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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"

28124 results found.

  1. GRB 060512: REM NIR observations
  2. GRB060512 - SDSS Pre-Burst Observations
  3. GRB 060512: Swift detection of a burst with an optical afterglow
  4. GRB 060505: X-ray afterglow - Correction -
  5. GRB 060505: X-ray afterglow
  6. Konus-Wind observation of GRB 060510A
  7. GRB060418: optical observations
  8. GRB 060428a, SMARTS optical/IR afterglow detection
  9. GRB060510B: Swift XRT refined analysis
  10. GRB 060510A: Refined analysis of the Swift-BAT burst
  11. GRB 060510B: Swift-BAT Refined Analysis
  12. GRB060510A: XRT refined analysis
  13. GRB060510 - SDSS Pre-Burst Observations
  14. GRB 060510B: Swift detection of a burst
  15. GRB 060510: Swift detection of a burst with optical transient
  16. GRB060507: optical afterglow detection
  17. GRB060502B: improvement in the XRT afterglow position
  18. GRB 060507: Final Refined analysis of the Swift-BAT burst
  19. GRB 060507: Swift-BAT Refined Analysis
  20. GRB 060505: PROMPT Observations
  21. GRB 060507: Swift XRT Team Refined Analysis
  22. GRB 060507: Swift detection of a burst
  23. GRB 060429: Suzaku WAM observation
  24. GRB060505: Swift/UVOT Observations
  25. GRB060425: new MASTER survey method
  26. GRB 060306: Further Analysis of SOAR and APO NIR Observations
  27. GRB 060505: Swift XRT afterglow canditate position
  28. GRB 060502b: Second epoch Gemini observations
  29. GRB 060505: Swift-BAT detection of a weak burst
  30. GRB 060428B: spectroscopy
  31. GRB 060502B: optical observations
  32. GRB 060502B: AROMA refined photometric calibration
  33. GRB 060502B MDM Follow-up Observation
  34. GRB 060502b: Gemini imaging and spectroscopy
  35. GRB060502A, optical observation
  36. GRB 060502B: Swift/UVOT upper limits
  37. GRB 060502A: Swift/UVOT source detection
  38. GRB 060502B: MDM Optical Observation
  39. GRB 060502B: Refined analysis of the Swift-BAT short burst
  40. GRB060502B: Swift XRT Team refined analysis
  41. GRB 060501: P60 Observations and Candidate Retraction
  42. GRB 060502B: Xinglong optical observation
  43. GRB060502: Swift-XRT refined analysis
  44. GRB 060502: Swift-BAT refined analysis
  45. GRB060501: Swift UVOT followup observations
  46. GRB 060502: P60 Afterglow Confirmation
  47. GRB 060502: Swift detection of a burst with an optical counterpart
  48. GRB060501: P60 imaging and afterglow candidate
  49. GRB 060501: Refined analysis of the Swift-BAT burst
  50. GRB060428B - SDSS Pre-Burst Observations
  51. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  52. GRB 060428B: MDM Observations
  53. GRB060428B: Swift XRT Team refined analysis
  54. GRB 060427B: IPN localization of a short hard burst
  55. GRB 060428B: Refined analysis of the Swift-BAT burst
  56. GRB 060428B: Xinglong I-band limit
  57. GRB 051117A: Bright host galaxy not confirmed
  58. GRB060428A: Swift/UVOT observations.
  59. GRB060428B, optical observation
  60. GRB 060428A: Refined analysis of the Swift-BAT burst
  61. GRB 060428b : Kiso R-band limit
  62. GRB 060428b: Optical afterglow candidate
  63. GRB060428A: Swift XRT Team refined analysis
  64. GRB 060428B: Swift detection of a burst
  65. GRB 060427: NIR observations
  66. GRB060427: Xinglong optical Observations
  67. GRB 060428: Swift detection of a burst
  68. GRB 060427: Swift/UVOT upper limits.
  69. GRB 060427: Refined analysis of the Swift-BAT burst
  70. GRB060427: Swift XRT Team refined analysis
  71. GRB060418: Swift XRT Team Further Refined Analysis
  72. GRB060425:MASTER survey observations
  73. GRB 060427, optical observation
  74. GRB 060427: Swift detection of a burst
  75. GRB060418: Further Analysis of MIKE Spectroscopy
  76. GRB 060424: Refined analysis of the Swift-BAT burst
  77. GRB 060421: TTT Observations
  78. GRB060421: Swift/UVOT observations
  79. GRB 060421: Swift-BAT Refined Analysis
  80. GRB 060421: Swift-XRT refined analysis
  81. GRB 060418: prediction of t_break
  82. GRB(?) 060421: Swift detection of a burst
  83. Erratum of GCN 4983 for GRB 060418 IR follow-up
  84. GRB 060418 : IR afterglow observations
  85. GRB 060418: Radio Observations
  86. GRB060418, BVRcIc field calibration
  87. GRB060418: Swift/UVOT Observations
  88. GRB060418: Optical Observations
  89. GRB 060418: Refined Analysis of the Swift-BAT burst
  90. GRB 060418, SMARTS continuing afterglow observations
  91. GRB 060418, SMARTS optical/IR afterglow observations
  92. GRB060418 : LT optical afterglow observation
  93. GRB 060418: REM candidate afterglow
  94. GRB 060418: Swift detection of a burst with bright x-ray and optical afterglow
  95. GRB060413: Swift/UVOT upper limits
  96. GRB 060413: REM NIR Observations
  97. GRB 060413: Refined analysis of the Swift-BAT burst
  98. GRB 060403: MITSuME optical observation
  99. GRB060403: Optical Limit
  100. GRB060403: XRT refined analysis

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