2007ApJ...658..249L

We present multiwavelength observations of the very luminous ``E+A'' galaxy known as G515 (J152426.50+080908.0), including deep K_simaging, spatially resolved Hα spectroscopy, and radio observations. The data, together with detailed spectral synthesis of the galaxy's integrated stellar population, show that G515 is a ∼1 Gyr old postmerger, poststarburst galaxy. We detect no Balmer line emission in the galaxy, although there is a small amount of [N II] λλ6548, 6583 Å emission. The galaxy's H I mass has a 2 σ upper limit of 1.0x10⁹ M_☉. IRAS detections in the 60 and 100 µm bands indicate a far-infrared luminosity of ∼5.8x10¹⁰ L_☉. A small amount (∼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.