Discovery of a bimodal luminosity distribution in the persistent Be/X-ray pulsar 2RXP J130159.6–635806

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Volume 698 (May 2025)

A&A, 698 (2025) A71

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Table 2.

Spectral parameters of J1301 from NuSTAR2024 data.

Parameter	`tbabs × cutoffpl`	`tbabs × (comptt+comptt)`
N_H, 10²² cm⁻²	2.4 ± 0.6	$1 . 6_{- 0.7}^{+ 1.5}$ $1.6^{+1.5}_{-0.7}$
Γ	0.9 ± 0.3
E_cut, keV	$7 . 6_{- 1.6}^{+ 2.7}$ $7.6^{+2.7}_{-1.6}$
T₀, keV		< 0.7
T_e, low, keV		$2 . 7_{- 0.3}^{+ 0.4}$ $2.7^{+0.4}_{-0.3}$
τ_low		$8 . 3_{- 1.4}^{+ 1.5}$ $8.3^{+1.5}_{-1.4}$
T_e, high, keV		$17_{- 7}^{23}$ $17^{23}_{-7}$
τ_high		> 100
Flux_2 − 10^(a)	1.9 ± 0.1	$1 . 8_{- 0.1}^{+ 0.2}$ $1.8^{+0.2}_{-0.1}$
Flux_bol^(b)	3.2 ± 0.3	$5 . 7_{- 1.8}^{+ 3.8}$ $5.7^{+3.8}_{-1.8}$
Luminosity_bol^(c)	$1 . 1_{- 0.5}^{+ 1.3}$ $1.1_{-0.5}^{+1.3}$	$2 . 0_{- 1.0}^{+ 2.3}$ $2.0_{-1.0}^{+2.3}$
W-stat/d.o.f.	836/900	826/897

Notes.

^(a)

Flux in the 2−10 keV range in units 10⁻¹² erg s⁻¹ cm⁻².

^(b)

Flux in the 0.5−100 keV range in units 10⁻¹² erg s⁻¹ cm⁻².

^(c)

Luminosity in the 0.5−100 keV range in units 10³⁴ erg s⁻¹; errors are given accounting for distance uncertainties.

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