The article reports that a magnetar, a highly magnetized kind of pulsar, was found at black hole called Sagittarius A* (Sgr A*). It states that the pulses from magnetar can be utilized for measuring the warping of space-time near Sgr A* and testing predictions of Einstein's general theory of relativity. It mentions that the discovery of magnetar was due to the spotting of gas cloud G2 near Sgr AA* in 2012.