[Aavso-photometry] Atmospheric extinction questions

[Dirk Terrell]

On 5/14/2008 Wolfgang Renz wrote:
> Hi Jim
> 
> >> >> ... Bruce Gary's book on ExoPlanet Light Curves ...
> > > Is that book available on line?  I've been sending Bruce 
> ExoPlanet Light 
> > > curves and was wondering about how he corrects them for air mass.
> 
> Yes, it is:
> 'Exoplanet Observing for Amateurs', online book home page

I'm beginning to think Wolfgang is the Google of observational 
astronomy. :-)

Dirk