Survey of Gravitationally lensed Objects in HSC Imaging (SuGOHI) — VII. Discovery and Confirmation of Three Strongly Lensed Quasars. (arXiv:2006.16584v3 [astro-ph.GA] UPDATED)

Survey of Gravitationally lensed Objects in HSC Imaging (SuGOHI) — VII. Discovery and Confirmation of Three Strongly Lensed Quasars. (arXiv:2006.16584v3 [astro-ph.GA] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Jaelani_A/0/1/0/all/0/1">Anton T. Jaelani</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Rusu_C/0/1/0/all/0/1">Cristian E. Rusu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kayo_I/0/1/0/all/0/1">Issha Kayo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+More_A/0/1/0/all/0/1">Anupreeta More</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sonnenfeld_A/0/1/0/all/0/1">Alessandro Sonnenfeld</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Silverman_J/0/1/0/all/0/1">John D. Silverman</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Schramm_M/0/1/0/all/0/1">Malte Schramm</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Anguita_T/0/1/0/all/0/1">Timo Anguita</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Inada_N/0/1/0/all/0/1">Naohisa Inada</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kondo_D/0/1/0/all/0/1">Daichi Kondo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Schechter_P/0/1/0/all/0/1">Paul L. Schechter</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lee_K/0/1/0/all/0/1">Khee-Gan Lee</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Oguri_M/0/1/0/all/0/1">Masamune Oguri</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Chan_J/0/1/0/all/0/1">James H. H. Chan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wong_K/0/1/0/all/0/1">Kenneth C. Wong</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Inoue_K/0/1/0/all/0/1">Kaiki T. Inoue</a>

We present spectroscopic confirmation of three new two-image gravitationally
lensed quasars, compiled from existing strong lens and X-ray catalogs. Images
of HSC J091843.27$-$022007.5 show a red galaxy with two blue point sources at
either side, separated by 2.26 arcsec. This system has a source and a lens
redshifts $z_s=0.804$ and $z_{ell}=0.459$, respectively, as obtained by our
follow-up spectroscopic data. CXCO J100201.50$+$020330.0 shows two point
sources separated by 0.85 arcsec on either side of an early-type galaxy. The
follow-up spectroscopic data confirm the fainter quasar has the same redshift
with the brighter quasar from the SDSS fiber spectrum at $z_s=2.016$. The
deflecting foreground galaxy is a typical early-type galaxy at a redshift of
$z_{ell}=0.439$. SDSS J135944.21$+$012809.8 has two point sources with quasar
spectra at the same redshift $z_s=1.096$, separated by 1.05 arcsec, and fits to
the HSC images confirm the presence of a galaxy between these. These
discoveries demonstrate the power of the Hyper Suprime-Cam Subaru Strategic
Program (HSC-SSP)’s deep imaging and wide sky coverage. Combined with existing
X-ray source catalogues and follow-up spectroscopy, the HSC-SSP provides us
unique opportunities to find multiple-image quasars lensed by a foreground
galaxy.

We present spectroscopic confirmation of three new two-image gravitationally
lensed quasars, compiled from existing strong lens and X-ray catalogs. Images
of HSC J091843.27$-$022007.5 show a red galaxy with two blue point sources at
either side, separated by 2.26 arcsec. This system has a source and a lens
redshifts $z_s=0.804$ and $z_{ell}=0.459$, respectively, as obtained by our
follow-up spectroscopic data. CXCO J100201.50$+$020330.0 shows two point
sources separated by 0.85 arcsec on either side of an early-type galaxy. The
follow-up spectroscopic data confirm the fainter quasar has the same redshift
with the brighter quasar from the SDSS fiber spectrum at $z_s=2.016$. The
deflecting foreground galaxy is a typical early-type galaxy at a redshift of
$z_{ell}=0.439$. SDSS J135944.21$+$012809.8 has two point sources with quasar
spectra at the same redshift $z_s=1.096$, separated by 1.05 arcsec, and fits to
the HSC images confirm the presence of a galaxy between these. These
discoveries demonstrate the power of the Hyper Suprime-Cam Subaru Strategic
Program (HSC-SSP)’s deep imaging and wide sky coverage. Combined with existing
X-ray source catalogues and follow-up spectroscopy, the HSC-SSP provides us
unique opportunities to find multiple-image quasars lensed by a foreground
galaxy.

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