Affiliation
American Association of Variable Star Observers (AAVSO)
Sat, 04/17/2021 - 18:50
Would welcome any help as I try to get TG and python operational. Can not seem to navigate these two programs. Specifically I can not find the file c:/ProgramData/Anaconda3 on my machine?
bryan
Bryan:
Did you install Anaconda/Python on your computer in accordance with instructions found under TG under Transformation in AAVSO web page? If so, during the install, did you define where you wanted the program installed? Did you select "you only" or "everyone" during install?
Ken
I did follow those instructions
I can open python GUI but the modules are foreign to me . . .as is python for that matter
When I open TG it tries to reinstall python, I installed python 3.9 but same problem
Has AAVSO ever offered a class specifically on transformation?
bryan
"Has AAVSO ever offered a class specifically on transformation?"
Bryan,
Once per year the AAVSO offers a 4 week CHOICE course called CCD Photometry, part 2, AKA CCD2. Although a number of other important topics are covered in this course, one week is devoted to the theory and practice of calculating transforms. The students use the spreadsheet method described in Chapter 6 of the AAVSO CCD Photometry Guide. Many experienced AAVSO observers believe that calculating transforms at least once using the spreadsheet method provides a clearer understanding of the subject than starting right off with transforms using TG.
Chapter 6 uses M67 as the standard cluster. This is observable now. This year the course will use NGC 7790 standard stars when it is offered in the fall.
You don't need to take the class to learn the spreadsheet method. If you want to try it on your own, I'm sure you would find lots of support in the forums if you have questions or run into problems. It really is quite straight forward. Unless you are constantly fiddling with your system, you only need to renew your transforms one or twice per year. You may find the spreadsheet method is all you need.
Phil
Thanks for the information. I am working my way through all the choice classes.
I have built a spreadsheet and tested with the examples in the photometry syllabus and the numbers check out so I will continue to work on that.
My transformed mags are different for several of my targets compared to AAVSO data and APASS, especially in B.
I am repeating my data reductions and trouble shooting my calibrations and watching the snow fly.
thanks for your help, I have spent about a year working on the various aspects of this hobby and impressed by how much others are available to assist
bryan