Energy-resolved pulse profile changes in V 0332+53: Indications of wings in the cyclotron absorption line profile

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Volume 694 (February 2025)

A&A, 694 (2025) A316

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Table 2.

Best-fit parameters for ObsID 802, 804, 806, and 808.

	PF	1^st	2^st	Spectral
802

χ_red, lo²/d.o.f.	1.4/48	1.4/45	1.2/50	–
χ_red, hi²/d.o.f.	0.8/28	0.8/31	1.4/31	–
n_pol^(hi)	1	1	1	–
n_pol^(lo)	5	5	3	–
E_split (keV)	14.97	13.47	14.97	–
A₁	0.049±0.014	0.092±0.007	−0.049±0.008	–
E₁ (keV)	25.1 $_{- 0.2}^{+ 0.4}$ $_{-0.2}^{+0.4}$	24.88±0.07	24.81 $_{- 0.10}^{+ 0.14}$ $_{-0.10}^{+0.14}$	–
σ₁ (keV)	0.94±0.18	0.90±0.06	0.87 $_{- 0.19}^{+ 0.14}$ $_{-0.19}^{+0.14}$	–
A₂	0.52±0.04	0.58±0.02	–	–
E₂ (keV)	30.49±0.11	30.66±0.08	–	–
σ₂ (keV)	1.63 $_{- 0.10}^{+ 0.12}$ $_{-0.10}^{+0.12}$	2.11±0.08	–	–
D_cyc	–	–	–	0.863±0.002
E_cyc (keV)	–	–	–	27.93±0.02
σ_cyc (keV)	–	–	–	8.47±0.08

804

χ_red, lo²/d.o.f.	1.2/42	1.3/42	1.3/45	–
χ_red, hi²/d.o.f.	1.7/36	1.7/36	1.4/38	–
n_pol^(hi)	3	3	3	–
n_pol^(lo)	3	3	1	–
E_split (keV)	11.33	11.59	12.43	–
A₁	0.36±0.04	0.172±0.012	0.138±0.014	–
E₁ (keV)	25.74 $_{- 0.15}^{+ 0.18}$ $_{-0.15}^{+0.18}$	25.30±0.08	26.91±0.14	–
σ₁ (keV)	1.48 $_{- 0.13}^{+ 0.15}$ $_{-0.13}^{+0.15}$	1.14±0.09	1.27±0.16	–
A₂	0.70±0.05	0.460±0.019	–	–
E₂ (keV)	30.44±0.10	30.33±0.06	–	–
σ₂	1.63±0.12	1.41±0.06	–	–
D_cyc	–	–	–	0.861±0.002
E_cyc (keV)	–	–	–	28.25±0.02
σ_cyc (keV)	–	–	–	7.59±0.08

806

χ_red, lo²/d.o.f.	1.0/43	1.2/43	0.9/45	–
χ_red, hi²/d.o.f.	1.2/36	1.9/36	1.3/33	–
n_pol^(hi)	3	3	3	–
n_pol^(lo)	1	1	2	–
E_split (keV)	10.01	10.01	12.08	–
A₁	0.38±0.02	0.228±0.011	0.28 $_{- 0.10}^{+ 0.06}$ $_{-0.10}^{+0.06}$	0.86
E₁ (keV)	25.78±0.08	25.81±0.06	27.4 $_{- 0.5}^{+ 0.3}$ $_{-0.5}^{+0.3}$	27.93
σ₁ (keV)	1.20±0.06	1.12±0.05	1.96 $_{- 0.22}^{+ 0.18}$ $_{-0.22}^{+0.18}$	8.47
A₂	0.66±0.05	0.340±0.019	0.17 $_{- 0.05}^{+ 0.10}$ $_{-0.05}^{+0.10}$	–
E₂ (keV)	30.28±0.11	30.56±0.07	31 $_{- 2}^{+ 2}$ $_{-2}^{+2}$	–
σ₂ (keV)	1.68±0.14	1.16±0.06	2.0 $_{- 0.7}^{+ 0.5}$ $_{-0.7}^{+0.5}$	–
D_cyc	–	–	–	0.862±0.002
E_cyc (keV)	–	–	–	28.40±0.02
σ_cyc (keV)	–	–	–	7.59±0.08

808

χ_red, lo²/d.o.f.	1.5/36	0.7/38	2.0/36	–
χ_red, hi²/d.o.f.	1.6/17	1.3/16	1.5/15	–
n_pol^(hi)	1	1	1	–
n_pol^(lo)	2	1	3	–
E_split (keV)	11.81	12.13	12.40	–
A₁	1.02±0.05	0.80 $_{- 0.15}^{+ 0.30}$ $_{-0.15}^{+0.30}$	0.22±0.02	–
E₁ (keV)	26.62±0.09	27.2 $_{- 0.4}^{+ 0.7}$ $_{-0.4}^{+0.7}$	25.95±0.20	–
σ₁ (keV)	1.79±0.09	2.0 $_{- 0.3}^{+ 0.2}$ $_{-0.3}^{+0.2}$	1.78 $_{- 0.11}^{+ 0.09}$ $_{-0.11}^{+0.09}$	–
A₂	0.45 $_{- 0.07}^{+ 0.09}$ $_{-0.07}^{+0.09}$	−0.24 $_{- 0.15}^{+ 0.31}$ $_{-0.15}^{+0.31}$	0.64±0.13	–
E₂ (keV)	31.70 $_{- 0.18}^{+ 0.30}$ $_{-0.18}^{+0.30}$	29.40 $_{- 0.13}^{+ 1.75}$ $_{-0.13}^{+1.75}$	32.8 $_{- 0.4}^{+ 0.3}$ $_{-0.4}^{+0.3}$	–
σ₂ (keV)	0.98±0.17	0.76±0.19	1.46±0.16	–
D_cyc	–	–	–	0.899±0.003
E_cyc (keV)	–	–	–	29.03±0.04
σ_cyc (keV)	–	–	–	6.73±0.08

Notes. See the notes for Table 3.

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