An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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X-ray persistent
  پرتو ِ X پریستنده  
partow-e X paristandé
Fr.: rayons X persistants  

An → X-ray source that does not display emission → outbursts, in contrast to → X-ray transients.

See also: → X-ray; → persistent.