calibration in ISIS

Forums Spectroscopy New observations (1) calibration in ISIS

Kevin Gurney

Hi Robin

I reworked this one in ISIS and used their autocalibration for the Alpy.. the errors on the Balmer lines were an order of magnitude smaller (~0.23A for first 4 Balmer lines starting at Ha – it gets worse at blue end..)

Incidentally, I managed this only after reading the the thread in

The nominal value of the Atik460 pixel size (4.54) is too big for me.. it works best with 4.45 (I wonder if there is a typo in their literature – swapping 4 and 5!?)