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# System prepended metadata

title: SED comparision of WLQ and Quasar

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# SED comparision of WLQ and Quasar
our aim is to compare the SED of weak emission line quasars and normal quasars. 
## Approach
* Our sample of WLQ derived from the list of 86 radio-quiet wlq published in plotkin 2010 and 46 wlq from the Meussinger 2014 (MB14) . 
* We FUrther checked for the wise data availability, proper motion within 2.5 $\sigma$,radio loudness parameter,optical crowded region,and spectrum like galaxies. 
* THese check reduces our wlq sample to 77 wlq.
* Futrther 8 out of 77 sources do not follow the control sample criterion i.e. $\delta R_{mag} \sim0.6$ and $\delta z \sim0.01$. 
*  Our fina wlq sample contain 69 source. 
*  Create Control Sample 2 (z tolerance 0.01, $r_{mag}$ tolerance 0.6)using SDSS. 

## Results
* After creating the control sample of normal qso corresponding to each wlq. We made comparision of the magnitude as we as flux density of the each wlq with the median value of the qso control sampe corresponding to each wlq.
* Data points are mating in the optical but we found a difference in the IR region. 
* Our comparision shows that the wlq and normal qso are matching in optical but IR contribution in wlq is small as comparision to normal qso for most of the wlq source.
* Such difficiency in the IR region motivates us to make comparision between the sed of WLQ and the normla Quasar. In order to compare the parameters associated with the IR rigion.

## SED tool
We have used the AGNfitter in order to compare the SED of our wlq and the norma quasars.
**AGNfitter** mainly disentagle the contribution from the AGN which contains the contribusion from the accretion disk (BBB),Torus bump,host galaxy and the SFR regions.