The INT photometric H-alpha survey of the northern galactic plane

By J. Drew, R. Greimel, M. Irwin, A. Aungwerojwit, M. Barlow, R. Corradi, J. Drake, B. Gänsicke, Paul J. Groot, A. Hales and 25 more. 2005

294 citations recorded by the source corpus.

The Isaac Newton Telescope (INT) Photometric Halpha Survey of the Northern Galactic Plane (IPHAS) is a 1800-deg 2 CCD survey of the northern Milky Way spanning the latitude range -5° < b < + 5° and reaching down to r'~= 20 (10sigma). Representative observations and an assessment of point-source data from IPHAS, now underway, are presented. The data obtained are Wide Field Camera images in the Halpha narrow-band, and Sloan r' and i' broad-band filters. We simulate IPHAS (r'-Halpha,r'-i') point-source colours using a spectrophotometric library of stellar spectra and available filter transmission profiles: this defines the expected colour properties of (i) solar metallicity stars, without Halpha emission, and (ii) emission-line stars. Comparisons with observations of fields in Aquila show that the simulations of normal star colours reproduce the observations well for all spectral types earlier than M. A further comparison between colours synthesized from long-slit flux-calibrated spectra and IPHAS photometry for six objects in a Taurus field confirms the reliability of the pipeline calibration. Spectroscopic follow-up of a field in Cepheus shows that sources lying above the main stellar locus in the (r'- Halpha,r'-i') plane are confirmed to be emission-line objects with very few failures. In this same field, examples of Halpha deficit objects (a white dwarf and a carbon star) are shown to be readily distinguished by their IPHAS colours. The role IPHAS can play in studies of spatially resolved northern Galactic nebulae is discussed briefly and illustrated by a continuum-subtracted mosaic image of Shajn 147 (a supernova remnant, 3° in diameter). The final catalogue of IPHAS point sources will contain photometry on about 80 million objects. Used on its own, or in combination with near-infrared photometric catalogues, IPHAS is a major resource for the study of stellar populations making up the disc of the Milky Way. The eventual yield of new northern emission-line objects from IPHAS is likely to be an order of magnitude increase on the number already known.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/c7e456f511348eaebdda885cd172a06228092d55

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Citations in the corpus

The UKIDSS galactic plane survey (2007, methodology): “Work by members of the IPHAS team (Drew et al.2005) has shown that the IPHAS (r’-i’) vs. (r’-Hα) two colour diagram can be used to break the degeneracy with extinction and estimate the approximate spectral type and distance of most field stars.”
Galactic reddening in 3D from stellar photometry – an improved map (2018, methodology): “The Sale14 map is based on stellar photometry from IPHAS (Drew et al. 2005).”
The second data release of the INT Photometric Hα Survey of the Northern Galactic Plane (IPHAS DR2) (2014, methodology): “It was noted by Drew et al. (2005) that the very bright line limiting value of r − Hα is ∼3.1 in the Vega system.”
Survey of period variations of superhumps in SU UMa-type dwarf novae. X. The tenth year (2017) (2009, background): “09+071947.6 (r=18.503, Drew et al. 2005), and the color and large proper motion suggested a dwarf nova rather than a classical nova (vsnet-alert 15768).”
The Hα surface brightness–radius relation: a robust statistical distance indicator for planetary nebulae (2015, methodology): “These include the SuperCOSMOS H-alpha Survey (SHS; Parker et al. 2005; Frew et al. 2014a), the INT Photometric HAlpha Survey (IPHAS; Drew et al. 2005), the VST Photometric H-Alpha Survey (VPHAS+; Drew et al. 2014), and the lowerresolution Southern H-Alpha Sky Survey Atlas (SHASSA; Gaustad et al.…”
A 3D Dust Map Based on Gaia, Pan-STARRS 1, and 2MASS (2019, methodology): “Sale et al. (2014) apply a hierarchical Bayesian model of the distribution of dust, as well as stellar distances and types, to the INT Photometric Hα Survey of the Northern Galactic Plane (Drew et al. 2005, “IPHAS”).”
AGaiaData Release 2 catalogue of white dwarfs and a comparison with SDSS (2018, background): “A potentially more complete selection of white dwarfs in the Galactic plane could be achieved combining Gaia observations with dedicated photometric surveys (e.g., IPHAS (Drew et al. 2005) or VPHAS+ (Drew et al. 2014)).”
The Macquarie/AAO/Strasbourg Hα Planetary Nebula Catalogue: MASH (2006, background): “Note that the SHS also overlaps at the equator with the IPHAS Northern Hα survey counterpart currently underway on the INT 2.5m telescope on La Palma (Drew et al. 2005) which promises to deliver an equivalent increase in PNe in the northern Galactic Plane (Corradi et al. 2005). c© 0000 RAS, MNRAS…”
The VST Photometric Hα Survey of the Southern Galactic Plane and Bulge (VPHAS (2014, methodology): “Where needed for comparison, we have also computed colours based on the Pickles (1998, hereafter P98) spectrophotometric stellar library [the approach adopted by Drew et al. (2005) for IPHAS].”