4 papers
A Brown Dwarf Microlens Candidate in the OGLE-II Database
M. C. Smith, S. Mao, P. R. Wozniak
We describe a unique mass determination for a microlensing event from the second phase of the Optical Gravitational Microlensing Experiment (OGLE-II). The event, sc26_2218, which i…
Detecting Luminous Gravitational Microlenses Using Spectroscopy
S. Mao, J. Reetz, D. L. Lennon
We propose a new method to detect the gravitational lenses in the ongoing microlensing experiments using medium and high resolution spectroscopy (resolution > 6000). Since the radi…
Real-Time Spectroscopy of Gravitational Microlensing Events - Probing the Evolution of the Galactic Bulge
D. Lennon, S. Mao, J. Reetz +3
We describe a real-time spectroscopic program to observe bright gravitational microlensing events toward the Galactic Bulge. The program is carried out using the NTT at ESO. We pre…
Object DUO 2: A New Binary Lens Candidate
C. Alard, S. Mao, J. Guibert
We present the light curve of an unusual variable object, DUO 2, detected during the search for microlensing events by the DUO project. The star remained stable for more than 150 d…