The Amateur Astronomer's Library

The article can be found here -
http://arxiv.org/abs/0707.4473

Key features of this article.
1) The SDSS colour stellar locus is presented in a number of colour/colour diagrams
2) The effect of unresolved multiple stars is discussed. I think that this has been underestimated by other researchers.
3) Colours as a function of spectral type

OVERALL SCORE - Five stars

The article can be accessed from here -
http://arxiv.org/abs/1009.1158

Key features of the article.
1) Flares are far more common in late dwarf stars than in early dwarf (0.02% v 3%)
2) Flares are also more common in stars near the galactic plane, that is in younger stars.

OVERALL SCORE - 1 star

The article can be accessed from here -
http://arxiv.org/abs/1001.3402

Key features of this article.
1) Equations for calculating the absolute magnitude (Mi) using either (i-z)or (i-J) colours are given.
2) There are a number of colour/colour diagrams that separate early L from late L from T stars.
3) There are also tables of median colours for L and T dwarfs using various colour combinations.

OVERALL SCORE - Five Stars

The Vizier version can be accessed from here -
http://cdsarc.u-strasbg.fr/viz-bin/VizieR?-source=J/AJ/143/67

The supporting article can be accessed from here (free) -
http://iopscience.iop.org/1538-3881/143/3/67/

Key features of this article.
1) SDSS u band can be used from 12.0 to 22.0
2) SDSS g band can be used from 14.1 to 22.2
3) SDSS r band can be used from 14.1 to 22.2
4) SDSS i band can be used from 13.8 to 21.3
5) SDSS z band can be used from 12.3 to 20.5

6) When combining photometry with proper motion use r<20

7) Equations are provided linking the SDSS(r-z) colour to the absolute magnitude Mr, the mass and to the spectral class of a star.

8) The colour/colour diagrams show how the various types of star can be distinguished.

OVERALL SCORE - Five Stars