10 NEW BL LACERTAE OBJECTS DISCOVERED BY AN EFFICIENT X-RAY RADIO OPTICAL TECHNIQUE

被引：117

作者：

SCHACHTER, JF ^{[1
]}

STOCKE, JT ^{[1
]}

PERLMAN, E ^{[1
]}

ELVIS, M ^{[1
]}

REMILLARD, R ^{[1
]}

GRANADOS, A ^{[1
]}

LUU, J ^{[1
]}

HUCHRA, JP ^{[1
]}

HUMPHREYS, R ^{[1
]}

URRY, CM ^{[1
]}

WALLIN, J ^{[1
]}

机构：

[1] UNIV COLORADO,DEPT APAS,BOULDER,CO 80309

来源：

ASTROPHYSICAL JOURNAL | 1993年 / 412卷 / 02期

关键词：

BL LACERTAE OBJECTS; GENERAL; GALAXIES; ACTIVE; NUCLEI; METHODS; OBSERVATIONAL; X-RAYS; SURVEYS;

D O I：

10.1086/172942

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the recent discovery of 10 BL Lac objects in the Einstein IPC Slew Survey by means of X-ray/radio versus X-ray/optical color-color diagrams and confirming optical spectroscopy. These 10 BL Lac objects were discovered using a technique proposed by Stocke et al. which exploits the characteristic broad-band spectra of BL Lac objects. New VLA detections provide accurate fluxes [limiting f(6 cm) approximately 0.5 mJy] and approximately 1'' positions, facilitating the determination of an optical counterpart. All 10 new BL Lac objects show essentially featureless optical spectra and lie within the range of radio/X-ray/optical colors of known X-ray-selected BL Lac objects, when approximately 1 mag optical variability is included. We expect approximately 50 new BL Lac objects in total, from complete optical follow-up of our now completed VLA work and recent Australia Telescope observations, yielding a complete Slew Survey sample of approximately 90 BL Lac objects.

引用

页码：541 / 549

页数：9

共 26 条

[1] THE UNIVERSE AT FAINT MAGNITUDES .1. MODELS FOR THE GALAXY AND THE PREDICTED STAR COUNTS [J].