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We report the discovery of a circular mid-infrared shell around theemission-line star Wray 16-137 using archival data of the Spitzer SpaceTelescope. Follow-up optical spectroscopy of Wray 16-137 with the SouthernAfrican Large Telescope revealed a rich emission spectrum typical of theclassical luminous blue variables (LBVs) like P Cygni. Subsequent spectroscopicand photometric observations showed drastic changes in the spectrum andbrightness during the last three years, meaning that Wray 16-137 currentlyundergoes an S Dor-like outburst. Namely, we found that the star has brightenedby \approx 1 mag in the V and I_c bands, while its spectrum became dominated byFe ii lines. Taken together, our observations unambiguously show that Wray16-137 is a new member of the family of Galactic bona fide LBVs.

Discovery of a new Galactic bona fide luminous blue variable with Spitzer