%0 Generic %1 matute2013alhambra %A Matute, I. %A Masegosa, J. %A Márquez, I. %A Fernández-Soto, A. %A Husillos, C. %A del Olmo, A. %A Perea, J. %A Pović, M. %A Ascaso, B. %A Alfaro, E. J. %A Moles, M. %A Aguerri, J. A. L. %A Aparicio-Villegas, T. %A Benítez, N. %A Broadhurst, T. %A Cabrera-Cano, J. %A Castander, F. J. %A Cepa, J. %A Cerviño, M. %A Cristóbal-Hornillos, D. %A Infante, L. %A Delgado, R. M. González %A Martínez, V. J. %A Molino, A. %A Prada, F. %A Quintana, J. M. %D 2013 %K alhambra high-z qso survey %T The ALHAMBRA survey: Discovery of a faint QSO at z = 5.41 %U http://arxiv.org/abs/1307.5117 %X We aim to illustrate the potentiality of the Advanced Large, Homogeneous Area, Medium-Band Redshift Astronomical (ALHAMBRA) survey to investigate the high redshift universe through the detection of quasi stellar objects (QSOs) at redshifts larger than 5. The search for z>5 QSOs candidates was done by fitting an extensive library of spectral energy distributions --including active and non-active galaxy templates as well as stars-- to the photometric database of the ALHAMBRA survey (composed of 20 optical medium-band plus the 3 broad-band JHKs filters). Our selection over ~1 square degree of ALHAMBRA data (~1/4 of the total area covered by the survey), combined with GTC/OSIRIS spectroscopy, has yielded the identification of an optically faint QSO at very high redshift (z = 5.41). The QSO has an absolute magnitude of ~-24 at the 1450\AA continuum, a bolometric luminosity of ~2x10^46 erg/s and an estimated black hole mass of ~10^8 Msolar. This QSO adds itself to a reduced number of known UV faint sources at these redshifts. The preliminary derived space density is compatible with the most recent determinations of the high-z QSO luminosity functions (QLF). This new detection shows how ALHAMBRA, as well as forthcoming well designed photometric surveys, can provide a wealth of information on the origin and early evolution of this kind of objects.

@misc{matute2013alhambra, abstract = {We aim to illustrate the potentiality of the Advanced Large, Homogeneous Area, Medium-Band Redshift Astronomical (ALHAMBRA) survey to investigate the high redshift universe through the detection of quasi stellar objects (QSOs) at redshifts larger than 5. The search for z>5 QSOs candidates was done by fitting an extensive library of spectral energy distributions --including active and non-active galaxy templates as well as stars-- to the photometric database of the ALHAMBRA survey (composed of 20 optical medium-band plus the 3 broad-band JHKs filters). Our selection over ~1 square degree of ALHAMBRA data (~1/4 of the total area covered by the survey), combined with GTC/OSIRIS spectroscopy, has yielded the identification of an optically faint QSO at very high redshift (z = 5.41). The QSO has an absolute magnitude of ~-24 at the 1450{\AA} continuum, a bolometric luminosity of ~2x10^46 erg/s and an estimated black hole mass of ~10^8 Msolar. This QSO adds itself to a reduced number of known UV faint sources at these redshifts. The preliminary derived space density is compatible with the most recent determinations of the high-z QSO luminosity functions (QLF). This new detection shows how ALHAMBRA, as well as forthcoming well designed photometric surveys, can provide a wealth of information on the origin and early evolution of this kind of objects.}, added-at = {2013-07-22T18:58:04.000+0200}, author = {Matute, I. and Masegosa, J. and Márquez, I. and Fernández-Soto, A. and Husillos, C. and del Olmo, A. and Perea, J. and Pović, M. and Ascaso, B. and Alfaro, E. J. and Moles, M. and Aguerri, J. A. L. and Aparicio-Villegas, T. and Benítez, N. and Broadhurst, T. and Cabrera-Cano, J. and Castander, F. J. and Cepa, J. and Cerviño, M. and Cristóbal-Hornillos, D. and Infante, L. and Delgado, R. M. González and Martínez, V. J. and Molino, A. and Prada, F. and Quintana, J. M.}, biburl = {https://www.bibsonomy.org/bibtex/2c80bba6adc94b9ed28e25461db56b80f/miki}, description = {[1307.5117] The ALHAMBRA survey: Discovery of a faint QSO at z = 5.41}, interhash = {f00533ee3817c4ee65f2c91a8477f578}, intrahash = {c80bba6adc94b9ed28e25461db56b80f}, keywords = {alhambra high-z qso survey}, note = {cite arxiv:1307.5117Comment: 6 pages. Accepted for publication by A&A}, timestamp = {2013-07-22T18:58:04.000+0200}, title = {The ALHAMBRA survey: Discovery of a faint QSO at z = 5.41}, url = {http://arxiv.org/abs/1307.5117}, year = 2013 }