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A catalog containing milliarcsecond–accurate positions of 1332 extragalactic radio sources distributed over the northern sky is presented – the Very Long Baseline Array Calibrator Survey (VCS1). The positions have been derived from astrometric analysis of dual–frequency 2.3 and 8.4 GHz VLBA snapshot observations ; in a majority of cases, images of the(More)
A novel method based on continuous wavelet transform (CWT) was proposed as a preprocessing tool for the near-infrared (NIR) spectra. Due to the property of the vanishing moments of the wavelet, the fluctuating background of the NIR spectra can be successfully removed through convolution of the spectra with an appropriate wavelet function. The vanishing(More)
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