Hubble Catalog of Variables
  The Hubble Catalog of Variables (HCV) project aims to identify the variable
sources in the Hubble Source Catalog (HSC), which includes about 92 million
objects with over 300 million measurements detected by the WFPC2, ACS and WFC3
cameras on board of the Hubble Space Telescope (HST), by using an automated
pipeline containing a set of detection and validation algorithms. All the HSC
sources with more than a predefined number of measurements in a single
filter/instrument combination are pre-processed to correct systematic effect
and to remove the bad measurements. The corrected data are used to compute a
number of variability indexes to determine the variability status of each
source. The final variable source catalog will contain variables stars, active
galactic nuclei (AGNs), supernovae (SNs) or even new types of variables,
reaching an unprecedented depth (V$\leq$27 mag). At the end of the project, the
first release of the HCV will be available at the Mikulski Archive for Space
Telescopes (MAST) and the ESA Hubble Science Archives. The HCV pipeline will be
deployed at the Space Telescope Science Institute (STScI) so that an updated
HCV may be generated following future releases of HSC.
