Data processing []
A partial list of what I do to process data for photometry.

ugriz2UBVRI [Version 1.1]
ugriz2UBVRI is a freeware to transform SDSS u'g'r'i'z' magnitudes into Johnson-Cousins UBVRcIc magnitudes.

Transformations for differential photometry (with weights) []
An introduction to transformation coefficients and equations for differential photometry. The transformation coefficients are derived from the weighted averages and the weighted standard deviations of several measurements.

Transformation coefficients (with weights): B, V measurements [Observed: 5 Jan 2005, 24 Dec 2006, 12 Jan, 9, 15, 20 Feb, 11, 14 March,]
The transformation coefficients for my telescope and camera and B,V filters are measured and computed from weighted averages and weighted standard deviations.

Transformation coefficients (with weights): V, Rc measurements [Observed: 7 Jan 2005, 24 Dec 2006, 12 Jan, 19 July, 5 Aug, 5, 6, 12,]
The transformation coefficients for my telescope and camera and V,Rc filters are measured and computed from weighted averages and weighted standard deviations.

Transformation coefficients (with weights): V,Ic measurements [Observed: 7 Jan 2005, 5, 6, 12, 15 Sept 2007]
The transformation coefficients for my telescope and camera and V,Ic filters are measured and computed from weighted averages and weighted standard deviations.

Transformations for differential photometry []
An introduction to transformation coefficients and equations for differential photometry.

Transformation coefficients: B, V measurements [Observed: 5 Jan 2005, 24 Dec 2006, 12 Jan, 9, 15, 20 Feb, 11, 14 March,]
The transformation coefficients for my telescope and camera and B,V filters are measured.

Transformation coefficients: V, Rc measurements [Observed: 24 Dec 2006, 12 Jan, 19 July, 5 Aug, 5, 6, 12, 15 Sept 2007]
The transformation coefficients for my telescope and camera and V,Rc filters are measured.

Transformation coefficients: V,Ic measurements [Observed: 5, 6, 12, 15 Sept 2007]
The transformation coefficients for my telescope and camera and V,Ic filters are measured.