viper: High-precision radial velocities from the optical to the infrared Reaching 3 m/s in the K band of CRIRES+ with telluric modelling - Koehler, J.; Zechmeister, M.; Hatzes, A.; Chamarthi, S.; Nagel, E.; Seemann, U.; Ballester, P.; Bristow, P.; Chaturvedi, P.; Dorn, R. J.; Guenther, E.; Ivanov, V. D.; et al. (Astronomy and Astrophysics, 2025)