The First Data Release of LAMOST Low Resolution Single Epoch Spectra
Publish Time:2021-06-01
LAMOST Data Release 5, covering ∼17,000 sq. deg from −10 to 80 deg in declination, contains 9 millions co-added low resolution spectra of celestial objects, each spectrum combined from repeat exposure of two to tens of times during Oct 2011 to Jun 2017. In this data release, the spectra of individual exposures for all the objects in LAMOST Data Release 5 are presented. For each spectrum, equivalent width of 60 lines from 11 different elements are calculated with a new method combining the actual line core and fitted line wings. For stars earlier than F type, the Balmer lines are fitted with both emission and absorption profiles once two components are detected. Radial velocity of each individual exposure is measured by minimizing χ2 between the spectrum and its best template. Database for equivalent widths of spectral lines and radial velocities of individual spectra are available online. For stars observed in the same day and with signal-to-noise ratio higher than 20, the radial velocity uncertainty is below 5km/s, and increase to 10km/s for stars observed in different nights.
· Data Access ·
♦Introduction♦
Keywords
LAMOST , LSR , spectrum , single-epoch
Sharing Method
Sharing Scope
DOI
CSTR
VO Identifier
Ivo://China-VO/data/LAMOST/LSR/single-epoch-spectra/DR1
♦Contact Author♦
Author
LAMOST Operation and Development Center
Email
support(at)lamost.org
♦Contact Publisher
♦
Email
support(at)china-vo.org
Phone
+86-10-64807973
Institution
National Astronomical Data Center
♦Tags♦
waveband
Optical
telescope or project
Large Sky Area Multi-Object Fiber Spectroscopic Telescope（LAMOST）
subject
Star and Interstellar Matter
data type
Spectrum Data
Catalog Data
production age
1980-
content level
Research