Exoplanet - star focus Constant star size

Voyager Feature Requests
1

It would be nice if the focus FWHM could be set to say 2x the minimum focus size. In this way as the seeing changes you could always focus to the FWHM of the previous frame, the averaging circle would always be optimum size.

Is there a way to do this with Robofire focus or other software.

Thanks
Doug

2

Hi Doug,

Voyager doesn’t have any way to calculate FWHM and will do not have.
This is something not useful for autofocus that use HFD.

Sorry but the feature requested is not available in Voyager.

All the best
Leonardo

3

I guess because of the hyperbolic curve used in Robofire and other similiar techniques it would difficult to extrapolate to a fixed stars size. Some sort of AI training might be needed.

Thanks for your quick reply.

Doug

4

We already use AI and do not use the hyperbolic curve or similar technics in RoboFire. We can use the HFD if you focusing in a single star , we calculate 2 different HFD value now but only in the linear side of vcurve not under… in not linear part will be not precise you can just adjust a trend.

So the answer is that we do not have this feature, so sorry.

All the best
Leonardo

5

Yes, you don’t have this feature. But I put this on the forum, to see if anyone else thought this would be useful feature who do exoplanet transits with small telescope. It’s my guess it would reduce the variance on transit time measurements. I of course could be totally wrong. But if there is enough interest, maybe it could be implemented, or some other software could be linked to Voyager.

I have been using your software for about a month now and have become a convert to it. Thanks for all your hard work.

Doug

6

I just wanted to make sure I explained to you what Voyager can do and what not about your idea.

7

Thanks for your time and input.
Doug