PRL Advanced Radial-velocity All-sky Search explained

PRL Advanced Radial-velocity Abu-sky Search, abbreviated PARAS,^[1] is a ground-based extrasolar planet search device. Based at 1.2m telescope is located at Mt. Abu, India. The project is funded by Physical Research Laboratory, India. The spectrograph works at a resolution of 67000. With the help of simultaneous calibration technique, PARAS has achieved an RV accuracy of 1.3 m/s for bright, quiet, sun-like stars. Thorium-Argon lamp is used for calibration. New calibration techniques are also being explored by the project team. PARAS can detect planet in the habitable zone around M-type stars.

References

• Book: 1607.06485. 10.1117/12.2232833. Precision velocimetry planet hunting with PARAS: Current performance and lessons to inform future extreme precision radial velocity instruments. Ground-based and Airborne Instrumentation for Astronomy VI. 2016. Evans. Christopher J. Simard. Luc. Takami. Hideki. Roy. Arpita. Chakraborty. Abhijit. Mahadevan. Suvrath. Chaturvedi. Priyanka. Prasad. Neelam J.S.S.V.. Shah. Vishal. Pathan. F. M.. Anandarao. B. G.. 119203005. 9908. 99086R.
• ISRO’s PRL scientists discover an ‘EPIC’ planet

Notes and References

1. Chakraborty, Abhijit & Mahadevan, Suvrath & Roy, Arpita & M. Pathan, Fazalahmed & Shah, Vishal & H. Richardson, Eric & Ubale, Girish & Shah, Rajesh. (2010). First light results from PARAS: The PRL Echelle spectrograph. Proc SPIE. 7735. .