This page (revision-10) was last changed on 07-Dec-2016 14:14 by PeterYoung

This page was created on 05-Feb-2008 17:25 by Gardini

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Version Date Modified Size Author Changes ... Change note
10 07-Dec-2016 14:14 1 KB PeterYoung to previous
9 20-May-2008 16:25 1 KB Gardini to previous | to last
8 20-May-2008 16:24 1 KB Gardini to previous | to last
7 20-May-2008 16:22 1 KB Gardini to previous | to last
6 20-May-2008 16:18 1 KB Gardini to previous | to last
5 23-Apr-2008 10:43 1 KB Gardini to previous | to last
4 05-Feb-2008 17:45 1 KB Gardini to previous | to last
3 05-Feb-2008 17:27 1 KB Gardini to previous | to last
2 05-Feb-2008 17:26 1 KB Gardini to previous | to last
1 05-Feb-2008 17:25 1 KB Gardini to last

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EvaluationOfErrorsInEis_prep
EvaluationOfErrorsInEis_prep

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At line 1 added 2 lines
[{ALLOW edit EISMainUsers}]
[{ALLOW view Anonymous}]
At line 19 changed 2 lines
Actually, p is almost proportional to d, with a slight dependence on the
wavelength: that is p = f(d) = K*d, with K almost constant.
Actually, p is proportional to d * lambda: that is p = K1*d*lambda,
where K1 is a constant. Henceforth inside a given window, p is almost
proportional to d: p=f(d)=K*d, where K=K1*lambda is almost constant.
At line 25 changed one line
where 2.5 is the value of the read out noise. It follows then that
where 2.5 DN is the value of the read out noise. It follows then that
At line 27 changed one line
err(p) = sqrt(p+[f(2.5)]^2) = sqrt(K*d+(K*2.5)^2)
err(p) = sqrt(p+f(2.5)^2) = sqrt(K*d+(K*2.5)^2)
At line 32 changed one line
err(I)/I = err(p)/p = sqrt(f(d)+[f(2.5)]^2)/f(d)
err(I)/I = err(p)/p = sqrt(f(d)+f(2.5)^2)/f(d)
At line 34 changed one line
which differs from the previous err(d)/d by about a factor 1/sqrt(K) if d>>2.5.
which differs from the previous err(d)/d by about a factor 1/sqrt(K) if d is greater than 2.5 DN.
At line 42 added 10 lines
Alessandro Gardini
----
! Update
The read noise error now used by eis_prep ranges from 2.24 to 2.37 DN for the four CCD quadrants. These values replace the 2.5 DN value mentioned above.
[Peter Young|file:///Users/pyoung/public_html/index.html], 19-Dec-2008
This page (revision-10) was last changed on 07-Dec-2016 14:14 by PeterYoungTop