The cool Galactic R Coronae Borealis variable DY Persei L. Začs, W. P. Chen, O. Alksnis, D. Kinoshita, F. A. Musaev, T. Brice, K. Sanchawala, H. T. Lee and C. W. Chen A&A, 438 2 (2005) L13-L16 Published online: 08 July 2005 DOI: 10.1051/0004-6361:200500118