HD 173977: An ellipsoidal δ Scuti star variable E. Chapellier, P. Mathias, R. Garrido, J.-M. Le Contel, J.-P. Sareyan, I. Ribas, L. Parrao, A. Moya, J. H. Peña and M. Alvarez A&A, 426 1 (2004) 247-252 Published online: 05 October 2004 DOI: 10.1051/0004-6361:20034068