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Tag Archives: GALEX
SkyView updates GALEX survey
Galaxy Evolution Explorer (GALEX) surveys have been updated to use the GALEX GR6 release. As mentioned in a previous post GR6 improvements include more sky coverage and a bit better calibration. Image generation for GALEX may be slow for a … Continue reading
New Fermi and GALEX surveys soon in SkyView
Over the next week or two we’ll be releasing a new and an updated survey set. The Fermi all-sky data will give us a major new image of the gamma-ray sky. Fermi has higher sensitivity and resolution than the EGRET … Continue reading
Features in the Gallery: Space Frisbees?
This image from 2009-04-27 22:10:22 seems to show a lot of disks in the sky. What’s going on here? The image is taken from the ROSAT pointed observations. The ROSAT mission comprised two phases. In an initial phase the satellite … Continue reading
SkyView GALEX GR4: Off center images fixed.
A new version of SkyView has been installed to accommodate the issues that off center GALEX GR4 images presented. GALEX now uses a special GalexExposure Image finder. This uses knowledge of the GALEX survey to find the center of the … Continue reading
Unexpected image offsets in the GALEX GR4
The underlying GALEX observations used in SkyView are 3840×3840 pixel images where only a circle with a radius of about 2900 pixels is actually exposed. In earlier releases the exposed region seemed to be centered with the image square but … Continue reading
Full GALEX GR4 Available in SkyView
The operational version of SkyView now supports the full GALEX GR4 release. This includes a total of about 170,000 UV images of the sky. Total coverage is about 25,000 square degrees or well over half the sky. As discussed in … Continue reading
Duplicate EPOCHs in GALEX data
If you’ve tried the new GALEX survey from the command line, you may have noticed some messages Warning: Multiple occurrences of key: EPOCH popping up. Many of the GALEX FITS files have two EPOCH keywords in their headers. Fortunately they … Continue reading
GALEX survey available!
SkyView now includes data from GALEX. This is a major new survey for us. GALEX provides high resolution images in the ultraviolet for about a quarter of the sky. This fills a substantial hole in the resolution/regime coverage for SkyView. … Continue reading
Circular images, GALEX and Image Finders.
In the past week we’ve begun the process of adding the GALEX near and far UV data into SkyView. Assuming we don’t run into unexpected problems it should be available sometime next week. One issue that did come up is … Continue reading