... software

See http://www.astropa.unipa.it/progetti_ricerca/PWDetect/

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... ratios

We selected the energy bands used to compute these hardness ratios in such a way as to maximize the average observed source counts in each band. Since these bands are not identical to those used in previous works, the values of HR1, HR2 in Table 1 should not be directly compared to those reported elsewhere for stars of similar type.

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... excesses

In the (J-H,H-K) diagram of Fig. 3, a few other IR objects fall redward of the reddened main-sequence colors, but the deviation is not significant above $3\sigma$ according to published errors in the 2MASS photometry.

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... PIMMS

Portable Interactive Multi-Mission Simulator, http://asc.harvard.edu/toolkit/pimms.jsp

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