Ray,

Can you collect PEC data on different nights with and without a focal reducer installed or with this negatively impact my new added curves (one curve @ F7.7 and original data @ F11?)

Thanks!

Kurt

Hi Kurt,

Sure, you can collect data at different image scales. Just try to use an image scale at 2.0 arc-sec/pixel or better.

-Ray

Thanks Ray,

Can you also see the attached curves and let me know your opinion on the correct course of action:

Blue curve is the mount PEC data taken from 3 earlier runs.

Red curve is new PEC data with PEC on (without logrithmic fitting) - looking at the two curves it seems like I should use the "subtract" function to create the new green curve, is this correct?

Also, should I use logrithmic fitting to create the new red curve? If so, cubic or quartic will produce a new red PEC curve of 3.85 P-P and .92 RMS - this seems like the data would be to good to have the desired effect on the current blue curve?

Any thoughts?

Thank you!

.txt file attached...

PemPro-2009-07-11-235213.txt (60 KB, 10 downloads)

Hi Kurt,

Have you looked at the RCX case study in the help? It goes through the whole process of collecting data and refining. Even though the RCX is a different type of scope the interface to the PEC on the mount is almost identical.

http://www.siriusimaging.com/H.../rcx400casestudy.htm

-Ray