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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').

18284 results found.

  1. GRB060729: ROTSE-III Observations of the Slow Optical Decay
  2. Swift-BAT trigger 221873 is not a GRB or a Transient
  3. GRB 060729: Swift/UVOT Detections
  4. GRB 060729: Refined analysis of the Swift-BAT burst
  5. GRB 060729: Swift-XRT refined analysis
  6. GRB 060729: Swift/UVOT Observations
  7. GRB 060729: ROTSE-III Detection of Optical Counterpart
  8. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  9. GRB 060728: Swift/UVOT Upper Limits
  10. GRB 060728: Refined analysis of the Swift-BAT burst
  11. Swift/XRT preliminary analysis
  12. GRB 060728: Swift detection of a burst
  13. GRB060614 ATCA Radio Limits
  14. GRB 060714: Swift/UVOT Observations
  15. GRB 060522: VLA observation
  16. GRB 060719: Swift/UVOT Upper Limits
  17. GRB 060719: Refined analysis of the Swift-BAT burst
  18. GRB 060719: XRT refined analysis
  19. GRB 060719: optical limit by Pi-of-the-Sky
  20. GRB060719: FRAM early follow-up limit
  21. GRB 060719: Swift detection of a burst
  22. GRB 060717: Swift XRT refined analysis
  23. GRB 060714: Refined analysis of the Swift-BAT burst
  24. GRB060717: Swift/UVOT upper limits
  25. GRB 060717: Swift XRT refined position
  26. GRB 060717: Swift-BAT refined analysis
  27. GRB 060717: Swift detection of a burst
  28. GRB 060714: Swift XRT refined analysis
  29. GRB060708: MARGE low resolution spectrum observations
  30. Swift-BAT trigger 219136 is not a GRB
  31. GRB060707 possible optical confirmation
  32. Swift trigger 219136 is probably not a GRB
  33. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  34. GRB 060712: XRT refined analysis
  35. GRB 060712: Swift/UVOT Upper Limits
  36. GRB 060712: XRT refined position
  37. GRB 060712: Refined analysis of the Swift-BAT burst
  38. GRB 060712: Swift detection of a burst
  39. GRB 060708: Swift-XRT refined analysis
  40. GCN 060708: Swift-UVOT Observations
  41. GRB 060708: Refined analysis of the Swift-BAT burst
  42. GCN 060707: Swift-UVOT observations
  43. GRB 060707: Swift-XRT refined analysis
  44. GRB 060708: Swift detection of a burst with an UVOT countpart
  45. GRB060707 possible optical confirmation
  46. GRB 060707: BOOTES-IR optical afterglow candidate
  47. GRB 060707: Refined analysis of the Swift-BAT burst
  48. GRB 060707: BOOTES-IR optical observation
  49. GRB060614: Possible SN Bump in UVOT U Band Light Curve
  50. GRB 060707: Swift detection of a burst
  51. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  52. Swift-BAT trigger 215279 is not a GRB
  53. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  54. GRB 060614: pseudo-z from spectral parameters of the prompt emission
  55. Konus-Wind observation of GRB 060614
  56. The Unusually Long-Lived Afterglow of GRB 060614
  57. GRB 060605, optical observations
  58. GRB060614: SSO 1m observations
  59. GRB060614: Watcher observation
  60. GRB 060614: Swift-BAT refined analysis
  61. GRB 060614: Swift/UVOT Observations
  62. GRB060614: Swift-XRT refined analysis
  63. GRB 060604, optical observations
  64. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  65. GRB 060602A: Swift/XRT analysis
  66. BAT Trigger #214277 is SGR 1900+14
  67. GRB 060610: KAIT observations
  68. GRB 060607: RTT150 optical observations
  69. GRB 070706B: Watcher upper limit
  70. GRB 060607B: Swift-BAT Refined Analysis
  71. GRB060602A: Swift/UVOT upper limits
  72. GRB 060607B: Swift detection of a burst
  73. GCN 060607: Swift-UVOT obswervations.
  74. GRB 060607: Swift-BAT Refined Analysis
  75. GRB 060607: optical limit by "Pi of the Sky"
  76. GRB 060607: Swift-XRT Team refined analysis
  77. VLT/UVES observations of GRB 060607
  78. GRB 060605: RTT150 optical observations
  79. GRB 060607: Swift detection of a burst with bright optical counterpart
  80. GRB 060605 BAT refined analysis
  81. GRB060605: Swift/UVOT detections
  82. GRB 060605: Swift-XRT Team refined analysis
  83. GRB 060605: RTT150 optical observations
  84. GRB 060605: ROTSE-III Optical Counterpart
  85. GRB 060605: Swift detection of a burst with optical counterpart
  86. GRB 060605: ROTSE-III Detection of Optical Counterpart
  87. GRB060604: Swift/UVOT detections
  88. GRB 060604: redshift
  89. GRB 060604 optical photometry
  90. GRB 060604: Swift-XRT Team refined analysis
  91. GRB 060604: BAT refined analysis
  92. GRB 060604A: ROTSE-III Optical Limits
  93. GRB 060604: Swift detection of a burst with possible optical counterpart
  94. GRB 060602A: Swift-BAT Refined Analysis: Correction
  95. GRB 060602B: XMM-Newton Survey Source
  96. GRB 060602B: Swift-XRT Refined Analysis
  97. GRB 060602B: Swift-BAT Refined Analysis
  98. GRB 060602B: Swift/UVOT observations
  99. GRB 060602A: Swift-BAT Refined Analysis
  100. GRB 060602B: RTT150 optical observations

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