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On the naming convention used for multiple star systems and extrasolar planets
F. V. Hessman, V. S. Dhillon, D. E. Winget +6
The present naming convention for extrasolar planets used by the vast majority of researchers in the field is based upon an interpretation of the provisional I.A.U. standard for mu…
Massive unseen companions to hot faint underluminous stars from SDSS (MUCHFUSS) - Analysis of seven close subdwarf B binaries
S. Geier, P. F. L. Maxted, R. Napiwotzki +12
The project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) aims at finding hot subdwarf stars with massive compact companions like massive white dw…
Probing GRB environments with time variability: ULTRASPEC fast imaging of GRB 080210
A. De Cia, P. Jakobsson, G. Björnsson +12
We present high time resolution (1.09 s) photometry of GRB 080210 obtained with ULTRASPEC mounted on the ESO/3.6-m telescope, starting 68.22 min after the burst and lasting for 26.…
V391 Peg: identification of the two main pulsation modes from ULTRACAM u'g'r' amplitudes
Roberto Silvotti, Suzanna Randall, Vik S. Dhillon +5
V391 Peg (HS2201+2610) is an extreme horizontal branch subdwarf B (sdB) star, it is an hybrid pulsator showing p- and g-mode oscillations, and hosts a 3.2/sini M_Jup planet at an o…
Multi-site Observations of Pulsation in the Accreting White Dwarf SDSS J161033.64-010223.3 (V386 Ser)
Anjum S. Mukadam, D. M. Townsley, B. T. Gaensicke +20
Nonradial pulsations in the primary white dwarfs of cataclysmic variables can now potentially allow us to explore the stellar interior of these accretors using stellar seismology.…
Spectroscopic Evidence for a 5.4-Minute Orbital Period in HM Cancri
G. H. A. Roelofs, A. Rau, T. R. Marsh +3
HM Cancri is a candidate ultracompact binary white dwarf with an apparent orbital period of only 5.4 minutes, as suggested by X-ray and optical light-curve modulations on that peri…
Observations of the quiescent X-ray transients GRS 1124-684 (=GU Mus) and Cen X-4 (=V822 Cen) taken with ULTRACAM on the VLT
T. Shahbaz, V. S. Dhillon, T. R. Marsh +3
We present high time-resolution multicolour optical observations of the quiescent X-ray transients GRS1124-684 (=GU Mus) and Cen X-4 (=V822 Cen) obtained with ULTRACAM. Superimpose…