INTEGRAL/IBIS polarization detection in the hard and soft intermediate states of Swift J1727.8−1613

Home

All issues

Volume 688 (August 2024)

A&A, 688 (2024) L5

Full HTML

Open Access

Table 1.

Parameters from 5 to 500 keV spectral fits for the observation groups defined in Fig. 1.

Group #	C_JEM-X	Γ_CPL	E_cut	Flux_{CPL, 30 − 300 keV}	Γ_PL	Flux_{PL, 30 − 300 keV}	$χ_{ν}^{2} (d . o . f .)$ $\chi_\nu^2 ({\rm d.o.f.})$	$\frac{F_{PL, 210 - 300}}{F_{Total, 210 - 300}}$ $\frac{F_{\mathrm{PL},210{-}300}}{F_{\mathrm{Total},210{-}300}}$
			[keV]	[10⁻⁹ erg cm⁻² s⁻¹]		[10⁻⁹ erg cm⁻² s⁻¹]
1	1.79	1.47 $_{- 0.13}^{+ 0.07}$ $_{-0.13}^{+0.07}$	33±2	46	2.1 $_{- 0.3}^{+ 0.2}$ $_{-0.3}^{+0.2}$	7.1	1.48 (39)	90%
2^(†)	0.72	2.00 $_{- 0.11}^{+ 0.04}$ $_{-0.11}^{+0.04}$	44 $_{- 5}^{+ 4}$ $_{-5}^{+4}$	33	2.1 $_{- 0.4}^{+ 0.3}$ $_{-0.4}^{+0.3}$	7.6	1.08 (40)	90%
3^(†)	0.94	2.24 $_{- 0.13}^{+ 0.07}$ $_{-0.13}^{+0.07}$	41 $_{- 4}^{+ 4}$ $_{-4}^{+4}$	28	2.2 $_{- 0.3}^{+ 0.2}$ $_{-0.3}^{+0.2}$	8.9	0.84 (40)	91%
4^(†)	0.89	2.11 ± 0.03	57 $_{- 11}^{+ 7}$ $_{-11}^{+7}$	23	1.4 $_{- 0.6}^{+ 0.8}$ $_{-0.6}^{+0.8}$	3.5	1.03(40)	81%
5^(*)	1.02	2.46 ± 0.07	152 $_{- 20}^{+ 26}$ $_{-20}^{+26}$	17	–	–	1.22 (36)	–
6^(‡)	0.91	–	–	–	2.68 ± 0.02	9.6	1.24 (41)	–
7^(‡)	1.05	2.51 ± 0.10	274 $_{- 76}^{+ 163}$ $_{-76}^{+163}$	10	–	–	1.31 (40)	–
8^(‡)	0.91	–	–	–	2.64 ± 0.03	5.6	1.77 (41)	–

Notes. Missing entries indicate that a component was not required. Errors are the 90% confidence intervals.

^(*)

JEM-X spectrum ignored below 7 keV due to large instrumental residuals.

^(†)

Gaussian emission line with fixed center at 6.4 keV.

^(‡)

Thermal disk with a fixed temperature of 1 keV.

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.