\begin{table} %t1 
\caption{The log of the ISO observations of Mkn~297.  The
nine columns list the TDT number (a unique identifier for an ISO
observation), the AOT number (which identifies the observing mode
used), the filter label, the wavelength range ($\Delta\lambda$),
the reference wavelength of the filter where appropriate, the duration of 
the measurement (including both the on- and off-source measurements), the 
field-of-view of the instrument in the configuration employed, the positional 
offset of the background measurement(s) with respect to the target reference 
position, and any additional notes.} 
\label{t1}
%\begin{center}
\par
\begin{tabular}{cclcccccl}\hline \hline
\noalign{\smallskip}
TDT\#$^{a}$ & AOT\# & Filter  & $\Delta\lambda$  &  $\lambda_{\rm ref}$ & $\Delta$t & FOV                            & \ Chop                & Notes         \\
          &         &         & ($\mu$m)         & ($\mu$m)                &  (s)   & \ $^{\prime\prime}$               & \ \ $^{\prime\prime}$ &               \\
          &         &         &                  &                         &           &                                   &                       &               \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
47400671  &  CAM03  &    LW2  &     5.0--8.5     &             6.7         &    588    &   48 (1.5$^{\prime\prime}$/pixel) &     90                & chop in Dec \\
47400671  &  CAM03  &    LW6  &     7.0--8.5     &             7.7         &    588    &   48                              &     90                & chop in Dec \\
47400671  &  CAM03  &    LW3  &    12.0--18.0    &            14.3         &    588    &   48                              &     90                & chop in Dec \\
47400671  &  CAM03  &    LW10 &     8.0--15.0    &            12.0         &    588    &   48                              &     90                & chop in Dec \\
09101068  &  CAM01  &    LW3  &    12.0--18.0    &            14.3         &   3794    &  480 (6$^{\prime\prime}$/pixel)   &                       & raster$^{b}$  \\
47400567  &  PHT40  &   SS/SL &     2.5--11.6    &                         &   1024    &   25                              &  +/$-$150               & triang. chop$^{c}$ \\
62702069  &  LWS01  &         &    43.0--190.0   &                         &   1124    &  101                              &                       & on-source     \\
62702070  &  LWS01  &         &    43.0--190.0   &                         &   1124    &  101                              & see below$^{a}$       & off-source    \\
\hline\end{tabular}
%\end{center}
\par
{ $^a$ All observations refer to target position R.A. 16$^{\rm h}$ 05$^{\rm m}$ 13.2$^{\rm s}$ and Dec +20$^{\circ}$ 32$'$ 32.0$''$ } \\ 
{  except for the LWS background measurement made at 16$^{\rm h}$ 05$^{\rm m}$ 57.2$^{\rm s}$ +20$^{\circ}$ 26$'$ 23.7$''$. }     \\ 
{  $^b$ TDT 09101068 was a $4 \times 4$ raster with 96$^{\prime\prime}$ step size. }               \\ 
{  $^c$ The term "chop'' has been used to refer to all off-target measurements, although only PHT } \\ 
{  employed a chopping device. For the other instruments the spacecraft pointing was offset.}  
\end{table}