**Table 2:** Lower lifetime limits $T_{\rm {min}}$ at different significance levels for 1612 MHz OH masers based on observations in this paper. P_n^m is the probability for finding exactly m extinguished maser among n stars reobserved after $\Delta t$ years.
n	m	$\Delta t$	$T_{\rm {min}}$	P_n^m	Comments
		[yr]	[yr]	[%]
114	0	28	550	0.2	3 $\sigma$	This paper
114	0	28	1050	4.6	2 $\sigma$
114	0	28	2800	31.8	1 $\sigma$

Source LaTeX | All tables | In the text