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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"

28117 results found.

  1. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  2. GRB050326: Host Galaxy Candidates
  3. GRB050124: Possible Host Galaxy
  4. GRB050223: Host Galaxy
  5. Konus-Wind observation of GRB 060614
  6. GRB060605: optical observation
  7. GRB 060614: optical observations
  8. GRB 060605, optical observations
  9. GRB 060614: Swift-BAT refined analysis
  10. GRB 060614: Swift/UVOT Observations
  11. GRB060614: Swift-XRT refined analysis
  12. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  13. GRB 060602A: Swift/XRT analysis
  14. BAT Trigger #214277 is SGR 1900+14
  15. GRB 060610: KAIT observations
  16. GRB 060607: RTT150 optical observations
  17. GRB 060607B: Swift-BAT Refined Analysis
  18. GRB060602A: Swift/UVOT upper limits
  19. GRB 060607B: Swift detection of a burst
  20. GCN 060607: Swift-UVOT obswervations.
  21. GRB 060607: Swift-BAT Refined Analysis
  22. GRB 060607: Swift-XRT Team refined analysis
  23. GRB 060607: IR observations
  24. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  25. GRB 060605: RTT150 optical observations
  26. GRB 060607: REM NIR afterglow
  27. GRB 060607: Swift detection of a burst with bright optical counterpart
  28. GRB 060522: PROMPT Optical Limits
  29. GRB 060605 BAT refined analysis
  30. GRB 060605: Xinglong TNT optical observations
  31. GRB060602B : REM infrared observations
  32. GRB060605: Swift/UVOT detections
  33. GRB 060605: Swift-XRT Team refined analysis
  34. GRB 060605: RTT150 optical observations
  35. GRB 060605: Swift detection of a burst with optical counterpart
  36. GRB060604: Swift/UVOT detections
  37. GRB 060604: Swift-XRT Team refined analysis
  38. GRB 060604: BAT refined analysis
  39. GRB 060604A: ROTSE-III Optical Limits
  40. GRB 060604: Swift detection of a burst with possible optical counterpart
  41. GRB 060602A: Swift-BAT Refined Analysis: Correction
  42. GRB 060602B: Swift-XRT Refined Analysis
  43. GRB 060602B: Swift-BAT Refined Analysis
  44. GRB 060602B: Swift/UVOT observations
  45. GRB 060602A: Swift-BAT Refined Analysis
  46. GRB 060211A : WIDGET simultaneous optical observations
  47. GRB060602A: optical observations(/transient?)
  48. GRB 060602B: Swift detection of a burst
  49. GRB060602B: BOOTES-IR candidate afterglow
  50. GRB060602 - SDSS Pre-Burst Observations
  51. GRB 060502A: Optical afterglow observations
  52. GRB 060526: Break in X-ray light curve
  53. GRB060526, optical observations
  54. GRB 051227 : WIDGET simultaneous optical observations
  55. GRB 051028 : WIDGET pre-trigger limit
  56. GRB060526: Optical counterpart from MIRO
  57. GRB 060526: RTT150 optical observations
  58. GRB060526: optical observations
  59. GRB 060526: REM observations
  60. GRB 060526: RTT150 optical observations, afterglow flattening
  61. GRB 060526: MDM-2.4m Observations
  62. GRB 060526: Refined analysis of the Swift-BAT burst
  63. GRB 060526: RTT150 optical observations
  64. GRB060526, optical observations
  65. GRB 060526: Swift/XRT Team refined analysis
  66. GRB 060526: ROTSE-III Observations of Optical Counterpart
  67. GRB 060526: Watcher Observations
  68. GRB060526 - SDSS Pre-burst Observations
  69. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  70. GRB 060413 : WIDGET simultaneous optical observations
  71. XMM-Newton observation of GRB060510b
  72. GRB060512: Late-Time P200 Observations
  73. GRB 060522: Swift-BAT Refined Analysis
  74. GRB 060522: REM NIR observations
  75. GRB 060522: TNG optical observations
  76. GRB 060515: NIR observation
  77. GRB 060210: Jet Break in the XRT light curve
  78. GRB 060516: Refined analysis of the Swift-BAT burst
  79. GRB060515: P200 NIR Observations
  80. GRB 060505 BAT refined analysis
  81. GRB 060515 BAT refined analysis
  82. GRB 060512: TAROT optical observation
  83. GRB 060515: Swift/XRT Team refined analysis
  84. GRB 060515: Swift/UVOT Upper Limits
  85. GRB 060515: Swift/XRT position
  86. GRB 060515: Super-LOTIS Observations
  87. GRB 060515: TAROT optical observation
  88. GRB 060512: Subaru NIR observation
  89. GRB060512: Swift XRT Team refined analysis
  90. GRB 060512: 1.54m Kuiper Observations
  91. GRB 060512: Detection of NIR afterglow
  92. GRB 060512: P60 Observations
  93. GRB 060512: Swift-BAT Refined Analysis
  94. GRB 060512: REM NIR observations
  95. GRB060512 - SDSS Pre-Burst Observations
  96. GRB 060512: Swift detection of a burst with an optical afterglow
  97. GRB 060505: X-ray afterglow - Correction -
  98. GRB 060505: X-ray afterglow
  99. Konus-Wind observation of GRB 060510A
  100. GRB060418: optical observations

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