HS 1543+5921 -- a bright Z = 0.807 QSO in the center of the `Seyfert' galaxy SBS 1543+593

Details HS 1543+5921 -- a bright Z = 0.807 QSO in the center of the `Seyfert' galaxy SBS 1543+593 HS 1543+5921 -- a bright Z = 0.807 QSO in the center of the `Seyfert' galaxy SBS 1543+593

Jan 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...329l..25r&link_type=abstract

Astronomy and Astrophysics, v.329, p.L25-L28 (1998)

Astronomy and Astrophysics

Astrophysics

21

Quasars: Individual: Hs 1543+5921, Galaxies: Individual: Sbs 1543+593, Cosmology: Gravitational Lensing

Scientific paper

We show that the `Seyfert' galaxy SBS 1543+593 is a by-chance projection of the center of a nearby galaxy (z = 0.009) onto the bright QSO HS 1543+5921 (z = 0.807). The quasar has been discovered independently by the Hamburg Quasar Survey, an automated survey for bright QSOs based on digitized objective prism Schmidt plates. Direct imaging and subsequent spectroscopy of a faint (R = 22(m) ) HII region in the foreground galaxy allowed to measure the redshift of the galaxy which is a dwarf spiral or irregular galaxy (MR =~ -16.8). The galaxy center is located less than 3'' from the QSO. We briefly discuss a possible gravitational lensing effect. Based on observations from the German-Spanish Astronomical Center, Calar Alto, operated by the Max-Planck-Institut für Astronomie, Heidelberg, jointly with the National Commission for Astronomy

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