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10/22/2019 Update!

The TransformApplier functionality has now been moved to VPhot!

The TA application is coming up on EOL (End-Of-Life). It was written in Borland C++5 which is now 30 (40?) years old. It can't handle HTTPS which will be the standard of the new website and which should be used by all web applications. And it had the inherent limitation of being a windows only application, leaving the mac community with out its use.

Transforms: Everything you need to transform your CCD observations

This page serves as a central location for the tools AAVSO voulnteers have developed and promulgated to help fellow photometrists transform their observations, making them compatible and more useful to the professional astronomy community.

These include:

Photometry Transformation Generation Program

The Photometry Transformation Generation Program (PTGP) has been renamed to Transform Generator (TG) and is now located here:

AAVSO 49 Bay State Rd. Cambridge, MA 02138 617-354-0484