269 citations · 728 across the 18 of their papers we have counts for
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RXTE determination of the intermediate polar status of XSS J00564+4548, IGR J17195-4100, and XSS J12270-4859
O. W. Butters, A. J. Norton, P. Hakala +2
Aims: We determine the nature of the intermediate polar candidates XSS J00564+4548, IGR J17195-4100, and XSS J12270-4859. Methods: Pointed RXTE observations searched for intermedia…
Orbital periods of cataclysmic variables identified by the SDSS. II. Measurements for six objects, including two eclipsing systems
John Southworth, T. R. Marsh, B. T. Gaensicke +4
Continuing our work from Paper I (Southworth et al., 2006) we present medium-resolution spectroscopy and broad-band photometry of seven cataclysmic variables (CVs) discovered by th…
3D eclipse mapping in AM Herculis systems - `Genetically modified fireflies'
Pasi J. Hakala Mark Cropper Gavin Ramsay
In order to map the 3-dimensional location and shape of the emission originating within the accretion stream in AM Her systems, we have investigated the possibilities of relaxing t…
RX J0806+15: the shortest period binary?
G. Ramsay, P. Hakala, M. Cropper
The X-ray source RX J0806+15 was discovered using ROSAT, and shows an X-ray light curve with a prominent modulation on a period of 321.5 sec. We present optical observations in whi…
On the multi-periodicities in the X-ray dipper XB 1916-053
L. Homer, P. A. Charles, P. Hakala +4
Using the Rossi X-ray Timing Explorer and the Nordic Optical Telescope we have obtained the highest ever quality X-ray/white-light high-speed photometry of XB 1916-053. We refine t…
Detection of the optical counterpart of the proposed double degenerate polar RX J1914+24
Gavin Ramsay, Mark Cropper, Kinwah Wu +2
We have detected the optical counterpart of the proposed double degenerate polar RX J1914+24. The I band light curve is modulated on the 9.5 min period seen in X-rays. There is no…
UV Spectroscopy of AB Doradus with the Hubble Space Telescope. Impulsive flares and bimodal profiles of the CIV 1549 line in a young star
O. Vilhu, P. Muhli, J. Huovelin +3
We observed AB Doradus, a young and active late type star (K0 - K2 IV-V, P= 0.514 d) with the Goddard High Resolution Spectrograph of the post-COSTAR Hubble Space Telescope with th…
Automated Source Classification using a Kohonen Network
Petri Mahonen, Pasi Hakala
We report progress in the development of automatic star/galaxy classifier for processing images generated by large galaxy surveys like APM. Our classification method is based on ne…