The OGLE Collection of Variable Stars. Over 2600 δ Scuti Stars in the Small Magellanic Cloud
Soszyński, I.; Udalski, A.; Szymański, M. K.; Pietrukowicz, P.; Skowron, D. M.; Skowron, J.; Mróz, P.; Poleski, R.; Kozłowski, S.; Iwanek, P.; Wrona, M.; Gromadzki, M.; Ulaczyk, K.; Rybicki, K.
Poland, Israel
Abstract
We present the first-ever collection of δ Scuti stars found over the entire area of the Small Magellanic Cloud (SMC). The sample consists of 2810 variables of which over 2600 objects belong to the SMC while the remaining stars are most likely members of the Milky Way's halo. The sample has been divided into 2733 single mode and 77 multimode pulsators. We provide observational parameters (pulsation periods, mean magnitudes, amplitudes, Fourier coefficients) of all δ Sct stars and the long-term I- and V-band time-series photometric measurements collected during the fourth phase of the Optical Gravitational Lensing Experiment (OGLE-IV).