We report the identification of a new, long period detached eclipsing binary by the All-Sky Automated Survey for Supernovae (ASAS-SN). Combining V-band photometry from ASAS-SN, ASAS and KELT, we constructed a light curve spanning 2006-2018. ASASSN-V J192543.72+402619.0 is an eccentric detached eclipsing binary with an orbital period of P∼7.3 yr, a minimum orbital eccentricity of emin∼0.2 and a primary eclipse lasting ∼160 d. We also detect a secondary eclipse that is ∼0.6 mag shallower. Multi-band photometry suggests that the more luminous component of the binary is an M-giant. Further photometric and spectroscopic observations are encouraged.
@article{arxiv.1807.02116,
title = {ASAS-SN Identification of a Detached Eclipsing Binary System with a $\sim7.3$ Year Period},
author = {T. Jayasinghe and K. Z. Stanek and C. S. Kochanek and B. J. Shappee and T. W. -S. Holoien and T. A. Thompson and J. L. Prieto and Subo Dong and D. J. Stevens},
journal= {arXiv preprint arXiv:1807.02116},
year = {2018}
}