Abstract
This paper presents the results of near infrared spectrophotometry of the chromospherically strongly active binary HR 1099 before and after the extra energetic white-light flare of December 1989. Low-dispersion, CVF spectra between 2.3–4.2 μm for this star are given here for the first time. The effects of starspots at the time of the observation are calculated and an approximate blackbody spectrum is given. Comparison with multi-wavelength photometry and the IRAS measurements revealed strong emission band at 2.3 μm and absorption band at 3.1 μm by circumstellar matter. A preliminary discussion is made on the probable composition and distribution of the circumstellar matter.
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