Abstract. The Pulkovo spectrophotometric catalog was published in Baltic Astronomy Vol.5 No.4 (1996). Here we present a supplement of the catalog containing the flux distribution data for 77 stars in the wavelength range from 320 nm to 735 nm. Actually, this is a direct continuation of Table 6 of the catalog.

Abstract.A spectrophotometric catalog is presented, combining results of numerous observations made by Pulkovo astronomers at different observing sites. The catalog consists of three parts: the first contains the data for 602 stars in the spectral range of 320-735 nm with a resolution of 5 nm, the second one contains 285 stars in the spectral range of 500-1080 nm with a resolution of 10 nm and the third one contains 278 stars combined from the preceding catalogs in the spectral range of 320-1080 nm with a resolution of 10 nm. The data are presented in absolute energy units W/m 2 m, with a step of 2.5 nm and with an accuracy not lower than 1.5-2.0 %.

Data from the Pulkovo spectrophotometric data base on the absolute quasimonochromatic fluxes from oCet in the 320-1080 nm range are used to determine the physical parameters of this star in different phases of its light curve. The continuum emission layer is found to expand between the phases of the cycle corresponding to the rising and falling branches of the light curve. The average expansion velocity is 32 km/s. By the time the star's brightness has fallen by roughly three magnitudes, its radius has increased by almost a factor of three. Over this same time the temperature of the layer has fallen from 3000 K to 2200 K. For this expansion velocity, the calculated mass rate loss is ¤ M /year.

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Data from spectrophotometric observations in the 485-1105 nm range at different times are used to determine the basic physical parameters of the continuum radiating layer of L 2 Pup: spectrophotometric temperatures, radii, and velocities of recession from the star's center. The phase dependences of these parameters over a cycle, during which the temperature varied from 2300 to 2900 K and the variations in radius were as high as 60%, are determined. The radius of the radiating layer is seen to vary irregularly, the radius of the layer is found to depend on wavelength, and the variations in the expansion velocity are evaluated.