SIMBAD references

We report the discovery of two new dwarf galaxies, Lacerta I/Andromeda XXXI (Lac I/And XXXI) and Cassiopeia III/Andromeda XXXII (Cas III/And XXXII), in stacked Pan-STARRS1 r_P1- and i_P1-band imaging data. Both are luminous systems (M_V∼ -12) located at projected distances of 20.°3 and 10.°5 from M31. Lac I and Cas III are likely satellites of the Andromeda galaxy with heliocentric distances of 756_–28⁺⁴⁴ kpc and 772_–56⁶¹, respectively, and corresponding M31-centric distances of 275±7 kpc and 1444_⁺⁶. The brightest of recent Local Group member discoveries, these two new dwarf galaxies owe their late discovery to their large sizes (r_h = 4.2_–0.5^+0.4 arcmin or 912_–93⁺¹²⁴ pc for Lac I; r_h = 6.5_–1.0^+1.2 arcmin or 1456±267 pc for Cas III) and consequently low surface brightness (µ₀∼ 26.0 mag/arcsec2), as well as to the lack of a systematic survey of regions at large radii from M31, close to the Galactic plane. This latter limitation is now alleviated by the 3π Pan-STARRS1 survey, which could lead to the discovery of other distant Andromeda satellite dwarf galaxies.