Second data release of the Kepler-INT Survey
  This short document reports on the second data release of the Kepler-INT
Survey (KIS, Greiss et al. 2012). The Kepler field, a 116 sq.deg region of the
Cygnus and Lyra constellations, is the target of the most intensive search for
transiting planets to date. The Kepler mission provides superior time series
photometry, with an enormous impact on all areas of stellar variability. The
initial release catalogue (Greiss et al. 2012) concerned data taken between May
and August 2011, using the Isaac Newton Telescope on the island of La Palma.
Four broadband filters were used, U, g, r, i, as well as one narrowband one,
H-alpha, reaching down to a limit of ~20th mag in the Vega system. Observations
covering ~50 sq.deg passed our quality control thresholds and constituted the
first data release. Here we report on the second data release, covering an
additional ~63 sq.deg of the Kepler field. We apply the exact same quality
control criteria and photometric calibration as in the initial release
catalogue (see Greiss et al. (2012) for further details). The global
photometric calibration was derived by placing the KIS magnitudes as close as
possible to the Kepler Input Catalog (KIC) ones. The second data release
catalogue containing ~14.5 million sources from all the good photometric KIS
fields is available for download from the KIS webpage, as well as from the
Kepler Target Search page at MAST. It includes all the objects from the initial
data release catalogue and covers ~97% of the Kepler field. Therefore this
release adds ~8.5 million sources to the initial data release catalogue, all
observed between May and August 2012. The remaining ~3% of the field will be
completed once the Kepler field is visible in 2013.
