Free Access

Table 4

Updated X-ray and optical/UV ephemeris of X1822-371.

Parameters X-ray Optical/UV

(MJD) 45 614.80953(16) 45 614.8116(11)
Porb0 (s) 20 054.2049(26) 20 054.188(10)
orb 1.514(80) 2.10(26)
χ2/(d.o.f.) 41.2/27 71.38/33

Notes. Uncertainties are at the 68% c.l. for a single parameter. The parameters are defined as in Table 1, the derivative of the orbital period is in units of 10-10 s/s. The updated values of , Porb0, and orb using X-ray data and optical/UV data are shown in Cols. 2 and 3, respectively.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.