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Observations in the Mg XII 8.42 AA line onboard the CORONAS-F satellite haverevealed compact high temperature objects-hot X-ray points (HXP)-and theirmajor physical parameters were investigated. Time dependencies of temperature,emission measure, intensity, and electron density were measured for 169 HXPs.HXP can be divided into two groups by their temperature variations: those withgradually decreasing temperature and those with rapidly decreasing temperature.HXPs plasma temperatures lie in the range of 5-40 MK, the emission measure is$10^{45}$- $10^{48}$ cm$^{-3}$, and the electron density is above $10^{10}$cm$^{-3}$, which exceeds the electron density in the quiet Sun ($10^8$-$10^9$cm$^{-3}$). HXPs lifetimes vary between 5-100 minutes, significantly longerthan the conductive cooling time. This means that throughout a HXP's lifetime,the energy release process continues, which helps to maintain its hightemperature. A HXP's thermal energy is not greater than $10^{28}$ erg, and thetotal energy, which is released in HXPs, does not exceed $10^{30}$ erg. HXPsdiffer in their physical properties from other flare-like microevents, such asmicroflares, X-ray bright points, and nanoflares.

Investigation of Hot X-ray Points (HXPs) Using Spectroheliograph Mg XII Experiment Data From CORONAS-F/SPIRIT