[vsnet-chat 891] Re: Magnitudes, sequences, etc

["William S G Walker" <astroman@voyager.co.nz>]

Brian, Arne, et al, 

Thanks for the comments. at this stage all that's needed at this end is
getting some familiarity with the equipment. The filters are now in place
but last night was cloudy when I had it all together. 

I note Taichi Kato's comments re doubles - we've always found them
unreliable in sequences - better to ignore them completely. The Mira
sequences will come anyway as part of another programme but only whatever
is close to the programme star. There will be some jitter in the
positioning so we might get a 10' radius after a dozen or more frames.

I note Arne's comments re SN ratios. Many of the pe sequences in the
southern sky
for VSS charts were done with initial SN about 1:10 with about half a dozen
runs to reduce this to an acceptable 5-10%. Things have come a long way.
We'll see what happens -
thanks.

Stan


----------
> From: Brian Skiff <bas@lowell.edu>
> To: astroman@voyager.co.nz
> Cc: vsnet-chat@kusastro.kyoto-u.ac.jp
> Subject: [vsnet-chat 882] Re: Magnitudes, sequences, etc
> Date: Friday, May 01, 1998 5:52 PM
>

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