Year: 2025
Type: article
Abstract: We present here the design and development of the Cassegrain Module for the PARAS-2 spectrograph (CAMPAS). PARAS-2 is a high-resolution fiber-fed echelle spectrograph developed for the PRL 2.5 m telescope. The CAMPAS acts as a coupler between two optical systems, the PRL 2.5 m telescope and the PARAS-2 spectrograph. It has primarily been developed for the precise injection of the light beam into the optical fibers of the PARAS-2 spectrograph. The CAMPAS consists of a focal reducer, beam-guiding optics, an atmospheric dispersion corrector, optical fiber mounts, a calibration unit incorporating calibration lamps and beam-guiding optics, and other auxiliary subsystems. It was developed in-house at PRL, Ahmedabad, between the years 2020 and 2022 and was installed at one of the two side ports of the PRL 2.5 m telescope in March 2022. It is one of the first light instruments for the PRL 2.5 m telescope. The CAMPAS serves critical purposes of precise fiber feed, point spread function estimation, and atmospheric dispersion correction.
Authors: Kevikumar A. Lad, Neelam J. S. Prasad, Kapil Bharadwaj, Nikitha Jithendran, Ashirbad Nayak, Rishikesh Sharma, Abhijit G. Chakraborty, Vishal Joshi
Institution: Physical Research Laboratory
Language: English
Subfield: Instrumentation
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4415226436