SIMBAD references

We present a sample of accreting supermassive black holes (SMBHs) in dwarf galaxies at z<1. We identify dwarf galaxies in the NEWFIRM Medium Band Survey with stellar masses of M_*<3×10⁹ M_☉ that have spectroscopic redshifts from the DEEP2 survey and lie within the region covered by deep (flux limit of ∼5×10^–17\mbox–6×10^–16 erg cm^–2\s^–1) archival Chandra X-ray data. From our sample of 605 dwarf galaxies, 10 exhibit X-ray emission consistent with that arising from active galactic nucleus (AGN) activity. If black-hole mass scales roughly with stellar mass, then we expect that these AGNs are powered by SMBHs with masses of ∼10⁵\mbox–10⁶ M_☉ and typical Eddington ratios of ∼5%. Furthermore, we find an AGN fraction consistent with extrapolations of other searches of ∼0.6%\mbox–3% for 10⁹ M_☉\leqslantM_*\leqslant3×10⁹ M_☉ and 0.1<z<0.6. Our AGN fraction is in good agreement with a semi-analytic model, suggesting that, as we search larger volumes, we may use comparisons between observed AGN fractions and models to understand seeding mechanisms in the early universe.