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We present the largest collection of delta Scuti-type stars in the Milky Way.Together with the recently published OGLE collection of delta Sct variables inthe inner Galactic bulge, our sample consists of 24 488 objects distributedalong the Milky Way plane, over galactic longitudes ranging from about -170 degto +60 deg. The collection data include the I- and V-band time-seriesphotometry collected since 1997 during the OGLE-II, OGLE-III, and OGLE-IVsurveys. We show the on-sky distribution of delta Sct stars in the Galacticbulge and disk, discuss their period, luminosity and amplitude distributions,present Petersen diagram for multimode pulsators, distinguish 34 delta Sctstars in eclipsing and ellipsoidal binary systems, and list probable members ofglobular clusters.

Over 24 000 Delta Scuti Stars in the Galactic Bulge and Disk from the OGLE Survey