IGR J19552+0044: A new asynchronous short period polar: "Filling the gap between intermediate and ordinary polars"

G. Tovmassian, D. Gonzalez-Buitrago, J. Thorstensen +23

Based on XMM--Newton X-ray observations IGR J19552+0044 appears to be either a pre-polar or an asynchronous polar. We conducted follow-up optical observations to identify the sourc…