The VLA Galactic Plane Survey

J. M. Stil; A. R. Taylor; J. M. Dickey; D. W. Kavars; P. G. Martin; T. A. Rothwell; A. I. Boothroyd; Felix J. Lockman; N. M. McClure-Griffiths

doi:10.1086/505940

arXiv · astro-ph/0605422

The VLA Galactic Plane Survey

J. M. Stil·A. R. Taylor·J. M. Dickey·D. W. Kavars·P. G. Martin·T. A. Rothwell·A. I. Boothroyd·Felix J. Lockman·N. M. McClure-Griffiths

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Abstract

The VLA Galactic Plane Survey (VGPS) is a survey of HI and 21-cm continuum emission in the Galactic plane between longitude 18 degrees 67 degr. with latitude coverage from |b| < 1.3 degr. to |b| < 2.3 degr. The survey area was observed with the Very Large Array (VLA) in 990 pointings. Short-spacing information for the HI line emission was obtained by additional observations with the Green Bank Telescope (GBT). HI spectral line images are presented with a resolution of 1 arcmin x 1 arcmin x 1.56 km/s (FWHM) and rms noise of 2 K per 0.824 km/s channel. Continuum images made from channels without HI line emission have 1 arcmin (FWHM) resolution. VGPS images are compared with images from the Canadian Galactic Plane Survey (CGPS) and the Southern Galactic Plane Survey (SGPS). In general, the agreement between these surveys is impressive, considering the differences in instrumentation and image processing techniques used for each survey. The differences between VGPS and CGPS images are small, < 6 K (rms) in channels where the mean HI brightness temperature in the field exceeds 80 K. A similar degree of consistency is found between the VGPS and SGPS. The agreement we find between arcminute resolution surveys of the Galactic plane is a crucial step towards combining these surveys into a single uniform dataset which covers 90% of the Galactic disk: the International Galactic Plane Survey (IGPS). The VGPS data will be made available on the World Wide Web through the Canadian Astronomy Data Centre (CADC).

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J. M. Stil, A. R. Taylor, J. M. Dickey, D. W. Kavars, P. G. Martin, T. A. Rothwell, A. I. Boothroyd, Felix J. Lockman, N. M. McClure-Griffiths. 2006-05-17. The VLA Galactic Plane Survey. https://doi.org/10.1086/505940

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