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We present a catalogue of variable stars in the near-infrared wavelengthdetected with overlapping regions of the 2MASS public images, and discuss theirproperties. The investigated region is in the direction of the Galactic center(-30 < l < 20, |b| < 20), which covers the entire bulge. We have detected 136variable stars, of which 6 are already-known and 118 are distributed in |b| < 5region. Additionally, 84 variable stars have optical counterparts in DSSimages. The three diagrams (colour-magnitude, light variance and colour-colourdiagrams) indicate that most of the detected variable stars should belargeamplitude and long-period variables such as Mira variables or OH/IR stars.The number density distribution of the detected variable stars implies thatthey trace the bar structure of the Galactic bulge.

Properties of Large-Amplitude Variable Stars Detected With Two Micron All Sky Survey Public Images