UVUAstronomyResearch2017

Today I worked on producing a waterband depth graph, which turned out to be more complex than I first thought, especially when propagating the error through to the end. I have left an example of one of the waterband depth plots at the bottom of this post. I've also been working on graphing the variables separately for the curve_fit function, which I did successfully. Interestingly enough, each sin cosine pair came out smooth. However, when fit for the function as a whole, the graph comes out bumpy. I also asked the internet about any ideas of what it could be, and I got the answer that it was an expected behavior of the curve_fit function. I've also included pictures below.

Today I've been working on several different items. First I have figured out why the flux percentage was failing. I was summing the edges of the data and that for whatever reason was causing the whole flux to drop significantly. By only summing the flux from 10600 to 17000 I found that it greatly stabilized the result and I got exactly what I was expected to get. I added to the upper left when less than a percent changes. It is pictured below. Interestingly enough, I found that the extraction width is fairly close to the optimal noise for the waterband. This can show that using the noise in the waterband as a guide to choosing an extraction width agrees with using the amount of total flux captured.

These are several different fits, each one gaining another pair of variables in the fourier transformation. The fit is about the same from 4 parameters on and actually gets worse when getting to large numbers of parameters. I've also included the chi value and the BIC value on every single graph. The BIC value as of right now increases fairly linearly as I add more parameters. Here are some additional graphs I've been working on that have been fit with a fourier fit of 4 different terms 2MASS-J16291840+0335371 SDSS-J075840.33+324723.4

SDSS-J075840.33+324723.4 2MASS-J16291840+0335371 (first set of exposures) 2MASS-J16291840+0335371 (second set of exposures)