We present the recent discovery of a new subdwarf B variable ( sdBV ) , with an exceptionally low surface gravity .
Our spectroscopy places it at T _ { eff } = 32100 \pm 1000 , \log g = 5.15 \pm 0.20 , and \log \left ( N _ { \mathrm { He } } / N _ { \mathrm { H } } \right ) = –2.8 \pm 0.2 .
With a magnitude of B = 12.0 , it is the second brightest V361 Hya star ever found .
Photometry from three different observatories reveals a temporal spectrum with eleven clearly detected periods in the range 376 to 566 s , and at least five more close to our detection limit .
These periods are unusually long for the V361 Hya class of short-period sdBV pulsators , but not unreasonable for p - and g -modes close to the radial fundamental , given its low surface gravity .
Of the \sim 50 short-period sdB pulsators known to date , only a single one has been found to have comparable spectroscopic parameters to GALEX J201337.6+092801 ( J20136+0928 , for short ) .
This is the enigmatic high-amplitude pulsator V338 Ser , and we conclude that J20136+0928 is the second example of this rare subclass of sdB pulsators located well above the canonical extreme horizontal branch in the HR diagram .