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Thanks, Thom, Mati and brian for your input. We are still in the middle of nowhere though. The eclipsing binary described is said to show 0.5 and 0.4 V mag. eclipses, so it's not HD 101331 (as Brian suggested). The star is not one of Mati's candidates either: HD 101190 = HIP 56757 = no variabilty. HD 101223 = not observed by Hipparcos. HD 101413 = HIP 56890 = no variabilty. HD 101436 = HIP 56897 = no variabilty. So none of this is the variable. The star is surely included in the GCVS by now.... I don't have access to the references of the Ouzts et al. paper. But from the abstract I could search for Popper work (1966) and St Popper's Survey of Spectra of Southern Eclipsing Binaries present sveral stars but none of them is shown as HD 101213 !!! Maybe it's one of the GCVS designated variables? But none of them is listed as hotter than B0... Two B0 stars: AB Crucis = HD 106871 = 8.38 - 9.19 V (HIP) (II= 8.82) So 0.8 and 0.4 mag. of amplitude = it's not our star. EM Carinae = HD 97484 = this is classified as O8V in SIMBAD... BUT it wasn't observed by Hipparcos.... And finally: TU Muscae !!!!!!!! (listed as B3) This is the star! HD 100213 = HIP 56196 = 8.17 - 8.75 V (GCVS) (II= 8.65) 0.6 and 0.5 mag. amplitude eclipses. Mistery solved. ;-)) Regards, Sebastian.
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