多波段类星体巡天观测(英文)  

MULTI WAVELENGTH QUASAR SURVEY

作　　者：何香涛[1] 吴江华[1] 

机构地区：[1]北京师范大学天文系,北京100875

出　　处：《紫金山天文台台刊》1999年第3期211-216,共6页

基　　金：国家自然科学基金

摘　　要：在发现类星体的方法中，最有效的４ 种方法是：颜色方法，无缝光谱方法，射电方法和Ｘ射线方法。覆盖的波段为：射电波段，光学波段和Ｘ 射线波段。我们将４ 种方法联合在一起，应用于４ 个ＵＫＳｃｈｍｉｄｔ 天区。其目的是尽量减少选择效应，建立更完备的类星体巡天样本。本工作从１００２ 天区入手。已完成了Ｘ 射线选和部分光学选的分光观测工作。发现了一颗Ｂ＝ １５ ．０ 的亮类星体和一个Ｓｅｙｆｅｒｔ 对，其强Ｘ 射线辐射，是迄今首次观测到的。In order to reduce the selection effects and obtain highly complete samples, combined methods were used in recent quasar surveys. Our MWQS (Multi Wavelength Quasar Survey) combined four selection methods (radio selection, color selection, slitless spectroscopy selection, and X ray selection) in three wavelengths (radio, optical, and X ray) to reduce the selection effects. During the MWQS program, a bright quasar RXJ11315+1243 was discovered in field 1002 with magnitude B =15.1 and redshift z =0.09. During a program of identifying the RASS Bright Sources in ‘blank fields’, we found that the RXJ00031 0419 is a pair of Seyfert galaxies. It is the first know interacting Sytem with a bright X ray flux.

关 键 词：类星体 多波段 射电法 X射线法 观测 无缝光谱法 

分 类 号：P158[天文地球—天文学]