2 Observations and photometry

All the galaxies were observed on February 4-7, 1995 at the 2.56-meter Nordic telescope (La Palma). A CCD camera with a TEC 1k $\times$ 1k chip provided a field of view of 3 $\times$ 3 arcmin with a resolution of 0 $\hbox{$.\!\!^{\prime\prime}$}$ 176 per pixel. The exposure times in filters of the B, V, I Johnson-Cousins system as well as the seeing (FWHM) and the air masses are presented in Table 1. The CCD frames were debiased, flat-fielded and calibrated by the equatorial standards from Landolt (1992). Stellar photometry was carried out with the DAOPHOT package (Stetson 1987). For the analysis we selected, as a rule, starlike objects with standard photometric errors $\sigma (V)\leq 0.2$ mag and image parameters $\mid$ SHARP $\mid\leq$ 2.5.

**Table 1:** Observation log
$\begin{tabular} {\vert cccccc\vert} \hline Name & Date & Filter &Exposure & FWH... ...e & 500 & 0.8 & 1.13 \\ & & $V$\space & 500 & 0.8 & 1.13 \\ \hline\end{tabular}$

The CCD frames for the 20 observed galaxies in the B, V or I filters are presented in Figs. 1-20. Our stellar photometry results are given in Tables 2-17, which are accessible from the CDS via ftp. Besides the detailed photometry of starlike objects, we made a surface photometry of the galaxies in concentric circular apertures, measuring their total apparent magnitudes, $V\rm _T$ , and integral colour indices, $(B-V)\rm _T$ or $(V-I)\rm _T$ . These data are listed in Table 18.

$\begin{figure} \includegraphics [height=10.5cm]{ds1565f1.ps}\end{figure}$

Figure 1: The V frame of UGC 685. As for all other images, North is top, and East is left. The upper right corner corresponds to X = 0, Y = 0 of the frame coordinates given in the tables; X grows to East and Y to South

$\begin{figure} \includegraphics [height=10.5cm]{ds1565f2.ps}\end{figure}$

Figure 2: The V frame of UGC 1281

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Figure 3: The V frame of UGC 3303

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Figure 4: The I frame of UGC 3476

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Figure 5: The V frame of UGC 3600

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Figure 6: The V frame of UGC 3698

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Figure 7: The V frame of NGC 2337

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Figure 8: The V frame of UGC 3817

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Figure 9: The V frame of UGC 3860

$\begin{figure} \includegraphics [height=10.5cm]{ds1565f10.ps}\end{figure}$

Figure 10: The V frame of UGC 4426

$\begin{figure} \includegraphics [height=10.5cm]{ds1565f11.ps}\end{figure}$

Figure 11: The V frame of F 565-v1

$\begin{figure} \includegraphics [height=10.5cm]{ds1565f12.ps}\end{figure}$

Figure 12: The V frame of UGC 5086

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Figure 13: The V frame of UGC 5272

$\begin{figure} \includegraphics [height=10.5cm]{ds1565f14.ps}\end{figure}$

Figure 14: The V frame of UGC 5340

$\begin{figure} \includegraphics [height=10.5cm]{ds1565f15.ps}\end{figure}$

Figure 15: The B frame of UGC 5427

$\begin{figure} \includegraphics [height=10.5cm]{ds1565f16.ps}\end{figure}$

Figure 16: The V frame of UGC 5456

$\begin{figure} \includegraphics [height=10.5cm]{ds1565f17.ps}\end{figure}$

Figure 17: The V frame of NGC 3274

$\begin{figure} \includegraphics [height=10.5cm]{ds1565f18.ps}\end{figure}$

Figure 18: The V frame of UGC 5889

$\begin{figure} \includegraphics [height=10.5cm]{ds1565f19.ps}\end{figure}$

Figure 19: The B frame of NGC 5238

$\begin{figure} \includegraphics [height=10.5cm]{ds1565f20.ps}\end{figure}$

Figure 20: The B frame of UGC 9405

Up: CCD imaging of twenty galaxies