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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"

28235 results found.

  1. GRB 060515: Swift/XRT Team refined analysis
  2. GRB 060515: Swift/UVOT Upper Limits
  3. GRB 060515: Swift/XRT position
  4. GRB 060515: Super-LOTIS Observations
  5. GRB 060515: TAROT optical observation
  6. GRB 060512: Subaru NIR observation
  7. GRB060512: Swift XRT Team refined analysis
  8. GRB 060512: 1.54m Kuiper Observations
  9. GRB 060512: Detection of NIR afterglow
  10. GRB 060512: P60 Observations
  11. GRB 060512: Swift-BAT Refined Analysis
  12. GRB 060512: REM NIR observations
  13. GRB060512 - SDSS Pre-Burst Observations
  14. GRB 060512: Swift detection of a burst with an optical afterglow
  15. GRB 060505: X-ray afterglow - Correction -
  16. GRB 060505: X-ray afterglow
  17. Konus-Wind observation of GRB 060510A
  18. GRB060418: optical observations
  19. GRB 060428a, SMARTS optical/IR afterglow detection
  20. GRB060510B: Swift XRT refined analysis
  21. GRB 060510A: Refined analysis of the Swift-BAT burst
  22. GRB 060510B: Swift-BAT Refined Analysis
  23. GRB060510A: XRT refined analysis
  24. GRB060510 - SDSS Pre-Burst Observations
  25. GRB 060510B: Swift detection of a burst
  26. GRB 060510: Swift detection of a burst with optical transient
  27. GRB060507: optical afterglow detection
  28. GRB060502B: improvement in the XRT afterglow position
  29. GRB 060507: Final Refined analysis of the Swift-BAT burst
  30. GRB 060507: Swift-BAT Refined Analysis
  31. GRB 060505: PROMPT Observations
  32. GRB 060507: Swift XRT Team Refined Analysis
  33. GRB 060507: Swift detection of a burst
  34. GRB 060429: Suzaku WAM observation
  35. GRB060505: Swift/UVOT Observations
  36. GRB060425: new MASTER survey method
  37. GRB 060306: Further Analysis of SOAR and APO NIR Observations
  38. GRB 060505: Swift XRT afterglow canditate position
  39. GRB 060502b: Second epoch Gemini observations
  40. GRB 060505: Swift-BAT detection of a weak burst
  41. GRB 060428B: spectroscopy
  42. GRB 060502B: optical observations
  43. GRB 060502B: AROMA refined photometric calibration
  44. GRB 060502B MDM Follow-up Observation
  45. GRB 060502b: Gemini imaging and spectroscopy
  46. GRB060502A, optical observation
  47. GRB 060502B: Swift/UVOT upper limits
  48. GRB 060502A: Swift/UVOT source detection
  49. GRB 060502B: MDM Optical Observation
  50. GRB 060502B: Refined analysis of the Swift-BAT short burst
  51. GRB060502B: Swift XRT Team refined analysis
  52. GRB 060501: P60 Observations and Candidate Retraction
  53. GRB 060502B: Xinglong optical observation
  54. GRB060502: Swift-XRT refined analysis
  55. GRB 060502: Swift-BAT refined analysis
  56. GRB060501: Swift UVOT followup observations
  57. GRB 060502: P60 Afterglow Confirmation
  58. GRB 060502: Swift detection of a burst with an optical counterpart
  59. GRB060501: P60 imaging and afterglow candidate
  60. GRB 060501: Refined analysis of the Swift-BAT burst
  61. GRB060428B - SDSS Pre-Burst Observations
  62. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  63. GRB 060428B: MDM Observations
  64. GRB060428B: Swift XRT Team refined analysis
  65. GRB 060427B: IPN localization of a short hard burst
  66. GRB 060428B: Refined analysis of the Swift-BAT burst
  67. GRB 060428B: Xinglong I-band limit
  68. GRB 051117A: Bright host galaxy not confirmed
  69. GRB060428A: Swift/UVOT observations.
  70. GRB060428B, optical observation
  71. GRB 060428A: Refined analysis of the Swift-BAT burst
  72. GRB 060428b : Kiso R-band limit
  73. GRB 060428b: Optical afterglow candidate
  74. GRB060428A: Swift XRT Team refined analysis
  75. GRB 060428B: Swift detection of a burst
  76. GRB 060427: NIR observations
  77. GRB060427: Xinglong optical Observations
  78. GRB 060428: Swift detection of a burst
  79. GRB 060427: Swift/UVOT upper limits.
  80. GRB 060427: Refined analysis of the Swift-BAT burst
  81. GRB060427: Swift XRT Team refined analysis
  82. GRB060418: Swift XRT Team Further Refined Analysis
  83. GRB060425:MASTER survey observations
  84. GRB 060427, optical observation
  85. GRB 060427: Swift detection of a burst
  86. GRB060418: Further Analysis of MIKE Spectroscopy
  87. GRB 060424: Refined analysis of the Swift-BAT burst
  88. GRB 060421: TTT Observations
  89. GRB060421: Swift/UVOT observations
  90. GRB 060421: Swift-BAT Refined Analysis
  91. GRB 060421: Swift-XRT refined analysis
  92. GRB 060418: prediction of t_break
  93. GRB(?) 060421: Swift detection of a burst
  94. Erratum of GCN 4983 for GRB 060418 IR follow-up
  95. GRB 060418 : IR afterglow observations
  96. GRB 060418: Radio Observations
  97. GRB060418, BVRcIc field calibration
  98. GRB060418: Swift/UVOT Observations
  99. GRB060418: Optical Observations
  100. GRB 060418: Refined Analysis of the Swift-BAT burst

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