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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"

28248 results found.

  1. GRB 060413 : WIDGET simultaneous optical observations
  2. XMM-Newton observation of GRB060510b
  3. GRB060512: Late-Time P200 Observations
  4. GRB 060522: Swift-BAT Refined Analysis
  5. GRB 060522: REM NIR observations
  6. GRB 060522: TNG optical observations
  7. GRB 060515: NIR observation
  8. GRB 060210: Jet Break in the XRT light curve
  9. GRB 060516: Refined analysis of the Swift-BAT burst
  10. GRB060515: P200 NIR Observations
  11. GRB 060505 BAT refined analysis
  12. GRB 060515 BAT refined analysis
  13. GRB 060512: TAROT optical observation
  14. GRB 060515: Swift/XRT Team refined analysis
  15. GRB 060515: Swift/UVOT Upper Limits
  16. GRB 060515: Swift/XRT position
  17. GRB 060515: Super-LOTIS Observations
  18. GRB 060515: TAROT optical observation
  19. GRB 060512: Subaru NIR observation
  20. GRB060512: Swift XRT Team refined analysis
  21. GRB 060512: 1.54m Kuiper Observations
  22. GRB 060512: Detection of NIR afterglow
  23. GRB 060512: P60 Observations
  24. GRB 060512: Swift-BAT Refined Analysis
  25. GRB 060512: REM NIR observations
  26. GRB060512 - SDSS Pre-Burst Observations
  27. GRB 060512: Swift detection of a burst with an optical afterglow
  28. GRB 060505: X-ray afterglow - Correction -
  29. GRB 060505: X-ray afterglow
  30. Konus-Wind observation of GRB 060510A
  31. GRB060418: optical observations
  32. GRB 060428a, SMARTS optical/IR afterglow detection
  33. GRB060510B: Swift XRT refined analysis
  34. GRB 060510A: Refined analysis of the Swift-BAT burst
  35. GRB 060510B: Swift-BAT Refined Analysis
  36. GRB060510A: XRT refined analysis
  37. GRB060510 - SDSS Pre-Burst Observations
  38. GRB 060510B: Swift detection of a burst
  39. GRB 060510: Swift detection of a burst with optical transient
  40. GRB060507: optical afterglow detection
  41. GRB060502B: improvement in the XRT afterglow position
  42. GRB 060507: Final Refined analysis of the Swift-BAT burst
  43. GRB 060507: Swift-BAT Refined Analysis
  44. GRB 060505: PROMPT Observations
  45. GRB 060507: Swift XRT Team Refined Analysis
  46. GRB 060507: Swift detection of a burst
  47. GRB 060429: Suzaku WAM observation
  48. GRB060505: Swift/UVOT Observations
  49. GRB060425: new MASTER survey method
  50. GRB 060306: Further Analysis of SOAR and APO NIR Observations
  51. GRB 060505: Swift XRT afterglow canditate position
  52. GRB 060502b: Second epoch Gemini observations
  53. GRB 060505: Swift-BAT detection of a weak burst
  54. GRB 060428B: spectroscopy
  55. GRB 060502B: optical observations
  56. GRB 060502B: AROMA refined photometric calibration
  57. GRB 060502B MDM Follow-up Observation
  58. GRB 060502b: Gemini imaging and spectroscopy
  59. GRB060502A, optical observation
  60. GRB 060502B: Swift/UVOT upper limits
  61. GRB 060502A: Swift/UVOT source detection
  62. GRB 060502B: MDM Optical Observation
  63. GRB 060502B: Refined analysis of the Swift-BAT short burst
  64. GRB060502B: Swift XRT Team refined analysis
  65. GRB 060501: P60 Observations and Candidate Retraction
  66. GRB 060502B: Xinglong optical observation
  67. GRB060502: Swift-XRT refined analysis
  68. GRB 060502: Swift-BAT refined analysis
  69. GRB060501: Swift UVOT followup observations
  70. GRB 060502: P60 Afterglow Confirmation
  71. GRB 060502: Swift detection of a burst with an optical counterpart
  72. GRB060501: P60 imaging and afterglow candidate
  73. GRB 060501: Refined analysis of the Swift-BAT burst
  74. GRB060428B - SDSS Pre-Burst Observations
  75. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  76. GRB 060428B: MDM Observations
  77. GRB060428B: Swift XRT Team refined analysis
  78. GRB 060427B: IPN localization of a short hard burst
  79. GRB 060428B: Refined analysis of the Swift-BAT burst
  80. GRB 060428B: Xinglong I-band limit
  81. GRB 051117A: Bright host galaxy not confirmed
  82. GRB060428A: Swift/UVOT observations.
  83. GRB060428B, optical observation
  84. GRB 060428A: Refined analysis of the Swift-BAT burst
  85. GRB 060428b : Kiso R-band limit
  86. GRB 060428b: Optical afterglow candidate
  87. GRB060428A: Swift XRT Team refined analysis
  88. GRB 060428B: Swift detection of a burst
  89. GRB 060427: NIR observations
  90. GRB060427: Xinglong optical Observations
  91. GRB 060428: Swift detection of a burst
  92. GRB 060427: Swift/UVOT upper limits.
  93. GRB 060427: Refined analysis of the Swift-BAT burst
  94. GRB060427: Swift XRT Team refined analysis
  95. GRB060418: Swift XRT Team Further Refined Analysis
  96. GRB060425:MASTER survey observations
  97. GRB 060427, optical observation
  98. GRB 060427: Swift detection of a burst
  99. GRB060418: Further Analysis of MIKE Spectroscopy
  100. GRB 060424: Refined analysis of the Swift-BAT burst

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