deletions | additions       diff --git a/subsection_Comparison_with_X_ray__.tex b/subsection_Comparison_with_X_ray__.tex  index 4a3b08f..7bcc658 100644  --- a/subsection_Comparison_with_X_ray__.tex  +++ b/subsection_Comparison_with_X_ray__.tex 
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\subsection{Comparison with X-ray-selected AGN pairs}  Both our study (Liu et at 2011) and Koss et el use imaging spectroscopy to select data points for dual (pair) AGN samples. A small pair separation is also present in both studies with most of the Lui AGN detections at separation less than 100 kick, and those of Koss at found at separations less than 30 kpc. Both papers note that the luminosities of AGN pairs increase with a decrease in separation between galaxies (in a pair), suggesting that mergers promote AGN activity. (Liu et al 2011, Koss et al). Both papers also acknowledge the limitations experienced in selecting the appropriate sample data due to SDSS’ fixed fibre size. On this point, Koss notes that due to SDSS fibre being 3”, it is sensitive to smaller physical scales.  keep it to Koss et al. (2011); primary results which are nicely summarized in conclusions. with a bit of explanation.   Focus on Koss first. May ##May  include Ellison et al. (2015) later, but not a priority.