- #Saoimage ds9 scale meaning archive#
- #Saoimage ds9 scale meaning software#
- #Saoimage ds9 scale meaning download#
- #Saoimage ds9 scale meaning windows#
Once you have completed your changes, click Close in the Is not already set, and then click Apply to commit the changes.Ĭheck the effect on your image and adjust as necessary toīring out the details but leave the background as black as possible. Once you have found a low number, enter it in the Limits Lowįield in the Scale Parameters window. Number, and you can always adjust it later. You don’t have to be completely accurate as the black point will be around a certain Look through your image and try to find the lowest value. The number shown in the Value field as shown: Hover your mouse over various dark parts of the image and note We’ll now adjust the black point of the scale – it is Move the window so that it does not overlap the image. We can adjust the scale to bring out some more detail.įrom the menu, select Scale – Scale Parameters. Select the Scale function – from the menu, select Scale – Log and your display should look something like this: Your window might look like the following with the image From the main window, select File – Open and locate and open the blue image. From the main window, select File – Open and locate and open the green image.ħ. From the main window, select File – Open and locate and open the red image.ĥ. From the menu in the smaller window, select Lock – Scale as shown:ģ.
#Saoimage ds9 scale meaning windows#
So that both windows are visible on the screen but not overlapping.Ģ. Start SAOImage DS9 and select Frame – New Frame RGBĪ new smaller window pops-up – move the SAOImage DS9 window Steps to open the images and adjust the scale.ġ. SAOImage DS9 and then adjust the image’s scale so that it looks good. To create an RGB image, you have to open all three images in
#Saoimage ds9 scale meaning download#
Visit the following page to download the application:įollow the installation directions for your platform – it shouldīe relatively straight-forward since SAOImage DS9 is self-contained. SAOImage DS9 is freely available for a number of platforms including Windows, Mac, and Linux. I took these images using, telescope 33, on December I have made sample FITS files available for download for this tutorial – these are the same files I worked with to create this tutorial. The rest of this article describes the process. The nice thing is that the process of creating an RGB image is So clearly, SAOImage DS9 is superior to both JS9 and FITS Have good data to begin with, which is the case here).
However, MaxIM DL is expensive so you should expect good results (assuming you This image reveals the most detail of all of the images I created the following image using SAOImage DS9:Ĭlearly this image is far better than the other two with moreĪnd finally, for the sake of comparison, I processed theįITS files using MaxIM DL and came up with this image: The image, however, is less noisy and grainyĮven though the same underlying FITS files were used to create this image as The details of the nebula are more easily resolved, yet the I used the directions in Using FITS Liberator To Create An RGB Image to create the following image: Is difficult to make out the nebula in this image – the image is noisy and I followed my own directions in Using ’s JS9 FITS Editor To Create RGB Images to create a final image of NGC 3195:Īlthough the image is cropped and zoomed in quite a bit, it
#Saoimage ds9 scale meaning software#
NGC 3195 is a small target sized at just 40 x 35 arcseconds, so the image manipulation software must have good resolution for the target to show up in the final image. Let’s look at the results of basic processing of a planetary nebula. With options like the online FITS viewer JS9 and JS9-4L andįITS Liberator, why would you use SAOImage DS9?Įach of the applications implements their algorithms differently which produces different results. This article walks you through creating an RGB image using SAOImage DS9 is used for variousĪnalysis of Chandra X-Ray as well as other FITS data.
#Saoimage ds9 scale meaning archive#
SAOImage DS9 is a FITS file viewing and manipulationĪpplication from the Chandra X-ray Science Center (CXC) and the High EnergyĪstrophysics Science Archive Center (HEASARC).
0 kommentar(er)
