V480 Tau - normal fluctuation or outburst ?

Hello Experts

I am not an expert in variable Stars and also not in photometry.
I normaly make astrometry of minor planets.

On a series of 18 old frames (October 2011) taken in a total
duration of about 1 hour at Taunus Observatory (60cm Cassegrain+SBIG 11000)
I have seen a variable Star changing brightness. I found out
it is V480 Tau. V480 Tau should have an amplitude of 0,04mag and has a brightness of 5mag.
see:
http://www.sai.msu.su/gcvs/cgi-bin/search.cgi?search=V480+Tau [1]

But for my eyes the amplitude seems to be higher.
Please have a look at my animation here:
http://erwinschwab.de/images/Animation-V480Tauri-ausschnitt.gif [2]

I did not analyse the frames, because Iam not an expert of photometry
and for the astrometry software, which I use, such a wide apertur was not possible.

My question now is: Is that what you can see in the animation the normal fluctuation of 0,04mag?
Does anybody want to have the 18 frames for analyse or is it not so important?

Gruss Erwin