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Re: (meteorobs) Meteor Spectra Anniversary 1897-1997
Hello Lew:
You Wrote:
>Interesting! Are we near the actual date of the anniversary, Edward?
I don't know what the actual date was. I'll have to check the back
issues of the RASC Journals to see if Millman's World list gives a date. I
just checked my references and I don't have an actual date. S.N Blazhko at
Moscow Observatory recorded 3 spectra from 1904 to 1907. The World List
only included Eight Spectra to the year 1930.
You wrote:
>BTW, what is your current equipment setup for meteor spectroscopy.
>Do you also do deep-sky or cometary spectroscopy? If your equipment
>has the sensitivity to record transient spectra, it must be fairly
>easy to do other work with it as well?
>
At present I have three spectrographs. Two modified aero cameras
with objective prisms and one 2 1/4 Square camera with an objective grating.
They will provide spectra of -2 magnitude meteors or brighter. Zero
magnitude meteors can be detected but the spectra are of little use. I'm
going to try and get a spectrum of Hale-Bopp with the grating unit once the
comet gets a little bit brighter. I'm going to piggyback the spectrograph
on a friends telescope so I can do a longer exposure without smudging. I'm
building a spectrograph using an F-2.5 - 12 inch focal length Aero Ektar
with the grating I have. This system will use 8X10 film. This specrtograph
will be quite slow and only usefull for very bright meteors but the
dispersion will be high, by meteor spectrograph standards. High dispersion
spectra of fireballs are needed, so I'm going to give this a try. I would
like to find a large grating, at least 4" X 4" for this lens, but so far I
haven't been able to find one. A new grating of this size is very
expensive, around $2000:00 US. Do you know where I could find a high
quality grating of this size but at reasonable cost? Let me know if you do!
Ed
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Edward Majden epmajden@mars.ark.com
1491 Burgess Road Meteor Spectroscopy
Courtenay, B.C. CCD's - P.E.P.
CANADA V9N-5R8 Amateur Astronomy