Table 3
Fits to Radial Velocities

Data set	T_0^a
	P_spec	K	gamma	N	sigma^b
	
		(day)	(km s^-1)	(km s^-1)		(km s^-1)	
PBC J0325.6-0820^c
	56685.5866(18)	0.0871933(14)	120(13)	-3(10)	37	33	
Alternate	56685.589(2)	0.0856958(19)	117(14)	0(11)	37	36	
Swift J0503.7-2819	56683.6266(9)	0.05662(9)	189(20)	51(14)	24	49	
Alternate	56683.5779(10)	0.05356(6)	183(22)	36(15)	24	53	
PBC J0706.7+0327	56681.8996(5)	0.070907(11)	303(13)	-25(9)	27	31	
Swift J0939.7-3224^d
	57107.853(4)	0.3546(9)	86(6)	70(4)	40	20	
4PBC J1740.7+0603^e
	57195.882(4)	0.07011(20)	30(9)	-34(7)	113	30	
Swift J2124.6+0500	56605.091(17)	0.84913(11)^f
	115(12)	-17(9)	132	42	
Swift J2341.0+7645	56548.7460(16)	0.15424(20)	151(13)	-21(8)	38	27	

Notes. Parameters of least-squares fits to the radial velocities, of the form 





a Heliocentric Julian Date minus 2,400,000. The epoch is chosen to be near the center of the time interval covered by the data, and within one cycle of an actual observation.
b Root-mean-square residual of the fit.
c The two periods reflect different choices of daily cycle count over a 5-day gap, and the excessively precise periods tabulated here reflect in turn an arbitrary choice of cycle count between observing runs. For each choice of daily cycle count, the uncertainty in the gross period is ~9 x 10-5 days. See Section 3.1 for details.
d Fit to velocities from 2015 March only.
e Velocities are from He i emission; the daily cycle count is uncertain.
f The daily cycle count is reasonably secure, but there is an ambiguity at the scale of 1 cycle per 57 days.