SIMBAD references

In this paper we analyse 70 years of archival Harvard and Schmidt plate data of the 16.6-d Be X-ray binary A0538-66 in order to search for the presence of the long-term period of 420.82±0.79 d found in MACHO photometry. We find evidence for a long-term period of 421.29±0.95 d in the archival data, and examine its stability. We also combine the archival and MACHO data sets in order to improve the accuracy of the orbital period determination, using a cycle-counting analysis to refine its value to 16.6460±0.0004 d. We also test the model proposed in our previous paper with observations documented in the literature for A0538-66 from 1980 to 1995, constraining the system inclination to be i > 74.9 deg. ± 6.5 deg. .