Table 6: (V-I) colours of the extended LSB components in some irregular and BCD galaxies.
No. Galaxy   (V-I) $_{\rm LSB}$ a Telescope b   12+log (O/H) Telescope c Ref. d Ref. e
1 NGC 6789   0.98 HST   7.7 or 8.5 - ${\rm 19}$ ${\rm 2}$
2 He 2-10   0.95 HST   7.9 $^{\rm ***}$ 4 m ${\rm 19}$ ${\rm 11}$
3 NGC 625   0.90 HST   $\sim $8.2$^{\rm *}$ 1.6 m ${\rm 19}$ ${\rm 16}$
4 Mrk 996   0.90 HST   8.1 HST ${\rm 15}$ ${\rm 15}$
5 VII Zw 403   0.90 HST   7.73 4 m ${\rm 13}$ ${\rm 9}$
6 Mrk 209   0.88 2.1m   7.77 4 m ${\rm 19}$ ${\rm 8}$
7 UGCA 290   0.88 HST   $\sim $7.6 HST ${\rm 19}$ ${\rm 1}$
8 NGC 4214   0.86 HST   8.2 2.1 m ${\rm 19}$ ${\rm 10}$
9 SBS 1437+370   0.83 2.1m   7.93 4 m ${\rm 19}$ ${\rm 8}$
10 SBS 1319+579   0.83 2.1m   8.11 4 m ${\rm 19}$ ${\rm 8}$
11 NGC 1705   0.83 HST   8.36 1 m ${\rm 19}$ ${\rm 14}$
12 NGC 2366   0.80 HST   7.9 4 m ${\rm 19}$ ${\rm 8}$
13 UGC 4483   0.70 HST   7.58 4 m ${\rm 7}$ ${\rm 8}$
14 SBS 1249+493   0.68 2.1m   7.72 4 m ${\rm 19}$ ${\rm 8}$
15 SBS 1331+493   0.67 2.1m   7.77 4 m ${\rm 19}$ ${\rm 8}$
16 SBS 0940+544   0.58 2.1m   7.50 Keck ${\rm 3}$ ${\rm 3}$
17 SBS 1129+576   0.56 2.1m   7.42 4 m ${\rm 17}$ ${\rm 17}$
18 Tol 65   0.50 HST   7.54 Keck ${\rm 19}$ ${\rm 4}$
19 CG 1116+51   0.50 2.1m   7.5 MMT ${\rm 19}$ ${\rm 19}$
20 HS 1442+4250   0.40 2.1m   7.63 4 m ${\rm 18}$ ${\rm 18}$
21 SBS 1415+437   0.40 2.1m   7.61 4 m ${\rm 19}$ ${\rm 19}$
22 Tol 1214-277   0.40 HST   7.54 Keck ${\rm 19}$ ${\rm 4}$
23 Pox 186   0.40 HST   7.73 MMT ${\rm 19}$ ${\rm 19}$
24 I Zw 18C   0.10 HST   7.2$^{\rm **}$ Keck ${\rm 5}$ ${\rm 5}$
25 SBS 0335-052   0.0 HST   7.30 Keck ${\rm 12}$ ${\rm 6}$
26 I Zw 18   0.0 2.1 m, HST   7.2 Keck ${\rm 13}$ ${\rm 6}$
a Colour corrected for reddening in our Galaxy. E(V-I) $_{\rm Galaxy}$ are taken from the NED.
b Telescope used to obtain photometry.
c Telescope used to obtain spectroscopic data.
d Reference for the photometry.
e Reference for the chemical abundance.
* Our rough estimate.
** Oxygen abundance of the main component I Zw 18 NW + SE.
*** Oxygen abundance is calculated using the observed data by Kobulnicky et al. (1999) and calibration by Pilyugin (2000).
References: (1) Crone et al. (2002); (2) Drozdovsky et al. (2001); (3) Guseva et al. (2001); (4) Izotov et al. (2001a); (5) Izotov et al. (2001b); (6) Izotov et al. (1999); (7) Izotov & Thuan (2002); (8) Izotov & Thuan (1999); (9) Izotov et al. (1997a); (10) Kobulnicky & Skillman (1996); (11) Kobulnicky et al. (1999); (12) Papaderos et al. (1998); (13) Papaderos et al. (2002); (14) Storchi-Bergmann et al. (1994); (15) Thuan et al. (1996); (16) Vaceli et al. (1997); (17) Guseva et al. (2003a); (18) Guseva et al. (2003b); (19) this paper.


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