  An analysis of adaptive optics K-band imaging data of GQ Lup acquired in 1994
by the first generation adaptive optics system ComeOn+ at the ESO 3.6m optical
telescope in La Silla is presented. The data reveal a likely candidate for the
low-mass companion recently reported in the literature. An a posteriori
detection in the 11 year old data would provide a useful astrometric data point
for the very long period (~1000 yr) orbit of the GQ Lup system. However, the
data is severely contaminated by speckle noise at the given projected
separation, which decreases the confidence of the detection. Still, from the
data we can conclude that GQ Lup B is not an unrelated background source, but
instead a physical companion to GQ Lup A. We present here the reduction and
analysis of the ComeOn+ images, as well as the results. We also discuss the
nature of the companion based on data and models available in the scientific
literature and examine claims made regarding the classification of the object
as a planet.
