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Optical Follow-Up Observations of ASCA Lynx Deep Survey

Published online by Cambridge University Press:  25 May 2016

K. Ohta ,
M. Akiyama ,
K. Nakanishi ,
T. Yamada ,
K. Hayashida ,
T. Kii  and
Y. Ogasaka
K. Ohta
Affiliation:
Dept. Astronomy, Kyoto Univ., Kyoto 606-01, Japan
M. Akiyama
Affiliation:
Dept. Astronomy, Kyoto Univ., Kyoto 606-01, Japan
K. Nakanishi
Affiliation:
Dept. Astronomy, Kyoto Univ., Kyoto 606-01, Japan
T. Yamada
Affiliation:
Astronomical Institute, Tohoku Univ., Sendai 980-77, Japan
K. Hayashida
Affiliation:
Dept. Earth and Space Science, Osaka Univ., Osaka 560, Japan
T. Kii
Affiliation:
Institute of Space and Astronautical Science, Kanagawa 229, Japan
Y. Ogasaka
Affiliation:
NASA/GSFC, Greenbelt, MD 20771, USA

Extract

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Since the bulk of the energy density of the Cosmic X-ray Background (CXB) resides in the harder energy band than that of the ROSAT band (0.5-2 keV) and since the X-ray sources identified in the ROSAT band have X-ray spectra softer than that of the CXB, investigation of nature of the X-ray sources at the harder energy band is indispensable to solve the origin of the CXB. However, only 2-3% of the CXB in the hard band (2-10 keV) had been resolved into discrete sources (Piccinotti et al. 1982, ApJ 253, 485). We present our preliminary results of optical follow-up observations of the ASCA Lynx deep survey.

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. 471 - 472
Copyright
Copyright © Kluwer 1998