Nikkei edges up as investors buy on the dips; Panasonic soars on investment plan

* Nikkei has been flat this week * Panasonic soars to the highest since Nov 2008 * Toshiba tumbles after SanDisk cut outlook By Ayai Tomisawa TOKYO, March 27 (Reuters) - Japan's Nikkei share average edged up on Friday morning in choppy trade as investors bought stocks on the dips after the previous day's falls, while Panasonic Corp attracted buying after it announced an acquisition plan. The Nikkei benchmark rose 0.4 percent to 19,548.48 in mid-morning trade, after diving 1.