The Seoul National University AGN monitoring project. II. BLR size and black hole mass of two AGNs. (arXiv:1910.02412v1 [astro-ph.GA])

The Seoul National University AGN monitoring project. II. BLR size and black hole mass of two AGNs. (arXiv:1910.02412v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Rakshit_S/0/1/0/all/0/1">Suvendu Rakshit</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Woo_J/0/1/0/all/0/1">Jong-Hak Woo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gallo_E/0/1/0/all/0/1">Elena Gallo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hodges_Kluck_E/0/1/0/all/0/1">Edmund Hodges-Kluck</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Shin_J/0/1/0/all/0/1">Jaejin Shin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Jeon_Y/0/1/0/all/0/1">Yiseul Jeon</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bae_H/0/1/0/all/0/1">Hyun-Jin Bae</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Baldassare_V/0/1/0/all/0/1">Vivienne Baldassare</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Cho_H/0/1/0/all/0/1">Hojin Cho</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Cho_W/0/1/0/all/0/1">Wanjin Cho</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Foord_A/0/1/0/all/0/1">Adi Foord</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kang_D/0/1/0/all/0/1">Daeun Kang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kang_W/0/1/0/all/0/1">Wonseok Kang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Karouzos_M/0/1/0/all/0/1">Marios Karouzos</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kim_M/0/1/0/all/0/1">Minjin Kim</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kim_T/0/1/0/all/0/1">Taewoo Kim</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Le_H/0/1/0/all/0/1">Huynh Anh N. Le</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Park_D/0/1/0/all/0/1">Daeseong Park</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Park_S/0/1/0/all/0/1">Songyoun Park</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Son_D/0/1/0/all/0/1">Donghoon Son</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sung_H/0/1/0/all/0/1">Hyun-il Sung</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bennert_V/0/1/0/all/0/1">Vardha N. Bennert</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Malkan_M/0/1/0/all/0/1">Matthew A. Malkan</a>

Active galactic nuclei (AGNs) show a correlation between the size of the
broad line region (BLR) and the monochromatic continuum luminosity at 5100 AA,
allowing black hole mass estimation based on single-epoch spectra. However, the
validity of the correlation is yet to be clearly tested for high-luminosity
AGNs. We present the first reverberation-mapping results of the Seoul National
University AGN monitoring program (SAMP), which is designed to focus on
luminous AGNs for probing the high end of the size-luminosity relation. We
report time lag measurements of two AGNs, namely, 2MASS J10261389+5237510 and
SDSS J161911.24+501109.2, using the light curves obtained over a $sim$1000 day
period with an average cadence of $sim$10 and $sim$20 days, respectively for
photometry and spectroscopy monitoring. Based on a cross-correlation analysis
and H$beta$ line width measurements, we determine the H$beta$ lag as
$41.8^{+4.9}_{-6.0}$ and $52.6^{+17.6}_{-14.7}$ days in the observed-frame, and
black hole mass as $3.65^{+0.49}_{-0.57} times 10^7 M_{odot}$ and
$23.02^{+7.81}_{-6.56} times 10^7 M_{odot}$, respectively for 2MASS J1026 and
SDSS J1619.

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