KS 1730-312

K. Borozdin, N. Alexandrovich and R. Sunyaev, Space Research Institute, Moscow, on behalf of the MIR-KVANT team, report: "This x-ray transient (cf. IAUC 6083) continues to increase in luminosity in the standard x-ray spectral band. According to data obtained on Sept. 26 with the MIR-KVANT-TTM coded-mask instrument, the spectrum can be approximated by a power law with photon index 2.7 +/- 0.2 and column density NH = 4 x 10**22 cm-2. The flux at 4 keV was about 600 mCrab. An even higher flux (850 mCrab at 4 keV) and softer spectrum were detected on Sept. 28, when the power-law index was 4.2 +/- 0.2 and NH = 8 x 10**22 cm-2. Possibly this is another x-ray nova."