16th Microlensing Season of the Optical Gravitational Lensing Experiment
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1 16th Microlensing Season of the Optical Gravitational Lensing Experiment A. Udalski Warsaw University Observatory 1 OGLE: The Optical Gravitational Lensing Experiment ( ) 2
2 Three Phases of the OGLE Project OGLE-I ( ). 1 m Swope telescope at LCO. ~2 million stars observed. Microlensing OGLE-II ( ). 1.3 m Warsaw telescope. ~40 million stars observed. Variable and non-variable Stars in GB, MC OGLE-III (2001-.). 8k x 8k mosaic CCD. ~200 million stars observed (GB, GD, MC). Extrasolar Planets, Microlensing 3 Las Campanas Observatory, Chile 4
3 OGLE-I Results. Microlenses: Discovery of the first events toward the GB (1993). 5 First Binary Microlensing (1994) 6
4 Early Warning System (EWS 1994) 7 Microlensing Optical Depth: First empirical determination (1994):! = 3.3 x
5 OGLE-II ( ) New telescope new targets: Magellanic Clouds New CCD Camera drift scan mode ~40 million stars regularly observed Variable and non-variable Stars in GB, MC, gravitational micro and lensing Distance scale m Warsaw Telescope at LCO 10
6 Night at LCO 11 Cepheids in the MC. PL relations. Hubble constant is based on OGLE PL relations 12
7 Pulsating Red Giants 13 Eclipsing Stars (Good distance indicators) 14
8 Gravitational Lensing. The Einstein Cross. 15 Gravitational Lensing: HE
9 OGLE-III (2001- ) New 8192 x 8192 pixel mosaic CCD camera (0.26 arcsec/pixel scale): 0.5 x 0.5 sq. degree 1.3 m OGLE telescope at Las Campanas Observatory, Chile Data Pipeline: photometry derived with image subtraction method (accuracy up to 3 mmag for the brightest stars over a few months long observing run) OGLE back in operation on June 12, 2001 ~200 million stars regularly observed (GB, GD, MC) Extrasolar planets, low luminosity objects 17 Warsaw Telescope and 8192x8192 pixel Mosaic Camera 18
10 Typical OGLE-III Microlensing Season EWS Alert System: ~600 microlensing detections (~20 during OGLE-I all four seasons; ~60 per season in OGLE-II) EEWS Alert System: ~25 real time anomaly detections Several high magnification events, several binary microlensings ~<2-3 planetary microlensings 19 Planetary Microlensing Observing Strategy Detection of microlensing events in early phases by the large survey programs like OGLE or MOA Follow-up of the most promising events by followup programs like microfun, PLANET/ROBONET and survey programs in follow-up mode (OGLE, MOA) OGLE real time alert system (EEWS) detecting anomalies in the light curve of microlensing events (enabling fast switch to from survey to follow-up observing mode) 20
11 2007 Microlensing Season EWS Alert System: ~600 microlensing detections EEWS Alert System: ~20 real time anomaly detections Several high magnification events, several binary microlensings 21 Magellanic Cloud Microlensing 22
12 Fake early microlenses 23 Magellanic Clouds Microlensing OGLE-2007-LMC
13 Magellanic Clouds Microlensing OGLE-2008-SMC OGLE-2005-SMC
14 27 28
15 2007 Galactic Bulge Microlensing Season Season Microlensing OGLE-2007-BLG
16 2007 Microlensing Season: OGLE-2007-BLG Microlensing Season: Spectacular Event OGLE-2007-BLG
17 2007 Microlensing Season: OGLE-2007-BLG-368 Planetary microlensing Microlensing Season: OGLE-2007-BLG-349 Planetary microlensing 34
18 2007 Microlensing Season: OGLE-2007-BLG-472 Small q microlensing Microlensing Season: OGLE-2007-BLG-514 Planetary microlensing? 36
19 2007 Microlensing Season: MOA 2007-BLG-192 Planetary microlensing Microlensing Season: High Magnification Events 38
20 2007 Microlensing Season: Short time-scale microlensing t E =0.8 days t E =1.8 days 39 Gravitational Lensing Einstein Cross
21 Eleven Years Monitoring of the Einstein Cross 41 MISC 42
22 OGLE-TR-182 astro-ph/ P= days, Mp=1.01+/-0.15 M J, Rp= R J Typical hot Jupiter. 43 OGLE-TR-211 astro-ph/ P= days, Mp=1.03 +/ M J, Rp= R J Radius ~20% larger than that of typical hot Jupiter: another inflated hot Jupiter. 44
23 OGLE 2008 Plans Microlensing campaign 2007 setup New mosaic camera with larger field of view 45 OGLE-IV New OGLE Mosaic Camera 1.4 square degree field Contract with E2V signed 13 chips out of 34 already delivered Expected first light Early 2009 ~10 times larger data flow compared to OGLE-III 46
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