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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"

23613 results found.

  1. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  2. GRB 060801: Swift detection of a short burst
  3. IBAS Alert n. 3415: not a GRB
  4. GRB 060719: TORTOREM optical upper limits
  5. GRB 060729: Refined analysis of the Swift-BAT burst
  6. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  7. GRB 060728: Swift/UVOT Upper Limits
  8. GRB 060728: Refined analysis of the Swift-BAT burst
  9. GRB 060728, SMARTS optical/IR observations
  10. GRB 060728: Swift detection of a burst
  11. GRB 060522: VLA observation
  12. GRB 060719: Swift/UVOT Upper Limits
  13. GRB 060719: VLT/ISAAC observations
  14. GRB 060719: Refined analysis of the Swift-BAT burst
  15. GRB 060719: XRT refined analysis
  16. GRB 060719: prompt PROMPT observations
  17. GRB 060719: Swift detection of a burst
  18. GRB 060717: Swift XRT refined analysis
  19. GRB 060714: OA fading and a possible host detection
  20. GRB 060714: Refined analysis of the Swift-BAT burst
  21. GRB 060717 optical upper limit
  22. GRB 060717: Swift XRT refined position
  23. GRB 060717: Swift-BAT refined analysis
  24. GRB060717 - SDSS Pre-burst Observations
  25. GRB 060717: Swift detection of a burst
  26. GRB060714: optical observations
  27. GRB 060714 : Liverpool Telescope Observations
  28. GRB 060714: Swift XRT refined analysis
  29. GRB060714: optical observations
  30. GRB060707 possible optical confirmation
  31. Swift trigger 219136 is probably not a GRB
  32. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  33. GRB 060605: SkyNet Optical Limits
  34. GRB060526: optical observations
  35. GRB 060712: Refined analysis of the Swift-BAT burst
  36. GRB 060712: Swift detection of a burst
  37. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  38. GRB 060708: PROMPT Optical Limits
  39. GRB 060708: Refined analysis of the Swift-BAT burst
  40. GRB 060708: Swift detection of a burst with an UVOT countpart
  41. GRB060707 possible optical confirmation
  42. GRB 060707: BOOTES-IR optical afterglow candidate
  43. GRB 060707: Refined analysis of the Swift-BAT burst
  44. GRB 060707: Swift detection of a burst
  45. GRB 060105: Upper limit on Host Galaxy
  46. GRB 060614: redshift confirmation
  47. Swift-BAT trigger 215279 is not a GRB
  48. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  49. GRB 060614: spectroscopy
  50. Konus-Wind observation of GRB 060614
  51. The Unusually Long-Lived Afterglow of GRB 060614
  52. GRB 060605, optical observations
  53. GRB 060614: Swift-BAT refined analysis
  54. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  55. BAT Trigger #214277 is SGR 1900+14
  56. GRB 060610: KAIT observations
  57. GRB 060607: RTT150 optical observations
  58. GRB 060607B: Swift-BAT Refined Analysis
  59. GRB 060607B: Swift detection of a burst
  60. GRB 060607: Swift-BAT Refined Analysis
  61. GRB 060607: PROMPT Observations
  62. GRB 060605: RTT150 optical observations
  63. GRB 060607: Swift detection of a burst with bright optical counterpart
  64. GRB 060522: PROMPT Optical Limits
  65. GRB 060605 BAT refined analysis
  66. GRB060605: Swift/UVOT detections
  67. SALT spectroscopy of GRB 060605
  68. GRB 060605: TNG optical observations
  69. GRB 060605: RTT150 optical observations
  70. GRB 060605: ROTSE-III Optical Counterpart
  71. GRB 060605: Swift detection of a burst with optical counterpart
  72. GRB060604: Swift/UVOT detections
  73. GRB 060604: redshift
  74. GRB 060604: BAT refined analysis
  75. GRB 060604A: ROTSE-III Optical Limits
  76. GRB 060604: Swift detection of a burst with possible optical counterpart
  77. GRB 060602B: Swift-BAT Refined Analysis
  78. GRB 060602A: Swift-BAT Refined Analysis
  79. GRB 060602B: RTT150 optical observations
  80. GRB 060211A : WIDGET simultaneous optical observations
  81. GRB 060602B: Swift detection of a burst
  82. GRB060602 - SDSS Pre-Burst Observations
  83. GRB 060602: Swift detection of a burst
  84. GRB 060526: RTT150 optical observations
  85. GRB 051227 : WIDGET simultaneous optical observations
  86. GRB 051028 : WIDGET pre-trigger limit
  87. GRB 060526: RTT150 optical observations
  88. GRB 060526: RTT150 optical observations
  89. GRB060526: Optical counterpart from MIRO
  90. GRB060502b: optical observations
  91. GRB 060526: RTT150 optical observations
  92. GRB 060526: RTT150 optical observations, afterglow flattening
  93. GRB 060526: Refined analysis of the Swift-BAT burst
  94. GRB 060526: RTT150 optical observations
  95. GRB060526, optical observations
  96. GRB 060526: Magellan Redshift
  97. GRB 060526: TNG optical observations
  98. GRB060526 - SDSS Pre-burst Observations
  99. GRB 060526: Continued emission for the Swift burst
  100. GRB 060526: Swift detection of a burst with x-ray and optical afterglow

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