Multi-colour light variation of AGB stars observed with ISO

New visual light curves and infrared multi-epoch photometry are presented f or a sample of AGB-stars spectroscopically observed with ISO. While the ISO work is or will be presented elsewhere, the aim of this paper is to give a n overview of the properties of the light change of the objects. This infor mation is crucial for the interpretation of the valuable ISO material. Usin g the University of Vienna Twin Automatic Photoelectric Telescope (APT) we monitored the stars of our sample in the photometric bands V and IC. We pre sent the light curve of each object and derive the parameters of the curren t light change, such as period(s) and amplitude. Furthermore we give V IC c olours and colour variations for these objects. Our results allow us to der ive some general results on semiregular and irregular variables. Only in le ss than 50% of the cases could we confirm the GCVS period. Moreover, we did not find any pronounced difference between SRb and Lb variables in the reg ularity of the light curve. The existence of rapid oscillations indicated b y Hipparcos data could not be confirmed. In addition to the visual light ch anges we present new near infrared photometry data. Although typically only few data points are available, they can be viewed relative to the better-m onitored visual light curves providing information on possible phase shifts and differences in amplitude in different parts of the spectrum. Furthermo re, multi-epoch photometry allows us to derive mean colours for these objec ts.