NLTE abundance corrections for five lines of Ba II in the MARCS model atmospheres.

NLTE method was treated by Mashonkina+ (1999, A&A, 343, 519) and updated by Mashonkina, Belyaev (2019, Astron. Letters, 45, 341), with including Ba II + H I collisions, as calculated by Belyaev, Yakovleva (2018, MNRAS, 478, 3952).

The Ba abundance was varied in the NLTE calculations.

Grid I was computed for
Teff = 5000 to 6500~K, with a 250 K step, 
log g = 3.0 to 5.0, with a 0.5 step, 
[Fe/H] = -2.0, -2.5, -3.0, -4.0
and
Teff = 5000, 5270, 5500
log g = 2.5
[Fe/H] = -2.0, -2.5, -3.0, -4.0
for four [Ba/Fe] values
The data are available in
ba2_dnlte_dwarf_m1.0n.dat includes data for [Ba/Fe] = -1.0,
ba2_dnlte_dwarf_m0.5n.dat includes data for [Ba/Fe] = -0.5,
ba2_dnlte_dwarf_p0.0n.dat includes data for [Ba/Fe] =  0.0,
ba2_dnlte_dwarf_p0.5n.dat includes data for [Ba/Fe] = +0.5.
Everywhere, xi_t = 1.5 km/s.

Grid II was computed for
Teff = 4000 to 4750 K, with a step of 250 K,
log g = 0.5 to 2.5, step 0.5,
[Fe/H] = -2.0 to -4.0, step 0.5,
and
Teff = 5000 K
log g = 0.5 to 2.5, step 0.5,
[Fe/H] = -2.0, -2.5, -3.0, -4.0 :
for five [Ba/Fe] values.
The data are available in
ba2_dnlte_giants_m1.5.dat includes data for [Ba/Fe] = -1.5,
ba2_dnlte_giants_m1.0.dat includes data for [Ba/Fe] = -1.0,
ba2_dnlte_giants_m0.5.dat includes data for [Ba/Fe] = -0.5,
ba2_dnlte_giants_p0.0.dat includes data for [Ba/Fe] =  0.0,
ba2_dnlte_giants_p0.5.dat includes data for [Ba/Fe] = +0.5.
Everywhere, xi_t = 2 km/s.

All the files have similar structure and include the NLTE equivalent widths (mA, 1st string for each metallicity) and abundance corrections (NLTE - LTE, dex, 2nd string). The NLTE corrections are provided for lines with EW(LTE) > 1 mA.

When using some of these data in your research, cite please 
Mashonkina, Belyaev (2019, Astron. Letters, 45, 341)
 and http://www.inasan.ru/~lima/pristine