@article{10902/24778,
year = {2021},
url = {http://hdl.handle.net/10902/24778},
abstract = {We studied the accretion disc structure in the doubly imaged lensed quasar SDSS J1339+1310 using r-band light curves and UV-visible to near-IR spectra from the first 11 observational seasons after its discovery. The 2009−2019 light curves displayed pronounced microlensing variations on different timescales, and this microlensing signal permitted us to constrain the half-light radius of the 1930 Å continuum-emitting region. Assuming an accretion disc with an axis inclined at 60° to the line of sight, we obtained log(r1/2/cm) = 15.4−0.4+0.93. We also estimated the central black hole mass from spectroscopic data. The width of the C IV, Mg II, and Hβ emission lines, and the continuum luminosity at 1350, 3000, and 5100 Å, led to log(MBH/M⊙) = 8.6 ± 0.4. Thus, hot gas responsible for the 1930 Å continuum emission is likely orbiting a 4.0 × 108 M⊙ black hole at an r1/2 of only a few tens of Schwarzschild radii.},
organization = {We thank the anonymous referee for helpful comments that contributed to improve the original manuscript. This paper is based on observations made with the Liverpool Telescope (LT) and the AZT-22 Telescope at the Maidanak Observatory. The LT is operated on the island of La Palma by Liverpool John Moores University in the Spanish Observatorio del Roque de los Muchachos (ORM) of the Instituto de Astrofisica de Canarias (IAC) with financial support from the UK Science and Technology Facilities Council. We thank the staff of the LT for a kind interaction before, during and after the observations. The Maidanak Observatory is a facility of the Ulugh Beg Astronomical Institute (UBAI) of the Uzbekistan Academy of Sciences, which is operated in the framework of scientific agreements between UBAI and Russian, Ukrainian, US, German, French, Italian, Japanese, Korean, Taiwan, Swiss and other countries astronomical institutions. We also present observations with the Nordic Optical Telescope (NOT) and the Italian TNG, operated on the island of La Palma by the NOT Scientific Association and the Fundación Galileo Galilei of the Istituto Nazionale di Astrofisica, respectively, in the Spanish ORM of the IAC. We also used data taken from several archives: National Optical Astronomy Observatory Science Archive, Pan-STARRS1 Data Archive, Sloan Digital Sky Survey Data Releases, HST Data Archive, and ESO Science Archive Facility, and we are grateful to the many individuals and institutions who helped to create and maintain these public databases. This research has been supported by the MINECO/AEI/FEDER-UE grant AYA2017-89815-P and University of Cantabria funds to L.J.G. and V.N.S. This work was also supported by NSF award AST-1614018 to C.W.M. and M.A.C.},
publisher = {EDP Sciences},
publisher = {Astronomy & Astrophysics. Vol. 646, February 2021. A165},
title = {Resolving the inner accretion flow towards the central supermassive black hole in SDSS J1339+1310},
author = {Shalyapin, Vyacheslav and Goicoechea Santamaría, Luis Julián and Morgan, C. W. and Cornachione, M. A. and Sergeyev, A. V.},
}