TY - JOUR

T1 - Photometry of the intermediate polar 1RXS J062518.2+733433: Characteristics of its periodic brightness variations

AU - Kozhevnikov, V.

AU - Zakharova, P.

AU - Nikiforova, T.

N1 - This study was financially supported by the “Universities of Russia” program of the Ministry of Education and Science of the Russian Federation (grant UR.02.01.436).

PY - 2006

Y1 - 2006

N2 - We present the results of our photometry of the recently discovered intermediate polar 1RXS J062518.2+733433. The observations were made using the 70 cm telescope of the Astronomical Observatory of the Ural State University with a multichannel photometer, and were carried out during 13 nights in March-May 2004. Our analysis reveals brightness variations with periods of 19.788 ± 0.003 min, corresponding to the rotational period of the white dwarf, 21.273 ± 0.003 min, corresponding to the orbital sideband, and 283.3 ± 0.5 min, which is the orbital period. The variations with the white dwarf's rotational period show a stable amplitude and a quasi-sinusoidal pulse shape persistent over a long time. In contrast, the orbital-sideband variations have an unstable amplitude and a significantly nonsinusoidal pulse shape that varies with time. Variations of the amplitude and pulse shape of the orbital-sideband variations can be related to structural changes of the accretion disk surrounding the white dwarf. © Nauka/Interperiodica 2006.

AB - We present the results of our photometry of the recently discovered intermediate polar 1RXS J062518.2+733433. The observations were made using the 70 cm telescope of the Astronomical Observatory of the Ural State University with a multichannel photometer, and were carried out during 13 nights in March-May 2004. Our analysis reveals brightness variations with periods of 19.788 ± 0.003 min, corresponding to the rotational period of the white dwarf, 21.273 ± 0.003 min, corresponding to the orbital sideband, and 283.3 ± 0.5 min, which is the orbital period. The variations with the white dwarf's rotational period show a stable amplitude and a quasi-sinusoidal pulse shape persistent over a long time. In contrast, the orbital-sideband variations have an unstable amplitude and a significantly nonsinusoidal pulse shape that varies with time. Variations of the amplitude and pulse shape of the orbital-sideband variations can be related to structural changes of the accretion disk surrounding the white dwarf. © Nauka/Interperiodica 2006.

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UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=33750896840

U2 - 10.1134/S1063772906110047

DO - 10.1134/S1063772906110047

M3 - Article

VL - 50

SP - 902

EP - 914

JO - Astronomy Reports

JF - Astronomy Reports

SN - 1063-7729

IS - 11

ER -