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astro-ph1998
An Improved Orbital Ephemeris for Cygnus X-1
C. Brocksopp, A. E. Tarasov, V. M. Lyuty +1
By accumulating all available radial velocity data and combining it with our own spectroscopy we present a new and improved ephemeris for Cygnus X-1 (V1357 Cygni/HDE226868). We ini…
astro-ph1998
Optical Spectroscopy of V635 Cassiopeiae/4U 0115+63
S. J. Unger, P. Roche, I. Negueruela +3
V635 Cas is the optical counterpart of the X-ray binary system 4U 0115+63. It was previously tentatively identified as a Be star based on its optical colours and the presence of H…
astro-ph1994
Photometric and H observations of LSI+61303: detection of a 26 day V and JHK band modulation
J. M. Paredes, P. Marziani, J. Marti +12
We present new optical and infrared photometric observations and high resolution H spectra of the periodic radio star \lsi. The optical photometric data set covers the time inte…