62 citations · 153 across the 4 of their papers we have counts for
4 papers
Multiwavelength monitoring of BD+53 2790, the optical counterpart to 4U~2206+54
P. Blay, I. Negueruela, P. Reig +4
We present the results of our long-term monitoring of BD+53 2790, the optical counterpart to the X-ray source 4U~2206+54. Unlike previous studies that classify the source as a Be/X…
Spectroscopic Observations of the Delta Scorpii Binary during Its Recent Periastron Passage
A. S. Miroshnichenko, J. Fabregat, K. S. Bjorkman +6
The bright star delta Sco has been considered a typical B0-type object for many years. Spectra of the star published prior to 1990 showed no evidence of emission, but only of short…
Correlated V/R and IR photometric variations in the Be/X-ray binary LS I +61 235/RX J0146.9+6121
P. Reig, I. Negueruela, M. J. Coe +3
We report on the long-term variability of the Be/X-ray binary LS I +61 235/RX J0146.9+6121. New optical spectroscopic and infrared photometric observations confirm the presence of…
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…