[Frost] About Normalization

[Michael Dugger]

Correction:
Should have written "number of incident photons" instead of "incident 
photon flux".

-Michael

On Wed, 25 May 2011, Michael Dugger wrote:

>
> Sung,
>
> It might be easiest to use a relative normalization. You can count the
> number of events per energy bin in the CH2 target and assume that the
> incident photon flux scales with the number of CH2 events. This should
> give you a very good relative normalization for circular beam data. For
> linear beam, you need to account for the phi asymmetry, but that is not
> difficult to do.
>
> -Michael
>
> On Wed, 25 May 2011, Sungkyun Park wrote:
>
>> Hi Eugene and Steffen,
>>
>> Now I try to get the asymmetry plot for observable I^{circle} in FROST data to compare it with the data published by Steffen.
>> For this, I need to make the unpolarized target data from the FROST data.
>> I know each run has the target polarization with the same direction but their values are different.
>> To make unpolarized target data, I will divide each target polarization value.
>> Before doing that, I need to consider the normalization because each run has different number of events.
>>
>> I make three picture in the following.
>>  http://hadron.physics.fsu.edu/~skpark/research/research_may2511.html
>> I will call picture-1 on the top left, picture-2 on the top right, and picture-3 on the bottom-left.
>> I made these using gflux056200_erg2.aXX.dat in our gflux.
>>
>> Q1) what do I use as the normalization factor in each photon energy bins?
>>
>> picture-1 is about number of photons in each photon energy bin.
>> picture-2 is about (number of photons)X(photon energy) in each photon energy bin.
>>
>> it I am on the wrong way, I really want to know how I get the normalization factor from gflux file.
>>
>> Sung
>> Florida State University
>>
>>
>>
>>
>> Florida State University
>>
> _______________________________________________
> Frost mailing list
> Frost at jlab.org
> https://mailman.jlab.org/mailman/listinfo/frost
>