The INT/WFC Photometric Hα Survey of the Northern Galactic Plane (IPHAS) is a 1800 deg2 imaging survey covering Galactic latitudes |b| < 5° and longitudes ℓ = 30°–215° in the r, i, and Hα filters using the Wide Field Camera (WFC) on the 2.5-m Isaac Newton Telescope (INT) in La Palma. We present the first quality-controlled and globally calibrated source catalogue derived from the survey, providing single-epoch photometry for 219 million unique sources across 92 per cent of the footprint. The observations were carried out between 2003 and 2012 at a median seeing of 1.1 arcsec (sampled at 0.33 arcsec pixel−1) and to a mean 5σ depth of 21.2 (r), 20.0 (i), and 20.3 (Hα) in the Vega magnitude system.
I myself was first introduced to this knowledge during my brief but rewarding tenure on the Digital Galaxy Project portion of the rebuild of the Hayden Planetarium at the American Museum of Natural History in New York City. Everyone on that project was a dedicated idealist with stars in their eyes.(2)
When downloading the data, you can choose to download prepared datasets of the survey, or you can choose which data fields you want to review. There are 99 different fields, and a dozen or so different formats you can get them in. Just getting the data will probably take several days.