1. Spatially Resolved Spectroscopy ASTR 3010 Lecture 17 Textbook Ch. 11

2. Atmospheric Differential Refraction

3. Slit orientation to horizon If the slit is not oriented perpendicular to the horizon, there will be a severe slit loss More seriously, the spectral shape will be systematically distorted!

4. Longslit spectrscopy Simplest. Simplest. Used a lot in the past. Used a lot in the past. Long time to make a 2D map. Long time to make a 2D map.

6. Keck ESI IFU : Image slicing… Keck ESI IFU : Image slicing…

7. GMOS IFU Fiber fed spectrograph Fiber fed spectrograph

8. Multi-slit Spectrograph GMOS (Gemini Multi-Object Spectrograph) GMOS (Gemini Multi-Object Spectrograph) mask slit (hundreds possible) + grating mask slit (hundreds possible) + grating

9. multi-Object Spectrgraph 6dF (6 degree Field) : Anglo Australian Observatory (on 4m or 1m UKST) 6dF (6 degree Field) : Anglo Australian Observatory (on 4m or 1m UKST) fibre based. About 150 objects can be observed spectroscopically in a single shot. fibre based. About 150 objects can be observed spectroscopically in a single shot.

10. 6dF Fibre positioning in action (takes about 30 min to configure).

11. 6dF 2dF at the Prime focus of 4m AAT telescope.

12. IFU science Keplerian rotating Keplerian rotating young disk young disk

13. IFY science : beating the sky Night sky OH line emissions Night sky OH line emissions

14. Speckle Suppresion GPI: R~45 IFU GPI: R~45 IFU

15. In summary… Important Concepts Slit orientation 2D spectroscopy o Multi-object spectrograph o Integral Field Spectrograph Important Terms Chapter/sections covered in this lecture : Ch 11