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Table 1:

General properties of the sample.

Name
Ra (2000) Dec (2000) $12+\log({\rm O/H})^{a}$ Distance (Mpc)b M(HI)c Apparent size

NGC 1705
04h54'13.5'' -53$^{\circ}$21'40'' 8.46 4.7 5.1 $\times$ 107 1.9' $\times$ 1.4'
Haro 11 00h36'52.5'' -33$^{\circ}$33'19'' 7.9 92 $\sim $108 0.5' $\times$ 0.5'
Mrk 1089 05h01'37.8'' -04$^{\circ}$15'28'' 8.0 59.8 2.7 $\times$ 1010 0.61' $\times$ 0.23'
UM 311 01h15'34'' -00$^{\circ}$51'32'' 8.3 21.3 2.3 $\times$ 109 0.11' $\times$ 0.11'

a References for metallicities: NGC 1705: Meurer et al. (1992), Haro 11: Bergvall & Östlin (2002), Mrk 1089 and UM 311: Hopkins et al. (2002).
b References for distances: NGC 1705: Meurer et al. (1992), Haro 11: Bergvall et al. (2000), Mrk 1089 and UM 311: Hopkins et al. (2002).
c References for the HI mass: NGC 1705: 8.9 $\times$ 107 $M_\odot $ for D = 6.2 Mpc (Meurer et al. 1998), Haro 11: upper limit derived from the HI detection (Bergvall & Östlin 2002), Mrk 1089: 2.1 $\times$ 1010 $M_\odot $ for D=53 Mpc (Williams et al. 1991), UM 311: 3.1 $\times$ 109 $M_\odot $ for D = 24.7 Mpc (Smoker et al. 2000). The HI masses were scaled according to the distances we used.


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