The soft X-ray properties of the polar EK UMa | Zendy

K. L. Clayton | Zendy; J. P. Osborne | Zendy

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The soft X-ray properties of the polar EK UMa

Author(s) -

K. L. Clayton,

J. P. Osborne

Publication year - 1994

Publication title -

monthly notices of the royal astronomical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.058

H-Index - 383

eISSN - 1365-8711

pISSN - 0035-8711

DOI - 10.1093/mnras/268.1.229

Subject(s) - physics , rosat , astrophysics , flux (metallurgy) , luminosity , polar , phase (matter) , light curve , x ray , atomic physics , optics , galaxy , astronomy , materials science , quantum mechanics , metallurgy

We present the first extensive soft X-ray observation of the polar EK UMa (1E1048.5+5241)(1E1048.5+5241). The complete orbital light curve obtained from this ROSAT observation shows a single bright phase of width Δϕ=0.63.Δϕ=0.63. EK UMa is not detected outside this phase interval. During the bright phase a number of deep dips in the flux are seen. These dips can be caused by an additional absorption of 8×10[Superscript: 18]<ΔNH<3×10[Superscript: 20]atomcm[Superscript: −2]. The soft X-ray spectrum has an unusually high temperature of 50

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