Data Reduction Frequently Asked Questions

In order to observe the range 4100-6800 A with GRIS_600B+22 (no order sorting filter) with the 1 arcsec slit, we have shifted the slit itself by 800 pixels to the left (x-800), but now a bright feature appears in the spectrum. What is it?

The bright feature is likely to be the spectral 0thorder.