7. Example 4 - Nod-and-Shuffle Correct for Extra Order

In this example we will reduce a GMOS longslit nod-and-shuffle observation of a high redshift quasar. The particularity here is that the setting is quite red and the second order shows up in the spectrum. The configuration uses the OG515 blocking filter and the second order light appears at 1030nm. We will show how to recognize the effect and then how to not include the light from that extra order using the interactive tools.