A moment ago; just now — an adverb indicating something that happened very recently (same sense as 'just now' or 'a little while ago').
彼は今しがた出かけたところだから、もう少し待ってください。
He just left a moment ago, so please wait a little longer.
今しがた届いたメールを確認してから返信します。
I'll check the email that just arrived a moment ago and then reply.
その知らせは今しがた発表されたところだ。
That announcement was just made a moment ago.