ajclarke
Jan26-11, 08:14 AM
Hey PF Folkadins =]
DO any of you have an experience with IRAF? I'm currently doing a BSc project on analysing spectral changes during periods of flaring on dMe type stars and im having some issues extracting my ccd spectra.
In IRAF, I have run apall. And followed the steps of defining an aperature (there is a small issue with the spectrum being slanted, though IRAF seems to have the capabilities to handle this)
However apall seems to be plotting a spectra rather than a pixel count per y direction ,as you would want for analysing which section of the ccd holds the image of the star.
Simply put the x and y axis are the wrong way around for the apall to work correctly, though why they have spectral dispersion defaulting to y and spacial dispersion to x is beyond me, since virtually all ccd's I have are the other way around.
Any clues on simple ways I can change this to the other way around? Without loading all 200 CCD frames into IDL and then back again?
Cheers.
Adam
DO any of you have an experience with IRAF? I'm currently doing a BSc project on analysing spectral changes during periods of flaring on dMe type stars and im having some issues extracting my ccd spectra.
In IRAF, I have run apall. And followed the steps of defining an aperature (there is a small issue with the spectrum being slanted, though IRAF seems to have the capabilities to handle this)
However apall seems to be plotting a spectra rather than a pixel count per y direction ,as you would want for analysing which section of the ccd holds the image of the star.
Simply put the x and y axis are the wrong way around for the apall to work correctly, though why they have spectral dispersion defaulting to y and spacial dispersion to x is beyond me, since virtually all ccd's I have are the other way around.
Any clues on simple ways I can change this to the other way around? Without loading all 200 CCD frames into IDL and then back again?
Cheers.
Adam