Following the announcement of an increase in brightness observed by Kojima.T on 20211110.586(vsnet-alert 26413), Vittorio Andreoli and Dr. Paolo Ochner report: We obtained low (3800-8000 Ang) and high (5750-6980 Ang) resolution spectra on 20211112.96 with the Asiago 1.22m Galileo Telescope + B&C spectrograph. The spectra show all Balmer lines in emission and emissions of He I 4923,5016,5876,6678 Ang; [O I] 6300,6364 Ang; Fe II 4730,5169,6432,6456,6495,6516 Ang; Fe I 6137,6191,6593 Ang; [S II] 6716,6734 Ang and strong H,K Ca II. Emissions appear narrow and in fact Balmer emissions have an FWHM of 500 km /s while He I 5876 has FWHM 200 km/s The spectrum is similar to that of the V899Mon outburst (Park et al 2021) so we classify this as a Young Star Object (YSO) outburst. Spectra are available at the following address: http://www.osservatoriomontebaldo.it/spettroscopia--ay_ori.html -----Messaggio originale----- Da: Taichi Kato <tkato@kusastro.kyoto-u.ac.jp> Inviato: sabato 13 novembre 2021 01:16 A: vsnet-alert@ooruri.kusastro.kyoto-u.ac.jp; vsnet-campaign-orion@ooruri.kusastro.kyoto-u.ac.jp Oggetto: [vsnet-alert 26415] Re: AY Ori Re: AY Ori

According to Kojima-san, AY Ori (CTTS) has brightened to 13.7 mag.

This brightening was also detected by ASAS-SN

EX Lup-type outburst?