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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"

28120 results found.

  1. GRB 060505: X-ray afterglow
  2. Konus-Wind observation of GRB 060510A
  3. GRB060418: optical observations
  4. GRB 060428a, SMARTS optical/IR afterglow detection
  5. GRB060510B: Swift XRT refined analysis
  6. GRB 060510A: Refined analysis of the Swift-BAT burst
  7. GRB 060510B: Swift-BAT Refined Analysis
  8. GRB060510A: XRT refined analysis
  9. GRB060510 - SDSS Pre-Burst Observations
  10. GRB 060510B: Swift detection of a burst
  11. GRB 060510: Swift detection of a burst with optical transient
  12. GRB060507: optical afterglow detection
  13. GRB060502B: improvement in the XRT afterglow position
  14. GRB 060507: Final Refined analysis of the Swift-BAT burst
  15. GRB 060507: Swift-BAT Refined Analysis
  16. GRB 060505: PROMPT Observations
  17. GRB 060507: Swift XRT Team Refined Analysis
  18. GRB 060507: Swift detection of a burst
  19. GRB 060429: Suzaku WAM observation
  20. GRB060505: Swift/UVOT Observations
  21. GRB060425: new MASTER survey method
  22. GRB 060306: Further Analysis of SOAR and APO NIR Observations
  23. GRB 060505: Swift XRT afterglow canditate position
  24. GRB 060502b: Second epoch Gemini observations
  25. GRB 060505: Swift-BAT detection of a weak burst
  26. GRB 060428B: spectroscopy
  27. GRB 060502B: optical observations
  28. GRB 060502B: AROMA refined photometric calibration
  29. GRB 060502B MDM Follow-up Observation
  30. GRB 060502b: Gemini imaging and spectroscopy
  31. GRB060502A, optical observation
  32. GRB 060502B: Swift/UVOT upper limits
  33. GRB 060502A: Swift/UVOT source detection
  34. GRB 060502B: MDM Optical Observation
  35. GRB 060502B: Refined analysis of the Swift-BAT short burst
  36. GRB060502B: Swift XRT Team refined analysis
  37. GRB 060501: P60 Observations and Candidate Retraction
  38. GRB 060502B: Xinglong optical observation
  39. GRB060502: Swift-XRT refined analysis
  40. GRB 060502: Swift-BAT refined analysis
  41. GRB060501: Swift UVOT followup observations
  42. GRB 060502: P60 Afterglow Confirmation
  43. GRB 060502: Swift detection of a burst with an optical counterpart
  44. GRB060501: P60 imaging and afterglow candidate
  45. GRB 060501: Refined analysis of the Swift-BAT burst
  46. GRB060428B - SDSS Pre-Burst Observations
  47. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  48. GRB 060428B: MDM Observations
  49. GRB060428B: Swift XRT Team refined analysis
  50. GRB 060427B: IPN localization of a short hard burst
  51. GRB 060428B: Refined analysis of the Swift-BAT burst
  52. GRB 060428B: Xinglong I-band limit
  53. GRB 051117A: Bright host galaxy not confirmed
  54. GRB060428A: Swift/UVOT observations.
  55. GRB060428B, optical observation
  56. GRB 060428A: Refined analysis of the Swift-BAT burst
  57. GRB 060428b : Kiso R-band limit
  58. GRB 060428b: Optical afterglow candidate
  59. GRB060428A: Swift XRT Team refined analysis
  60. GRB 060428B: Swift detection of a burst
  61. GRB 060427: NIR observations
  62. GRB060427: Xinglong optical Observations
  63. GRB 060428: Swift detection of a burst
  64. GRB 060427: Swift/UVOT upper limits.
  65. GRB 060427: Refined analysis of the Swift-BAT burst
  66. GRB060427: Swift XRT Team refined analysis
  67. GRB060418: Swift XRT Team Further Refined Analysis
  68. GRB060425:MASTER survey observations
  69. GRB 060427, optical observation
  70. GRB 060427: Swift detection of a burst
  71. GRB060418: Further Analysis of MIKE Spectroscopy
  72. GRB 060424: Refined analysis of the Swift-BAT burst
  73. GRB 060421: TTT Observations
  74. GRB060421: Swift/UVOT observations
  75. GRB 060421: Swift-BAT Refined Analysis
  76. GRB 060421: Swift-XRT refined analysis
  77. GRB 060418: prediction of t_break
  78. GRB(?) 060421: Swift detection of a burst
  79. Erratum of GCN 4983 for GRB 060418 IR follow-up
  80. GRB 060418 : IR afterglow observations
  81. GRB 060418: Radio Observations
  82. GRB060418, BVRcIc field calibration
  83. GRB060418: Swift/UVOT Observations
  84. GRB060418: Optical Observations
  85. GRB 060418: Refined Analysis of the Swift-BAT burst
  86. GRB 060418, SMARTS continuing afterglow observations
  87. GRB 060418, SMARTS optical/IR afterglow observations
  88. GRB060418 : LT optical afterglow observation
  89. GRB 060418: REM candidate afterglow
  90. GRB 060418: Swift detection of a burst with bright x-ray and optical afterglow
  91. GRB060413: Swift/UVOT upper limits
  92. GRB 060413: REM NIR Observations
  93. GRB 060413: Refined analysis of the Swift-BAT burst
  94. GRB 060403: MITSuME optical observation
  95. GRB060403: Optical Limit
  96. GRB060403: XRT refined analysis
  97. GRB 060403: Swift/UVOT upper limits
  98. SGR 1900+14: BAT observations
  99. GRB 060403: Refined analysis of the Swift-BAT burst
  100. Konus-Wind observation of the recent SGR 1900+14 activity. Will

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