Optical , near - infrared and hard X – ray observations of SAXJ 1353 . 9 + 1820 : a red quasar ⋆
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چکیده
We present the results of a follow–up ASCA observation and multicolour optical and near-infrared photometry carried out at the 3.5-m Italian National Telescope Galileo of SAXJ 1353.9+1820. This object, serendipitously discovered by BeppoSAX in the 5–10 keV band, has been spectroscopically identified as a red quasar at z=0.217. The combined X–ray and optical–infrared data reveal the presence of a moderately luminous X–ray source (∼ 10 erg s) obscured by a column density of the order of 10 cm in a otherwise optically passive early-type galaxy. The implications for the nature of red quasars and their possible contribution to the hard X–ray background are briefly outlined.
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تاریخ انتشار 2000