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Simulation of a star being disrupted by a supermassive black hole during a tidal disruption event. [1] A tidal disruption event (TDE) is a transient astronomical source produced when a star passes so close to a supermassive black hole (SMBH) that it is pulled apart by the black hole's tidal force. [2] [3] The star undergoes spaghettification ...
Neil Gehrels Swift Observatory, previously called the Swift Gamma-Ray Burst Explorer, is a NASA three-telescope space observatory for studying gamma-ray bursts (GRBs) and monitoring the afterglow in X-ray, and UV/Visible light at the location of a burst. [ 5] It was launched on 20 November 2004, aboard a Delta II launch vehicle. [ 4]
Image stabilization (IS) is a family of techniques that reduce blurring associated with the motion of a camera or other imaging device during exposure.. Generally, it compensates for pan and tilt (angular movement, equivalent to yaw and pitch) of the imaging device, though electronic image stabilization can also compensate for rotation about the optical axis ().
The Ultraviolet and Optical Telescope (UVOT) is one of three instruments on board the Neil Gehrels Swift Observatory that observes astronomical objects in its 17-by-17 arc minute field of view through one of several filters or grisms. The seven filters, which are similar to those on the XMM-Newton Optical Monitor instrument, cover the near ...
The line-spread function is directly proportional to the vertical integration of the point-spread image. The optical-transfer function (OTF) is defined as the Fourier transform of the point-spread function and is thus generally a two-dimensional complex function. Typically only a one-dimensional slice is shown (c), corresponding to the Fourier ...
The Strehl ratio is a measure of the quality of optical image formation, originally proposed by Karl Strehl, after whom the term is named. [1] [2] Used variously in situations where optical resolution is compromised due to lens aberrations or due to imaging through the turbulent atmosphere, the Strehl ratio has a value between 0 and 1, with a hypothetical, perfectly unaberrated optical system ...
Swift Current. / 50.28806°N 107.79389°W / 50.28806; -107.79389. Swift Current is the sixth-largest city in the Canadian province of Saskatchewan. It is situated along the Trans Canada Highway 177 kilometres (110 mi) west of Moose Jaw, and 223 kilometres (139 mi) east of Medicine Hat, Alberta.
Velocity of the fast stellar wind is about 1900 km/s, where spectroscopic analysis shows the current rate of mass loss averages 3.2 × 10 −7 solar masses per year, equivalent to twenty trillion tons per second (20 Eg/s). [6] An optical image of the nebula's surrounding halo