Statistical Improvement in Detection Level of Gravitational Microlensing Events from their Light Curves

  title={Statistical Improvement in Detection Level of Gravitational Microlensing Events from their Light Curves},
  author={Ichsan Ibrahim and Hakim L. Malasan and Chatief Kunjaya and Anton T. Jaelani and Gerhana Puannandra Putri and Mitra Djamal},
  journal={arXiv: Instrumentation and Methods for Astrophysics},
In Astronomy, the brightness of a source is typically expressed in terms of magnitude. Conventionally, the magnitude is defined by the logarithm of the received flux. This relationship is known as the Pogson formula. For received flux with a small signal to noise ratio (S/N), however, the formula gives a large magnitude error. We investigate whether the use of Inverse Hyperbolic Sine function (after this referred to as the Asinh magnitude) in the modified formulae could allow for an alternative… 


In Astronomy, intensity of the source light is expressed in magnitude. Conventionally, magnitude is defined by logarithmic function of the received flux. This relationship is known as Pogson
A modified magnitude system that produces well-behaved magnitudes, colors, and errors even for low signal-to-noise ratio measurements
We describe a modification of the usual definition of astronomical magnitudes, replacing the usual logarithm with an inverse hyperbolic sine function; we call these modified magnitudes asinh
The Optical Gravitational Lensing Experiment. The Optical Depth to Gravitational Microlensing in the Direction of the Galactic Bulge
We present the analysis of the first two years of the OGLE search for gravitational lenses towards the Galactic bulge. We detected 9 microlensing events in an algorithmic search of $ \sim 10^8 $
OGLE-IV: Fourth Phase of the Optical Gravitational Lensing Experiment
We present both the technical overview and main science drivers of the fourth phase of the Optical Gravitational Lensing Experiment (hereafter OGLE-IV). OGLE-IV is currently one of the largest sky
Gravitational microlensing by the galactic halo
A simple model of microlensing by massive objects that might be present in the halo of the Galaxy is presented. It is shown that in any nearby galaxy one star out of a million is strongly microlensed
The Sloan Digital Sky Survey: Technical summary
The Sloan Digital Sky Survey (SDSS) will provide the data to support detailed investigations of the distribution of luminous and nonluminous matter in the universe: a photometrically and
Gravitational Lenses, Berlin:Springer-Verlag
  • Manchester Microlensing Conference and Microlensing Workshop,
  • 2006