irs1_flat_lrx.fits

display range: -3500,3500 Fit and subtract the background along y-axis This image means nothing

imdel tmp1
imarith irs1_flat_lra / irs1_cont_lra tmp1
fit1d tmp1 tmp1 difference axis=2 inter- function=spline3 order=10 high_reject=3 low_reject=3 niterate=10 grow=0
imarith tmp1 * irs1_cont_lra irs1_flat_lrx.fits
### If the cont image is not good, use this line instead of above three lines.
#fit1d irs1_flat_lra irs1_flat_lrx.fits difference axis=2 inter- function=spline3 order=10 high_reject=3 low_reject=3 niterate=10 grow=0
displ irs1_flat_lrx 9 zs+