6533b82afe1ef96bd128cc5d
RESEARCH PRODUCT
Accurate Period Determination of an Eclipsing Binary X-Ray Source in M33
Joel N. BregmanFabio RealeGiovanni PeresEric SchulmanAlfonso Collurasubject
PhysicsSpiral galaxyEinstein TelescopeSpace and Planetary ScienceBinary starROSATPhase (waves)Binary numberAstronomyAstronomy and AstrophysicsAstrophysicsLight curveEclipsedescription
We have analyzed the time variability of one of the X-ray sources in M33 observed by both the ROSAT and Einstein Observatory telescopes. The light curve of M33 X-7 exhibits a variability pattern of high and low states, suggesting an eclipsing binary X-ray source. The data suggest a binary period P=1.78572 days (very close to that of Her X-1) and an eclipse duration of ∼0.4 days. The low phase lasts about one-fourth of the period as in Cen X-3
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-12-01 | The Astrophysical Journal |