IGR J00234+6141 : a new INTEGRAL source identified as an Intermediate polar

Abstract

Following an extensive survey of the galactic plane by the INTEGRAL satellite, new hard X-ray sources are discovered with a significant fraction of Cataclysmic Variables (CVs) among them. We report here the identification of one of these hard X-ray sources, IGR J00234+6141, as an accreting magnetic white dwarf of intermediate polar type. We analyse the high energy emission of the INTEGRAL source using all available data and provide complementary optical photometric and spectroscopic data obtained respectively in August and October 2006. Based on a refined INTEGRAL position, we confirm the proposed optical identification. We clearly detect the presence of a 564 s periodic optical modulation that we identify as the rotation of the white dwarf. The analysis of the optical spectrum also demonstrates that the emission lines show a modulation in radial velocity with an orbital period of Porb = (4.033 +/- 0.005) hr. The two periodicities indicate that IGR00234+6141 is a magnetic CV of the intermediate polar type. This is one of the faintest and hardest sources of this type detected by INTEGRAL. This confirms earlier conclusions that IPs contribute significantly to the population of galactic X-ray sources and represent a significant fraction of the high energy background.

6 pages, 7 figures, accepted for publication in A&A

References in corpus (12)

• ISGRI: the INTEGRAL Soft Gamma-Ray Imager
• First Results from the All-Sky Monitor on the Rossi X-ray Timing Explorer
• The Donor Stars of Cataclysmic Variables
• 20-100 keV properties of cataclysmic variables detected in the INTEGRAL/IBIS survey
• INTEGRAL survey of the Cassiopeia region in hard X rays
• Identification of selected sources from the ROSAT Galactic Plane Survey - I
• Using the ROSAT Catalogues to find counterparts for the second IBIS/ISGRI Survey Sources
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. IV. A study of six new hard X-ray sources
• BeppoSAX observations of soft X-ray Intermediate Polars
• The X-ray emission of the Intermediate Polar V709 Cas
• XSS J00564+4548 and IGR J00234+6141 -- new cataclysmic variables from RXTE and INTEGRAL all sky surveys
• INTEGRAL Broadband X-ray spectrum of the intermediate polar V709 Cas

Cited by in corpus (16)

• Magnetic White Dwarfs
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. VI. A multi-observatory identification campaign
• White dwarf masses in intermediate polars observed with the Suzaku satellite
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. VII. Identification of 20 Galactic and extragalactic hard X-ray sources
• Characterization of new hard X-ray Cataclysmic Variables
• INTEGRAL/IBIS and Swift/XRT observations of hard cataclysmic variables
• Chandra Localizations and Spectra of INTEGRAL Sources in the Galactic Plane
• Hard X-ray properties of magnetic cataclysmic variables
• 1RXSJ173021.5-055933: a cataclysmic variable with a fast-spinning magnetic white dwarf
• Broad-band properties of the hard X-ray cataclysmic variables IGR J00234+6141 and 1RXS J213344.1+510725
• IPHAS J062746.41+014811.3: a deeply eclipsing intermediate polar
• RXTE and XMM observations of intermediate polar candidates
• Influence of Compton scattering on the broad-band X-ray spectra of intermediate polars
• Chandra Observations of High Energy X-ray Sources Discovered by INTEGRAL
• Very fast photometric and X-ray observations of the intermediate polar V2069 Cygni (RX J2123.7+4217)
• Extensive photometry of the intermediate polar V1033 Cas (IGR J00234+6141)