3 papers
astro-ph2003
Variable Star Monitoring in Local Group Dwarf Irregular Galaxies
Jan Snigula, Claus Goessl, Ulrich Hopp +1
Dwarf galaxies in the local group provide a unique astrophysical laboratory. Despite their proximity some of these systems still lack a reliable distance determination as well as s…
astro-ph1999
Reconstruction of emission sites in the dwarf nova EX Draconis
Viki Joergens, Karl-Heinz Mantel, Heinz Barwig +2
We performed time-resolved spectroscopic studies of the double-eclipsing dwarf nova EX Dra (formerly HS 1804 + 6753) in order to locate line emitting sites in the system. Optical s…
astro-ph1998
Detailed optical studies of the galactic supersoft X-ray source QR And (RXJ0019.8+2156)
B. Deufel, H. Barwig, D. Simic +2
We present high-speed long term photometric observations from 1992 to 1996 (UBVRI), as well as recently obtained (1997) spectrophotometric and high resolution spectroscopic studies…