Very high energy γ-ray observations of the binary PSR B1259–63/SS2883 around the 2007 Periastron

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Table 3:

Spectral parameters for a power law fit to the monthly HESS data.
Period	$\overline{MJD}$	$\Delta^{+}_{\overline{MJD}}$	$\Delta^{-}_{\overline{MJD}}$	$\tau$	$\theta$	$\phi$	$\Gamma$	$\Phi _{0}$	F_E	$L_{\gamma}$	$\chi^{2}$ /ndf	$P_{\chi^{2}}$
	[d]	[d]	[d]					[10^-12 TeV^-1 cm^-2 s^-1]	[10^-12 erg cm^-2 s^-1]	[10³² erg s^-1]
2004	53104.4	...	...	...	...	...	$2.7\pm0.2$	$1.3\pm0.1$	$3.0\pm0.9$	$8\pm2$	2.3/5	0.81
2007
May	54 235.1	5.7	6.3	-74	-0.38	-0.060	$2.6\pm0.5$	$0.7\pm0.2$	$1.4\pm0.4$	$4\pm1$	2.374/3	0.50
June	54 263.1	5.7	8.3	-46	-0.35	-0.037	$3.8\pm0.5$	$1.5\pm0.2$	$3.0\pm0.4$	$8\pm1$	1.352/3	0.72
July	54 291.9	8.0	7.1	-17	-0.25	-0.014	$2.7\pm0.3$	$1.3\pm0.4$	$2.5\pm0.6$	$7\pm2$	1.294/3	0.73
Total^**	54 262.5	...	...	...	...	...	$2.8\pm0.2$	$1.1\pm0.1$	$2.2\pm0.6$	$6\pm2$	4.678/5	0.46

For the periods April and August, no spectrum could be obtained due to low statistics: Mean Modified Julian Date $\overline{MJD}$ , $\Delta^{+-}_{\overline{{MJD}}}$ date range, days relative to periastron $\tau$ , true anomaly $\theta$ , orbital phase (mean anomaly) $\phi$ , Photon index $\Gamma$ , flux normalisation $\Phi _{0}$ , mean energy flux F_E and $\gamma$ -ray luminosity $L_{{\hbox{$\gamma$ }}}$ above $1~\mbox{TeV}^{{\rm *}}$ , $\chi^{2}$ per number of degrees of freedom $\frac{\chi^{2}}{\rm {ndf}}$ and probability $P_{\chi^{2}}$ for the fit are shown. Shown are statistical errors only.
^* Monthly values for F_E and $L_{{\hbox{$\gamma$ }}}$ in 2007 have been computed assuming a fixed photon index of $\Gamma=2.8$ .
^** Entire HESS dataset from April to August 2007.

Source LaTeX | All tables | In the text

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