observational techniques meeting #8
DESCRIPTION
Observational techniques meeting #8. Filter systems. Johnson system . SDSS system (Gunn filters). IR filters. Narrow-band filters. More…. >215 systems …. Spectrographs. Dispersive elements: prism. High throughput; low resolution; wavelength-dependant dispersion R=t dn /d λ. - PowerPoint PPT PresentationTRANSCRIPT
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Observational techniquesmeeting #8
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Filter systems
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Johnson system
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SDSS system (Gunn filters)
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IR filters
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Narrow-band filters
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More…
>215 systems …
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Spectrographs
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Dispersive elements: prism
High throughput; low resolution; wavelength-dependant dispersionR=t dn/dλ
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Dispersive elements:diffraction grating
R = m L k
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Dispersive elements:grism
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Dispersive elements:reflection grating
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Cross-dispersed echelle
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Slitless spectroscopy
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Spectrograph
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MultiplexingMultislit masks
Fiber spectrographs
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LAMOST
3.5-4.9m mirror4000 fibers16 spectrographsXinglong station
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End