We report the first ground-based detections of the shallow transit of the super-Earth exoplanet 55 Cnc e using a 2-meter-class telescope .
Using differential spectrophotometry , we observed one transit in 2013 and another in 2014 , with average spectral resolutions of \sim 700 and \sim 250 , spanning the Johnson BVR photometric bands .
We find a white-light planet-to-star radius ratio of 0.0190 _ { -0.0027 } ^ { +0.0023 } from the 2013 observations and 0.0200 _ { -0.0018 } ^ { +0.0017 } from the 2014 observations .
The two datasets combined results in a radius ratio of 0.0198 _ { -0.0014 } ^ { +0.0013 } .
These values are all in agreement with previous space-based results .
Scintillation noise in the data prevents us from placing strong constraints on the presence of an extended hydrogen-rich atmosphere .
Nevertheless , our detections of 55 Cnc e in transit demonstrate that moderate-size telescopes on the ground will be capable of routine follow-up observations of super-Earth candidates discovered by the Transiting Exoplanet Survey Satellite ( TESS ) around bright stars .
We expect it will be also possible to place constraints on the atmospheric characteristics of those planets by devising observational strategies to minimize scintillation noise .