Category Archives: Discussion

IRAS image of Saturn

We have had a lot of interest in images centered on coordinates 13h 45m 18.2s, -08d 13m 07s recently.  SkyView images of this area in the sky using the Infrared Astronomical Satellite (IRAS) survey are often added to the SkyView Image … Continue reading

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Lanczos Normalization Error

The Lanczos sampler is a truncated version of the optimal sampling function, sinc(x). The kernel of this sampler is given as f(x) = sinc(pi x) sinc(pi x/n)    |x| < n 0    |x| >= n Here x is given in … Continue reading

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SkyView V3.1.14: VLA FIRST (1.4 GHz) survey update

SkyView version 3.1.14 has been released with a change that affects FIRST survey images. It was brought to our attention that some FIRST images generated using SkyView differed from images generated via the FIRST web server. We investigated and found … Continue reading

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V3.1.10: WISE now uses All-WISE data

We’re getting ready to release the next version of SkyView. The only significant change is an update to the WISE datasets which will now point to the All-WISE data release. This provides significantly deeper coverage in some areas and bands … Continue reading

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Looking for Moving Targets? Try SkyMorph

One of the restrictions on SkyView is that you need to specify a fixed position in the sky to look at. For many years the SkyView machine has hosted a companion service, SkyMorph, that allows you to look for many … Continue reading

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Babylon’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 way. So we need to be … Continue reading

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V3.1.7: SkyView and Google Analytics

Today we will be releasing version 3.1.7 of SkyView. There are no changes to the user code, but the primary pages will now be instrumented so that usage will be tracked through Google Analytics. This implements the NASA general policy … Continue reading

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V3.1.6: RGB Images Bug Fix

The survey descriptions for a number of our surveys (notably including some of the DSS surveys and the IRAS and IRIS surveys) had an error in them that made it impossible to create RGB images if one of the affected … Continue reading

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SkyView 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 addition of … Continue reading

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SkyView gets the GOODS

Next week we hope to begin releasing a whole new set of surveys in SkyView. These surveys are from the GOODS regions — the Great Observatories Origins Deep Survey. Two regions of the sky (northern and southern hemispheres), relatively devoid … Continue reading

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