johnb Posted September 22, 2013 Share Posted September 22, 2013 Hithe attached has been calibrated however if I have 4861 at the right point why do none of the others line up ?John B Link to comment Share on other sites More sharing options...
johnb Posted September 22, 2013 Author Share Posted September 22, 2013 and the answer is calibrating on the line post the centre lines everything up nicelyJohn B Link to comment Share on other sites More sharing options...
jnp Posted September 26, 2013 Share Posted September 26, 2013 Yes, it looks like you mistook the Hydrogen Gamma as Hydrogen Beta when calibrating.The drop off at 7800 looks unusual, are you using a IR filter? Link to comment Share on other sites More sharing options...
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