English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We present results from the first phase of the Seoul National UniversityBright Quasar Survey in Optical (SNUQSO) as well as its basic observationalsetup. Previous and current large-area surveys have been successful inidentifying many quasars, but they could have missed bright quasars due totheir survey design. In order to help complete the census of bright quasars, wehave performed spectroscopic observations of new bright quasar candidatesselected from various methods based on optical colors, near-infrared colors,radio, and X-ray data. In 2005/2006, we observed 55 bright quasar candidatesusing the Bohyunsan Optical Echelle Spectrograph (BOES) on the 1.8 m telescopeat the Bohyunsan Optical Astronomy Observatory in Korea. We identify 14quasars/Seyferts from our observation, including an optically bright quasarwith i=14.98 mag at z=0.092 (SDSS J003236.59-091026.2). Non-quasar/Seyfertobjects are found to be mostly stars, among which there are five M-type starsand one cataclysmic variable. Our result shows that there still exist brightquasars to be discovered. However, at the same time, we conclude that findingnew bright quasars in high Galactic latitude regions is very challenging andthat the existing compilation of optically bright quasars is nearly complete inthe northern hemisphere.

Seoul National University Bright Quasar Survey in Optical (SNUQSO) I: First Phase Observations and Results