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Figures from SkyView: A Decade with the Virtual Telescope, a paper presented at the American Astronomical Society meeting in Seattle, WA in January 2004.

Usage plots

Plot of hits per year over the last 7 years
This plot shows steady growth over the past 7 years with a large rise this past year after the installation of new hardware and with the selection as a Scientific American SciTech web site. (The drop in 1997 is due to a gap in data collection)
Plot of average hits per day of week
This usage plot shows diurnal variations and a drop on weekends.

Percentage of SkyView requests by wavelength

Plot of hits per wavelength
Obviously, optical surveys are the most popular.

Logarithmic densities of all requested image center locations (galactic coordinates)


(Click for larger image)
Image of all image center locations (weighted)
color legend for density image

Locations of all requested image centers (galactic coordinates)


(Click for larger image)

Plot of all image center locations

Image center locations by wavelength

These plots show the number of locations requested and areas of interest for each wavelength

(Click for larger image)
plot of image center locations of all gamma-ray requests
Gamma-ray		 plot of image center locations of all x-ray requests
X-ray
plot of image center locations of all euv requests
EUV		 plot of image center locations of all uv requests
UV
plot of image center locations of all optical requests
Optical		 plot of image center locations of all infrared requests
Infrared
plot of image center locations of all radio requests
Radio

Density of image center locations by wavelength

These plots show the density (logarithmic) of images at requested locations for each wavelength

(Click for larger image)
image of density at image center locations of all gamma-ray requests
Gamma-ray		 image of density at image center locations of all x-ray requests
X-ray
image of density at image center locations of all euv requests
EUV		 image of density at image center locations of all uv requests
UV
image of density at image center locations of all optical requests
Optical		 image of density at image center locations of all infrared requests
Infrared
image of density at image center locations of all radio requests
Radio

color legend for density image

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SkyView has been developed with generous support from the NASA AISR and ADP programs (P.I. Thomas A. McGlynn) under the auspices of the High Energy Astrophysics Science Archive Research Center (HEASARC) at the NASA/GSFC Astrophysics Science Division.

We gratefully acknowledge the support of NASA and contributors of SkyView surveys.