Gravitational Microlensing Events

Gravitational Microlensing

EventsDiane FeuilletKailash Sahu

Tracking High Proper Motion Stars to Predict Possible Microlensing Events

Fitting Light Curves of Long-Duration Binary Events

Derived the Mass Function of Observed Events From the Timescales

ARIES Images-2402009

Poss 1 blue 1955

Poss 2 blue 1997

Poss 2 blue 1997

7

1

23 4

5

6

ARIES Images-2402009

5

4

3

6

7

21

7

1

45

6

Poss 2 blue 1997

32

ARIES Images-2402009

7

65

4321

7

1

45

6 32

Poss 2 blue 1997

6

3 4

5

1

7

2

Y po

sition

x position

600

400

400 600

1

2

D = 0.400 arcsec

T = 2/1/2012

Y po

sition

x position

510

505

515

440 445 450

Te = 141 days

1999-19Te1 = 60 daysTe2 = 120 days I mag = 15.9

HJD - 2450000

Ampl

itude 1

HJD - 24500001300 1700

2006-393Te1 = 90 daysTe2 = 74 daysI mag = 14.9

Te = 207 days

Ampl

itude

HJD - 2450000

0.5

0 3900 4200

2008-143Te1 = 40 daysTe2 = 35 days I mag = 17.6

Possible Black

Holes?

Ampl

itude

HJD - 2450000

1

0.5

4500 4800

2002-051Te1 = 8 daysTe2 = 12 days Te3 = 20 days I mag = 17.8

Three body systems

Ampl

itud

e

HJD - 2450000

4

3

2

1

02250 2400

Te = 139 days

2003-095Te1 = 26 daysTe2 = 26 daysTe3 = 15 daysI mag = 15.6

Ampl

itude

1

0.5

HJD - 24500002800 32000

2004-039Te1 = 22 daysTe2 = 1 days I mag = 17.3

2003-056Te1 = 15 daysTe2 = 20 days I mag = 16.8

Some do notfit well

Ampl

itude

1

2

3060 3100HJD - 2450000Am

plitu

de

1

HJD - 24500002650 2800

0

0