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Optical Follow-Up Observations of the ASCA Large Sky Survey

Published online by Cambridge University Press:  25 May 2016

M. Akiyama ,
K. Ohta ,
T. Yamada ,
Y. Ueda ,
T. Takahashi ,
M. Sakano ,
T. Tsuru  and
B. Boyle
M. Akiyama
Affiliation:
Department of Astronomy, Kyoto University Kyoto 606-01, Japan
K. Ohta
Affiliation:
Department of Astronomy, Kyoto University Kyoto 606-01, Japan
T. Yamada
Affiliation:
Astronomical Institute, Tohoku University, Japan
Y. Ueda
Affiliation:
Institute of Space and Astronautical Science, Japan
T. Takahashi
Affiliation:
Institute of Space and Astronautical Science, Japan
M. Sakano
Affiliation:
Department of Physics, Kyoto University, Japan
T. Tsuru
Affiliation:
Department of Physics, Kyoto University, Japan
B. Boyle
Affiliation:
Anglo-Australian Observatory, Australia

Extract

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To reveal the origin of the cosmic X-ray background (CXB) in the hard band, we are now conducting a wide (~ 7 deg2) and deep (~ 1 × 10−13 erg sec−1 cm−2 in the 2-10 keV band) survey with the ASCA (the ASCA Large Sky Survey, hereafter LSS). We have detected 83 sources above 4 sigma level in the 0.7-10 keV band with the GIS and resolved ~30% of the CXB in the 2-10 keV band into discrete sources (Ueda 1996). AGNs (type 1 and type 2) and clusters of galaxies are expected to be major contributers to these X-ray sources.

Type
Session 4: Large Scale Hot Plasmas and Their Relation with Dark Matter
Information
Symposium - International Astronomical Union , Volume 188: The Hot Universe , 1998 , pp. 465 - 466
Copyright
Copyright © Kluwer 1998 

References

Ishisaki, Y., 1996, , Google Scholar
McMahon, R., Irwin, M., 1992, in Digitized Optical Sky Survey, ed. MacGillivray, H.T. and Thomson, E.B. (Kluwer, Dordrecht). p.417 CrossRefGoogle Scholar
Ueda, Y., 1996, , Google Scholar