A. P. Smale
University of Oxford
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by A. P. Smale.
Space Science Reviews | 1985
A. P. Smale; R. H. D. Corbet; P. A. Charles; J.W. Menzies; P. Mack
We present the first results of an EXOSAT observation of the low-mass X-ray burster 4U1735-44. The ME data show low-amplitude variations in the persistent flux including two 5% dips separated by ~ 4 hours. The structure of the single observed burst is briefly described. Five hours of simultaneous B-band photometry were obtained at SAAO with 12 minute time resolution; a stronganti-correlation is shown to exist between the X-ray and optical flux, with a high level of significance. A model for this behaviour is suggested, based on reprocessing of the X-ray flux in a corona or stellar wind.
Space Science Reviews | 1985
R. H. D. Corbet; A. P. Smale; J.W. Menzies; G. Branduardi-Raymont; P. A. Charles; K. O. Mason
We present optical spectroscopy and photometry of 4U 1258-61 obtained over the course of six years. Evidence for the evolution of a circumstellar envelope throughout the course of the observations is presented.
Space Science Reviews | 1985
P. A. Charles; R. H. D. Corbet; K. Mukai; A. P. Smale; S.M. Kahn; L. V. Kuhi; A. Brown
A highly variable point X-ray source, first seen by the Einstein IPC, has been positioned with the EXOSAT CMA and identified with a bright (V = 8.5) K0 star. Although in the direction of the southern half of the Cygnus Loop, this star is almost certainly a foreground object and typical of other active cool stars that are related to RS CVn systems.An EXOSAT program to study T Tauri stars failed to detect T Tau itself. However, a strong X-ray source was observed 15′ from T Tau, which in its turn had not been seen by Einstein. This new source has been identified with a hitherto unstudied 13 mag star which is likely to be a dMe flare star.The young star cluster NGC 2264 was observed with the EXOSAT CMA in an attempt to identify the sources found during an Einstein IPC study of S Mon. Apart from S Mon itself, only UV-bright objects were seen, but several of these are considered likely counterparts of the Einstein sources.
Monthly Notices of the Royal Astronomical Society | 1988
A. P. Smale; R. H. D. Corbet; P. A. Charles; S. A. Ilovaisky; K. O. Mason; C. Motch; K. Mukai; T. Naylor; A. N. Parmar; M. van der Klis; J. van Paradijs
Monthly Notices of the Royal Astronomical Society | 1986
R. H. D. Corbet; A. P. Smale; J. Menzies; G. Branduardi-Raymont; P. A. Charles; K. O. Mason; L. Booth
Monthly Notices of the Royal Astronomical Society | 1987
R. H. D. Corbet; J. R. Thorstensen; P. A. Charles; W. B. Honey; A. P. Smale; J. Menzies
Monthly Notices of the Royal Astronomical Society | 1986
R. H. D. Corbet; John R. Thorstensen; P. A. Charles; J. W. Menzies; T. Naylor; A. P. Smale
Monthly Notices of the Royal Astronomical Society | 1986
K. Mukai; J.M. Bonnet-Bidaud; P. A. Charles; R. H. D. Corbet; L. Maraschi; J. P. Osborne; A. P. Smale; A. Treves; M. van der Klis; J. van Paradijs
Monthly Notices of the Royal Astronomical Society | 1989
R. H. D. Corbet; A. P. Smale; P. A. Charles; W. H. G. Lewin; J. Menzies; T. Naylor; W. Penninx; M. Sztajno; J. R. Thorstensen; J. Trumper; J. van Paradijs
Monthly Notices of the Royal Astronomical Society | 1986
A. P. Smale; R. H. D. Corbet; P. A. Charles; J. Menzies; P. Mack