The advent and use of CCD detectors has been the panacea for
increasing the accuracy and the sampling of photometric data in
However, for obtaining a high signal to noise ratio are necessary
in the most popular telescopes exposure times of the order of several
minutes. This fact represents a strong limit for the detection
and the analysis of optical phenomena which takes place on shorter
time scales. In the broad class of transient and/or rapid optical
phenomena are included several groups of variable stars such as
the Flare and Flashes stars and the UV Ceti stars. Even though these
objects have been observed both in the field and in stellar systems
up to now we still lack detailed and homogeneous sample of photometric
data. Both the large field and the very high time resolution of this
detector would allow extensive detecting and measuring of these objects.
Thus providing useful suggestions on the time-scale within which
they approach the main sequence and on their pulsation behavior.
In passing we note that the fast photometry technique can also
play a key role in the detection of optical phenomena associated to
soft X-ray sources belonging to Galactic stellar systems or to
hard X-ray sources in the field.
Finally we mention that the coupling between a large field detector,
the fast photometry and the spectroscopic facilities of LBT would
allow investigating the optical emission and the spectroscopic
properties of transient phenomena in situ.
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