Reference Coordinates in Fixed Projections
SkyView treats a number of projections (Aitoff, Cartesian, Sansom-Flamsteed/Sinusoidal) as fixed projections. Regardless of the position you specify, the sky is projected to the plane in the same way....
View ArticleNew RASS Diffuse Emission maps
A new survey including seven bands of data from the ROSAT All Sky Survey data has been added to SkyView. The RASS Background 1-7 data show the entire sky in diffuse X-ray emission. Point sources have...
View ArticleFinding which image was used for each pixel
One of the major functions of SkyView is mosaicking multiple images together. Occasionally you may be interested in finding out which source image was used for a given pixel. The FITS header indicates...
View ArticleWhere is a given pixel?
Included in the skyview.util package are two simple utilities that find the coordinate of a pixel in the image or the pixel corresponding to given coordinates. You can use them as: java -cp skyview.jar...
View ArticleNew ImageFinders and Faster FITS
The GALEX release was accompanied by a few other changes. The one that some users may notice is that for surveys where the data is gzip compressed, SkyView should be a little faster. SkyView was...
View ArticleNew Fermi Surveys
We’re pleased to be able to provide a new set of Fermi surveys. Fermi is the highest energy survey in SkyView and heretofore we had been providing two bands of Fermi data, from 100 to 5450 MHz and 5450...
View ArticleSkyView updates
We are releasing a new version of SkyView today (2012-06-25). We’ve a separate article on the new INTEGRAL Galactic Plane surveys, but we’ve made some changes that affect many of the survey datasets....
View ArticleSkyView Surveys Summary
With the inclusion of multiple GOODS surveys we thought it might be useful to take a look at the overall properties of SkyView surveys. So here’s a summary of what we have in a few graphs. With the...
View ArticleBabylon’s Legacy: Converting Decimal to Sexagesimal
It’s usually convenient to store and process angles and times in some simple decimal value, but we often wish to display them in a conventional sexagesimal notation or allow users to enter values that...
View ArticleSkyView and HiPS
Next week we’ll be releasing version 3.3.0 of SkyView. The big change from the user perspective will be the new Swift XRT combined image. This is similar in spirit to the venerable PSPC surveys —...
View ArticleUpdated survey documentation for SkyView v3.4.3
We have updated the survey documentation page. It had gotten out of date and was missing some survey information. The Contents listing the available surveys by wavelength regime had been incomplete but...
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