Beschreibung:
<jats:title>Abstract</jats:title><jats:p>We present the results of a preliminary search for variable objects in about 100 deg<jats:sup>2</jats:sup> of SDSS commissioning data surveyed twice with Δ<jats:italic>t</jats:italic>=1.99462 days. In particular, we find that the density of RR Lyrae star candidates abruptly ends at a galactocentric radius of 50–60 kpc.</jats:p>