All Figures

$\begin{figure} \par {\includegraphics[angle=0,width=10.5cm,clip]{ms3809f1.ps} }\end{figure}$ Figure 1: Extracted images of monochromatic CCD frames in the optical and NIR continuum a) K-band image with stars labelled. b) $\lambda$ 2.13 $\mu$ m, the red star is indicated by an arrow. c) $\lambda$ 5300 Å, the two components of N88 are labelled A and B. d) The H₂ emitting region with its main N-S filament and peak of intensity, is indicated by an arrow. The size of each field corresponds to $52\hbox {$^{\prime \prime }$ }\times 51\hbox {$^{\prime \prime }$ }$ or $\sim$ $15.8 \times 15.5$ pc.
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In the text

$\begin{figure} \par {\includegraphics[angle=-90,width=8.5cm,clip]{ms3809f2.ps} }\end{figure}$ Figure 2: Brightness distribution of the 5300 Å (dashed line) and NIR continuum (solid line) images along the direction A-B.
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In the text

$\begin{figure} \par {\includegraphics[angle=-90,width=8.8cm,clip]{ms3809f3.ps} }\end{figure}$ Figure 3: E-W rectified composite spectra of the ionizing source embedded in the core N88A, in a 4450-4750 $\AA$ wavelength range obtained in 1991 (grey line) and 1988 (black line). The spectrum of the component B is also presented (dotted line). The continuum level is normalized to unity.
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In the text

$\begin{figure} \par {\includegraphics[angle=-90,width=17.6cm,clip]{ms3809f4.ps} }\end{figure}$ Figure 4: E-W matched red and blue CCD spectra obtained in 1997 (long exposures) through an $4\hbox {$^{\prime \prime }$ }\times 4\hbox {$^{\prime \prime }$ }$ aperture. The intensity is in units of 10^-16 ergs cm^-2 Å^-1.
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In the text

$\begin{figure} \par {\includegraphics[angle=-90,width=8.5cm,clip]{ms3809f2.ps} }\end{figure}$	Figure 2: Brightness distribution of the 5300 Å (dashed line) and NIR continuum (solid line) images along the direction A-B.
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$\begin{figure} \par {\includegraphics[angle=-90,width=8.8cm,clip]{ms3809f3.ps} }\end{figure}$	Figure 3: E-W rectified composite spectra of the ionizing source embedded in the core N88A, in a 4450-4750 $\AA$ wavelength range obtained in 1991 (grey line) and 1988 (black line). The spectrum of the component B is also presented (dotted line). The continuum level is normalized to unity.
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$\begin{figure} \par {\includegraphics[angle=-90,width=17.6cm,clip]{ms3809f4.ps} }\end{figure}$	Figure 4: E-W matched red and blue CCD spectra obtained in 1997 (long exposures) through an $4\hbox {$^{\prime \prime }$ }\times 4\hbox {$^{\prime \prime }$ }$ aperture. The intensity is in units of 10^-16 ergs cm^-2 Å^-1.
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