The contact binary system TYC 7275-1968-1 as seen by optical, UV and X-ray observations

• DOI: 10.48550/arxiv.2310.19712
• Publication Date: 2023-01-01
• Authors: I. J. Lima; Ana Carolina Matt...; G. J. M. Luna; A. S. Oliveira; C. V. Rodrigues; Natalia Palivanas; N. E. Nuñez
• Keywords: Contact binary; Symbiotic star; X-ray binary; Orbital period

We present an analysis of publicly available X-ray and optical observations TYC 7275-1968-1, a contact binary, red nova progenitor candidate. The long time series ASAS-SN, SuperWASP, CRTS, GAIA, ASAS-3, TESS enabled us to improve its orbital period 0.3828071 $\pm$ 0.0000026 d. show the presence UV source associated with 7275-1968-1 from Neil Gehrels Swift Observatory, that was previously assumed be counterpart CD -36 8436 (V1044 Cen), symbiotic star located 22 arcsec data indicate region temperature $kT$ = 0.8$^{+0.9}_{-0.1}$ keV luminosity 1.4$^{+0.1}_{-0.2}$ $\times$ 10$^{31}$ erg s $^{-1}$ in range 0.3 - 10 keV. detection X-rays modulated emission suggests both components binary are chromospherically active.