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Observational techniques meeting #8

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.

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Observational techniques meeting #8

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  1. Observational techniquesmeeting #8

  2. Filter systems

  3. Johnson system

  4. SDSS system (Gunn filters)

  5. IR filters

  6. Narrow-band filters

  7. More… >215 systems …

  8. Spectrographs

  9. Dispersive elements: prism High throughput; low resolution; wavelength-dependant dispersionR=t dn/dλ

  10. Dispersive elements:diffraction grating R = m L k

  11. Dispersive elements:grism

  12. Dispersive elements:reflection grating

  13. Cross-dispersed echelle

  14. Slitless spectroscopy

  15. Spectrograph

  16. Multislit masks Multiplexing Fiber spectrographs

  17. LAMOST 3.5-4.9m mirror 4000 fibers 16 spectrographs Xinglong station

  18. End

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