期刊
ASTRONOMY & ASTROPHYSICS
卷 442, 期 2, 页码 495-500出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20053494
关键词
Magellanic Clouds; quasars : general
We present the discovery of nine quasars behind the Large Magellanic Cloud, with emission redshifts ranging from 0.07 to 2.09. Six of them were identified as part of the systematic variability-based search for QSOs in the objects from the OGLE-II database. Combination of variability-based selection of candidates with the candidates' colours appears to be a powerful technique for identifying quasars, potentially reaching similar to 50% efficiency. We report an apparent correlation between variability magnitude and variability timescale, which - if confirmed could put even more constraints on QSO candidate selection. The remaining three quasars were identified via followup spectroscopy of optical counterparts to X-ray sources found serendipitously by the Chandra X-ray Observatory satellite. Even though the locations of the candidates were quite uniformly distributed over the LMC bar, the confirmed QSOs all appear near the bar's outskirts.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据