The first ISO ERO: A dusty quasar at z = 1.5
Cesarsky, C.; Lidman, C.; Pierre, M.; Duc, P. -A.; Chanial, P.; Madden, S.; Vigroux, L.; Alloin, D.; Flores, H.; Fadda, D.; Casali, M.; Hunstead, R.
France, Germany, Australia, United Kingdom
Abstract
We report the discovery of an extremely red object (ERO) in a medium-deep ISOCAM extragalactic survey. The object is also a radio source. Subsequent VLT NIR spectroscopy revealed a prominent Hα line giving a redshift of 1.5. We present the spectrum and photometric data points and discuss evidence that ISO J1324-2016 is a quasar harbouring a significant amount of very hot dust. Based on observations collected at the ISO Observatory, Canada-France-Hawaii Telescope, Australia Telescope Compact Array, UKIRT, ROSAT and the European Southern Observatory (prg: 58.E-0885, 61.B-0369, 265.B-5005).