MOVE N1 N2 File WHICH ADD -- Alters wavelength scales to give a
velocity, wavelength or pixel shift.
Parameters:
N1, N2 -- Range of spectra to treat
File -- File of velocities (single column, one per spectrum)
km/s. These are removed. If a file is not found, the
program will try to translate the string given as
a shift, if this fails it gives up.
WHICH -- Type of shift V(elocity), W(avelength) or P(ixel)
ADD -- 'A' to add the shift, 'S' to subtract.
If WHICH=V, then ADD='A' causes the spectrum's velocity
to be increased (i.e. shifted to red)
If WHICH=W, then ADD='A' causes the spectrum's
wavelengths to be increased (i.e. shifted to red)
If WHICH=P, then ADD='A' causes the spectrum to be
shifted to the right.
(in each case for a positive value from the file)
NB MOVE does **nothing** to the spectra, it just modifies the wavelength
scales appropriately. If you want to average the results together with the
correct shifts, you should first rebin the results and then average them.
Note that it is not straightforward to shift a logarithmic scale by a
constant wavelength increment and so MOVE does not attempt to do so.
In such a case you should rebin to a normal wavelength scale first.
See also related command SINE
This command belongs to the classes: binary , time_series , manipulation