Using the UVES echelle spectrograph at the ESO VLT we obtained high-resolution (R = 40 000) spectra of the object SDSS J1553+0056, which has been identified in the literature alternatively as a high-redshift quasar or as a Lyman-break galaxy (LBG). Although low-resolution spectra of SDSS J1553+0056 closely resemble those of LBGs, our high-resolution spectra allow us to identify this object unambiguously as a LoBAL quasar, probably belonging to the rare FeLoBALQSO class. Based on our spectrum we discuss how misidentifications of such objects from low-resolution spectra can be avoided.
@article{arxiv.astro-ph/0502207,
title = {SDSS J1553+0056: A BALQSO mimicking a Lyman-break galaxy},
author = {I. Appenzeller and O. Stahl and C. Tapken and D. Mehlert and S. Noll},
journal= {arXiv preprint arXiv:astro-ph/0502207},
year = {2009}
}
Comments
5 pages, 3 figures, accepted for publication in A&A