3B Class flare in the HeI 10830 A line.
The dozen filtergrams of the 3B Class flare at 23 September 98 in the active region NOAA 8340 is presented. All filtergrams have been obtained in the core of the HeI 10830 A line. FWHM of the passband of the used narrow-band tunable filter equals to 0.24 A. The size of the each frame is 190" x 198". The solar north is approximately at the top, east is at the left. The UT is given under every image. I have used 100 mm aperture on the Horizontal Solar Telescope of the Pulkovo Observatory. The filtergrams were recorded with CCD-camera ST-6 at 1s exposure. For the description of the filter see, please, my article "The narrow-band tunable solar filter for near-infrared spectral region" in the Journal "Solar Physics",vol.188,No.1,August 1999,p.81.
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