A photometric study of the X-ray source E2003+225, an AM Herculis star

Astronomy and Astrophysics – Astronomy

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Binary Stars, Light Curve, Stellar Spectrophotometry, X Ray Sources, Variable Stars, X Ray Stars

Scientific paper

The brightness of E2003+225 has been measured on 335 plates in the Moscow collection taken during 1962-1982. The photometric behavior shows parallels with AM Her and MV Lyr. No prolonged inactive states have been found. No single period P can fit all the measurements; a search in the range P = 0.152-0.157 days yields different possible values for each of four observing seasons. E2003+225 is the second AM Her-type binary system having P greater than 3 hours.

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