The hard ultraluminous state of NGC 5055 ULX X-1 | Astronomy & Astrophysics (A&A)

Open Access

Table 2.

Best-fit parameters with 1σ level uncertainties derived from modeling the simultaneous XMM–Newton +NuSTAR dataset of NGC 5055.

Component	Parameter	DISKBB+DISKPBB	CUTOFFPL	SIMPL
CONS	𝒞_MOS1	1.03±0.02	1.03±0.02	1.03±0.02
	𝒞_MOS2	1.01±0.02	1.01±0.02	1.01±0.02
	𝒞_FPMA	0.89±0.04	0.89±0.04	0.89±0.04
	𝒞_FPMB	0.93±0.04	0.94±0.04	0.94±0.04
TBNEW_PCF	N_H [10²² cm⁻²]	0.56±0.05	0.57±0.05	0.53±0.05
	f_cov	0.83 $_{- 0.04}^{+ 0.03}$ $^{+0.03}_{-0.04}$	0.80 $_{- 0.05}^{+ 0.04}$ $^{+0.04}_{-0.05}$	0.75 $_{- 0.06}^{+ 0.04}$ $^{+0.04}_{-0.06}$
DISKBB	T_in [keV]	0.18±0.01	0.19±0.01	0.20±0.01
	NORM	90 $_{- 30}^{+ 50}$ $^{+50}_{-30}$	60 $_{- 20}^{+ 40}$ $^{+40}_{-20}$	40 $_{- 10}^{+ 20}$ $^{+20}_{-10}$
SIMPL	Γ_s	–	–	3.0 $_{- 0.6}^{+ 0.5}$ $^{+0.5}_{-0.6}$
	CF	–	–	0.6±0.3
DISKPBB	T_in [keV]	2.9±0.2	1.9 $_{- 0.2}^{+ 0.3}$ $^{+0.3}_{-0.2}$	1.7±0.2
	P	0.56±0.01	0.59 $_{- 0.03}^{+ 0.04}$ $^{+0.04}_{-0.03}$	0.62±0.03
	NORM [×10⁻⁴]	1.8 $_{- 0.5}^{+ 0.6}$ $^{+0.6}_{-0.5}$	9 $_{- 4}^{+ 6}$ $^{+6}_{-4}$	17 $_{- 6}^{+ 9}$ $^{+9}_{-6}$
CUTOFFPL	Γ_c	–	0.59^†	–
	E_cut [keV]	–	7.1^†	–
	NORM [×10⁻⁶]	–	20±4	–

CFLUX	F_X [10⁻¹² erg s⁻¹ cm⁻²]	2.02 $_{- 0.41}^{+ 0.52}$ $^{+0.52}_{-0.41}$	1.9 $_{- 0.4}^{+ 0.5}$ $^{+0.5}_{-0.4}$	1.8 $_{- 0.3}^{+ 0.5}$ $^{+0.5}_{-0.3}$
CGLUMIN	L_X [10⁴⁰ erg s⁻¹]	1.97 $_{- 0.40}^{+ 0.51}$ $^{+0.51}_{-0.40}$	1.86 $_{- 0.38}^{+ 0.48}$ $^{+0.48}_{-0.38}$	1.76 $_{- 0.81}^{+ 0.51}$ $^{+0.51}_{-0.81}$


χ²/dof	447.2/467	442.6/466	444.3/465

Notes. Reported fluxes and luminosities, which assume a distance of 9.04 Mpc, are computed in the 0.3–20 keV energy range. Parameters marked with ^†were frozen during the fit.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.