X-ray spectroscopy and photometry of the long-period polar AI Trianguli with XMM-Newton

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Volume 516 (June-July 2010)

A&A, 516 (2010) A76

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Table 3:

Results of the best XSPEC fits to the total and to the phase-resolved EPIC spectra of AI Tri.
Model^a	$\chi^2_{\rm red}$	$N_{\rm H,ISM}$	$kT_{\rm bb}$	$N_{\rm H,int}$	cover.	$kT_{\rm M,low}$	$kT_{\rm M,high}$	abund.	$A_{\rm bb}$	$L_{\rm bb,bol}$ ^b	$F_{\rm XMM}$
		[ $10^{20}~{\rm cm}^{-2}$ ]	[eV]	[ $10^{23}~{\rm cm}^{-2}$ ]		[keV]	[keV]		[ $10^6~{\rm km}^2$ ]	[ $10^{32}~{\rm erg~s}^{-1}$ ]	$[10^{-12}~{\rm erg~cm}^{-2}~{\rm s}^{-1}]$
2005/08/22
MEKAL	0.96	$1.7^{\rm +0.8}_{-0.7}$	$43.0^{\rm +3.2}_{-3.0}$	$3.7^{\rm +2.4}_{-1.2}$	$0.76^{\rm +0.08}_{-0.12}$	-	$6.4^{\rm +2.6}_{-1.8}$	$0.8^{\rm +0.7}_{-0.4}$	$1.9^{\rm +2.5}_{-1.0}$	$2.2^{\rm +1.6}_{-0.9}$	$7.2^{\rm +3.5}_{-2.1}$
2 MEKAL	0.95	$1.5^{\rm +0.9}_{-0.7}$	$43.7^{\rm +3.4}_{-3.0}$	$3.4^{\rm +1.7}_{-1.1}$	$0.75^{\rm +0.05}_{-0.07}$	$2.1^{\rm +2.1}_{-1.0}$	$9.1^{\rm +70}_{-3.0}$	$1.0^{\rm +1.0}_{-0.5}$	$1.6^{\rm +1.1}_{-0.8}$	$2.1^{\rm +1.5}_{-0.8}$	$7.0^{\rm +3.1}_{-2.0}$
3 MEKAL	0.94	$1.6^{\rm +0.9}_{-0.6}$	$44.4^{\rm +4.3}_{-5.8}$	$3.3^{\rm +2.1}_{-1.2}$	$0.74^{\rm +0.08}_{-0.06}$	$0.06^{\rm +0.03}_{-0.02}$
						$2.0^{\rm +3.5}_{-0.9}$	$9.2^{\rm +70}_{-2.8}$	$1.1^{\rm +1.3}_{-0.5}$	$1.1^{\rm +0.7}_{-0.7}$	$1.5^{\rm +1.5}_{-0.5}$	$8.4^{\rm +4.1}_{-2.8}$
CEMEKL	0.95	$1.6^{\rm +0.8}_{-0.7}$	$43.7^{\rm +3.2}_{-3.1}$	$3.3^{\rm +2.3}_{-1.3}$	$0.72^{\rm +0.09}_{-0.12}$	-	$11.8^{\rm +13.3}_{-5.1}$	$1.2^{\rm +1.3}_{-0.7}$	$1.6^{\rm +2.1}_{-0.9}$	$1.9^{\rm +0.5}_{-0.5}$	$6.8^{\rm +3.3}_{-1.9}$
MKCFLOW	0.95	$1.4^{\rm +0.4}_{-0.3}$	$44.5^{\rm +2.0}_{-0.5}$	$4.0^{\rm +1.0}_{-0.8}$	$0.68^{\rm +0.03}_{-0.06}$	<0.003	$48.5^{\rm +17.4}_{-4.9}$	$1.7^{\rm +1.1}_{-0.8}$	$1.3^{\rm +0.4}_{-0.5}$	$2.0^{\rm +1.5}_{-0.8}$	$6.3^{\rm +0.2}_{-0.2}$
accretion flow	0.94	$1.5^{\rm +0.8}_{-0.7}$	$43.9^{\rm +3.3}_{-3.2}$	$3.3^{\rm +2.5}_{-1.2}$	$0.72^{\rm +0.09}_{-0.12}$	$0.8^{\rm +0.4}_{-0.2}$	$20.0^{\rm +9.9}_{-6.1}$	$1.3^{\rm +1.0}_{-0.6}$	$1.6^{\rm +2.1}_{-0.8}$	$2.0^{\rm +1.5}_{-0.8}$	$6.6^{\rm +3.2}_{-1.8}$
Bright phase 1
MEKAL	0.95	$1.9^{\rm +1.0}_{-0.9}$	$42.3^{\rm +3.7}_{-3.5}$	$1.8^{\rm +2.2}_{-0.7}$	$0.73^{\rm +0.10}_{-0.15}$	-	$4.6^{\rm +4.5}_{-1.3}$	:=1.0	$4.9^{\rm +8.7}_{-3.0}$	$5.6^{\rm +5.5}_{-2.5}$	$16.4^{\rm +11.9}_{-6.1}$
Bright phase 2
MEKAL	1.03	$1.8^{\rm +1.6}_{-1.3}$	$44.0^{\rm +6.1}_{-5.6}$	$1.6^{\rm +2.9}_{-0.8}$	$0.82^{\rm +0.11}_{-0.14}$	-	$4.7^{\rm +11.4}_{-2.2}$	:=1.0	$2.0^{\rm +7.9}_{-1.5}$	$2.8^{\rm +5.5}_{-1.6}$	$8.0^{\rm +9.7}_{-3.7}$
Faint phase
MEKAL	1.08	$3.2^{\rm +4.3}_{-3.2}$	$25.1^{\rm +22.8}_{-19.2}$	$3.4^{\rm +3.5}_{-1.4}$	$0.85^{\rm +0.05}_{-0.07}$	-	$7.1^{\rm +4.8}_{-2.7}$	:=1.0	$2.7^{\rm +7.1}_{-7.1}$	$2.0^{\rm +1.1}_{-1.1}$	$3.4^{\rm +8.7}_{-2.4}$
Minimum phase
MEKAL	1.32	<3.0	$50.2^{\rm +17.8}_{-12.6}$	$14.7^{\rm +11.6}_{-6.7}$	1.0	-	$3.2^{\rm +9.9}_{-1.7}$	:=1.0	$0.09^{\rm +1.09}_{-0.03}$	$0.15^{\rm +0.06}_{-0.47}$	$1.1^{\rm +1.1}_{-0.4}$
2005/08/15^c
MEKAL	1.08	$3.6^{\rm +0.7}_{-0.6}$	$45.3^{\rm +2.2}_{-2.2}$	$15.6^{\rm +15.5}_{-10.9}$	1.0	-	$2.7^{\rm +16.0}_{-1.2}$	:=1.0	$25.9^{\rm +13.2}_{-7.7}$	$38.0^{\rm +13.4}_{-8.3}$	$\rm 104^{+42}_{-27}$

Notes. ^(a) The soft component in all models is a multi-temperature black body with maximum temperature $kT_{\rm bb}$ . ^(b) Bolometric black-body luminosities are determined as $L_{\rm bb,bol}=2\pi d^2F_{\rm bb}$ , and the model fluxes by means of the CFLUX model. ^(c) Simultaneous fit to EPIC and RGS data.

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