[Aavso-photometry] Beginner CCD Questions..

[Neil Butterworth]

Hi Derek,

I observe with an 8" LX200 with a ST7e CCD camera in alt-az mode,
and I have sent about 30,000 obs. to AAVSO, and many thousands
to CBA.
The only restriction I find is not to observe within about 15 degrees of
the zenith.
I try and keep my exposures under about 45 seconds, not because of
rotation, but the tracking is not too good.
If I want to get below magnitude 12.5 to 13.0 or so, I stack images until I
get the SNR I want for that object.
You should have no trouble getting down to mag 16 with your 12".

So don't give it away, have a go!!

Neil Butterworth  (BIW)


----- Original Message ----- 
From: "Derek C Breit" <breit_ideas at hotmail.com>
To: <Aavso-photometry at mira.aavso.org>
Sent: Friday, August 03, 2007 3:16 PM
Subject: Re: [Aavso-photometry] Beginner CCD Questions..


> So from what I see, essentially I might be able to do, essentially, a
> whole lot of work to come up with essentially what the Visual observers
> can do, only I *might* be able to achieve a bit better precision and
> accuracy by using the CCD Charts on stars mag 11 and brighter..
>
> This does not really fit in with anything listed on the AAVSO website..
> Not following a star beyond the reach of the Visual observers, that's
> for sure..
>
> So, I will just familiarize myself with the process, so that when I buy
> or build a wedge, I will be ready to do something worthy of reporting..
>
> Hopefully that doesn't take me another 5 years..
>
> For now, I just can't see going to all this trouble when I can just do
> visual, and I have no real interest in putting the mobile 12" scope on a
> wedge.
>
> So back I go into my corner to watch..
>
> Derek
>
>
>
> BREIT IDEAS Obs - http://www.poyntsource.com/New/index.htm
> Western USA     - http://tech.groups.yahoo.com/group/IOTA-West/
> IOTA listserver - http://groups.yahoo.com/group/IOTAoccultations/
> IOTA Website    - http://www.lunar-occultations.com/iota/iotandx.htm
>
>
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