Category Archives: Documentation

Updated survey documentation for SkyView v3.4.3

Posted on May 23, 2019 by Tess Jaffe

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 It had gotten out of date and was missing some survey information.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 is now generated automatically from all of the … Continue reading →

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SkyView and HiPS

Posted on July 21, 2017 by Tess Jaffe

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 — we’ve added all of the … Continue reading →

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Babylon’s Legacy: Converting Decimal to Sexagesimal

Posted on July 24, 2014 by Tess Jaffe

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 way. So we need to be … Continue reading →

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SkyView Surveys Summary

Posted on March 5, 2014 by Tess Jaffe

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 addition of … Continue reading →

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SkyView updates

Posted on June 25, 2012 by Tess Jaffe

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. For each survey that we support, SkyView … Continue reading →

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New Fermi Surveys

Posted on May 1, 2012 by Tess Jaffe

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 MHz … Continue reading →

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New ImageFinders and Faster FITS

Posted on May 8, 2008 by Tess Jaffe

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 sometimes reading the entire image … Continue reading →

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Where is a given pixel?

Posted on April 29, 2008 by Tess Jaffe

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 skyview.util.CoordsPixel filename.fits 10.3 11.4 to find … Continue reading →

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Finding which image was used for each pixel

Posted on April 29, 2008 by Tess Jaffe

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 which images were used somewhere, but normally … Continue reading →

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New RASS Diffuse Emission maps

Posted on April 29, 2008 by Tess Jaffe

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 been subtracted out. This … Continue reading →

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