Table 1: Summary of VLBA H₂O maser observations.
MAIN Field: Low-Velocity Emission Sub-Field^b: EHV Emission

Epoch^a Number of $\theta_{\rm maj}\times\theta_{\min}$ PA Sensitivity^c Number of $\theta_{\rm maj}\times\theta_{\min}$ PA Sensitivity^c

antennas (mas $\times$ mas) (deg) (mJy beam^-1) antennas (mas $\times$ mas) (deg) (mJy beam^-1)

I 10^d 0.78 $\times$ 0.40 -2 3.4 5^f 2.8 $\times$ 1.4 +29 6.2

II 9^e 1.1 $\times$ 0.51 +26 3.7 5^f 2.8 $\times$ 1.5 +29 4.7

III 10^d 0.95 $\times$ 0.40 -14 2.8 5^f 2.9 $\times$ 1.6 +24 4.8

IV 10^d 1.1 $\times$ 0.39 -14 3.5 5^f 2.9 $\times$ 1.6 +27 6.9

^a The 4 epochs are 1999 April 1, May 5, June 5 and July 4. ^b The following data are common for the Sub-Fields 1 and 2 (see Sect. 4.2.2). ^c An rms image noise level with a velocity resolution of 0.2 km s^-1. ^d All 10 VLBA stations. ^e Except the North Liberty station. ^f Fort Davis, Los Alamos, Pie Town, Kitt Peak and Owens Valley.

**Table 1:** Summary of VLBA H₂O maser observations.
	MAIN Field: Low-Velocity Emission		Sub-Field^b: EHV Emission
Epoch^a	Number of	$\theta_{\rm maj}\times\theta_{\min}$	PA	Sensitivity^c	Number of	$\theta_{\rm maj}\times\theta_{\min}$	PA	Sensitivity^c
	antennas	(mas $\times$ mas)	(deg)	(mJy beam^-1)	antennas	(mas $\times$ mas)	(deg)	(mJy beam^-1)
I	10^d	0.78 $\times$ 0.40	-2	3.4	5^f	2.8 $\times$ 1.4	+29	6.2
II	9^e	1.1 $\times$ 0.51	+26	3.7	5^f	2.8 $\times$ 1.5	+29	4.7
III	10^d	0.95 $\times$ 0.40	-14	2.8	5^f	2.9 $\times$ 1.6	+24	4.8
IV	10^d	1.1 $\times$ 0.39	-14	3.5	5^f	2.9 $\times$ 1.6	+27	6.9

Source LaTeX | All tables | In the text

	1 Introduction
	2 IRAS 20050+2720
	3 Observations
	4 Results and analyses
	5 Discussion
	6 Summary
	References