The Sensex at the Bombay Stock Exchange rose 147 points, to 19,561 in late morning deals, on sustained buying by funds and retail investors, amid a firming trend in Asian markets. Earlier, the 30-share index rose 125 points in the morning trade. The Sensex had gained 536 points in the previous three sessions.The Nifty at the National Stock Exchange regained 48 points, to 5,910.