Publications (23)
The system parameters of DW Ursae Majoris
S. Araujo-Betancor, C. Knigge, K. S. Long +8
We present new constraints on the system parameters of the SW Sextantis star DW Ursae Majoris, based on ultraviolet (UV) eclipse observations with the Hubble Space Telescope. Our d…
Rapid Oscillations in Cataclysmic Variables. XVII. 1RXS J070407+262501
J. Patterson, J. R. Thorstensen, H. A. Sheets +10
We present a study of the recently discovered intermediate polar 1RXS J070407+262501, distinctive for its large-amplitude pulsed signal at P = 480 s. Radial velocities indicate an…
The 2001 Superoutburst of WZ Sagittae
J. Patterson, G. Masi, M. Richmond +25
We report the results of a worldwide campaign to observe WZ Sagittae during its 2001 superoutburst. After a 23-year slumber at V=15.5, the star rose within 2 days to a peak brightn…
The Nonradially-Pulsating Primary of the Cataclysmic Variable GW Librae
L. van Zyl, B. Warner, D. O'Donoghue +11
The dwarf nova GW Librae is the first cataclysmic variable discovered to have a primary in a white dwarf instability strip, making it the first multi-mode, nonradially-pulsating st…
Resynchronization of the Asynchronous Polar CD Ind
G. Myers, J. Patterson, E. de Miguel +6
CD Ind is one of only four confirmed asynchronous polars (APs). APs are strongly magnetic cataclysmic variables of the AM Herculis subclass with the characteristic that their white…
Optical and ROSAT X-ray observations of the dwarf nova OY Carinae in superoutburst and quiescence
Gabriel W. Pratt, B. J. M. Hassall, T. Naylor +2
We present ROSAT X-ray and optical light curves of the 1994 February superoutburst of the eclipsing SU UMa dwarf nova OY Carinae. There is no eclipse of the flux in the ROSAT HRI l…
A 16-Year Photometric Campaign on the Eclipsing Novalike Variable DW Ursae Majoris
D. R. S. Boyd, E. de Miguel, J. Patterson +29
We present an analysis of photometric observations of the eclipsing novalike variable DW UMa made by the CBA consortium between 1999 and 2015. Analysis of 372 new and 260 previousl…
Confirmation of 1RXS J165443.5-191620 as an intermediate polar and its orbital and spin periods
S. Scaringi, S. Connolly, J. Patterson +12
Aims: We investigate the physical nature of the X-ray emitting source 1RXS J165443.5-191620 through optical photometry and time-resolved spectroscopy. Methods: Optical photometry i…
FS Aur - a new class of Cataclysmic Variables or the missing link between Intermediate Polars and SW Sex objects?
G. Tovmassian, S. Zharikov, R. Michel +6
FS Aur is a known dwarf nova with an orbital period of about 85.7 minutes. It has been assumed to be a member of the SU UMa subclass of cataclysmic variables (CVs), but previous se…
The remarkable rapid X-ray, ultraviolet, optical, and IR variability in the black hole XTE J1118+480
R. I. Hynes, C. A. Haswell, W. Cui +6
The transient black hole binary XTE J1118+480 exhibited dramatic rapid variability at all wavelengths which were suitably observed during its 2000 April-July outburst. We examine t…
A sharper view of the outer Galaxy at 1420 and 408 MHz from the Canadian Galactic Plane Survey II: The catalogue of extended radio sources
C. R. Kerton, J. Murphy, J. Patterson
A new catalogue of extended radio sources has been prepared based on arcminute-resolution 1420 MHz images from the Canadian Galactic Plane Survey (CGPS). The new catalogue provides…
The Intrinsic Shapes of Low-Surface-Brightness Dwarf Irregular Galaxies and Comparison to Other Types of Dwarf Galaxies
Eon-Chang Sung, Cheongho Han, Barbara +8
In this paper, we measure the ellipticities of 30 LSB dI galaxies and compare the ellipticity distribution with that of 80 dEs (Ryden & Terndrup 1994; Ryden et al. 1998) and 62 BCD…
Spin-orbit readout using thin films of topological insulator Sb2Te3 deposited by industrial magnetron sputtering
S. Teresi, N. Sebe, T. Frottier +11
Driving a spin-logic circuit requires the production of a large output signal by spin-charge interconversion in spin-orbit readout devices. This should be possible by using topolog…
Assisted stellar suicide: the wind-driven evolution of the recurrent nova T Pyxidis
C. Knigge, A. R. King, J. Patterson
We show that the extremely high luminosity of the short-period recurrent nova T Pyx in quiescence can be understood if this system is a wind-driven supersoft x-ray source (SSS). In…
High Speed Photometry of SDSS J013701.06-091234.9
M. L. Pretorius, P. A. Woudt, B. Warner +3
We present high speed photometry of the Sloan Digital Sky Survey cataclysmic variable SDSS J013701.06-091234.9 in quiescence and during its 2003 December superoutburst. The orbital…
LS Peg: A Low-Inclination SW Sextantis-Type Cataclysmic Binary with High-Velocity Balmer Emission Line Wings
C. J. Taylor, J. R. Thorstensen, J. Patterson
We present time-resolved spectroscopy and photometry of the bright cataclysmic variable LS Peg (= S193). The Balmer lines exhibit broad, asymmetric wings Doppler-shifted by about 2…
The photometric period in ES Ceti
C. M. Copperwheat, T. R. Marsh, V. S. Dhillon +8
We present ULTRACAM photometry of ES Cet, an ultracompact binary with a 620s orbital period. The mass transfer in systems such as this one is thought to be driven by gravitational…
Accretion-disc precession in UX Ursae Majoris
E. de Miguel, J. Patterson, D. Cejudo +25
We report the results of a long campaign of time-series photometry on the nova-like variable UX Ursae Majoris during 2015. It spanned 150 nights, with ~1800 hours of coverage on 12…
Orbital, Superhump, and Superorbital Periods in the Cataclysmic Variables AQ Mensae and IM Eridani
E. Armstrong, J. Patterson, E. Michelsen +6
We report photometric detections of orbital and superorbital signals, and negative orbital sidebands, in the light curves of the nova-like cataclysmic variables AQ Mensae and IM Er…
SDSS J162520.29+120308.7 - a new SU UMa star in the period gap
A. Olech, E. de Miguel, M. Otulakowska +13
We report results of an extensive world-wide observing campaign devoted to the recently discovered dwarf nova SDSS J162520.29+120308.7 (SDSS J1625). The data were obtained during t…
Superhumps in Cataclysmic Binaries. XXIV. Twenty More Dwarf Novae
J. Patterson, J. Thorstensen, J. Kemp +23
We report precise measures of the orbital and superhump period in twenty more dwarf novae. For ten stars, we report new and confirmed spectroscopic periods - signifying the orbital…
GW Librae: A unique laboratory for pulsations in an accreting white dwarf
O. Toloza, B. T. Gaensicke, J. J. Hermes +22
Non-radial pulsations have been identified in a number of accreting white dwarfs in cataclysmic variables. These stars offer insight into the excitation of pulsation modes in atmos…
SDSS 1507+02: A Halo Cataclysmic Variable?
J. Patterson, J. R. Thorstensen, C. Knigge
We report a photometric and spectroscopic study of the peculiar cataclysmic variable SDSS 1507+52. The star shows very deep eclipses on the 67 minute orbital period, and those ecli…