Quasar Spectrum (image) Association of Universities for Research in Astronomy (AURA) Share Print E-Mail Caption Combined Magellan/FIRE and Gemini/GNIRS near-infrared spectrum of the quasar J1342+0928. The inset shows the MgII line, which played a crucial role in determining the mass of the black hole and was obtained using GNIRS. Credit Bañados et al. Usage Restrictions Use with credit only Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.