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Table 3:

Swift-XRT  orbit merged spectral analysis of Mrk 421.
Interval a b K $E_{\rm p}*$ $E_{\rm p}$ $S_{\rm p}$ flux 0.3-10 keV $L_{\rm p}$ $\chi ^2_{r}$/d.o.f.
        keV keV $10^{-12} ~\rm erg~ cm^{-2} ~s^{-1}$ $10^{-12} ~\rm erg~ cm^{-2} ~s^{-1}$ $10^{45}~\rm erg/s $  

ObsId 00206476000    Date 2006 April 22    MJD 53847.252792
                 
01 1.68(0.009) 0.11(0.02) 0.349(0.002) 27(21) $26^{\rm +19}_{-8}$ 941(60) 2181.3 2(0.1) 1.275(398)
01 X+B 1.68(0.01) 0.12(0.02) 0.351(0.002)   20( $^{\rm +10}_{-6}$)       1.299(401)
02 1.76(0.01) 0.18(0.02) 0.289(0.002) 5(1) $4.7^{\rm +1}_{-0.6}$ 558(9) 1620.6 1.2(0.02) 1.187(300)
03 1.8(0.01) 0.09(0.02) 0.26(0.002) 14(14) $14^{\rm +15}_{-5}$ 540(27) 1499.0 1.16(0.06) 1.079(331)
04 1.79(0.01) 0.14(0.03) 0.257(0.002) 5(3) $5^{\rm +2}_{-1}$ 488(11) 1434.8 1.05(0.02) 1.122(254)
05 1.804(0.009) 0.13(0.02) 0.281(0.002) 6(2) $5.7^{\rm +2}_{-1}$ 532(9) 1570.4 1.14(0.02) 1.062(344)

ObsId 00030352005    Date 2006 April 25    MJD 53850.267940
                 
01 1.84(0.01) 0.15(0.02) 0.273(0.002) 3(1) $3.3^{\rm +0.7}_{-0.4}$ 480(5) 1466.7 1.03(0.01) 1.350(288)
02 1.859(0.008) 0.16(0.02) 0.266(0.001) 2.8(0.5) $2.8^{\rm +0.3}_{-0.2}$ 459(3) 1411.6 0.988(0.006) 1.363(379)

ObsId 00030352006    Date 2006 April 26    MJD 53851.204919
                 
01 1.824(0.009) 0.16(0.02) 0.289(0.002) 3.6(0.9) $3.6^{\rm +0.6}_{-0.4}$ 519(5) 1570.7 1.12(0.01) 1.416(336)

ObsId 00030352007    Date 2006 April 26    MJD 53851.951963
                 
01 1.87(0.01) 0.16(0.03) 0.265(0.002) 2.6(0.6) $2.6^{\rm +0.4}_{-0.3}$ 451(5) 1387.8 0.97(0.01) 1.085(258)

ObsId 00030352008    Date 2006 June 14    MJD 53900.016100
                 
01(c) 2.05(0.01) 0.15(0.03) 0.233(0.002) 0.67(0.1) $0.7^{\rm +0.09}_{-0.1}$ 377(3) 1102.4 0.811(0.006) 1.108(333)

ObsId 00030352009    Date 2006 June 15    MJD 53901.490493
                 
01 1.86(0.01) 0.03(0.02) 0.17(0.001) >100 - -(- -) - -(- -) 970.3 - -(- -) 1.191(400)
02 1.87(0.01) 0.15(0.03) 0.191(0.001) 2.7(0.8) $2.7^{\rm +0.5}_{-0.3}$ 326(3) 1007.0 0.701(0.006) 1.149(319)

ObsId 00030352010    Date 2006 June 16    MJD 53902.025296
                 
01 1.858(0.007) 0.1(0.01) 0.226(0.001) 6(2) $6^{\rm +2}_{-1}$ 409(6) 1244.5 0.88(0.01) 1.297(413)
02 1.77(0.008) 0.07(0.01) 0.27(0.001) >10 - -(- -) - -(- -) 1614.6 - -(- -) 1.227(420)
03 1.713(0.008) 0.04(0.02) 0.3(0.001) >100 - -(- -) - -(- -) 1927.8 - -(- -) 1.268(423)
04 1.766(0.006) 0.04(0.01) 0.274(0.001) >100 - -(- -) - -(- -) 1680.5 - -(- -) 1.273(477)
05 1.823(0.007) -0.02(0.01) 0.243(0.001) - - - -(- -) - -(- -) 1478.1 - -(- -) 1.310(439)
06 1.748(0.008) 0.03(0.02) 0.294(0.001) >100 - -(- -) - -(- -) 1840.3 - -(- -) 1.320(414)

