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Gamma-Ray Bursts
The discovery of optical counterparts to gamma-ray bursts has opened a new chapter in this emerging field of astrophysics. Here you can look at an HST images of the optical counterparts of gamma-ray bursts and their host galaxies. Among these are images of GRB 990123, a burst which reached an apparent visual magnitude of V=9 (bright enough to be observed with a pair of binoculars), yet was at a distance of some 10 billion light years.
Radio Pulsars
You can examine a paper on PSR B1957+20 , the black widow pulsar, or look at a virtual poster paper on the the nebula about the nearest millisecond pulsar, PSR J0437-4715.
WFPC2 and Dithering Strategies
The pixels of the WFPC 2 undersample the point spread function (PSF) of the Hubble Space Telescope and WFPC2 optics. Therefore, substantial information on the fine scale structure of objects can be obtained by offsetting the pointing of the telescope between exposures and then combining these "dithered" exposures into a single image. An introduction to the processing dithered exposures, as well as links to other Web pages on dithering can be found on my dithering page.
研究兴趣
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arxiv(2023)
The Astrophysical Journalno. 2 (2019): 1-13
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