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Estimation of radiation flux in the ESPriF viewing channel in different photometric bands

In the article by M. V. Yushkin, E. V. Emelyanov, Yu. B. Verich 2023 // ASTROPHYSICAL BULLETIN, 2023, Vol. 78, No. 4, pp. 613–622 the authors estimated the radiation flux in the ESPriF viewing channel in different photometric bands. To estimate the number of photons collected by the telescope in the primary focus, Vega ( α Lyr ) was adopted as the zero magnitude standard. The calculation was performed separately for each of the four UBVR photometric bands. The spectral flux density of Vega outside the atmosphere f Vega λ , the value of the effective wavelength λ Vega eff , and the width Δλ of each photometric band were taken from the work of Fukugita et al. (1995, Publ. Astron. Soc. Pacific, 107, 945) . The calculation results are shown in the table: