deletions | additions       diff --git a/sectionObservational.tex b/sectionObservational.tex  index fa326f7..19b420c 100644  --- a/sectionObservational.tex  +++ b/sectionObservational.tex 
...
\section{Observational Dataset:}  \label{sec:data}   The galaxy clusters selected to this work, were extracted from the catalogue of 200 objects serendipitously detected in the ROSAT PSPC Pointed Observations (Vikhlinin et al. 1998) and the revised version by Mullis et al. (2003). The original catalogue contain galaxy clusters with X-ray lumiosities in the 0.5–2.0 keV energy band (observer frame), ranging from 10$^{42}$ to $\sim$ 50 $\times$ 10$^{43}$ erg s$^{−1}$ in the redshift range 0.16 to 0.70. We From these catalogues, we  define a sample consist in seven galaxy clusters, with intermediate X-ray luminosity (LX ∼ 0.5–45 × 1043 erg s−1), in he the  redshift rango of 0.164 to 0.701. (for  further The clusters were observed in the Gemini NOrth and South Telescopes, using the Gemini Multi-Object Spectrograph (Hook et al. 2004, hereafter GMOS) in the image mode, the g$\prime$, r$\prime$ and i$\prime$ filters. Further  details see Paper I, about the observing strategy can be found in Nilo Castellón et al. (2014),  \citep{}). The galaxy photometric properties of our clusters sample were obtained with  Gemini North and South telescopes using the Multi-Object Spectrograph (Hook et al.