1.1 arcsec. - 219 million sources (50% have SNR > 5 in all bands). - Median 5σ-limit: 21.2 (r), 20.3 (Hα), 20.0 (i). - Lists the best detection of each unique source. ! ! Barentsen et al. (2014)
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 r - H↵ (b) After re-calibration 0.0 0.5 1.0 1.5 2.0 2.5 3.0 r - i 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 r - H↵ (a) Before re-calibration The initial calibration error exceeded 0.1 mag across 9% of the footprint. using nightly standard star observations using a retrospective calibration
overlaps were then used to correct the others. AAVSO Photometric All-Sky Survey (APASS) uses 20 cm f/3.6 Newtonians (8 deg2 FOV) => www.aavso.org/apass
include thorough quality control and re-calibration. World public & ready for science! - VPHAS+: multi-band catalogue in preparation, single-band source lists already available in the ESO archive (credit: CASU). Visit www.iphas.org and www.vphas.eu for more info.