With Very Large Telescope (VLT) Multi Unit Spectroscopic Explorer (MUSE) observations, we detected highly variable helium emission lines from the optical counterpart of supersoft ultraluminous X-ray source (ULX) NGC 247 ULX-1. No Balmer can be seen in spectrum. This is first evidence for presence a donor star ULXs, consistent with prediction that stars may popular ULXs. The FWHM about 200 km/s ...

ABSTRACT We present an innovative and widely applicable approach for the detection classification of stellar clusters, developed PHANGS-HST Treasury Program, NUV-to-I band imaging campaign 38 spiral galaxies. Our pipeline first generates a unified master source list stars candidate to enable self-consistent inventory all star formation products. To distinguish cluster candidates from stars, we ...

The X-ray transient 4U 1730 22 has not been detected in outburst since 1972, when a single 200 day outburst was detected by the Uhuru satellite. This neutron star or black hole X-ray binary is presumably in quiescence now, and here we report on X-ray and optical observations of the 4U 1730 22 field designed to identify the system’s quiescent counterpart. Using the Chandra X-ray Observatory, we ...

This paper presents a satellite tracking method based on optical celestial images. The proposed method is composed of two acquiring modes that are called Sidereal Stare Mode (SSM) and Track Rate Mode (TRM). To track the unknown satellites, first of all the entire of the sky is observed and the primary knowledge of the satellite location is predicted in SSM. Then, the measured pointing data is c...

Multiwavelength observations may help us understand the physical nature of the ultraluminous X-ray sources (ULXs) found in external galaxies. Enabled by the arcsecond X-ray source positions now available from Chandra, there has been significant recent progress in the identification of optical and radio counterparts to ULXs. Recent results are reviewed on the identification of optical stellar co...

This manuscript describes the identification of an oseltamivir-resistant influenza A (H3N2) virus in a respiratory specimen collected from an immunocompromised patient in Alberta, Canada, during the 2014-2015 influenza season. Following treatment with oseltamivir, neuraminidase (NA) gene sequencing indicated the presence of an R292K mutation. Phenotypic susceptibility testing by the NA-Star ass...

in recent years, researchers have become interested in examining the effect of pettlep imagery on motor performance and how pettlep imagery can improve the performance. the aim of this study was to compare the effect of pettlep imagery and balance practice on dynamic balance in the elderly. participants were 42 male elderly in arak city. they were divided into 4 groups based on the scores of dy...