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| Paper: |
A Toolkit for Eye Recognition of LAMOST Spectroscopy |
| Volume: |
485, Astronomical Data Analysis Software and Systems XXIII |
| Page: |
455 |
| Authors: |
Yuan, H.; Zhang, H.; Zhang, Y.; Lei, Y.; Dong, Y.; Zhao, Y. |
| Abstract: |
The Large sky Area Multi-Object fiber Spectroscopic Telescope (LAMOST,
also named the Guo Shou Jing Telescope) has finished the pilot survey
and now begun the normal survey by the end of 2012 September. There have
already been millions of targets observed, including thousands of quasar
candidates. Because of the difficulty in the automatic identification
of quasar spectra, eye recognition is always necessary and
efficient. However massive spectra identification by eye is a huge
job. In order to improve the efficiency and effectiveness of spectra
, a toolkit for eye recognition of LAMOST spectroscopy is
developed. Spectral cross-correlation templates from the Sloan Digital
Sky Survey (SDSS) are applied as references, including O star, O/B
transition star, B star, A star, F/A transition star, F star, G star, K
star, M1 star, M3 star,M5 star,M8 star, L1 star, magnetic white dwarf,
carbon star, white dwarf, B white dwarf, low metallicity K sub-dwarf,
"Early-type" galaxy, galaxy, "Later-type" galaxy, Luminous Red Galaxy,
QSO, QSO with some BAL activity and High-luminosity QSO. By adjusting
the redshift and flux ratio of the template spectra in an interactive
graphic interface, the spectral type of the target can be discriminated
in a easy and feasible way and the redshift is estimated at the same
time with a precision of about millesimal. The advantage of the tool in
dealing with low quality spectra is indicated. Spectra from the Pilot
Survey of LAMSOT are applied as examples and spectra from SDSS are also
tested from comparison. Target spectra in both image format and fits
format are supported. For convenience several spectra accessing manners
are provided. All the spectra from LAMOST pilot survey can be located
and acquired via the VOTable files on the internet as suggested by International Virtual Observatory Alliance (IVOA). After the
construction of the Simple Spectral Access Protocol (SSAP) service by
the Chinese Astronomical Data Center (CAsDC), spectra can be obtained
and analyzed in a more efficient way. |
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