2011CBET.2637....3T

S. Taubenberger, Max-Planck-Institut fuer Astrophysik; A. Pastorello, Queen's University; N. Elias-Rosa, Institute for Space Studies, Institut de Ciencies de l'Espai, IEEC, Consejo Superior de Investigaciones Cientificas; S. Benetti, Istituto Nazionale di Astrofisica (INAF), Padova; and F. Bufano, INAF, Catania, on behalf of a larger collaboration, report that a spectrogram (range 380-960 nm, resolution 1.2 nm) of PSN J10523453+2256052 was obtained with the 2.2-m telescope (+ CAFOS) of the Calar Alto Observatory on Jan. 17.1 UT. The spectrum shows a rather flat continuum with prominent and narrow (FWHM about 1200 km/s) hydrogen lines in emission; weak Fe II lines are also detected. The spectral characteristics and the faint absolute magnitude at discovery resemble those expected in the eruption of a luminous blue variable. A follow-up campaign for this transient is in progress.