detections
  25. GRB 060729: ROTSE-III Detection of Optical Counterpart
  26. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  27. GRB 060728: Refined analysis of the Swift-BAT burst
  28. GRB 060728: Swift detection of a burst
  29. GRB060614 ATCA Radio Limits
  30. GRB 060218 (SN 2006aj): IR afterglow detection six months after the
  31. GRB 060522: VLA observation
  32. GRB 060719: Swift detection of a burst
  33. GRB 060714: OA fading and a possible host detection
  34. GRB 060717: Swift detection of a burst
  35. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  36. GRB 060712: Swift detection of a burst
  37. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  38. GCN 060708: Swift-UVOT Observations
  39. GRB 060708: Swift detection of a burst with an UVOT countpart
  40. GRB060614: Possible SN Bump in UVOT U Band Light Curve
  41. GRB 060707: Swift detection of a burst
  42. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  43. GRB060614: Detection of the host galaxy but no supernova emission
  44. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  45. GRB 060614: Swift/UVOT Observations
  46. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  47. BAT Trigger #214277 is SGR 1900+14
  48. GRB 060607B: Swift detection of a burst
  49. VLT/UVES observations of GRB 060607
  50. GRB 060607: Swift detection of a burst with bright optical counterpart
  51. GRB 060605: Swift detection of a burst with optical counterpart
  52. GRB 060605: ROTSE-III Detection of Optical Counterpart
  53. GRB060604: Swift/UVOT detections
  54. GRB 060604: Swift detection of a burst with possible optical counterpart
  55. GRB 060602B: Swift detection of a burst
  56. GRB 060602: Swift detection of a burst
  57. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  58. GRB 060522: Swift detection of a burst with possible optical afterglow
  59. GRB 060516: Swift detection of a burst
  60. GRB 060515: Swift detection of a burst
  61. Swift/UVOT observations of GRB060512.
  62. GRB 060512: Subaru NIR observation
  63. GRB 060512: Detection of NIR afterglow
  64. GRB 060512: P60 Observations
  65. GRB060512 Name Correction: LT Afterglow detection
  66. GRB060512: Liverpool Telescope Afterglow detection
  67. GRB 060512: Swift detection of a burst with an optical afterglow
  68. GRB 060510A: Swift/UVOT Detection of an Optical Afterglow
  69. GRB 060428a, SMARTS optical/IR afterglow detection
  70. GRB 060510B: Swift/UVOT Upper Limits
  71. GRB060510B : Faulkes North Telescope detection
  72. GRB 060510B: Swift detection of a burst
  73. GRB 060510: Swift detection of a burst with optical transient
  74. GRB060507: optical afterglow detection
  75. GRB 060507: Swift detection of a burst
  76. GRB 060505: Swift-BAT detection of a weak burst
  77. GRB 060502A: Swift/UVOT source detection
  78. GRB 060502B: Swift detection of a short burst
  79. GRB 060502: Swift detection of a burst with an optical counterpart
  80. GRB060501: P60 imaging and afterglow candidate
  81. GRB060501: Swift XRT position
  82. GRB 060501: Swift detection of a burst
  83. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  84. GRB 060428B: KAIT observations
  85. GRB 051117A: Bright host galaxy not confirmed
  86. GRB060428A: Swift/UVOT observations.
  87. GRB 060428B: Swift detection of a burst
  88. GRB 060428: Swift detection of a burst
  89. GRB 060427: NOT observations
  90. GRB060418: Swift XRT Team Further Refined Analysis
  91. GRB 060427: Swift detection of a burst
  92. GRB060424: optical afterglow detection
  93. GRB060418: Further Analysis of MIKE Spectroscopy
  94. GRB 060424: Swift detection of a burst
  95. OT 060420: Likely Not a New Cosmic Transient
  96. Swift-BAT detection of Mrk 421
  97. OT 060420: CONCAM detection of a candidate new magnitude 5 optical
  98. Konus-Wind observation of GRB 060418
  99. GRB(?) 060421: Swift detection of a burst
  100. GRB 060418: Radio Observations

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