linux sed 制表符,在sed中插入制表符的正确方法是什么？

What is the proper way to insert tab in sed? I'm inserting a header line into a stream using sed. I could probably do a replacement of some character afterward to put in tab using regular expression, but is there a better way to do it?

For example, let's say I have:

some_command | sed '1itextTABtext'

I would like the first line to look like this (text is separated by a tab character):

text text

I have tried substituting TAB in the command above with "\t", "\x09", " " (tab itself). I have tried it with and without double quotes and I can't get sed to insert tab in between the text.

I am trying to do this in SLES 9.