Hii-res image?
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Is there a hi-res version of this image somewhere?
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Budgieye
moderator
You can try to see if Hubble space telescope has it, though coverage is quite spotty.
find images in Hubble Legacy Archive http://hla.stsci.edu/ http://talk.galaxyzoo.org/#/boards/BGZ0000002/discussions/DGZ00018zb?page=1 where an amateur dug up a pretty image
RAIDERS OF THE HUBBLE ARCHIVE http://hubblesite.org/get_involved/hubble_image_processors/
https://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000wrb?page=6
You can try a general search on the name of the galaxy in Google or Google Scholar https://scholar.google.co.uk/
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Budgieye
moderator
Look at the references in NED, although it is hard work, and for some reason, astrophysicists publish graphs rather than pretty pictures.
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Budgieye
moderator
You can learn to use FITS files, but I'm not sure how much that will increase resolution.
Using FITS files https://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000wrb?page=6
Talk: Using FITS files by KWillett ADMIN, SCIENTIST The raw images are stored in a format known as FITS, which stands for "Flexible Image Transport System". It's been the standard in astronomy for many years, although not used very commonly in other fields. Unlike formats like JPEG or PNG, FITS both preserves the measured values in the image (which we need to make accurate measurements of brightness) and can include metadata about the observation as part of the image. The most common software for viewing FITS images is called DS9. It's free to download, and there are versions for Windows, Mac, and Linux. There are other ways to view and interact with FITS files, including common packages for IDL and Python. So - how do you get FITS images for a DECaLS subject? You can do it from the web browser. Let's ... http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0001kaa
DECaLS - new images and science by KWillett ADMIN, SCIENTIST (FITS files explanation half way down the page) http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0001kaa "OK - many users have raised interesting questions about the images that are coming up, often with features that are obvious only in one or more bands (remember that the color images you're classifying are a combination of three different filters). Since the GZ Examine tool doesn't work on the current images, at least for the moment, I wanted to show how you can download the raw images yourself.
The raw images are stored in a format known as FITS, which stands for "Flexible Image Transport System". It's been the standard in astronomy for many years, although not used very commonly in other fields. Unlike formats like JPEG or PNG, FITS both preserves the measured values in the image (which we need to make accurate measurements of brightness) and can include metadata about the observation as part of the image.
The most common software for viewing FITS images is called DS9. It's free to download, and there are versions for Windows, Mac, and Linux. There are other ways to view and interact with FITS files, including common packages for IDL and Python.
So - how do you get FITS images for a DECaLS subject? You can do it from the web browser. Let's use AGZ000atp8 as an example. From its page on Talk, I can find the coordinates for this galaxy, which are RA: 318.35963, DEC: 0.97547. Now I'm going to insert those coordinates into the following URL in my web browser:
You can see in the middle of that URL that I've set the RA and dec coordinates for this particular galaxy; you can pick any point on the sky and just substitute those values in. The other two parameters here are pixscale, which is the physical scale of the image in arcsec/pixel, and size, which gives you the number of pixels per side in the square image you're going to download. You can also change either of those values if you want to change the image size or scale. So this URL is going to download a 512x512 pixel FITS image for a galaxy centered at RA: 318.35963, DEC: 0.97547, at a scale of 0.2 arcsec/pixel (which means that the image will be 102 arcsec, or 1.7 arcmin in size).
That URL will download all three individual filters as a single file; DS9 can load it as a "data cube", where each plane of the data corresponds to a different filter. That's useful since you can toggle back and forth between the different filters, or even play it as a movie.
If you just want to download a single filter - say the image in the r-band, for instance, just add it to the end of the URL:
Remember, the three filters you have available are g, r, and z.
This is a bit more work, but will give you the same data that are used to make the color composites. I hope some of you are interested in using this and exploring the data further, especially for objects where you see single-color features that might only come from one band.
Yeah - DS9 was never designed with newbies in mind, and better tutorials would be a fantastic resource. Not something that the astro community has managed to develop, though, to my knowledge.
Here's one that astrobites put out: http://astrobites.org/2011/03/09/how-to-use-sao-ds9-to-examine-astronomical-images/
And this is a good tutorial on IRAF, which has some DS9 stuff in it, but it's lacking in screenshots. http://www.twilightlandscapes.com/IRAFtutorial/"
SAO webite: SAOImage DS9 http://ds9.si.edu/site/Home.html "SAOImage DS9 is an astronomical imaging and data visualization application. DS9 supports FITS images and binary tables, multiple frame buffers, region manipulation, and many scale algorithms and colormaps. It provides for easy communication with external analysis tasks and is highly configurable and extensible via XPA and SAMP."
Forum: FITS Files (Flexible Image Transport System) by waveney FITS is a standard method for storing astronomical data and is used for the transport, analysis, and archival storage of scientific data sets. FITS is the most commonly used digital file format used in astronomy. See the forum link below for a tutorial on using the FITS file to look at SDSS images. Links: FITS Home Page http://fits.gsfc.nasa.gov/ Wikipedia FITS Entry http://en.wikipedia.org/wiki/FITS Pat’s Tutorial on using FITS Sunday April 5th 2009: DS9 and Platterpillars http://www.galaxyzooforum.org/index.php?topic=274805.0
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I had tried an image search using Google Images and tineye.com but did not get anything. I used the IDs given in the SDSS and NED sites in Google and Google Scholar.
Thanks for the good details. I'll try these out.
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leeskelvin
scientist
in response to karthikeyan.d's comment.
Hi karthikeyan.d,
In addition to the excellent information posted by Budgieye above(!), I also wanted to highlight that GAMA-KiDS PNG postage stamps can be cut out using the GAMA Panchromatic Swarp Imager at this link: http://gama-psi.icrar.org/psi.php .
As the galaxy in question here is a GAMA-KiDS galaxy, this should work for you. All you need is the GAMA CATAID, which is given in the Galaxy Zoo examine page. For this particular galaxy, the CATAID is 599582.
The GAMA PSI cutout tool allows you to gain access to the full 21-wavelength imaging for this galaxy, which may give you more of an insight into this beautiful looking galaxy.
All the best,
Lee KelvinPosted
