1. The KPNO 4m “Mayall” Telescope Arjun Dey (NOAO)

2. National Optical Astronomy Observatory Mission: provide the best ground-based astronomical capabilities to ALL astronomers promote public understanding and support of science help advance all aspects of US astronomy Peer-review access to current OIR facilities: KPNO, CTIO, Gemini Observatory Keck, Magellan, MMT, HET New Initiatives (future facilities): Large Synoptic Survey Telescope (NEO, SNe,etc.) Extremely Large Telescopes (e.g., GSMT) Arjun Dey

3. NOAO and its users NOAO is run by AURA under cooperative agreement with the NSF Peer-review merit-based access to all astronomers Open skies policy Community of users is very diverse (few night runs to surveys to large experiments) Current NSF context is the ReSTAR Report, but Decadal Survey can help here Arjun Dey

4. Kitt Peak National Observatory Arjun Dey

5. Kitt Peak National Observatory Founded 1958 Mayall 4m (1973) WIYN 3.5m (1994) 2.1m (1964) & many smaller telescopes Summit 6875ft Arjun Dey

6. The Mayall Ritchey-Chretien design Clear aperture of primary = 3.797m Two secondaries: f/7.8 and f/15 Prime focus corrector option (currently MOSAIC camera) Primary has active support Aging instrument complement – needs something new! New design options can result in >3 degree field http://www-kpno.kpno.noao.edu/kpno-misc/mayall_params.html Arjun Dey

7. The Mayall Telescope control system is old, but functional, and under computer control 4MAPS 33-pt active mirror support system Dome has had some seeing improvements done during the last decade Control room near telescope (should probably be moved) All observing is done “classically”, with observers at summit with telescope operator (but instruments have been run remotely from Tucson)

8. The Mayall in Context Arjun Dey About 10% of public access time now; less in future

9. Kitt Peak Weather Statistics Arjun Dey

10. Kitt Peak Weather Statistics Crawford 1983 Need to analyze more recent data – In progress! (But little has changed) Arjun Dey

11. Kitt Peak Weather Statistics http://www.wrcc.dri.edu/cgi-bin/cliMAIN.pl?azkitt

12. Seeing at the WIYN Telescope (same mountain, modern telescope) Aug 2004 – Apr 2006 Arjun Dey

13. Seeing at the Mayall Massey et al. 1999 Arjun Dey

14. September 07, 2007KPNO Weekly Project Meeting14 Kitt Peak Site Monitoring Suite Initial Instrument suite – Differential image motion monitor (DIMM) – KPNO All Sky Camera (KASCA) – Weather stations (WS, WD, RH, T, P) Data – Real time web page – Data archive(s) Match CTIO system From Bob Blum

15. September 07, 2007KPNO Weekly Project Meeting15 Kitt Peak Site Monitoring Suite DIMM – 10'' Meade LX200 – ST5 SBIG CCD – Two 9 cm pupil apertures, 15 cm apart – Image motion: achromatic, no filters – Almost operational … From Bob Blum

16. September 07, 2007KPNO Weekly Project Meeting16 Kitt Peak Site Monitoring Suite KASCA – Nikon fisheye – SBIG CCD – Blue, Red, Na filters – Web server – Image database – Admin roof From Bob Blum

17. Prime Focus Option 1 Designs by Ming Liang (NOAO) Arjun Dey

18. Prime Focus Option 3 Designs by Ming Liang (NOAO) Arjun Dey