The quiescent corona of VB 10

We present results from a Chandra ACIS observation of the M8 dwarf star VB 10, a star near the hydrogen-burning mass limit. Until now, VB 10 has only been detected to. are at X-ray wavelengths. We can now report that non. are, quiescent,'' X-ray emission has been detected with a luminosity, L-X = (2.4 +/- 0.05) x 10(25) ergs s(-1) and log(L-X/L-bol) = -4.9. This is consistent with the previous ROSAT nondetections of quiescent emission from VB 10. We discuss the implications of this discovery for the nature of coronae in ultracool dwarfs.