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RE: (meteorobs) Observations 21-28/08/2003
Hi all and probably especially Rainer!
following the previous mail about the early AUR activity I'd like o report
something very similar. The activity of the PER should finish about August
24 according to the IMO working list, but we think that we could see many of
them all the week from 24 to 31 - and this is not a question on a single
meteor, but a large number of individual events reported by diferent
obsevers. So we took the PER radiant (linearily extrapolating the radinat
shift outside the given period) as an active one. But this has risen an
unpleasant problem. As both AUR and PER radiants were situated in almost the
same azimuth above the western horizon, it became in many cases impossible
to ditinguish between AUR adn PER members even though we used plotting all
the time. Yes, we tried to chose the field of view in ordred to get the best
geometry for this, but if you look anywhere on the sky, you still see a lot
of meteors in the zenith, where the AUR-PER decision was almost impossible
(with theit almost similar speeds). Overmore, we were often pushed to look
to zenith by the clouds all around on the horizon.
And now there is the problem! We say that PERs are active even now, bacuse
we saw some meteors that seem to be PER and are definitely not AUR. But
looking back through all the week, we see, that the largest number of
meteors that we have marked as PER will fit also with the AUR radiant (but
with less acuracy, that's why we chose PER for them). So when our conclusion
that PER are active is not right (e. g. all the "sure non AUR" PER meteors
were sporadics or so) we might have misreported many true AURs and thus
artificially lowered their rates! Any suggestions?
Jan Verfl
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