The Ongoing Importance of Followup Observations

Jennifer Yee

Unique Advantages

• No set observing strategyCan choose targets, cadence, bands

• More sites better longitudinal coverage

OGLE

MOA

Wise

OGLE

MOA

Wise

OGLE

CTIO

FCOAOMAOKumeu

VLO

MOA

PossumTuritea

PESTCraigie

KKO

WiseWeizmann

IAC80

OPD

Science Opportunities

• High-magnification Events– Dense observations– Terrestrial parallax

• Events early and late in the season• Events in low-cadence fields• Multi-band information (particularly IR)

5988 5990 5992 5994

OGLE-2012-BLG-0026

Han et al., 2013, ApJL

Detection Threshold

Beaulieu et al. 2006, Nature, 439, 437Yee et al. 2012, ApJ, 755, 102

MOA-2011-BLG-293 OGLE-2005-BLG-390

Dong et al. 2009

MOA-2007-BLG-400

OGLE-2007-BLG-224

MOA-2010-BLG-523

Gould et al. 2013 ApJ

MOA-2008-BLG-310

Science Opportunities

• High-magnification Events– Dense observations– Terrestrial parallax

• Events early and late in the season• Events in low-cadence fields• Multi-band information (particularly IR)