I hope my question is not too silly, but I´m still a newbie and have a doubt about the use I (as an european observer) can make of AAVSO´s predictions&bulletins.
I was planning my observing session when I realized that the AAVSO yearly bulletins, as well as the eclipsing binary&long period predictions, have been calculated and are valid for american longitudes. The same applies to the extended Milwaukee list of predictions.
¿Is there an easy way to "transform" them to european longitudes? (I´ve tried to obtain an answer to this by myself through forums search and internet surfing but have not found any clear statement on this topic). I´ve also found that there is a software tool for MS-DOS O.S. called EBMin23, by Bob Nelson, and after downloading and executing it, I think I could generate a customized ephemerides list depending in the longitud and latitute of the observer (though one must fill-in an excel containing some variable stars data, as far as I understand).
Also I´ve discovered the BAAVSS site, which includes some interesting estimations.
I live in an area with Greenwich timezone, although at +28º North latitude (Canary Islands, Spain).
If I´m not wrong, I think I can make use of the same prediction times calculated for England (e.g. from BAAVSS), and the only special thing I must take into account (due to the different latitude) is the fact that there could be stars in such ephemerides that are placed too north in the sky for my observing site (cos' I´m more than 20 degrees south from England) .
Thanks in advance for your feedback and best regards!