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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"

28118 results found.

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

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