A NICER and SMA Study of the high-mass gamma-ray binary Cygnus X-3 as a function of binary orbit and spectral state.

Cygnus X-3 is a high-mass gamma-ray binary and microquasar with a massive Wolf-Rayet companion star orbiting an all-but-confirmed Black Hole compact object. With an orbital period of ~0.19 days, observations show strong (and weak) modulation across the multi-wavelength spectrum. During 2018-2021, large multi-wavelength observing campaigns were made using: AGILE, AMA-LA, Faulkes, Fermi-LAT, NICER, MAXI, Metsahovi, RATAN-600, SMA, Swift-BAT. We present in this study a phase-resolved analysis of the NICER and SMA data taken during quiescent and flaring spectral states of Cygnus X-3. The NICER observations are modeled and the spectral evolution of various lines and edges studied as a function of the binary orbit and source spectral state are presented. We put our results in context of multi-wavelength observations that have been made.