V-band light curve of PG 1121+422	5100A continuum light curve of PG 1121+422	Broad H{beta} line light curve of PG 1121+422
J/ApJS/278/61.graph_sqlPG=1121+422PG=1121+422 V-band	J/ApJS/278/61.graph_sql_5100PG=1121+422PG=1121+422 5100AA	J/ApJS/278/61.graph_sql_HbPG=1121+422PG=1121+422 Hbeta
V-band light curve of PG 0157+001	5100A continuum light curve of PG 0157+001	Broad H{beta} line light curve of PG 0157+001
J/ApJS/278/61.graph_sqlPG=0157+001PG=0157+001 V-band	J/ApJS/278/61.graph_sql_5100PG=0157+001PG=0157+001 5100AA	J/ApJS/278/61.graph_sql_HbPG=0157+001PG=0157+001 Hbeta
V-band light curve of PG 1341+258	5100A continuum light curve of PG 1341+258	Broad H{beta} line light curve of PG 1341+258
J/ApJS/278/61.graph_sqlPG=1341+258PG=1341+258 V-band	J/ApJS/278/61.graph_sql_5100PG=1341+258PG=1341+258 5100AA	J/ApJS/278/61.graph_sql_HbPG=1341+258PG=1341+258 Hbeta