EDP Sciences
Free access
Volume 372, Number 3, June IV 2001
Page(s) L45 - L49
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20010579

A&A 372, L45-L49 (2001)
DOI: 10.1051/0004-6361:20010579

The first ISO ERO: A dusty quasar at z = 1.5

M. Pierre1, C. Lidman2, R. Hunstead3, D. Alloin2, M. Casali4, C. Cesarsky2, P. Chanial1, P.-A. Duc1, D. Fadda1, H. Flores1, S. Madden1 and L. Vigroux1

1  CEA Saclay, DSM/DAPNIA, Service d'Astrophysique, 91191 Gif-sur-Yvette, France
2  European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany
3  School of Physics, University of Sydney, NSW 2006, Australia
4  Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK

(Received 31 January 2001 / Accepted 23 April 2001 )

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 H$\alpha$ 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.

Key words: infrared: galaxies -- quasars: general -- galaxies: starburst -- quasar: individual: ISO J1324-2016

Offprint request: M. Pierre, mpierre@cea.fr

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© ESO 2001