\begin{table}%t2
\caption{\label{table:ss2_xray}X-ray observations of SS2 in Bol 194.}
\small
%\centerline
{
\begin{tabular}{lrrrrrr}\hline\hline \noalign{\smallskip}
	Telescope/Instrument$^a$ & ObsID & Exp. time$^b$ & Date$^c$ & Offset$^d$ & Count Rate$^e$ & Luminosity$^e$\\ 
	 & & [ks] & [UT] & [d] & [ct s$^{-1}]$ & [erg s$^{-1}$]\\ \hline \noalign{\smallskip}
	\xmm EPIC PN & 0505760201 & 49.2 & 2007-07-22.55 & 0 & $<$2.9 \tpower{-3} &  $<$1.6 \tpower{36}\\
	\chandra ACIS-S &  8186 & 5.0 & 2007-11-03.18 & 104 & 2.1 \tpower{-2} &  3.4 \tpower{37}\\
	\chandra HRC-I & 8526 & 18.7 & 2007-11-07.64 & 108 & (3.55 $\pm$ 0.25) \tpower{-2} &  (8.41 $\pm$ 0.59) \tpower{37}\\
	\chandra HRC-I & 8527 & 20.0 & 2007-11-18.76 & 118 & (2.95 $\pm$ 0.25) \tpower{-2} &  (7.00 $\pm$ 0.60) \tpower{37}\\
	\swift XRT & 00031027001 & 7.3 & 2007-11-24.34 & 125 & (8.0 $\pm$ 1.2) \tpower{-3} & (6.35 $\pm$ 1.04) \tpower{37}\\
	\chandra ACIS-S & 8187 & 5.0 & 2007-11-27.16 & 128 & $<$6 \tpower{-4} &  $<$9.7 \tpower{35} \\
	\swift XRT & 00031027002/3 & 4.7 & 2007-12-02.64 & 133 & (3.2 $\pm$ 1.0) \tpower{-3} & (3.92 $\pm$ 1.22) \tpower{37}\\
	\swift XRT & 00031027004 & 3.9 & 2007-12-16.77 & 147 & $<$3.2 \tpower{-3} &   $<$3.9 \tpower{37}\\
	\swift XRT & 00031027005 & 4.0 & 2007-12-30.02 & 160 & $<$2.0 \tpower{-3} &   $<$2.4 \tpower{37}\\
	\xmm EPIC PN & 0511380201 & 22.8 & 2008-01-05.99 & 167 & $<$5.1 \tpower{-3} & $<$3.5 \tpower{36}\\ 
\hline
\end{tabular}}
\par
\medskip
Notes:\hspace{0.3cm} $^a$ Telescope and instrument used for observation. ACIS-S count rates are from \citet{2007ATel.1328....1G}.\\
\hspace*{1.1cm} $^b $ Dead time corrected exposure time of the observation.\\
\hspace*{1.1cm} $^c$ Start date of the observation.\\
\hspace*{1.1cm} $^d $ Time in days after the last X-ray non-detection of SS2 on 2007 July 22.55 (JD = 2454304).\\
\hspace*{1.1cm} $^e $ Source count rates, X-ray luminosities (unabsorbed, blackbody fit, 0.2--1.0 keV) and upper limits were estimated\\
\hspace*{1.5cm}according to Sect.~\ref{sect:sss_bol194}. 
\end{table}