We present multiwavelength observations of the very luminous ” E+A ” galaxy known as G515 ( J152426.55+080906.7 ) , including deep K _ { s } imaging , spatially resolved H \alpha spectroscopy , and radio observations .
The data , together with detailed spectral synthesis of the galaxy ’ s integrated stellar population , show that G515 is a \sim 1 Gyr old post-merger , post-starburst galaxy .
We detect no Balmer line emission in the galaxy , although there is a small amount of [ N II ] \lambda \lambda 6548 , 6583 Ã Â emission .
The galaxy ’ s H I mass has a 2 \sigma upper limit of 1.0 \times 10 ^ { 9 } M _ { \odot } .
IRAS detections in the 60 \mu m and 100 \mu m bands indicate a far infrared luminosity of \sim 5.8 \times 10 ^ { 10 } L _ { \odot } .
A small amount ( \sim 3 mJy ) of radio continuum flux , which appears to be variable , has been detected .
The data suggest that G515 may have once been an ultraluminous infrared galaxy , and may harbor a weak , dust-obscured active nucleus .