*** 2d Fourier Transform of the Sunyaev-Zel'dovich Effect -Komatsu&Seljak- ***
December 11, 2010: E.Komatsu

Here we provide a program for computing a 2d Fourier transform of 
the Sunyaev-Zel'dovich (SZ) effect profile, Tsz(x), using the Komatsu-Seljak profile.

Ref: Komatsu & Seljak, MNRAS, 327, 1353 (2001); MNRAS, 336, 1256 (2002)
     Komatsu et al., arXiv:1001.4538, Appendix D2 and Fig.17

The trasnformation is done via [see Eq.(2) of Komatsu&Seljak (2002)]

trasnform=(fourpi*rs)/ls^2*int_{xin}^{xout}[x^2*Tsz(x)*sin(l*x/ls)/(l*x/ls)]dx

- To compile and use the program, edit Makefile and simply "./make"
- It will generate executables called "compute_transform_ks"
- Running compute_transform_ks will generate the data file called 
"x_transform.txt", which contains:

1st: x 
2nd: 2d Fourier transform of Tsz(x) in units of micro Kelvin [Rayleigh-Jeans], 
     where x=l/ls [ls=da/rs]