› Forums › Spectroscopy › Unable to calibrate a spectrum in ISIS › shift of X position
5 October 2018 at 11:08 am
#580056
![](https://britastro.org/wp-content/uploads/2016/11/picture-146-1478110706-80x80.jpg)
Participant
I agree. I found it by looking at the position of the lines in the geometric corrected spectrum image. (This could be a work round by running the calibration a second time applying the offset seen in the image ) I am awaiting feedback from Christian
Robin