The HARPS search for southern extra-solar planets - XVIII. An Earth-mass planet in the GJ 581 planetary system

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Table 2:

Fitted orbital solution for the GJ 581 planetary system: 4 Keplerians.
Parameter		GJ 581 e	GJ 581 b	GJ 581 c	GJ 581 d
P	[days]	3.14942 $\pm$ 0.00045	5.36874 $\pm$ 0.00019	12.9292 $\pm$ 0.0047	66.80 $\pm$ 0.14
T	[JD-2400000]	54716.80 $\pm$ 0.01	54712.62 $\pm$ 0.02	54699.42 $\pm$ 0.87	54603.0 $\pm$ 2.2
e		0 (fixed)	0 (fixed)	0.17 $\pm$ 0.07	0.38 $\pm$ 0.09
$\omega$	[deg]	0 (fixed)	0 (fixed)	-110 $\pm$ 25	-33 $\pm$ 15
K	[m s^-1]	1.85 $\pm$ 0.23	12.48 $\pm$ 0.23	3.24 $\pm$ 0.24	2.63 $\pm$ 0.32
V	[km s^-1]	-9.2082 $\pm$ 0.0002
f(m)	[10 $^{-14} M_{\odot}$ ]	0.21	108.11	4.34	10.05
$m_2 \sin{i}$	[ $M_\oplus$ ]	1.94	15.65	5.36	7.09
a	[AU]	0.03	0.04	0.07	0.22
$N_{{\rm meas}}$		119
Span	[days]	1570
$\sigma$ (O-C)	[ms^-1]	1.53
$\chi^2_{\rm red}$		1.49