NGC 3628 and a pair of Quasars

From the author of Sizing Up The Universe

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23:05 EDT Mar 16, 2010.
Starlight Express SXV-H9 on 10" RC at f/9.
L=145min (guided 5-minute subexposures). Lumicon Light Pollution Filter.

These quasars have been studied by Arp et al.
Their work is published in A&A, 391, 833-840 (2002) and is available online at
http://www.aanda.org/index.php?option=article&access=bibcode&bibcode=2002A%2526A...391..833AFUL
(see Figure 4).

The quasars are mag 19.5.