DATA ACCESS: http://lamost973.pku.edu.cn/site/data

 

Description of the first release of LSS-GAC value-added catalogues.

 

See Table6 of Yuan et al. 2015, MNRAS, 448, 855

http://adsabs.harvard.edu/abs/2015MNRAS.448..855Y

 

Col.

Name

Description

1

spec_id

LAMOST unique spectral ID, in format of date-plateid-spectrographid-fibreid

2

date

Date of observation

3

plate

LAMOST plate ID, not necessarily unique

4

sp_id

LAMOST spectrograph ID, ranging from 1 to 16

5

fibre_id

LAMOST fibre ID for a given spectrograph, ranging from 1 to 250

6

platetype

Plate type (`B', `M', `F' and `V')

7

objid

Object ID in the input catalogues

8

objtype

Initial object type from the survey input catalogues, could be stars (`star' and `Star'), emission line objects (`EMOs') and young stellar objects (`yso')

9

snr_b

S/N(4650A) per pixel

10

snr_r

S/N(7450A) per pixel

11

ra

Right Ascension of J2000.0 (deg)

12

dec

Declination of J2000.0 (deg)

13

l

Galactic longitude (deg)

14

b

Galactic latitude (deg)

15

uqflag

Uniqueness flag. If the target has been observed $n$ times, then uqflag runs from 1 to $n$, with 1 denoting the spectrum of the highest snr_b

16

vr

Radial velocity yielded by the LSP3, after corrected for a systematic offset of $-$3.5 kms~(kms)

17

teff1

Teff yielded by the LSP3 from the weighted mean algorithm (K)

18

logg1

Log g yielded by the LSP3 from the weighted mean algorithm (cm s$^{-2}$)

19

feh1

[Fe/H] yielded by the LSP3 from the weighted mean algorithm (dex)

20

teff2

Teff yielded by the LSP3 from the $chi^2$ minimization algorithm (K)

21

logg2

Logg yielded by the LSP3 from the $chi^2$ minimization algorithm (cm s$^{-2}$)

22

feh2

[Fe/H] yielded by the LSP3 from the $chi^2$ minimization algorithm (dex)

23

teff

Final teff~yielded by the LSP3 from the weighted mean algorithm, calibrated to photometric temperatures (K)

24

logg

Final logg~ yielded by the LSP3 from the weighted mean algorithm, same to logg1 in the current version (cm s$^{-2}$)

25

feh

Final feh~yielded by the LSP3 from the weighted mean algorithm, same to feh1 in the current version (dex)

26

vr_err

Error of radial velocity yielded by the LSP3 (kms)

27

teff_err

Error of the final teff~yielded by the LSP3 (K)

28

logg_err

Error of the final logg~yielded by the LSP3 (cm s$^{-2}$)

29

feh_err

Error of the final feh~yielded by the LSP3 (dex)

30

flags[9]

Flags assigned to the final LSP3 parameters (a)

31

fuv

GALEX $FUV$ band magnitude (mag) % $-$99.00 if null

32

nuv

GALEX $NUV$ band magnitude (mag)

33

g

XSTPS-GAC $g$ band magnitude (mag)

34

r

XSTPS-GAC $r$ band magnitude (mag)

35

i

XSTPS-GAC $i$ band magnitude (mag)

36

j

2MASS $J$ band magnitude (mag)

37

h

2MASS $H$ band magnitude (mag)

38

k

2MASS $K_{rm s}$ band magnitude (mag)

39

w1

WISE $W1$ band magnitude (mag)

40

w2

WISE $W2$ band magnitude (mag)

41

w3

WISE $W3$ band magnitude (mag)

42

w4

WISE $W4$ band magnitude (mag)

43

err_fuv

Error of the GALEX $FUV$ magnitude (mag) % $-$99.00 if null

44

err_nuv

Error of the GALEX $NUV$ magnitude (mag)

45

err_g

Error of the XSTPS-GAC $g$ band magnitude (mag)

46

err_r

Error of the XSTPS-GAC $r$ band magnitude (mag)

47

err_i

Error of the XSTPS-GAC $i$ band magnitude (mag)

48

err_j

Error of the 2MASS $J$ band magnitude (mag)

49

err_h

Error of the 2MASS $H$ band magnitude (mag)

50

err_k

Error of the 2MASS $K_{rm s}$ band magnitude (mag)

51

err_w1

Error of the WISE $W1$ band magnitude (mag)

52

err_w2

Error of the WISE $W2$ band magnitude (mag)

53

err_w3

Error of the WISE $W3$ band magnitude (mag)

54

err_w4

Error of the WISE $W4$ band magnitude (mag)

55

ph_qual_2mass

2MASS photometric quality flag (b)

56

ph_qual_wise

WISE photometric quality flag (c)

57

var_flg_wise

WISE variability flag$^c$

58

ext_flg_wise

WISE extended source flag$^c$

59

cc_flg_wise

WISE contamination and confusion flag$^c$

60

ebv_sfd

ebv~from the SFD extinction map (mag)

61

ebv_sp

ebv~ derived from the star pair method (mag)

62

ebv_mod

ebv~derived by comparing the observed and synthetic model atmosphere colours (mag)

63

ebv_phot

ebv~derived by fitting multi-band photometry to the empirical stellar loci (Chen et al. 2014) (mag)

