SIMBAD references

we have carried out a period analysis of 2-10 keV observations of the 26.5d radio periodic X-ray binary LSI+61 303 retrieved from the quick-look results database provided by the ASM/RXTE team. after applying different period search methods, we find evidence that X-ray outbursts in LSI+61 303 are very likely to recur with the same radio outburst period. Our best estimate of the LSI+61 303 X-ray period is 26.7±0.2d. The folded X-ray light curve displays a fractional change in flux by a factor of ∼5 and its highest emission level overlaps with the active state of the radio emission.