The solar active region NOAA 11158 produced a series of flares during its passage through the solar disk.The first major flare(of class X2.2) of the current sol
In January, 2008 the Chinese Small Telescope ARray (CSTAR) was suc-cessfully deployed at Dome A, Antarctica. Because CSTAR consists of four static14.5 cm telescop
The brightest optical flash from a γ-ray burst (GRB) was, briefly, a naked- eye object. Several other GRBs have produced optical transients only slightly faint
We investigated the environment of the infrared dust bubble N68 and searched for evidence of triggered star formation in its surroundings.We performed a multiwa
Time-series photometric observations were made for the high amplitudeδScuti star CW Ser between 2011 and 2012 at the Xinglong Station of National Astronomical