submitted by R. Lena,
contribution by  L. Comolli and G. Venturin.
 
 

An our  previous communication reported the flashes recorded using dark tests.
Our dark tests showed Significant spurious flashes.
Their  profiles are shown in the link below:
http://www.geocities.com/CapeCanaveral/Launchpad/7111/flashspuri.htm
 
We  has done research on this phenomenon, focusing more on the different types of noise using dark frames.
Venturin and Badalotti   have recorded that  the signature of spurious sparks on video cameras is indistinguishable from that of   stars and impact flashes.    Two cameras are necessary and  at least one may differentiate spurious sparkles from real events (that is, if both recorded a flash at the exact same time).

Image by Lorenzo Comolli (Italy)-

The image enclosed  was obtained using a CCD camera  HiSIS33, at  -25°C (SCT 20 cm f/10).  The white spots with an arrow are probably originated from cosmic rays --This is a stellar image obtained by Lorenzo Comolli (Italy)- They are spurious signals and they are similar to the stars.

On the other hand Comolli obtained spurious flashes using dark tests (like single spots and linear segments).

It  confirms   the problems concerning a  Lunar impact research and only a network is necessary.