Spectral and type I X-ray burst studies of 4U 1702−429 using AstroSat observations.

4U 1702−429, an atoll-type neutron star low-mass X-ray binary, was observed twice by the AstroSat /Soft X-ray Telescope (SXT) and Large Area X-ray Proportional Counters (LAXPC-20) on 2018 April 27 and 2019 August 8. Persistent emission spectra of the source were well fitted with the model combination - constant × tbabs (thcomp × diskbb+powerlaw). The parameters obtained from the spectral analysis revealed the source to be in a hard spectral state during the observations. Time-resolved spectral analyses were performed on the three type I X-ray bursts detected from the source. Burst analysis showed that the source underwent a photospheric radius expansion. Consequently, the radius of the neutron star and distance to the source (with isotropic and anisotropic burst emission) were obtained as 12.65 |$\substack{+0.90\\-0.86}$| km and 6.92 |$\substack{+0.16\\-0.09}$| and 8.43 |$\substack{+0.20\\-0.10}$| kpc, respectively. [ABSTRACT FROM AUTHOR]