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We present observations of four bright stars observed with the AstroSat SoftX-ray Telescope (SXT). Visible light from bright stars like these can leakthrough the very thin filter in front of the CCD in the focal plane CCD cameraof the SXT and thus making the extraction of X-ray events difficult. Here, weshow how to extract the X-ray events without contamination by the visiblelight. The procedure applied to four bright stars here demonstrates howreliable X-ray information can be derived in such cases. The sample of brightstars studied here consists of two A spectral types (HIP 19265, HIP 88580), oneG/K Giant (Capella), and a nearby M-type dwarf (HIP 23309). No X-ray emissionis observed from the A-type stars, as expected. X-ray spectra of Capella andHIP 23309 are derived and modeled here, and compared with the previous X-rayobservations of these stars to show the reliability of the method used. We findthat optical light can start to leak in the very soft energy bands below 0.5keV for stars with V=8 mag. In the process, we present the first X-ray spectrumof HIP 23309.

Observations of bright stars with AstroSat Soft X-ray Telescope