Earthshine blog

Earthshine blog

"Earthshine blog"

A blog about a system to determine terrestrial albedo by earthshine observations. Feasible thanks to sheer determination.

V-VE1 colour map

Post-Obs scattered-light rem.Posted by Chris Flynn Apr 07, 2013 03:59AM
In the previous post, we noticed that the VE1 and IRCUT filters have very similar profiles to the V band -- at least for the data we obtained pointing at Arcturus.

Here we show a colour map (V-VE1, on an arbitrary magnitude scale: properly calibrated colours will come later).



It's clear that the deep artifacts around the edge of the moon are much smaller now, compared to the B-V colour maps we have been producing to date.

Data used:

2456015.7558321MOON_V_AIR_averaged.fits 2456015.8108611MOON_VE1_AIR_averaged.fits

This shows that the core of the PSF of the V and VE1 filters are quite similar -- and the power law tails as well -- not just for Arcturus but for lunar images too.




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Posted by Chris Flynn Apr 07, 2013 12:42PM

I think so too -- had the same thought -- although I think it could get technically tricky in practice. It would be great to talk to some deconvolution person about the 2-D deconv, working from mock lunar images (say). Actually I'd like to give that a try myself, hope to in the next few days...

Posted by Peter Apr 07, 2013 12:38PM

Super test, actually! Could one devise some way of generating psfs from the requirements of certain image differences?