p61743098
/
sagecal
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

spectra correction

This commit is contained in:
Sarod Yatawatta 2015-03-04 10:53:26 +01:00
parent 0ef03ca1a0
commit ce633cd499
1 changed files with 11 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
README
View File

@ -52,13 +52,20 @@ S3C61MD 2 22 49.796414 86 18 55.913266 0.135 0 0 0 -6.6 0 1 1 0.0 115000000.0
Note: Comments starting with a '#' are allowed for both sky model and cluster files.
Note: 3rd order spectral indices are also supported, use -F 1 option in sagecal.
Note: Spectral indices use natural logarithm, exp(ln(I0) + sp0*(f/f0) + sp1*(f/f0)^2 + ..) so if you have a model with common logarithms like 10^(log10(II0) + spp0*(f/f0) + spp1*(f/f0)^2 + ..) then, conversion is
Note: Spectral indices use natural logarithm, exp(ln(I0) + p1*ln(f/f0) + p2*ln(f/f0)^2 + ..) so if you have a model with common logarithms like 10^(log(J0) + q1*log(f/f0) + q2*log(f/f0)^2 + ..) then, conversion is
I0=exp(ln(10)*log10(II0))
sp0=spp0*ln(10)
sp1=spp1*ln(10)
ln(I0)+p1*ln(f/f0)+p2*ln(f/f0)^2+... = ln(10)*(log(J0)+q1*log(f/f0)+q2*log(f/f0))^2)+...)
=ln(10)*(ln(J0)/ln(10)+q1*ln(f/f0)/ln(10)+q2*ln(f/f0)^2/ln(10)^2+...)
so
I0=J0
p1=q1
p2=q2/ln(10)
p3=q3/ln(10)^2
...
#######################################################################
3)Run sagecal
Optionally: Make sure your machine has (1/2 working NVIDIA GPU cards or Intel Xeon Phi MICs) to use sagecal.