Abstract We present detailed analyses of eight triple stellar systems (lying between 20 and 155 pc) nine quadruple 250 with different configurations. Most these are hierarchical. The HIP 4239, 5588, 11072, 12548, 13498, 17895, 19915, 22607, 25240, 28614, 41171, 51255, 51966, 54611, 78977, 89234, 111805. followed a method that can be applied to all multiple systems, including the main sequence s...

the fundamental natural frequency of vibration of an inflatable cantilever beam is computed from the system of the three equeations given for vibratory motion of the beam. the effect of various parameters is discussed, and it is shown that, as internal pressure increases, fundamental natural frequency will increase , indicating the stiffening characteristics of internal pressure. a single exper...

While X-ray emission from active galactic nuclei (AGN) is common, the detailed physics behind this not well understood. This in part because high quality broadband spectra are required to precisely derive fundamental parameters of such as photon index, folding energy, and reflection coefficient. Here we present values for 33 AGN observed 105 month Swift/BAT campaign with coordinated archival XM...