First data release from the spectroscopic study of low mass binaries carried out by the Eclipsing Reflection Effect Binaries from the OGLE Survey (EREBOS) project with FORS2
The EREBOS project is carried out under the ESO LP 196.D-0214, PI Veronika Schaffenroth, and studies the interaction of low-mass stellar and sub-stellar companions with low-mass stars. Several post-common envelope eclipsing binaries, with a hot sub-dwarf primary and a cool low mass companion, were selected using the photometric results of the Optical Gravitational Lensing Experiment (OGLE) and observed with FORS2 in long-slit mode.
This data release includes the reduced FORS2 1D spectra of the first observed 9 targets, together with a source catalogue providing positions, magnitudes and orbital periods derived from the OGLE survey. An additional catalogue of all individual observations including epochs and derived orbital phases is also published. The data released come with an extensive related documentation.
The next planned releases of this large programme will provide additional spectra and updated catalogs, including also additional atmospheric parameters and radial velocities.