ObsId 00030352011    Date 2006 June 18    MJD 53904.038766
                 
01 1.808(0.009) 0.12(0.02) 0.319(0.002) 7(3) $7^{\rm +3}_{-1}$ 613(13) 1794.7 1.32(0.03) 1.355(378)
02 1.82(0.01) 0.19(0.02) 0.341(0.002) 3(0.7) $3^{\rm +0.4}_{-0.3}$ 600(6) 1814.2 1.29(0.01) 1.348(315)
03 1.932(0.008) 0.12(0.02) 0.293(0.002) 1.9(0.3) $1.9^{\rm +0.2}_{-0.1}$ 479(3) 1508.2 1.031(0.006) 1.331(385)
04(c) 1.985(0.009) 0.09(0.02) 0.256(0.002) 1.2(0.2) $1.2^{\rm +0.1}_{-0.1}$ 410(3) 1299.8 0.882(0.006) 1.115(325)
05 1.893(0.008) 0.07(0.02) 0.277(0.001) 6(4) $6^{\rm +3}_{-1}$ 485(8) 1506.5 1.04(0.02) 1.209(395)
06 1.884(0.006) 0.08(0.01) 0.271(0.001) 5(2) $5^{\rm +2}_{-0.9}$ 475(5) 1475.1 1.02(0.01) 1.253(473)
07 1.866(0.008) 0.05(0.02) 0.222(0.001) >10 - -(- -) - -(- -) 1248.9 - -(- -) 1.264(419)
08(c) 1.989(0.008) 0.09(0.02) 0.213(0.001) 1.2(0.1) $1.2^{\rm +0.1}_{-0.1}$ 341(2) 1082.0 0.734(0.004) 1.148(392)
09 1.875(0.007) 0.01(0.01) 0.273(0.001) >100 - -(- -) - -(- -) 1569.5 - -(- -) 1.349(466)
10 1.821(0.007) 0.06(0.01) 0.298(0.001) >10 - -(- -) - -(- -) 1720.5 - -(- -) 1.295(467)

ObsId 00030352012    Date 2006 June 20    MJD 53907.001774
                 
01 1.842(0.007) 0.16(0.01) 0.289(0.001) 3.1(0.5) $3.1^{\rm +0.3}_{-0.2}$ 506(3) 1545.3 1.089(0.006) 1.179(419)
02 1.871(0.008) 0.11(0.02) 0.228(0.001) 4(1) $3.8^{\rm +0.9}_{-0.5}$ 398(4) 1230.8 0.856(0.009) 1.238(356)
03 1.861(0.008) 0.17(0.02) 0.287(0.001) 2.6(0.4) $2.6^{\rm +0.2}_{-0.2}$ 491(3) 1509.5 1.056(0.006) 1.322(382)
04 1.857(0.009) 0.17(0.02) 0.331(0.002) 2.6(0.4) $2.6^{\rm +0.2}_{-0.2}$ 568(4) 1741.4 1.222(0.009) 1.253(344)
05 1.915(0.009) 0.15(0.02) 0.318(0.002) 1.9(0.3) $1.9^{\rm +0.1}_{-0.1}$ 522(4) 1623.3 1.123(0.009) 1.283(328)

ObsId 00030352013    Date 2006 June 22    MJD 53908.050644
                 
01 1.942(0.007) 0.17(0.01) 0.3(0.001) 1.5(0.1) $1.47^{\rm +0.06}_{-0.05}$ 485(3) 1493.6 1.044(0.006) 1.261(393)
02(c) 1.982(0.008) 0.12(0.02) 0.255(0.001) 1.18(0.1) $1.18^{\rm +0.07}_{-0.07}$ 408(2) 1272.0 0.878(0.004) 1.247(354)
03 1.93(0.01) 0.04(0.03) 0.243(0.002) >10 - -(- -) - -(- -) 1323.0 - -(- -) 1.119(244)
04 1.81(0.01) 0.03(0.02) 0.281(0.002) >100 - -(- -) - -(- -) 1665.7 - -(- -) 1.403(278)
05 1.805(0.009) 0.09(0.02) 0.251(0.001) 14(12) $14^{\rm +13}_{-5}$ 520(23) 1446.2 1.12(0.05) 1.268(351)
06 1.87(0.006) 0.02(0.01) 0.242(0.001) >100 - -(- -) - -(- -) 1380.5 - -(- -) 1.263(455)

