PRL Advanced Radial-velocity All-sky Search


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 the bright sun like quiet 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.


  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. doi:10.1117/12.856555.
  • Roy, Arpita; Chakraborty, Abhijit; Mahadevan, Suvrath; Chaturvedi, Priyanka; Prasad, Neelam J.S.S.V.; Shah, Vishal; Pathan, F. M.; Anandarao, B. G. (2016). "Precision velocimetry planet hunting with PARAS: Current performance and lessons to inform future extreme precision radial velocity instruments". In Evans, Christopher J; Simard, Luc; Takami, Hideki (eds.). Ground-based and Airborne Instrumentation for Astronomy VI. 9908. pp. 99086R. arXiv:1607.06485. doi:10.1117/12.2232833. S2CID 119203005.
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