[Aavso-photometry] Peranso vs Minima V2.3 question

[Michael Koppelman]

My first reaction to Yenal's original email was: welcome to the world  
of computational physics! There are many factors which can make  
different implementations of the same algorithms vary, many of which  
Michael mentioned.

The error reported for Minima (as an example) was 0.00007 or about 6  
seconds. The difference between Minima and Peranso is about 14  
seconds, which is ~2 sigma of the Minima result. So they agree! You  
could use any of the results and be fine since they all fall within 3x  
of the uncertainty. Your ToM is never known better than your  
uncertainty (of course).

A long time ago I tried to write my own ToM finding algorithm and it  
failed miserably. Another method that has served me well is curve- 
fitting with polynomials or some other function.

Cheers,
M.


On Feb 17, 2009, at 1:14 PM, Michael Newberry wrote:

> In general, using the same algorithm in different software does not  
> assure that the result will be the same.