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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"

28127 results found.

  1. GRB 060707: Swift-XRT refined analysis
  2. GRB 060708: Swift detection of a burst with an UVOT countpart
  3. GRB 060707: Refined analysis of the Swift-BAT burst
  4. GRB 060707: BOOTES-IR optical observation
  5. GRB 060515: Upper Limit on Host Galaxy
  6. GRB 060614: SMARTS host galaxy observations
  7. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  8. GRB 060109: Upper Limit on Host Galaxy
  9. GRB 060105: Upper limit on Host Galaxy
  10. GRB 060614: Redshift
  11. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  12. GRB050326: Host Galaxy Candidates
  13. GRB050124: Possible Host Galaxy
  14. GRB050223: Host Galaxy
  15. Konus-Wind observation of GRB 060614
  16. GRB060605: optical observation
  17. GRB 060614: optical observations
  18. GRB 060605, optical observations
  19. GRB 060614: Swift-BAT refined analysis
  20. GRB 060614: Swift/UVOT Observations
  21. GRB060614: Swift-XRT refined analysis
  22. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  23. GRB 060602A: Swift/XRT analysis
  24. BAT Trigger #214277 is SGR 1900+14
  25. GRB 060610: KAIT observations
  26. GRB 060607: RTT150 optical observations
  27. GRB 060607B: Swift-BAT Refined Analysis
  28. GRB060602A: Swift/UVOT upper limits
  29. GRB 060607B: Swift detection of a burst
  30. GCN 060607: Swift-UVOT obswervations.
  31. GRB 060607: Swift-BAT Refined Analysis
  32. GRB 060607: Swift-XRT Team refined analysis
  33. GRB 060607: IR observations
  34. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  35. GRB 060605: RTT150 optical observations
  36. GRB 060607: REM NIR afterglow
  37. GRB 060607: Swift detection of a burst with bright optical counterpart
  38. GRB 060522: PROMPT Optical Limits
  39. GRB 060605 BAT refined analysis
  40. GRB 060605: Xinglong TNT optical observations
  41. GRB060602B : REM infrared observations
  42. GRB060605: Swift/UVOT detections
  43. GRB 060605: Swift-XRT Team refined analysis
  44. GRB 060605: RTT150 optical observations
  45. GRB 060605: Swift detection of a burst with optical counterpart
  46. GRB060604: Swift/UVOT detections
  47. GRB 060604: Swift-XRT Team refined analysis
  48. GRB 060604: BAT refined analysis
  49. GRB 060604A: ROTSE-III Optical Limits
  50. GRB 060604: Swift detection of a burst with possible optical counterpart
  51. GRB 060602A: Swift-BAT Refined Analysis: Correction
  52. GRB 060602B: Swift-XRT Refined Analysis
  53. GRB 060602B: Swift-BAT Refined Analysis
  54. GRB 060602B: Swift/UVOT observations
  55. GRB 060602A: Swift-BAT Refined Analysis
  56. GRB 060211A : WIDGET simultaneous optical observations
  57. GRB060602A: optical observations(/transient?)
  58. GRB 060602B: Swift detection of a burst
  59. GRB060602B: BOOTES-IR candidate afterglow
  60. GRB060602 - SDSS Pre-Burst Observations
  61. GRB 060502A: Optical afterglow observations
  62. GRB 060526: Break in X-ray light curve
  63. GRB060526, optical observations
  64. GRB 051227 : WIDGET simultaneous optical observations
  65. GRB 051028 : WIDGET pre-trigger limit
  66. GRB060526: Optical counterpart from MIRO
  67. GRB 060526: RTT150 optical observations
  68. GRB060526: optical observations
  69. GRB 060526: REM observations
  70. GRB 060526: RTT150 optical observations, afterglow flattening
  71. GRB 060526: MDM-2.4m Observations
  72. GRB 060526: Refined analysis of the Swift-BAT burst
  73. GRB 060526: RTT150 optical observations
  74. GRB060526, optical observations
  75. GRB 060526: Swift/XRT Team refined analysis
  76. GRB 060526: ROTSE-III Observations of Optical Counterpart
  77. GRB 060526: Watcher Observations
  78. GRB060526 - SDSS Pre-burst Observations
  79. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  80. GRB 060413 : WIDGET simultaneous optical observations
  81. XMM-Newton observation of GRB060510b
  82. GRB060512: Late-Time P200 Observations
  83. GRB 060522: Swift-BAT Refined Analysis
  84. GRB 060522: REM NIR observations
  85. GRB 060522: TNG optical observations
  86. GRB 060515: NIR observation
  87. GRB 060210: Jet Break in the XRT light curve
  88. GRB 060516: Refined analysis of the Swift-BAT burst
  89. GRB060515: P200 NIR Observations
  90. GRB 060505 BAT refined analysis
  91. GRB 060515 BAT refined analysis
  92. GRB 060512: TAROT optical observation
  93. GRB 060515: Swift/XRT Team refined analysis
  94. GRB 060515: Swift/UVOT Upper Limits
  95. GRB 060515: Swift/XRT position
  96. GRB 060515: Super-LOTIS Observations
  97. GRB 060515: TAROT optical observation
  98. GRB 060512: Subaru NIR observation
  99. GRB060512: Swift XRT Team refined analysis
  100. GRB 060512: 1.54m Kuiper Observations

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