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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"

19662 results found.

  1. GRB 060717: Swift XRT refined analysis
  2. GRB 060714: Refined analysis of the Swift-BAT burst
  3. GRB060717: Swift/UVOT upper limits
  4. GRB 060717: Swift XRT refined position
  5. GRB 060717: Swift-BAT refined analysis
  6. GRB 060717: Swift detection of a burst
  7. GRB 060714: Swift XRT refined analysis
  8. GRB060708: MARGE low resolution spectrum observations
  9. Swift-BAT trigger 219136 is not a GRB
  10. GRB060707 possible optical confirmation
  11. Swift trigger 219136 is probably not a GRB
  12. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  13. GRB 060712: XRT refined analysis
  14. GRB 060712: Swift/UVOT Upper Limits
  15. GRB 060712: XRT refined position
  16. GRB 060712: Refined analysis of the Swift-BAT burst
  17. GRB 060712: Swift detection of a burst
  18. GRB 060708: Swift-XRT refined analysis
  19. GCN 060708: Swift-UVOT Observations
  20. GRB 060708: Refined analysis of the Swift-BAT burst
  21. GCN 060707: Swift-UVOT observations
  22. GRB 060707: Swift-XRT refined analysis
  23. GRB 060708: Swift detection of a burst with an UVOT countpart
  24. GRB060707 possible optical confirmation
  25. GRB 060707: BOOTES-IR optical afterglow candidate
  26. GRB 060707: Refined analysis of the Swift-BAT burst
  27. GRB 060707: BOOTES-IR optical observation
  28. GRB060614: Possible SN Bump in UVOT U Band Light Curve
  29. GRB 060707: Swift detection of a burst
  30. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  31. Swift-BAT trigger 215279 is not a GRB
  32. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  33. GRB 060614: pseudo-z from spectral parameters of the prompt emission
  34. Konus-Wind observation of GRB 060614
  35. The Unusually Long-Lived Afterglow of GRB 060614
  36. GRB 060605, optical observations
  37. GRB060614: SSO 1m observations
  38. GRB060614: Watcher observation
  39. GRB 060614: Swift-BAT refined analysis
  40. GRB 060614: Swift/UVOT Observations
  41. GRB060614: Swift-XRT refined analysis
  42. GRB 060604, optical observations
  43. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  44. GRB 060602A: Swift/XRT analysis
  45. BAT Trigger #214277 is SGR 1900+14
  46. GRB 060610: KAIT observations
  47. GRB 060607: RTT150 optical observations
  48. GRB 070706B: Watcher upper limit
  49. GRB 060607B: Swift-BAT Refined Analysis
  50. GRB060602A: Swift/UVOT upper limits
  51. GRB 060607B: Swift detection of a burst
  52. GCN 060607: Swift-UVOT obswervations.
  53. GRB 060607: Swift-BAT Refined Analysis
  54. GRB 060607: optical limit by "Pi of the Sky"
  55. GRB 060607: Swift-XRT Team refined analysis
  56. VLT/UVES observations of GRB 060607
  57. GRB 060605: RTT150 optical observations
  58. GRB 060607: Swift detection of a burst with bright optical counterpart
  59. GRB 060605 BAT refined analysis
  60. GRB060605: Swift/UVOT detections
  61. GRB 060605: Swift-XRT Team refined analysis
  62. GRB 060605: RTT150 optical observations
  63. GRB 060605: ROTSE-III Optical Counterpart
  64. GRB 060605: Swift detection of a burst with optical counterpart
  65. GRB 060605: ROTSE-III Detection of Optical Counterpart
  66. GRB060604: Swift/UVOT detections
  67. GRB 060604: redshift
  68. GRB 060604 optical photometry
  69. GRB 060604: Swift-XRT Team refined analysis
  70. GRB 060604: BAT refined analysis
  71. GRB 060604A: ROTSE-III Optical Limits
  72. GRB 060604: Swift detection of a burst with possible optical counterpart
  73. GRB 060602A: Swift-BAT Refined Analysis: Correction
  74. GRB 060602B: XMM-Newton Survey Source
  75. GRB 060602B: Swift-XRT Refined Analysis
  76. GRB 060602B: Swift-BAT Refined Analysis
  77. GRB 060602B: Swift/UVOT observations
  78. GRB 060602A: Swift-BAT Refined Analysis
  79. GRB 060602B: RTT150 optical observations
  80. GRB 060602B: Swift detection of a burst
  81. GRB060602 - SDSS Pre-Burst Observations
  82. GRB 060602: Swift detection of a burst
  83. GRB 060526: Break in X-ray light curve
  84. GRB 051227 : WIDGET simultaneous optical observations
  85. GRB 060526: Multiple Optical Flares
  86. GRB060502b: optical observations
  87. GRB 060526: Optical Flare
  88. GRB 060526: Refined analysis of the Swift-BAT burst
  89. GRB 060526: RTT150 optical observations
  90. GRB060526: Further Swift-UVOT Observations
  91. GRB 060526: Swift/XRT Team refined analysis
  92. GRB 060526: ROTSE-III Observations of Optical Counterpart
  93. GRB 060526: Watcher Observations
  94. GRB 060526: Continued emission for the Swift burst
  95. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  96. GRB 060413 : WIDGET simultaneous optical observations
  97. GRB 060522: Swift/UVOT Observations: Correction
  98. GRB 060522: Swift/UVOT Observations of the Optical Afterglow
  99. XMM-Newton observation of GRB060510b
  100. GRB 060522: Swift/XRT Team refined analysis

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