64

dist_em

Distance derived using the empirical relations of absolute magnitudes as a function of stellar atmospheric parameters as yielded by the MILES stars except for RCs. Distances of RCs are derived assuming they are standard candles (kpc)

65

dist_mod

Distance derived from the theoretical isochrones of stellar models (kpc)

66

dist_phot

Distance derived from the photometric parallax method (Chen et al. 2014) (kpc)

67

pmra_ppmxl

Proper motion $mu_alphacosdelta$ in RA from the PPMXL catalogues (mas yr$^{-1}$)

68

pmdec_ppmxl

Proper motion $mu_delta$ in Dec from the PPMXL catalogues (mas yr$^{-1}$)

69

epmra_ppmxl

Proper motion error in RA from the PPMXL catalogues (mas yr$^{-1}$)

70

epmdec_ppmxl

Proper motion error in Dec from the PPMXL catalogues (mas yr$^{-1}$)

71

pmra_ppmxl_corr

Proper motion $mu_alphacosdelta$ in RA from the PPMXL catalogues after corrected for systematics using the formula of Carlin et al. (2013) (mas yr$^{-1}$)

72

pmdec_ppmxl_corr

Proper motion $mu_delta$ in Dec from the PPMXL catalogues after corrected for systematics using the formula of Carlin et al. (2013) (mas yr$^{-1}$)

73

pmra_ucac4

Proper motion $mu_alphacosdelta$ in RA from the UCAC4 catalogues (mas yr$^{-1}$)

74

pmdec_ucac4

Proper motion $mu_delta$ in Dec from the UCAC4 catalogues (mas yr$^{-1}$)

75

epmra_ucac4

Proper motion error in RA from the UCAC4 catalogues (mas yr$^{-1}$)

76

epmdec_ucac4

Proper motion error in Dec from the UCAC4 catalogues (mas yr$^{-1}$)

77

pmra_ucac4_corr

Proper motion $mu_alphacosdelta$ in RA from the UCAC4 catalogues after corrected for systematics using the formula of Huang et al. (2014) (mas yr$^{-1}$)

78

pmdec_ucac4_corr

Proper motion in $mu_delta$ in Dec from the UCAC4 catalogues after corrected for systematics using the formula of Huang et al. (2014) (mas yr$^{-1}$)

79

pmra_xuyi2mass

Proper motion $mu_alphacosdelta$ in RA derived by comparing the XSTPS-GAC and 2MASS positions (mas yr$^{-1}$)

80

pmdec_xuyi2mass

Proper motion $mu_delta$ in Dec derived by comparing the XSTPS-GAC and 2MASS positions (mas yr$^{-1}$)

81

x

x coordinate in a  Galactocentric Cartesian reference system, positive towards the Galactic centre (kpc)

82

y

y coordinate in a  Galactocentric Cartesian reference system, positive in the direction of disc rotation (kpc)

83

z

z coordinate in a  Galactocentric Cartesian reference system, positive towards the North Galactic Pole (kpc)

84

u[2]

Galactic space velocities in the x direction computed from dist_em and the corrected PPMXL and UCAC4 proper motions, respectively, positive towards the Galactic centre (km s$^{-1}$)

85

v[2]

Galactic space velocities in the y direction computed from dist_em and the corrected PPMXL and UCAC4 proper motions, respectively, positive in the direction of Galactic rotation (km s$^{-1}$)

86

w[2]

Galactic space velocities in the z direction computed from dist_em and the corrected PPMXL and UCAC4 proper motions, respectively, positive towards the North Galactic Pole (km s$^{-1}$)

87

v_r[2]

Galactic space velocities in the $r$ direction in a Galactocentric cylindrical polar coordinate system, computed from dist_em and the corrected PPMXL and UCAC4 proper motions, respectively (km s$^{-1}$)

88

v_phi[2]

Galactic space velocities in the $phi$ direction in a Galactocentric cylindrical polar coordinate system, computed from dist_em and the corrected PPMXL and UCAC4 proper motions, respectively, positive in the direction of counter disc rotation (km s$^{-1}$)

89

v_z[2]

Galactic space velocities in the $z$ direction in a Galactocentric cylindrical polar coordinate system, computed from dist_em and the corrected PPMXL and UCAC4 proper motions, respectively, positive towards the North Galactic Pole (km s$^{-1}$)

90

e[2]

Orbital eccentricities computed from dist_em and the corrected PPMXL and UCAC4 proper motions, respectively

91

Rapo[2]

Maximum Galactic radii reached by the orbits from dist_em and the corrected  PPMXL and UCAC4 proper motions, respectively (kpc)

92

Rperi[2]

Minimum Galactic radii reached by the orbits from dist_em and the corrected  PPMXL and UCAC4 proper motions, respectively (kpc)

93

Rg[2]

Galactic guiding radii from dist_em and the corrected  PPMXL and UCAC4 proper motions, respectively (kpc)

 

(a) See Table,2 of Xiang et al. (2015b). http://adsabs.harvard.edu/abs/2015MNRAS.448..822X

(b) See http:g/www.ipac.caltech.edu/2mass/releases/allsky/doc/sec1_6b.html#origphot.

(c) See http:g/wise2.ipac.caltech.edu/docs/release/allsky/expsup/sec2_2a.html#ext_flg.