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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"

28253 results found.

  1. GRB 060526: Swift/XRT Team refined analysis
  2. GRB 060526: ROTSE-III Observations of Optical Counterpart
  3. GRB 060526: Watcher Observations
  4. GRB060526 - SDSS Pre-burst Observations
  5. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  6. GRB 060413 : WIDGET simultaneous optical observations
  7. XMM-Newton observation of GRB060510b
  8. GRB060512: Late-Time P200 Observations
  9. GRB 060522: Swift-BAT Refined Analysis
  10. GRB 060522: REM NIR observations
  11. GRB 060522: TNG optical observations
  12. GRB 060515: NIR observation
  13. GRB 060210: Jet Break in the XRT light curve
  14. GRB 060516: Refined analysis of the Swift-BAT burst
  15. GRB060515: P200 NIR Observations
  16. GRB 060505 BAT refined analysis
  17. GRB 060515 BAT refined analysis
  18. GRB 060512: TAROT optical observation
  19. GRB 060515: Swift/XRT Team refined analysis
  20. GRB 060515: Swift/UVOT Upper Limits
  21. GRB 060515: Swift/XRT position
  22. GRB 060515: Super-LOTIS Observations
  23. GRB 060515: TAROT optical observation
  24. GRB 060512: Subaru NIR observation
  25. GRB060512: Swift XRT Team refined analysis
  26. GRB 060512: 1.54m Kuiper Observations
  27. GRB 060512: Detection of NIR afterglow
  28. GRB 060512: P60 Observations
  29. GRB 060512: Swift-BAT Refined Analysis
  30. GRB 060512: REM NIR observations
  31. GRB060512 - SDSS Pre-Burst Observations
  32. GRB 060512: Swift detection of a burst with an optical afterglow
  33. GRB 060505: X-ray afterglow - Correction -
  34. GRB 060505: X-ray afterglow
  35. Konus-Wind observation of GRB 060510A
  36. GRB060418: optical observations
  37. GRB 060428a, SMARTS optical/IR afterglow detection
  38. GRB060510B: Swift XRT refined analysis
  39. GRB 060510A: Refined analysis of the Swift-BAT burst
  40. GRB 060510B: Swift-BAT Refined Analysis
  41. GRB060510A: XRT refined analysis
  42. GRB060510 - SDSS Pre-Burst Observations
  43. GRB 060510B: Swift detection of a burst
  44. GRB 060510: Swift detection of a burst with optical transient
  45. GRB060507: optical afterglow detection
  46. GRB060502B: improvement in the XRT afterglow position
  47. GRB 060507: Final Refined analysis of the Swift-BAT burst
  48. GRB 060507: Swift-BAT Refined Analysis
  49. GRB 060505: PROMPT Observations
  50. GRB 060507: Swift XRT Team Refined Analysis
  51. GRB 060507: Swift detection of a burst
  52. GRB 060429: Suzaku WAM observation
  53. GRB060505: Swift/UVOT Observations
  54. GRB060425: new MASTER survey method
  55. GRB 060306: Further Analysis of SOAR and APO NIR Observations
  56. GRB 060505: Swift XRT afterglow canditate position
  57. GRB 060502b: Second epoch Gemini observations
  58. GRB 060505: Swift-BAT detection of a weak burst
  59. GRB 060428B: spectroscopy
  60. GRB 060502B: optical observations
  61. GRB 060502B: AROMA refined photometric calibration
  62. GRB 060502B MDM Follow-up Observation
  63. GRB 060502b: Gemini imaging and spectroscopy
  64. GRB060502A, optical observation
  65. GRB 060502B: Swift/UVOT upper limits
  66. GRB 060502A: Swift/UVOT source detection
  67. GRB 060502B: MDM Optical Observation
  68. GRB 060502B: Refined analysis of the Swift-BAT short burst
  69. GRB060502B: Swift XRT Team refined analysis
  70. GRB 060501: P60 Observations and Candidate Retraction
  71. GRB 060502B: Xinglong optical observation
  72. GRB060502: Swift-XRT refined analysis
  73. GRB 060502: Swift-BAT refined analysis
  74. GRB060501: Swift UVOT followup observations
  75. GRB 060502: P60 Afterglow Confirmation
  76. GRB 060502: Swift detection of a burst with an optical counterpart
  77. GRB060501: P60 imaging and afterglow candidate
  78. GRB 060501: Refined analysis of the Swift-BAT burst
  79. GRB060428B - SDSS Pre-Burst Observations
  80. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  81. GRB 060428B: MDM Observations
  82. GRB060428B: Swift XRT Team refined analysis
  83. GRB 060427B: IPN localization of a short hard burst
  84. GRB 060428B: Refined analysis of the Swift-BAT burst
  85. GRB 060428B: Xinglong I-band limit
  86. GRB 051117A: Bright host galaxy not confirmed
  87. GRB060428A: Swift/UVOT observations.
  88. GRB060428B, optical observation
  89. GRB 060428A: Refined analysis of the Swift-BAT burst
  90. GRB 060428b : Kiso R-band limit
  91. GRB 060428b: Optical afterglow candidate
  92. GRB060428A: Swift XRT Team refined analysis
  93. GRB 060428B: Swift detection of a burst
  94. GRB 060427: NIR observations
  95. GRB060427: Xinglong optical Observations
  96. GRB 060428: Swift detection of a burst
  97. GRB 060427: Swift/UVOT upper limits.
  98. GRB 060427: Refined analysis of the Swift-BAT burst
  99. GRB060427: Swift XRT Team refined analysis
  100. GRB060418: Swift XRT Team Further Refined Analysis

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