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

K. E. Heintz, J. P. U. Fynbo, J. -K. Krogager +8

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…