Butters, O. W.; Norton, A. J.; Mukai, K. and Tomsick, J. A.
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|DOI (Digital Object Identifier) Link:||http://doi.org/10.1051/0004-6361/201015848|
|Google Scholar:||Look up in Google Scholar|
Aims. To determine the credentials of nine candidate intermediate polars in order to confirm whether or not they are magnetic cataclysmic variables.
Methods. Frequency analysis of RXTE and XMM data was used to search for temporal variations which could be associated with the spin period of the magnetic white dwarf. X-ray spectral analysis was carried out to characterise the emission and absorption properties of each target.
Results. The hard X-ray light curve of V2069 Cyg shows a pulse period of 743.2 s, and its spectrum is fit by an absorbed bremsstrahlung model with an iron line, confirming this to be a genuine intermediate polar. The hard X-ray light curve of the previously confirmed intermediate polar IGR J00234+6141 is shown to be consistent with the previous low energy X-ray detection of a 563.5 s pulse period. The likely polar IGR J14536-5522 shows no coherent modulation at the previously identified period of 3.1 hr, but does exhibit a clear signal at periods likely to be harmonically related to it. Whilst our RXTE observations of RX J0153.3+7447, Swift J061223.0+701243.9, V436 Car and DD Cir are largely too faint to give any definitive results, the observation of IGR J16167-4957 and V2487 Oph show some characteristics of intermediate polars and these objects remain good candidates.
Conclusions. We confirmed one new hard X-ray selected intermediate polar from our sample, V2069 Cyg.
|Item Type:||Journal Article|
|Copyright Holders:||2010 ESO|
|Keywords:||binaries; X-ray spectral analysis; novae; cataclysmic variables|
|Academic Unit/Department:||Science > Physical Sciences
|Interdisciplinary Research Centre:||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)|
|Depositing User:||Andrew Norton|
|Date Deposited:||04 Jan 2011 16:58|
|Last Modified:||24 Feb 2016 06:23|
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