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\documentclass[10pt]{letter}
\usepackage{UPS_letterhead,xcolor,mhchem,ragged2e,hyperref}
\newcommand{\alert}[1]{\textcolor{red}{#1}}
\definecolor{darkgreen}{HTML}{009900}
\begin{document}
\begin{letter}%
{To the Editors of the Journal of Chemical Physics,}
\opening{Dear Editors,}
\justifying
Please find attached a revised version of the manuscript entitled
\begin{quote}
\textit{``Accurate full configuration interaction correlation energy estimates for five- and six-membered rings''}.
\end{quote}
We thank the reviewers for their constructive comments.
Our detailed responses to their comments can be found below.
For convenience, changes are highlighted in red in the revised version of the manuscript.
We look forward to hearing from you.
\closing{Sincerely, the authors.}
\newpage
%%% REVIEWER 1 %%%
\noindent \textbf{\large Authors' answer to Reviewer \#1}
{This paper reports on full configuration interaction (FCI) energy estimates for five- and six-membered ring molecules in dunning's cc-pVDZ basis set employing the CI using a perturbative selection made iteratively (CIPSI) algorithm.
The accuracies of standard single-reference methods including the perturbation (MP2, MP3, MP4, MP5) and coupled-cluster models (CCSD, CCSDT, CCSDTQ, CCSD(T), CC2, CC3, CC4, CCSD, CCSDT, CCSDTQ, CR-CC(2,3)) are further analyzed.
I think that the paper is providing important benchmarks, and is publishable in JCP.
I have a few comments in the following before publication.}
\\
\alert{We thank the reviewer for supporting publication of the present manuscript.
}
\begin{enumerate}
\item
{I suggest the authors to mention the accuracy of the CC hierarchy from the perturbational analysis, namely, the accuracy increase as MP2 $<$ CC2 $<$ MP3 $<$ CCSD $<$ MP4 $<$ CCSD(T) $<$ CC3 $<$ CCSDT $<$ MP5 $<$ CC4 $<$ CCSDTQ.
CR-CC(2,3) would be similar to CCSD(T) but I am not sure if it is a size-extensive model.}
\\
\alert{
}
\item
{It seems that the results of NO are more linear than those of OO in Fig 3. This contradicts the discussion in the right column of page 7.
}
\\
\alert{
}
\item
{It is claimed that the FCI estimates in Table III are likely accurate to less than 1mEh. I think this is too optimistic as some results in the table range by 1-2 mEh with different number of ftting points. I also think the extrapolation distances need to be listed for comparison to the error-bar.
}
\\
\alert{
}
\item
{Please add consideration to that the conclusion of the paper does not agree with the above-mentioned hierarchy, that is, MP5 is inferior to MP4, and CC3 outperforms CCSDT. I think this is not always the case, but depends on the system, choice of basis set, the error-bar of the FCI estimate, and so on.
}
\\
\alert{
}
\end{enumerate}
%%% REVIEWER 2 %%%
\noindent \textbf{\large Authors' answer to Reviewer \#2}
{In the present manuscript, Damour, V\'eril, Kossoki, Caffarel, Jacquemin, Scemama, and Loos present high-accuracy estimates of FCI energies for a series of five- and six-membered rings containing C, N, O, and S atoms, as calculated using either CIPSI (with optimized orbitals) or a selection of M{\o}ller-Plesset and coupled cluster methods. The study is carefully designed and rigorously executed (with a discussion of the orbital optimization technique, which is both adequate in length \& scope). My impression is thus overall positive, and the results nicely emphasize how (i) the use of energetically optimized orbitals is generally preferable and (ii) both the standard CC and the CC$n$ hierarchies converge satisfactorily for weakly correlated systems (unlike MP$n$). I will hence recommend publication as is. Congratulations to the authors on a thorough study.
}
\\
\alert{We thank Reviewer \#2 for these very positive comments.}
\end{letter}
\end{document}

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%ANU etterhead Yves
%version 1.0 12/06/08
%need to be improved
\RequirePackage{graphicx}
%%%%%%%%%%%%%%%%%%%%% DEFINE USER-SPECIFIC MACROS BELOW %%%%%%%%%%%%%%%%%%%%%
\def\Who {Pierre-Fran\c{c}ois Loos}
\def\What {Dr}
\def\Where {Universit\'e Paul Sabatier}
\def\Address {Laboratoire de Chimie et Physique Quantiques}
\def\CityZip {Toulouse, France}
\def\Email {loos@irsamc.ups-tlse.fr}
\def\TEL {+33 5 61 55 73 39}
\def\URL {} % NOTE: use $\sim$ for tilde
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% MARGINS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\textwidth 6in
\textheight 9.25in
\oddsidemargin 0.25in
\evensidemargin 0.25in
\topmargin -1.50in
\longindentation 0.50\textwidth
\parindent 5ex
%%%%%%%%%%%%%%%%%%%%%%%%%%% ADDRESS MACRO BELOW %%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\address{
\includegraphics[height=0.7in]{CNRS_logo.pdf} \hspace*{\fill}\includegraphics[height=0.7in]{UPS_logo.pdf}
\\
\hrulefill
\\
{\small \What~\Who\hspace*{\fill} Telephone:\ \TEL
\\
\Where\hspace*{\fill} Email:\ \Email
\\
\Address\hspace*{\fill}
\\
\CityZip\hspace*{\fill} \URL}
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%% OTHER MACROS BELOW %%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\signature{\What~\Who}
\def\opening#1{\ifx\@empty\fromaddress
\thispagestyle{firstpage}
\hspace*{\longindendation}\today\par
\else \thispagestyle{empty}
{\centering\fromaddress \vspace{5\parskip} \\
\today\hspace*{\fill}\par}
\fi
\vspace{3\parskip}
{\raggedright \toname \\ \toaddress \par}\vspace{3\parskip}
\noindent #1\par\raggedright\parindent 5ex\par
}
%I do not know what does the macro below
%\long\def\closing#1{\par\nobreak\vspace{\parskip}
%\stopbreaks
%\noindent
%\ifx\@empty\fromaddress\else
%\hspace*{\longindentation}\fi
%\parbox{\indentedwidth}{\raggedright
%\ignorespaces #1\vskip .65in
%\ifx\@empty\fromsig
%\else \fromsig \fi\strut}
%\vspace*{\fill}
% \par}

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