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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"

28240 results found.

  1. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  2. GRB060712: P60 Observations
  3. GRB 060712: XRT refined analysis
  4. GRB 060712: Swift/UVOT Upper Limits
  5. GRB060526: optical observations
  6. GRB 060712: XRT refined position
  7. GRB 060712: Refined analysis of the Swift-BAT burst
  8. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  9. GRB 060707: OA fading and redshift
  10. GRB 060708: Swift-XRT refined analysis
  11. GCN 060708: Swift-UVOT Observations
  12. GRB 060708: Refined analysis of the Swift-BAT burst
  13. GCN 060707: Swift-UVOT observations
  14. GRB 060707: Swift-XRT refined analysis
  15. GRB 060708: Swift detection of a burst with an UVOT countpart
  16. GRB 060707: Refined analysis of the Swift-BAT burst
  17. GRB 060707: BOOTES-IR optical observation
  18. GRB 060515: Upper Limit on Host Galaxy
  19. GRB 060614: SMARTS host galaxy observations
  20. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  21. GRB 060109: Upper Limit on Host Galaxy
  22. GRB 060105: Upper limit on Host Galaxy
  23. GRB 060614: Redshift
  24. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  25. GRB050326: Host Galaxy Candidates
  26. GRB050124: Possible Host Galaxy
  27. GRB050223: Host Galaxy
  28. Konus-Wind observation of GRB 060614
  29. GRB060605: optical observation
  30. GRB 060614: optical observations
  31. GRB 060605, optical observations
  32. GRB 060614: Swift-BAT refined analysis
  33. GRB 060614: Swift/UVOT Observations
  34. GRB060614: Swift-XRT refined analysis
  35. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  36. GRB 060602A: Swift/XRT analysis
  37. BAT Trigger #214277 is SGR 1900+14
  38. GRB 060610: KAIT observations
  39. GRB 060607: RTT150 optical observations
  40. GRB 060607B: Swift-BAT Refined Analysis
  41. GRB060602A: Swift/UVOT upper limits
  42. GRB 060607B: Swift detection of a burst
  43. GCN 060607: Swift-UVOT obswervations.
  44. GRB 060607: Swift-BAT Refined Analysis
  45. GRB 060607: Swift-XRT Team refined analysis
  46. GRB 060607: IR observations
  47. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  48. GRB 060605: RTT150 optical observations
  49. GRB 060607: REM NIR afterglow
  50. GRB 060607: Swift detection of a burst with bright optical counterpart
  51. GRB 060522: PROMPT Optical Limits
  52. GRB 060605 BAT refined analysis
  53. GRB 060605: Xinglong TNT optical observations
  54. GRB060602B : REM infrared observations
  55. GRB060605: Swift/UVOT detections
  56. GRB 060605: Swift-XRT Team refined analysis
  57. GRB 060605: RTT150 optical observations
  58. GRB 060605: Swift detection of a burst with optical counterpart
  59. GRB060604: Swift/UVOT detections
  60. GRB 060604: Swift-XRT Team refined analysis
  61. GRB 060604: BAT refined analysis
  62. GRB 060604A: ROTSE-III Optical Limits
  63. GRB 060604: Swift detection of a burst with possible optical counterpart
  64. GRB 060602A: Swift-BAT Refined Analysis: Correction
  65. GRB 060602B: Swift-XRT Refined Analysis
  66. GRB 060602B: Swift-BAT Refined Analysis
  67. GRB 060602B: Swift/UVOT observations
  68. GRB 060602A: Swift-BAT Refined Analysis
  69. GRB 060211A : WIDGET simultaneous optical observations
  70. GRB060602A: optical observations(/transient?)
  71. GRB 060602B: Swift detection of a burst
  72. GRB060602B: BOOTES-IR candidate afterglow
  73. GRB060602 - SDSS Pre-Burst Observations
  74. GRB 060502A: Optical afterglow observations
  75. GRB 060526: Break in X-ray light curve
  76. GRB060526, optical observations
  77. GRB 051227 : WIDGET simultaneous optical observations
  78. GRB 051028 : WIDGET pre-trigger limit
  79. GRB060526: Optical counterpart from MIRO
  80. GRB 060526: RTT150 optical observations
  81. GRB060526: optical observations
  82. GRB 060526: REM observations
  83. GRB 060526: RTT150 optical observations, afterglow flattening
  84. GRB 060526: MDM-2.4m Observations
  85. GRB 060526: Refined analysis of the Swift-BAT burst
  86. GRB 060526: RTT150 optical observations
  87. GRB060526, optical observations
  88. GRB 060526: Swift/XRT Team refined analysis
  89. GRB 060526: ROTSE-III Observations of Optical Counterpart
  90. GRB 060526: Watcher Observations
  91. GRB060526 - SDSS Pre-burst Observations
  92. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  93. GRB 060413 : WIDGET simultaneous optical observations
  94. XMM-Newton observation of GRB060510b
  95. GRB060512: Late-Time P200 Observations
  96. GRB 060522: Swift-BAT Refined Analysis
  97. GRB 060522: REM NIR observations
  98. GRB 060522: TNG optical observations
  99. GRB 060515: NIR observation
  100. GRB 060210: Jet Break in the XRT light curve

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