I suspect these are the zero orders, dispersed into small spectra by the 15 deg prism that was used with the 300 l/mm grating to make the "GRISM"Hamish Barker wrote:
What causes the tiny little spectra in the centre of the image?
Cheers
Robin
I suspect these are the zero orders, dispersed into small spectra by the 15 deg prism that was used with the 300 l/mm grating to make the "GRISM"Hamish Barker wrote:
What causes the tiny little spectra in the centre of the image?
The September 2019 edition of ESO "The messenger" covered this eventRobin Leadbeater wrote:Really ? ! That must have been a scary time for the telescope operator. I expect someone at the top had to sign for thatChristian Buil wrote:
(note the NTT at the first place, pointing the sun).