In December 2014 ASAS-SN was awarded generous grants from the Mt. Cuba Astronomical Foundation (hardware costs) and George Skestos (installation costs) to expand our Chile "Cassius" unit from two to four telescopes. We immediately ordered new Nikon lenses and ProLine PL230 cameras from FLI, and in early July 2015, thanks to hard work by LCOGT team, our two new cameras were deployed and started taking data.

For many telescopes there is a long delay (sometimes years) between the "first light", when the telescopes takes it first image, and actually taking useful data suitable for doing science. However, that delay is not long at all for ASAS-SN: once we collect several good images of a field with the new camera to construct a good reference image for image subtraction, our automated pipeline can start to flag supernova candidates and other transients in real time. Indeed, our first supernova discovered with one of the new "Cassius" telescopes was discovered on August 31st, 2105, and released as SN candidate ASASSN-15oz on September 3rd, 2015. ASASSN-15oz, immediately confirmed as a young Type II supernova, is not only very bright, in fact one of the brightest supernova currently seen on the sky, but it is also located in a faint host galaxy HIPASS J1919-33, only about 30 megaparsecs from us. With eight cameras fully operational ASAS-SN will be now able to cover about 20,000 square degrees each clear night, getting us that much closer to our ultimate goal of observing the entire available optical sky at least once every 24 hours.