RT Journal Article T1 UCM 2257+2438, a new narrow-line seyfert 1 galaxy A1 Zamorano Calvo, Jaime A1 Gallego Maestro, Jesús A1 Rego Fernández, Manuel A1 Vitores, A. G. A1 González Riestra, R. AB Multiwavelength observations of the galaxy UCM 2257+2438 found in the Universidad Complutense of Madrid (UCM) objective-prism survey are reported. The optic spectroscopy, CCD imaging, near-infrared and IRAS photometric data suggest that this object is a narrow-line Seyfert 1 placed in the nucleus of a Sa nearly face-on galaxy with a significant contribution from starlight. PB IOP Publishing ltd SN 0004-6256 YR 1992 FD 1992-09 LK https://hdl.handle.net/20.500.14352/59821 UL https://hdl.handle.net/20.500.14352/59821 LA eng NO Balzano, V. A., & Weedman, D. W. 1981, ApJ, 243, 756Bonoli, C., Bonoli, F., Danese, L., Delpino, F., DeZotti, G., Granato, G., & Zitelli, V. 1989, in Active Galactic Nuclei, IAU Symposium No. 134, edited by D. E. Osterbrock and J. S. Miller (Kluwer, Dordrecht), p. 49Burstein, D., & Heiles, C. 1984, ApJS, 54, 33Davis, L. E., Cawson, M., Davies, R. L., & Illingworth, G 1985, AJ, 90, 169DeRobertis, M. M. 1985, ApJ, 289, 67DeRobertis, M. M., & Osterbrock, D. E. 1984 ApJ, 286, 171 de Vaucoleurs, G. 1948, Anuales d'Astrophysique, 11, 247Dixon, R. S., & Sonnebom, G. 1980, A Master List of Nonstellar Optical Astronomical Objects (Ohio State University Press, Columbus)Freeman, K. 1970, ApJ, 160, 811Hyland, A. R., & Allen, D. A. 1982, MNRAS, 199, 943Kazarian, M. A., & Kazarian, E. S. 1980, Afz, 16, 17Kent, S. M. 1985, PASP, 97, 165Koski, A. T. 1978, ApJ, 223, 56Natta, A., & Panagia, N. 1976, A&A, 50, 191Neltzer, J. A. & Mead, R. 1965, Computer Joumal No. 7, 308Osterbrock, D. E. 1977, ApJ, 215, 733Osterbrock, D. E., & Pogge, R. W. 1985, ApJ, 297, 166Osterbrock, D. E., & Shaw, R. A. 1988, ApJ, 327, 89Osterbrock, D. E., 1989, Astrophysics of Gaseous Nebulae and Active Galactic Nuclei (University Science Books, Mill Valley)Paturel, G., Fouqué, P., Bottinelli, L., & Gouguengheim, L. 1989, A&AS, 80, 299Rego, M., Zamorano, J., & González Riestra, R. 1989, A&AS, 62, 173 Rees, M. J. 1978, Nature, 275, 516Schombert, J. M., & Bothun, G. D. 1987, AJ, 93, 60 Simien, F., & de Vaucouleurs, G. 1986, ApJ, 302, 564Simkin, S. M., Su, H. J. & Schwarz, M. P. 1980, ApJ, 237, 404 Whittle, M. 1985, MNRAS, 213, 1Woltjer, L. 1990, in Active Galactic Nuclei, Saas-Fee Advanced Course No. 20, edited by R. D. Blandford, H. Netzer, and L. Woltjer (Springer, Berlin), p. 1Zamorano, J., & Rego, M. 1985, A&AS 62, 173Zamorano, J., Rego, M., & González Riestra, R. 1990, Ap&SS, 170, 353 NO © American Astronomical Society. This work was supported in part by the Spanish "Pro­grama Sectorial de Promoción General del Conocimiento" under Grant No PB89-124. The authors wish to thank an anonymous referee for his valuable comments and sugges­tions. NO Pro­grama Sectorial de Promoción General del Conocimiento (MEC), España NO Ministerio de Educación y Ciencia (MEC), España DS Docta Complutense RD 16 jul 2024