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The second data release of the INT Photometric H Survey of the Northern Galactic Plane (IPHAS DR2)

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Barentsen, G., Farnhill, H. J., Drew, J. E., Gonzalez-Solares, E. A., Greimel, R., Irwin, M. J., Miszalski, B., Ruhland, C., Groot, P., Mampaso, A. et al.
(2014) The second data release of the INT Photometric H Survey of the Northern Galactic Plane (IPHAS DR2). Monthly Notices of the Royal Astronomical Societ, Volume 444 (Number 4). pp. 3230-3257. doi:10.1093/mnras/stu1651 ISSN 0035-8711.

An open access version can be found in:
  • ArXiv
Official URL: http://dx.doi.org/10.1093/mnras/stu1651

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Abstract

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. We explain the data reduction and quality control procedures, describe and test the global re-calibration, and detail the construction of the new catalogue. We show that the new calibration is accurate to 0.03 mag (root mean square) and recommend a series of quality criteria to select accurate data from the catalogue. Finally, we demonstrate the ability of the catalogue's unique (r − Hα, r − i) diagram to (i) characterize stellar populations and extinction regimes towards different Galactic sightlines and (ii) select and quantify Hα emission-line objects. IPHAS is the first survey to offer comprehensive CCD photometry of point sources across the Galactic plane at visible wavelengths, providing the much-needed counterpart to recent infrared surveys.

Item Type: Journal Article
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title: Monthly Notices of the Royal Astronomical Societ
Publisher: Oxford University Press
ISSN: 0035-8711
Official Date: 11 November 2014
Dates:
DateEvent
11 November 2014Published
15 September 2014Available
11 August 2014Accepted
11 August 2014Submitted
Volume: Volume 444
Number: Number 4
Page Range: pp. 3230-3257
DOI: 10.1093/mnras/stu1651
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Open Access Version:
  • ArXiv

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