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SERENDIPITOUS DISCOVERY OF A PROJECTED PAIR OF QSOs SEPARATED BY 4.5 arcsec ON THE SKY

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 program target, is a QSO with a spectrum consistent with being a narrow line Seyfert 1 active galactic nucleus at z = 2.05. For this target we detect Ly alpha, C IV, and C III]. 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 C IV, CIII], and Mg II. We compare this system to previously detected projected QSO pairs and find that only about a dozen previously known pairs have smaller angular separation.

Identiferoai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/621233
Date21 June 2016
CreatorsHeintz, K. E., Fynbo, J. P. U., Krogager, J.-K., Vestergaard, M., Møller, P., Arabsalmani, M., Geier, S., Noterdaeme, P., Ledoux, C., Saturni, F. G., Venemans, B.
ContributorsUniv Arizona, Steward Observ
PublisherIOP PUBLISHING LTD
Source SetsUniversity of Arizona
LanguageEnglish
Detected LanguageEnglish
TypeArticle
Rights© 2016. The American Astronomical Society. All rights reserved.
Relationhttp://stacks.iop.org/1538-3881/152/i=1/a=13?key=crossref.7ddc76a44352f94b18e9d1c64ba5fff3

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