Re: Probleme RMS avec Alpy600
Posted: Fri Feb 17, 2017 9:42 pm
Robin and Etienne,
When pressing "Go" in calibration assistant (UV enabled as usual), I get nonsense RMS for setting these "Pixel size" values (like 16 or 30): 6.25, 6.3, 6.6.
Calculating the value by the formula from http://www.astrosurf.com/buil/isis/guid ... ration.htm I get this (ISIS-V5.7.0):
dx = 989 (h-alpha pixel X coord) - 505 (H-beta)= 484
the forumla of "p = 3123 / dx" giving me this: 6.4524793388429752066115702479339
Which is roundedly to 2 digits, it is 6.45, back from where I started.
Copy/pasting this value accurately with all digits doesn't improve anything my calibration (remains everything the same).
So there is no conclusion on my side.
But, never thought the ATIK 414 or Alpy may have different designs (wondering in what way).
Cheers,
Peter
When pressing "Go" in calibration assistant (UV enabled as usual), I get nonsense RMS for setting these "Pixel size" values (like 16 or 30): 6.25, 6.3, 6.6.
Calculating the value by the formula from http://www.astrosurf.com/buil/isis/guid ... ration.htm I get this (ISIS-V5.7.0):
dx = 989 (h-alpha pixel X coord) - 505 (H-beta)= 484
the forumla of "p = 3123 / dx" giving me this: 6.4524793388429752066115702479339
Which is roundedly to 2 digits, it is 6.45, back from where I started.
Copy/pasting this value accurately with all digits doesn't improve anything my calibration (remains everything the same).
So there is no conclusion on my side.
But, never thought the ATIK 414 or Alpy may have different designs (wondering in what way).
Cheers,
Peter