He also discovered several novas, including (Nova Aquilae 1999), (Nova Cygni 2001 no. 2), (Nova Puppis 2004), (Nova Cygni 2007) and (Nova Vulpeculae 2007 no.2).
In 2006 he was the first astronomer to discover a micro-lensing system outside the Magellanic Clouds and the bulge of our Milky Way. The star GSC 3656-1328 suddenly brightened by four magnitudes in two weeks time and returned to its normal brightness two weeks later. A red or a brown dwarf star passed exactly in front of GSC 3656-1328 and the gravity of the dwarf star directed more light to the observers on Earth.