Chang, Y. -L.Y. -L.ChangArsioli, B.B.ArsioliGiommi, P.P.GiommiPadovani, P.P.Padovani2020-09-172020-09-172016-08-01https://hdl.handle.net/20.500.13025/4902Active Galactic Nuclei what's in a name? Proceedings of a conference held 27 June - 1 July, 2016 in Garching, id.37High Synchrotron Peaked Blazars (HSPs) are extremely important for VHE astronomy. We built the largest existing catalog of High Synchrotron Blazars (2WHSP) based on multi-frequency data. The catalog is an extension of the 1WHSP list. We compared several general properties of HSPs such as the synchrotron peak, the redshift and IR the color-color diagram. We also built the logN-logS for the sources, trying to see the evolution and the deficiency of the catalog. The catalog will provide a unique sample of targets for VHE observations in future since the HSPs are the dominant extra-Galactic sources in VHE sky. This might help find more VHE sources later. In the future, we will use this catalog to estimate other VHE properties of HSPs.Active Galactic Nucleiconference paper10.5281/zenodo.60451http://adsabs.harvard.edu/abs/2016agnw.confE..37C2016agnw.confE..37C