SIMBAD references

Gould & DePoy proposed a pixel-lensing survey toward the Galactic bulge using a small aperture (∼65 mm) camera with a large pixel-size (∼10") detector and deliberately degraded optics, achieving a 30" point-spread function. In this paper, we estimate the event rate of this pixel-lensing survey expected under various detection criteria, which are characterized by the threshold signal-to-noise ratio (S/N)_th and event duration t_dur,th, and we investigate the characteristics of the detectable events. From this investigation, we find that the event rate varies significantly in the ∼6-120 yr^–1 range, depending strongly on the imposed detection criteria, implying that to maximize event detections, it will be essential to identify events by diligently inspecting light variations and promptly conducting follow-up observations for the identified events. Compared to events detectable from classic lensing surveys, the events detectable from the pixel-lensing survey will generally involve brighter source stars and have higher amplifications. For the pixel-lensing events detectable under the criteria of (S/N)_th=10 and t_dur,th=6 hr, we find that the baseline brightness of source stars will be on average ∼2 mag brighter than those of classic lensing events, that ∼90% will have amplifications A≥20, and that ∼40% will be extreme microlensing events (EMEs) with A≥200. Therefore, follow-up observations of the pixel-lensing events will provide high-quality data, which enable one to determine precisely the lensing parameters and to obtain extra information about the lenses and source stars. High-amplification events with A≥20 especially will be important targets for high-efficiency planet detections, and one can uniquely determine the mass, distance, and transverse speed of individual lenses for EMEs.