Chandrayaan-3 went up from the Second Launch Pad at SDSC-SHAR, Sriharikota
Background
ISRO's mission page records that the Chandrayaan-3 launch was scheduled at 14:35 Hrs. IST from the Second Launch Pad, SDSC-SHAR, Sriharikota, and that the LVM3 M4 vehicle successfully launched Chandrayaan-3 into orbit, with the health of the spacecraft normal.
Citizens were invited to witness the launch from the Launch View Gallery at SDSC-SHAR, Sriharikota, by registering online.
A Launch Rehearsal simulating the entire launch preparation and process, lasting 24 hours, was concluded before the flight.
After launch the Lander Module was successfully separated from the Propulsion Module, and the page logs the module in a 113 km x 157 km orbit and later a 25 km x 134 km orbit around the moon before powered descent.
The page also records that the Ch-3 Rover ramped down from the Lander, that the APXS on board the rover detected the presence of minor elements, and that the first observations came from the ChaSTE payload on board the Vikram Lander.
In plain words
ChaSTE Chandra's Surface Thermophysical Experiment — The payload on the Vikram Lander that returned the mission's first surface observations.
APXS Alpha Particle X-ray Spectrometer — The rover instrument that detected minor elements on the lunar surface.