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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"

28238 results found.

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

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