V4142 Sgr: Double periodic variable with an accretor surrounded by the accretion disk’s atmosphere

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Volume 670 (February 2023)

A&A, 670 (2023) A94

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Table 2.

Summary of spectroscopic observation using CHIRON spectrograph mounted on the SMARTS-1.5 m Telescope.

UT-date	Exptime (s)	HJD	ϕ_o	ϕ_l	S/N
2018-06-02	3600	2458271.69881789	0.7296	0.9179	110
2018-06-03	3600	2458272.73360867	0.7633	0.9188	81
2018-06-04	3600	2458273.72971956	0.7959	0.9196	118
2018-06-05	3600	2458274.73941726	0.8288	0.9204	41
2018-06-05	3600	2458274.78308750	0.8303	0.9205	106
2018-06-07	3600	2458276.71305890	0.8933	0.9221	90
2018-06-15	3600	2458284.71360285	0.1544	0.9287	93
2018-06-17	3600	2458286.70777669	0.2195	0.9304	85
2018-06-18	3600	2458287.68065316	0.2513	0.9312	73
2018-06-19	3600	2458288.65402813	0.2831	0.9320	78
2018-06-20	3600	2458289.72153509	0.3179	0.9329	153
2018-06-21	3600	2458290.70659200	0.3501	0.9337	73
2018-07-30	3600	2458329.64851880	0.6213	0.9660	93
2018-08-02	3600	2458332.61173707	0.7180	0.9684	107
2018-08-10	3600	2458340.60944136	0.9791	0.9750	57
2018-08-12	3600	2458342.59987233	0.0441	0.9767	109

Notes. The HJD at mid-exposure for the first spectrum series is given, the orbital (ϕ_o) and long cycle (ϕ_l) phases were calculated using Eqs. (1) and (2), respectively. These spectra have a spectral resolution of R ∼ 27 000.

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