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(meteorobs) Re: EMO Perseid Spectra Report

Congratulations Ed!

It sounds like a fine effort and the results are not too bad considering
it was not the night of maximum activity.

Keep up the good work!

Bob 

epmajden wrote:
> 
>          EMO SPECTROGRAPHIC  PRELIMINARY PERSEID REPORT
> 
>  A single image intensified meteor spectrograph was setup at my observatory
> in Courtenay B.C. on Vancouver Island on August 13/14.  The system consisted
> of a so called "Astro Grade" 2nd generation image intensifier fitted with a
> Canon F-1.4 - 50 mm lens and a precision 600 g/mm transmission grating
> blazed for 4000A.  The intensifier screen was imaged with a Hi8 video camera
> recording on a standard VHS recorder.   Richard Hill, a member of our west
> coast fireball network helped me setup and kept me company during the first
> part of the patrol.  We got started at 06h UT 14 Aug. and shut down at
> 11:15h UT.  We recorded 3 spectra and 9 zero order direct meteor tracks an
> one UFO! :-)  An insect took a liking to the green glow of the intensifier
> screen and sometimes was imaged walking across it.  Darned near ruined  one
> of the spectra.  Oh well, another problem to solve!
>     The images were recorded as follows:
> 
> No. 1    06:24:38 UT  -  Direct Perseid meteor track, zero order,  no
> spectrum
> 
> No.2    07:24:27 UT  -   Direct Perseid meteor track, zero order,  no
> spectum
> 
> No.3    08:00:00 UT  -   Perseid Spectrum - O l oxygen green line recorded
> 
> No.4    08:10:29 UT  -   Direct Perseid meteor track, zero order, no
> spectrum
> 
> No.5    08:11:33 UT  -   Direct Non-Perseid meteor track, no spectrum
> 
> No.6    08:56:45 UT  -   Direct Perseid meteor track, zero order, no
> spectrum
> 
> No.7    09:28:27 UT  -   Direct Perseid meteor track, zero order, no
> spectrum
> 
> No.8    09:47:49 UT  -   Perseid Spectrum - with 0 l oxygen green line
> recorded
> 
> No.9    10:06:32 UT  -   Direct Perseid meteor track, zero order, no
> spectrum
> 
> No.10  10:10:51 UT  -  Direct Perseid meteor track, zero order, no spectrum
> 
> No.11  10:52:19 UT  -  Direct faint meteor track, no spectrum
> 
> No.12  11:03:02 UT  -  Non -Perseid Spectrum - Little information as
> dispersion direction
>                                        poor.
> 
> No.13  11:08:48 UT -  Direct meteor track - no spectrum
> 
>     The Sandia All-sky Video tapes were checked for meteor detections and
> none of the meteors recorded by the spectrograph were imaged by the all-sky.
> That would make them all less than ~-2.0  magnitude and therefore would not
> have been recorded by a conventional photographic spectrograph using film.
> Only 3 brighter than -2.0 magnitude meteors were recorded by the Sandia
> All-sky but these were unfortunately not in the field of view of the image
> intensified spectrograph.  It only has a circular field of view of around 25
> degrees.
> 
> The Sandia All-sky images were recorded as follows:  14 August 1999
> 
>     09:45:39 UT  Perseid  ~-3.0 magnitude
>     10:02:10 UT Perseid   ~-5.0 magnitude
>     10:41:58 UT Perseid   ~-4.0 magnitude
> 
> All-in-all, the program was very successful for a first try using the image
> intensifier video system.  It's too bad it was not clear for the night of
> maximum!
> 
> Ed Majden - AMS Meteor Spectroscopy Program Coordinator
> 
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