Table 1: Sample of galaxies^a.

Galaxy	Seyfert	RA	Dec		Distanceb	(CO)c	(HCN)d
		[hh mm ss]	[ ]	[ ]	[Mpc]	['' 2]	['' 2]
NGC 3079	2	10 01 57.805	+55 40 47.20
NGC 1068	2	02 42 40.711	-00 00 47.81
NGC 2623	2	08 38 24.090	+25 45 16.80
NGC 1365	1.8	03 33 36.371	-36 08 25.45
NGC 7469	1.2	23 03 15.623	+08 52 26.39

a The Seyfert classification, positions (in equatorial J2000 coordinates) and heliocentric radial velocities were taken from NED. b The distances were calculated using the Hubble constant (    Mpc-1) estimated by Ngeow & Kanbur (2006). c The source sizes of the CO 1-0 transition line were estimated from the maps presented in Koda et al. (2002) for NGC 3079, Schinnerer et al. (2000) for NGC 1068, Bryant et al. (1999) for NGC 2623, Sandqvist (1999) for NGC 1365, and Papadopoulos & Allen (2000) for NGC 7469. The source sizes for the J = 2-1 transition line were assumed equal to that of the J = 1-0 line. For NGC 7469, the source size of the CO 2-1 emission estimated from the corresponding map presented by Davies et al. (2004) agrees well with the source size estimated for the CO 1-0 line. d Source sizes of HCN 1-0 were estimated from the corresponding maps published in Kohno et al. (2000) for NGC 3079, Kohno et al. (2001); and Helfer & Blitz (1995) for NGC 1068, Davies et al. (2004) for NGC 7469. The source sizes of NGC 2623 and NGC 1365 were estimated using proportions found in NGC 1068 (read text in Sect. 3.5). Because of their chemical link, the source sizes of the CN and HNC molecules were assumed the same as that of HCN. Due to the lack of high resolution maps, the source sizes corresponding to the emission of the higher transition lines were assumed equal to that of the J = 1-0 line.