The LMC eclipsing binary HV 2274 revisited

We reanalyse the UV/optical spectrum and optical broad-band data of the ecl ipsing binary HV 2274 in the LMC, and derive its distance following the met hod given by Guinan et al. (1998a,1998b) of fitting; theoretical spectra to the stars' UV/optical spectrum plus optical photometry. We describe the me thod in detail, pointing out the various assumptions that have to be made; moreover, we discuss the systematic effects of using different sets of mode l atmospheres and different sets of optical photometric data. It turns out that different selections of the photometric data, the set of model atmosph eres and the constraints on the value of the ratio of selective to total ex tinction in the V-band, result in a 25% range in distances (although some o f these models have a large chi (2)). For our best choice of these quantiti es the derived value for the reddening to HV 2274 is E(B - V) = 0.103 +/- 0 .007, and the de-reddened distance modulus is DM = 18.46 +/- 0.06; the DM t o the center of the LMC is found to be 18.42 +/- 0.07. This is significantl y larger than the DM of 18.30 +/- 0.07 derived by Guinan et al. (1998a).