The Sloan Digital Sky Survey Reverberation Mapping Project: estimating masses of black holes in quasars with single-epoch spectroscopy

E Dalla Bontà, BM Peterson, MC Bentz… - The Astrophysical …, 2020 - iopscience.iop.org
It is well known that reverberation mapping of active galactic nuclei (AGNs) reveals a
relationship between AGN luminosity and the size of the broad-line region, and that use of …

Quasar UV/X-ray relation luminosity distances are shorter than reverberation-measured radius–luminosity relation luminosity distances

N Khadka, M Zajaček, R Prince, S Panda… - Monthly Notices of …, 2023 - academic.oup.com
We use measurements of 59/58 quasars (QSOs), over a redshift range 0.0041≤ z≤ 1.686,
to do a comparative study of the radius–luminosity (R− L) and X-ray− UV luminosity (LX …

Science with a small two-band UV-photometry mission III: Active Galactic Nuclei and nuclear transients

M Zajaček, B Czerny, VK Jaiswal, M Štolc… - Space Science …, 2024 - Springer
In this review, the third one in the series focused on a small two-band UV-photometry
mission, we assess possibilities for a small UV two-band photometry mission in studying …

Time Delay of Mg ii Emission Response for the Luminous Quasar HE 0435-4312: toward Application of the High-accretor Radius–Luminosity Relation in Cosmology

M Zajaček, B Czerny… - The Astrophysical …, 2021 - iopscience.iop.org
Using six years of spectroscopic monitoring of the luminous quasar HE 0435-4312 (z=
1.2231) with the Southern African Large Telescope, in combination with photometric data …

Standardizing reverberation-measured C iv time-lag quasars, and using them with standardized Mg ii quasars to constrain cosmological parameters

S Cao, M Zajaček, S Panda… - Monthly Notices of …, 2022 - academic.oup.com
We use 38 C iv quasar (QSO) reverberation-mapped observations, which span eight orders
of magnitude in luminosity and the redshift range 0.001064≤ z≤ 3.368, to simultaneously …

OzDES Reverberation Mapping Programme: Mg ii lags and RL relation

Z Yu, P Martini, A Penton, TM Davis… - Monthly Notices of …, 2023 - academic.oup.com
The correlation between the broad line region radius and continuum luminosity (R–L
relation) of active galactic nuclei (AGNs) is critical for single-epoch mass estimates of …

Standardizing reverberation-measured Mg II time-lag quasars, by using the radius–luminosity relation, and constraining cosmological model parameters

N Khadka, Z Yu, M Zajaček… - Monthly Notices of …, 2021 - academic.oup.com
We use 78 reverberation-measured Mg II time-lag quasars (QSOs) in the redshift range
0.0033≤ z≤ 1.89 to constrain cosmological parameters in six different cosmological …

Consistency study of high- and low-accreting Mg ii quasars: no significant effect of the Fe ii to Mg ii flux ratio on the radius–luminosity relation dispersion

N Khadka, M Zajaček, S Panda… - Monthly Notices of …, 2022 - academic.oup.com
We use observations of 66 reverberation-measured Mg ii quasars (QSOs) in the redshift
range 0.36≤ z≤ 1.686–a subset of the 78 QSOs we previously studied that also have (flux …

Expectations for time-delay measurements in active galactic nuclei with the Vera Rubin Observatory

B Czerny, S Panda, R Prince, VK Jaiswal… - Astronomy & …, 2023 - aanda.org
Context. The Vera Rubin Observatory will provide an unprecedented set of time-dependent
observations of the sky. The planned Legacy Survey of Space and Time (LSST), operating …

Effects of heterogeneous data sets and time-lag measurement techniques on cosmological parameter constraints from Mg ii and C iv reverberation-mapped …

S Cao, M Zajaček, B Czerny, S Panda… - Monthly Notices of the …, 2024 - academic.oup.com
Previously, we demonstrated that Mg ii and C iv reverberation-mapped quasars (RM QSOs)
are standardizable and that the cosmological parameters inferred using the broad-line …