10 citations · 22 across the 4 of their papers we have counts for
4 papers
Probing the origin of the two-component structure of broad line region by reverberation mapping of an extremely variable quasar
Shumpei Nagoshi, Fumihide Iwamuro, Satoshi Yamada +5
The physical origins of quasar components, such as the broad line region (BLR) and dust torus, remain under debate. To gain insights into them, we focused on Changing-State Quasars…
The relation between quasars' optical spectra and variability
Shumpei Nagoshi, Fumihide Iwamuro
This work aimed to find the relationship between quasars' optical variability and spectral features to reveal the regularity behind the random variation. It is known that quasar's…
Spectroscopic and Photometric Observations of Dwarf Nova Superoutbursts by the 3.8 m Telescope Seimei and the Variable Star Network
Yusuke Tampo, Keisuke Isogai, Naoto Kojiguchi +59
We present spectroscopic and photometric observations of 17 dwarf-nova superoutbursts obtained by KOOLS-IFU mounted on the 3.8 m telescope Seimei at Okayama Observatory of Kyoto Un…
Discovery of a new extreme changing-state quasar with 4 mag variation, SDSS J125809.31+351943.0
Shumpei Nagoshi, Fumihide Iwamuro, Kazuma Wada +1
We report the discovery of a quasar, SDSS J125809.31+351943.0 (J1258), which brightened in optical for 4 mag from 1983 to 2015, which is one of the largest quasar brightening event…