Embedded Files
hfs_synt is an auxiliary procedure to create a synthetic spectrum, with the option of adding Gaussian noise. You can select the transition, number of channels, spectral resolution, line parameters, and noise level.
It is a menu-driven program, and uses the PGplot Graphics Subroutine Library to display the synthetic spectrum. Example of a hfs_synt run:
$ hfs_synt _______________________________________________________ HfS_synt. Synthesis of spectra with hyperfine structure Robert Estalella, 2016/03 _______________________________________________________ Date: 2017/05/09 Time: 13:00:25 HfS synt menu_______________________________________ 0. Quit 1. Select transition: NH3(1,1) 2. Change nchan= 128 3. Change dvchan= 0.5000 4. Change refchan= 64.0000 5. Change Delta_V= 1.0000 6. Change V_lsr= 0.0000 7. Change A*tau_m= 1.0000 8. Change tau_m= 1.0000 9. Change noise rms= 0.0000 Choose option (0-8):Output
Output
hfs_synt.synt, an ASCII file with the synthetic spectrum generated. The file has a header (lines beginning with "!" with the values of the parameters used for generating the synthetic spectrum.hfs synt.eps, plot of the synthetic spectrum.
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