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Re: (meteorobs) Leonids - Mag estimation from non-intensified video stream
Hi yK,
> Is there a way to estimate magnitude of Leonids as captured by
> non-intensified video stream. Is the normal practice of using the
> background star as reference work. Which part of the meteor do you take as
> reference - the terminal burst ( if there is one)?
I usually measure the meteor brightness in each frame and then take the
maximum value, which not necessary has to be a terminal flare. The
measurements are calibrated using known reference stars in the fov.
> As my ccd had enhanced
> IR-sensitivity and was wondering whether this will give error biased
> estimation ( compare with naked eye).
That could be, but the error should be not too large if you choose
reference stars of different spectral classes.
> What do you do with very bright
> terminal flash which appear to me over-saturate the ccd.
Estimate the brightness! :-)
I don't see a good way of measuring brightnesses of saturated meteors.
In such a case MetRec strongly underestimates the brightness, for
example.
Cheers, Sirko
--
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* Dipl.-Inform. Sirko Molau * *
* RWTH Aachen, Lehrstuhl fuer Informatik VI * __ *
* Ahornstr. 55, D-52056 Aachen, Germany * " 2B v 2B " *
* * *
* phone: +49-241-8021615 * Shakespeare *
* fax : +49-241-8888219 * *
* email: molau@informatik.rwth-aachendot de * *
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