Free Access
Volume 556, August 2013
Article Number A135
Number of page(s) 9
Section Extragalactic astronomy
Published online 08 August 2013

Online material

thumbnail Fig. 3

Age and metallicity obtained from the spectral fitting for IGR J01528-0326, IGR J02524-0829, IGR J04451-0445, IGR J18244-5622, IGR J18308+0928, PBC J0041.6+2534, PBC J0759.9+2324, and PBC J0919.9+3712. The color scale refers to the mass fraction for each bin of age and metallicity. The red dot represents the mass-weighted age ⟨ t / Gyr ⟩ M and the mass-weighted metallicity ⟨   [M/H]   ⟩ M for each galaxy. The yellow dots represent the mass-weighted age ⟨ t / Gyr ⟩ M and the mass-weighted metallicity ⟨   [M/H]   ⟩ M in the case of two distinct stellar populations considered for the young and old component (see Sect. 4).

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thumbnail Fig. 4

Same as in Fig. 3 for PBC J1246.9+5432, PBC J1335.8+0301, PBC J1344.2+1934, PBC J1345.4+4141, PBC J1546.5+6931, Swift J0134.1-3625, Swift J0501.9-3239, and Swift J0601.9-8636.

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thumbnail Fig. 5

Same as in Fig. 3 for Swift J0811.5+0937, Swift J0911.2+4533, and Swift J1238.9-2720.

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Table 1

Properties of the galaxies in the sample.

© ESO, 2013

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