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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"

28262 results found.

  1. GRB 061007: Correction to GCN 5712
  2. GRB 061007: Swift-BAT refined analysis
  3. GRB 061007: Swift XRT refined analysis
  4. GRB 061006: Swift/UVOT optical observations
  5. GRB 061007: Swift detection of a burst with an optical counterpart
  6. GRB 061007: ROTSE-III Detection of Optical Counterpart
  7. GRB 061006: VLT observation
  8. GRB 061006: Swift-BAT refined analysis of the short-hard burst
  9. GRB 061006: Swift-XRT Team Refined Analysis
  10. GRB061006 (Swift 232585) might be a short-hard GRB
  11. GRB 060930: near-IR afterglow candidate retraction
  12. GRB 061004: Optical afterglow candidate and redshift
  13. GRB 061004: Swift-XRT Team Refined Analysis
  14. GRB 061004, Swift BAT refined analysis
  15. GRB 061004: Swift detection of a burst
  16. GRB 060928: Suzaku/WAM observation of the prompt emission
  17. IGR J08408-4503 (= V* LM Vel): Swift detection of a transient
  18. GRB 060928: Swift observations
  19. IPN triangulation of GRB060928 (long, exceptionally bright)
  20. GRB 060930: near-IR afterglow candidate
  21. GRB 061002: Swift-XRT Team Refined Analysis
  22. VLA observations of GRB 060926
  23. GRB061002 - SDSS Pre-Burst Observations
  24. GRB 061002, Swift-BAT refined analysis
  25. GRB 060908: Detection of a possible host
  26. GRB 060807: Detection of a possible host galaxy
  27. GRB 060923A: VLA K-band Observations
  28. GRB 060930: Xinglong TNT optical observations
  29. GRB 060929: Further XRT Refined Analysis
  30. GRB 060929: Swift/UVOT Optical Observations
  31. GRB 060930: A long X-ray rich GRB detected by INTEGRAL
  32. GRB060929: Swift-XRT refined analysis.
  33. GRB 060929: TNG K-band observations
  34. GRB 060929, Swift-BAT refined analysis
  35. GRB060929: Optical limit
  36. Liverpool Telescope observations of GRB 060929
  37. GRB060908: optical observations
  38. GRB 060927: Swift/UVOT Optical Observations
  39. GRB 060927: Swift XRT Team refined analysis
  40. GRB 060927 optical limit
  41. GRB 060927, Swift-BAT refined analysis
  42. GRB 060927: Xinglong TNT optical observations
  43. GRB 060927, optical observation
  44. GRB060927 - SDSS Pre-Burst Observations
  45. Swift XRT boresight
  46. GRB060926: VLT redshift
  47. GRB 060926: Swift-UVOT Detections
  48. GRB 060923A: Schedule of Spitzer Space Telescope Observations
  49. GRB 060926, Swift-BAT refined analysis
  50. GRB 060923A: Radio Observations
  51. GRB 060926: RTT150, UVOT afterglow candidate confirmation
  52. GRB 060926: Swift detection of a burst
  53. GRB 060923C, Swift-BAT refined analysis
  54. GRB 060923C: VLA Observation
  55. GRB 060923C: NIR afterglow confirmed
  56. GRB060923C: AROMA optical obsevation
  57. GRB 060923C, optical observation
  58. GRB 060923A: Gemini Second Epoch and Afterglow Confirmation
  59. GRB 060923C: VLT J-band observations
  60. GRB 060923B: Swift XRT Refined Analysis
  61. GRB 060923A: Swift XRT refined analysis
  62. GRB 060923A: Keck and Gemini Observations
  63. GRB 060923C: Xinglong TNT optical observations
  64. GRB 060923B, Swift-BAT refined analysis
  65. GRB 060923C: Swift detection of a burst
  66. GRB 060923B: Swift detection of a burst
  67. GRB 060923, Swift-BAT refined analysis
  68. GRB 060923: UKIRT nIR observations - candidate afterglow
  69. GRB060923 - SDSS Pre-Burst Observations
  70. GRB 060923: Swift detection of a burst
  71. Swift detects a hard X-ray burst from AXP CXOU J164710.2-455216
  72. GRB 060919 : Faulkes South Telescope Observations
  73. GRB 060919, Swift-BAT refined analysis
  74. GRB060919: XRT refined analysis
  75. GRB 060919: TAROT optical observations
  76. GRB 060919: Swift detection of a burst
  77. GRB 060912A: VLA Observation
  78. GRB 060912A: Probable Host Galaxy
  79. GRB 060912, Swift-BAT refined analysis
  80. GRB 060912: Correction to GCN 5559
  81. GRB 060912: Swift detection of a burst with an optical afterglow
  82. VLA observations of GRB 060908
  83. GRB 060908, Swift-BAT refined analysis
  84. GRB 060908 - SDSS Pre-burst Observations
  85. GRB 060908: REM optical prompt observation
  86. GRB 060908: Swift detection of a burst with a bright optical counterpart
  87. GRB 060904A: Suzaku/WAM observation of the prompt emission
  88. GRB060906 , optical observation
  89. GRB 060906: Early RAPTOR optical limits
  90. GRB 060906, Swift-BAT refined spectral analysis
  91. GRB 060906: Swift/XRT Refined Analysis
  92. VLT redshift of GRB 060906
  93. GRB 060906, Swift-BAT refined analysis
  94. GRB 060906: Confirmation of P60 Optical Afterglow
  95. GRB 060906 (?): P60 Optical Afterglow Candidate
  96. GRB060904b, optical observations
  97. GRB060904A: Swift/UVOT optical observations
  98. GRB 060904A: Subaru NIR observation
  99. GRB 060904B: Swift-BAT refined analysis
  100. GRB 060904A: Refined analysis of the Swift-BAT burst

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