Spectroscopy and Spectral Analysis, Volume. 34, Issue 11, 3132(2014)
The Backgroud Sky Subtraction Around [OIII] Line in LAMOST QSO Spectra
At present, most sky-subtraction methods focus on the full spectrum, not the particular location, especially for the backgroud sky around [OIII] line which is very important to low redshift quasars. A new method to precisely subtract sky lines in local region is proposed in the present paper, which sloves the problem that the width of Hβ-[OIII] line is effected by the backgroud sky subtraction. The exprimental results show that, for different redshift quasars, the spectral quality has been significantly improved using our method relative to the original batch program by LAMOST. It provides a complementary solution for the small part of LAMOST spectra which are not well handled by LAMOST 2D pipeline. Meanwhile, This method has been used in searching for candidates of double-peaked Active Galactic Nuclei.
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SHI Zhi-xin, Georges Comte, LUO A-li, TU Liang-ping, ZHAO Yong-heng, WU Fu-chao. The Backgroud Sky Subtraction Around [OIII] Line in LAMOST QSO Spectra[J]. Spectroscopy and Spectral Analysis, 2014, 34(11): 3132
Received: Nov. 12, 2013
Accepted: --
Published Online: Dec. 8, 2014
The Author Email: Zhi-xin SHI (zxshi@nlpr.ia.ac.cn)