Re: Inverted SDSS DR12 images
Posted by
karenacollins on
May 27, 2020; 5:04pm
URL: http://astroimagej.170.s1.nabble.com/Inverted-SDSS-DR12-images-tp1355p1356.html
Hi Richard,
If you are running the latest daily build, you may need to disable
the new option Image_Menus=>View=>"Auto WCS North up, East
left". This problem occurs when image orientations on the sky are on
the threshold of the flipping the orientation of North up, East
left. The usual case is when North is pointing close to the
direction of the X-axis instead of the Y-axis.
Karen
On 5/27/2020 12:46 PM, Richard Piccioni
[via AstroImageJ] wrote:
I have been downloading sets of FITS files from the SDSS DR12
Science Archive Server, specifically images of the same field and
camcol taken through g, r, and i filters). When I open the files
in AJI, I find they are not oriented in the same way. I do not
see that behavior when I open the same files in SAOImageDS9.
I can reorient the non-conforming image using AJI View functions,
but of course those adjustments do not persist, e.g., when I
create an image stack. I'd like my students to be able to work
exclusively within AJI, so have tried hard to find/write a macro
that changes the FITS itself, but without success.
Any advice would be greatly appreciated.
Here's a SAS search that yields FITS files showing this behavior:
https://dr12.sdss.org/fields/runCamcolField?run=125&camcol=1&field=12
Compare the g- and r-band FITS.
Thanks,
Richard