We discuss ASASSN-13db , an EX Lupi-type ( “ EXor ” ) accretion event on the young stellar object ( YSO ) SDSS J051011.01 - 032826.2 ( hereafter SDSSJ0510 ) discovered by the All-Sky Automated Survey for SuperNovae ( ASAS-SN ) .
Using archival photometric data of SDSSJ0510 we construct a pre-outburst spectral energy distribution ( SED ) and find that it is consistent with a low-mass class II YSO near the Orion star forming region ( d \sim 420 pc ) .
We present follow-up photometric and spectroscopic observations of the source after the \Delta V \sim - 5.4 magnitude outburst that began in September 2013 and ended in early 2014 .
These data indicate an increase in temperature and luminosity consistent with an accretion rate of \sim 10 ^ { -7 } { M _ { \odot } } yr ^ { -1 } , three or more orders of magnitude greater than in quiescence .
Spectroscopic observations show a forest of narrow emission lines dominated by neutral metallic lines from Fe i and some low-ionization lines .
The properties of ASASSN-13db are similar to those of the EXor prototype EX Lupi during its strongest observed outburst in late 2008 .