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We present differential Strömgren uvby Four College Automated Photometric Telescope (FCAPT) observations of five supergiants with spectral types near A0. For three stars we supplemented our new data with our earlier published data, and for two more stars we present new data. We used two computer programs Period04 and VStar in attempts to determine if significant periodicities are present. Some periods...
Data traffic is produced almost continuously, but at low message rates (one message every -20 seconds) and data rates (a few hundred bit/s). In the investigated beam configurations the Iris systems has to support an average data rate between 2 and 4 Mbit/s per beam on the FL and approximately 0.5 Mbit/s per beam on the RL. In total the Iris system need not support more than 4 Mbit/s on the FLand 1...
We investigate the relation between the pulse and orbital periods in high-mass X-ray binaries (HMXBs), in order to find the candidates of magnetar descendants in HMXBs. We suggest that magnetar descendants can be found among the HMXBs with relatively shorter orbital periods and longer pulse periods.
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