ObsId 00030352014    Date 2006 June 23    MJD 53909.394900
                 
01 1.74(0.01) 0.02(0.02) 0.326(0.003) >100 - -(- -) - -(- -) 2060.1 - -(- -) 1.163(281)
02 1.67(0.01) 0.06(0.03) 0.372(0.003) >100 - -(- -) - -(- -) 2435.1 - -(- -) 1.240(255)
03 1.66(0.01) 0.02(0.03) 0.411(0.004) >100 - -(- -) - -(- -) 2783.6 - -(- -) 1.110(276)
04 1.69(0.01) 0.04(0.03) 0.398(0.003) >100 - -(- -) - -(- -) 2603.6 - -(- -) 1.234(265)
05 1.63(0.01) 0.08(0.03) 0.436(0.004) >100 - -(- -) - -(- -) 2938.2 - -(- -) 1.357(284)
05 X+B 1.61(0.01) 0.13(0.02) 0.434(0.004)   34( $^{\rm +22}_{-11}$)       1.399(287)
06 1.67(0.01) 0.06(0.02) 0.434(0.003) >100 - -(- -) - -(- -) 2845.1 - -(- -) 1.079(291)
07 1.68(0.01) 0.07(0.03) 0.444(0.004) >100 - -(- -) - -(- -) 2870.2 - -(- -) 1.045(282)
08 1.76(0.01) 0.07(0.03) 0.393(0.003) >10 - -(- -) - -(- -) 2366.8 - -(- -) 1.098(255)
09 1.8(0.01) 0.03(0.02) 0.383(0.003) >100 - -(- -) - -(- -) 2302.1 - -(- -) 1.041(286)
10 1.79(0.01) 0.06(0.03) 0.384(0.003) >10 - -(- -) - -(- -) 2259.2 - -(- -) 1.025(249)

ObsId 00215769000    Date 2006 June 23    MJD 53909.671942
                 
01 1.64(0.01) 0.05(0.02) 0.386(0.003) >100 - -(- -) - -(- -) 2617.0 - -(- -) 1.099(310)

ObsId 00030352015    Date 2006 June 24    MJD 53910.068887
                 
01 1.844(0.007) 0.04(0.01) 0.422(0.002) >100 - -(- -) - -(- -) 2434.7 - -(- -) 1.317(418)
02 1.778(0.008) 0.12(0.02) 0.479(0.002) 8(4) $8^{\rm +3}_{-2}$ 970(22) 2752.4 2.09(0.05) 1.474(399)
03 1.832(0.009) 0.09(0.02) 0.43(0.002) 9(7) $9^{\rm +6}_{-3}$ 829(24) 2422.2 1.78(0.05) 1.181(354)
04 1.907(0.005) 0.08(0.01) 0.398(0.001) 4(1) $3.6^{\rm +0.7}_{-0.4}$ 675(4) 2131.8 1.452(0.009) 1.259(482)
05(c) 1.964(0.009) 0.08(0.02) 0.313(0.002) 1.7(0.4) $1.7^{\rm +0.2}_{-0.2}$ 505(3) 1618.7 1.087(0.006) 1.367(322)

ObsId 00030352016    Date 2006 June 27    MJD 53913.139963
                 
01 1.973(0.008) 0(0.02) 0.248(0.001) - - - -(- -) - -(- -) 1338.5 - -(- -) 1.072(339)

ObsId 00219237000    Date 2006 July 15    MJD 53931.277331
                 
01 1.65(0.01) 0.17(0.02) 0.532(0.004) 11(5) $11^{\rm +4}_{-2}$ 1299(50) 3288.2 2.8(0.1) 1.147(322)
01 X+B 1.64(0.01) 0.20(0.02) 0.535(0.05)   8( $^{\rm +2}_{-1}$)       1.235(325)
02 1.684(0.009) 0.16(0.02) 0.504(0.003) 9(4) $9^{\rm +3}_{-2}$ 1150(32) 3035.6 2.47(0.07) 1.136(369)
(c) Orbit with a strong cooling contamination.
The second third and forth column report the best fit estimate for the model in Eq. (2). The fifth column reports the value of the SED peak analytically estimated from Eq. (2) according to the best fit results. The sixth and seventh columns report the $E_{\rm p}$ and $S_{\rm p}$ best fit estimates using as best fit model Eq. (3). In the eighth column we report the flux in the 0.3-10.0 keV band, evaluated by X-spec integrating the Eq. (2) model. The ninth colum reports the SED peak flux luminoisty evaluated as $L_{\rm p}~\simeq~S_{\rm p}~4\pi~ D_L^2$, where $D_L\simeq 134.1$ Mpc is the luminosity distance. In the last column we report the reduced $\chi^2$ and the degrees of freedom concerning the Eq. (2) fit.

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