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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"

28116 results found.

  1. GRB060510B: Swift XRT refined analysis
  2. GRB 060510A: Refined analysis of the Swift-BAT burst
  3. GRB 060510B: Swift-BAT Refined Analysis
  4. GRB060510A: XRT refined analysis
  5. GRB060510 - SDSS Pre-Burst Observations
  6. GRB 060510B: Swift detection of a burst
  7. GRB 060510: Swift detection of a burst with optical transient
  8. GRB060507: optical afterglow detection
  9. GRB060502B: improvement in the XRT afterglow position
  10. GRB 060507: Final Refined analysis of the Swift-BAT burst
  11. GRB 060507: Swift-BAT Refined Analysis
  12. GRB 060505: PROMPT Observations
  13. GRB 060507: Swift XRT Team Refined Analysis
  14. GRB 060507: Swift detection of a burst
  15. GRB 060429: Suzaku WAM observation
  16. GRB060505: Swift/UVOT Observations
  17. GRB060425: new MASTER survey method
  18. GRB 060306: Further Analysis of SOAR and APO NIR Observations
  19. GRB 060505: Swift XRT afterglow canditate position
  20. GRB 060502b: Second epoch Gemini observations
  21. GRB 060505: Swift-BAT detection of a weak burst
  22. GRB 060428B: spectroscopy
  23. GRB 060502B: optical observations
  24. GRB 060502B: AROMA refined photometric calibration
  25. GRB 060502B MDM Follow-up Observation
  26. GRB 060502b: Gemini imaging and spectroscopy
  27. GRB060502A, optical observation
  28. GRB 060502B: Swift/UVOT upper limits
  29. GRB 060502A: Swift/UVOT source detection
  30. GRB 060502B: MDM Optical Observation
  31. GRB 060502B: Refined analysis of the Swift-BAT short burst
  32. GRB060502B: Swift XRT Team refined analysis
  33. GRB 060501: P60 Observations and Candidate Retraction
  34. GRB 060502B: Xinglong optical observation
  35. GRB060502: Swift-XRT refined analysis
  36. GRB 060502: Swift-BAT refined analysis
  37. GRB060501: Swift UVOT followup observations
  38. GRB 060502: P60 Afterglow Confirmation
  39. GRB 060502: Swift detection of a burst with an optical counterpart
  40. GRB060501: P60 imaging and afterglow candidate
  41. GRB 060501: Refined analysis of the Swift-BAT burst
  42. GRB060428B - SDSS Pre-Burst Observations
  43. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  44. GRB 060428B: MDM Observations
  45. GRB060428B: Swift XRT Team refined analysis
  46. GRB 060427B: IPN localization of a short hard burst
  47. GRB 060428B: Refined analysis of the Swift-BAT burst
  48. GRB 060428B: Xinglong I-band limit
  49. GRB 051117A: Bright host galaxy not confirmed
  50. GRB060428A: Swift/UVOT observations.
  51. GRB060428B, optical observation
  52. GRB 060428A: Refined analysis of the Swift-BAT burst
  53. GRB 060428b : Kiso R-band limit
  54. GRB 060428b: Optical afterglow candidate
  55. GRB060428A: Swift XRT Team refined analysis
  56. GRB 060428B: Swift detection of a burst
  57. GRB 060427: NIR observations
  58. GRB060427: Xinglong optical Observations
  59. GRB 060428: Swift detection of a burst
  60. GRB 060427: Swift/UVOT upper limits.
  61. GRB 060427: Refined analysis of the Swift-BAT burst
  62. GRB060427: Swift XRT Team refined analysis
  63. GRB060418: Swift XRT Team Further Refined Analysis
  64. GRB060425:MASTER survey observations
  65. GRB 060427, optical observation
  66. GRB 060427: Swift detection of a burst
  67. GRB060418: Further Analysis of MIKE Spectroscopy
  68. GRB 060424: Refined analysis of the Swift-BAT burst
  69. GRB 060421: TTT Observations
  70. GRB060421: Swift/UVOT observations
  71. GRB 060421: Swift-BAT Refined Analysis
  72. GRB 060421: Swift-XRT refined analysis
  73. GRB 060418: prediction of t_break
  74. GRB(?) 060421: Swift detection of a burst
  75. Erratum of GCN 4983 for GRB 060418 IR follow-up
  76. GRB 060418 : IR afterglow observations
  77. GRB 060418: Radio Observations
  78. GRB060418, BVRcIc field calibration
  79. GRB060418: Swift/UVOT Observations
  80. GRB060418: Optical Observations
  81. GRB 060418: Refined Analysis of the Swift-BAT burst
  82. GRB 060418, SMARTS continuing afterglow observations
  83. GRB 060418, SMARTS optical/IR afterglow observations
  84. GRB060418 : LT optical afterglow observation
  85. GRB 060418: REM candidate afterglow
  86. GRB 060418: Swift detection of a burst with bright x-ray and optical afterglow
  87. GRB060413: Swift/UVOT upper limits
  88. GRB 060413: REM NIR Observations
  89. GRB 060413: Refined analysis of the Swift-BAT burst
  90. GRB 060403: MITSuME optical observation
  91. GRB060403: Optical Limit
  92. GRB060403: XRT refined analysis
  93. GRB 060403: Swift/UVOT upper limits
  94. SGR 1900+14: BAT observations
  95. GRB 060403: Refined analysis of the Swift-BAT burst
  96. Konus-Wind observation of the recent SGR 1900+14 activity. Will
  97. GRB 060403: Swift detection of a burst
  98. HETE trigger H4044: RTT150 optical observations
  99. GRB060331: Swift/UVOT upper limits
  100. Swift XRT observations of the HETE transient H4043

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