Quote:
Originally Posted by sheeny
Clear sky tonight Ken so I made a point of getting out there and getting a spectrum or 2. 
This was my first real go with a new arrangement:
C11, SA100 Grism (EO 2° wedge), 0.5FR and ST8i camera.
I captured a spectrum of GamCru first so I could extract a camera response curve, and then took one of EtaCar. I got a bit of a tadpole tale to the star image but I captured the spectra anyway, then afterwards removed the SA and ST8i to check collimation which all looked pretty good... I need to track that down... 
What I need help with though is handling the fits files in VSpec.
My old procedure was I captured on the DMK, processed in R5 and saved as a fits. Opened it in IRIS and subtract sky background and save again, then open that in VSpec and all is hunky dory.
With the ST8i I saved directly as a fits file, opened in IRIS to subtract the sky background and saved again, but VSpec will not open the files... it says the file format is not correct.  So I tried opening the fits file in R5 just to save it, then IRIS, then VSpec but R5 introduces a heap of noise, though VSpec will open it.
Is there something I'm missing?
Al. |
If you save the file in Iris as a .pic file then VSpec is happy to open it.