Rx J0744{52: a Probable New Intermediate Polar
نویسندگان
چکیده
We present optical and X-ray data of the Cataclysmic Variable RX0744{52 discovered using ROSAT by Motch et al. High resolution spectroscopy centred on the H line indicates a probable orbital period of 3.60 hrs. From its distance (obtained using polarimetry), its X-ray luminosity, its X-ray colour and its X-ray/UV+Opt ratio, we suggest that RX0744{52 is an new Intermediate Polar. The absence of a signiicant coherent modulation in the X-ray light curve suggests that RX0744{52 has either a low inclination or that the rotational and magnetic axes must be closely aligned. This is consistent with its small radial velocity amplitude.
منابع مشابه
RX J 2133 . 7 + 5107 : Identification of a new long period Intermediate Polar ⋆ ⋆ ⋆
We report the first time-resolved photometric and spectroscopic optical observations of the X-ray source RX J2133.7+5107, identified in the ROSAT survey. A clear persistent optical light pulsation is discovered with fast photometry at a period of P ω =(570.823±0.013) s which we associate with the spin period of an accreting white dwarf. Radial velocity curves of the strong emission lines show m...
متن کاملThe periods of the intermediate polar RX J0153.3+7446
We present the first optical photometry of the counterpart to the candidate intermediate polar RX J0153.3+7446. This reveals an optical pulse period of 2333± 5 s. Reanalysis of the previously published ROSAT X-ray data reveals that the true X-ray pulse period is probably 1974± 30 s, rather than the 1414 s previously reported. Given that the previously noted orbital period of the system is 3.94 ...
متن کاملRX J1016.9–4103: a new soft X-ray polar in the period gap
We have discovered a new AM Her system as the optical counterpart of the ROSAT All-Sky-Survey source RX J1016.9–4103 (≡ 1RXS J101659.4-410332). The X-ray spectrum is very soft and the X-ray intensity is strongly modulated with the orbital period. Optical photometric and spectroscopic follow-up observations reveal a synchronously rotating binary with an orbital period of 134 min, placing RX J101...
متن کاملRX J 1039 . 7 - 0507 : A New Intermediate Polar and Probable Recent Nova , possessing a large Reflection Effect
The ROSAT source RXJ1039.7-0507, known from its optical spectrum to be a Cataclysmic Variable star, is shown from high speed photometry to have an orbital period of 1.574 h. The system has a nearly sinusoidal photometric modulation with a range of 1.1 mag which we interpret as the reflection effect caused by a very hot white dwarf primary. This suggests that a nova explosion occured on the prim...
متن کاملOptical Studies of Thirteen Hard X-ray Selected Cataclysmic Binaries from the Swift-BAT Survey
From a set of thirteen cataclysmic binaries that were discovered in the Swift Burst Alert Telescope (BAT) survey, we conducted time-resolved optical spectroscopy and/or time-series photometry of eleven, with the goal of measuring their orbital periods and searching for spin periods. Seven of the objects in this study are new optical identifications. Orbital periods are found for seven targets, ...
متن کامل