Serendipitous discovery of a projected pair of QSOs separated by 4.5 arcsec on the sky - INSPIRE

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Serendipitous discovery of a projected pair of QSOs separated by 4.5 arcsec on the sky

Apr 5, 2016

16 pages

Published in:

Astron.J. 152 (2016) 13

e-Print:

1604.01361 [astro-ph.HE]

DOI:

10.3847/0004-6256/152/1/13

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Abstract: (arXiv)

We present the serendipitous discovery of a projected pair of quasi-stellar objects (QSOs) with an angular separation of

\Delta\theta =4.50

arcsec. The redshifts of the two QSOs are widely different: one, our programme target, is a QSO with a spectrum consistent with being a narrow line Seyfert 1 AGN at

z=2.05

. For this target we detect Lyman-

\alpha

, \ion{C}{4}, and \ion{C}{3]}. The other QSO, which by chance was included on the spectroscopic slit, is a Type 1 QSO at a redshift of

z=1.68

, for which we detect \ion{C}{4}, \ion{C}{3]} and \ion{Mg}{2}. We compare this system to previously detected projected QSO pairs and find that only about a dozen previously known pairs have smaller angular separation.

Note:

4 pages, 3 figures. Accepted for publication in AJ

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This preprint was prepared with the AAS LATEX macros v5.2