186 citations · 286 across the 9 of their papers we have counts for
9 papers · 1 filter
The mass of the neutron star in SMC X-1
A. K. F. Val Baker, A. J. Norton, H. Quaintrell
We present new optical spectroscopy of the eclipsing binary pulsar Sk 160/SMC X-1. From the He I absorption lines, taking heating corrections into account, we determine the radial…
The mass of the neutron star in Vela X-1 and tidally induced non-radial oscillations in GP Vel
H. Quaintrell, A. J. Norton, T. D. C. Ash +5
We report new radial velocity observations of GP Vel/HD77581, the optical companion to the eclipsing X-ray pulsar Vela X-1. Using data spanning more than two complete orbits of the…
Constraints on Jupiters from observations of Galactic Bulge microlensing events during 2000
Yiannis Tsapras, Keith Horne, Richard Carson +9
We present observations of 8 Galactic Bulge microlensing events taken with the 1.0m JKT on La Palma during 2000 June and July. The JKT observing schedule was optimized using a prio…
Pulsations and orbital modulation of the intermediate polar 1WGA J1958.2+3232
A. J. Norton, H. Quaintrell, S. Katajainen +3
We present optical photometry, spectroscopy and photopolarimetry, as well as ASCA X-ray observations, of the recently discovered intermediate polar 1WGA J1958.2+3232. Through the f…
RXTE Observations of Hercules X-1 During the July 1998 Short-high State
Martin Still, Kieran O'Brien, Keith Horne +5
We present RXTE monitoring of the eclipsing X-ray binary Hercules X-1 conducted over the short-high state of July 1998. This was one of the last major short-high states before the…
Atmospheric reflection during an anomalous low-state of Hercules X-1
Martin Still, Kieran O'Brien, Keith Horne +6
We present RXTE observations of the eclipsing X-ray binary Hercules X-1 conducted during an anomalous low state. Data reduction reveals a light curve over 2.7 orbital cycles remark…