MR. SABYASACHI CHATTOPADHYAY

DOTIFS stands for Devasthal Optical Telescope Integral Field Spectrograph. DOTIFS is a new multi-object Integral Field Spectrograph (IFS) being designed and fabricated by IUCAA for the Cassegrain side port of the 3.6m Devasthal Optical Telescope (DOT). Its main scientific objectives are the physics and kinematics of the ionized gas, star formation and H II regions in nearby galaxies. It is a novel instrument in terms of multi-IFU, built in deployment system and high throughput. It consists of one magnifier, 16 integral field units (IFUs), and 8 spectrographs. Each IFU is comprised of a microlens array and 144 optical fibers, and has 7.4” × 8.7” field of view with 144 spaxel elements with a sampling of 0.8” hexagonal aperture. The IFUs can be deployed on the telescope side port over an 8’ diameter focal plane by x-y actuators. 8 Identical, all refractive, dedicated fiber spectrographs will produce 2,304 R~1800 spectra over 370-740nm wavelength range with single exposure. In this talk we will present the progress made so far in some key aspects of the instrument.