IRAS Based Thermal Emission Maps

Click on one of the links below to view images.

Index • Serpens • Ophiuchus • Perseus • Taurus

Instructions for viewing FITS files

Open the fits images using SAOImage DS9 (ds9 at the Unix command prompt if it is on the network).
Go to Analysis, Coordinate Grid Parameters. You can customize what you want to display under view, as well as change the coordinate system (galactic, ecliptic, equatorial) under coordinate. You can also change the color of the grid and the grid numbers under color.
You can change the color of the image itself. For all the images seen here I used the SLS color scheme under Color.
To look at a histogram of the distribution of pixels, go to Scale, Scale Parameters. In scale parameters, I keep my histogram linear by going to Graph, linear. You can also adjust the color table by truncating low and high values by moving the red line on the left of the histogram to the right and the green line on the right side of the histogram to the left.
By clicking on the tabs directly above the main image and below the information about the pixel the mouse is over, you can display the image as linear, logarithmic, squared, square root, histogram equilization, etc. You can also zoom in and out on the image.
In the top right corner of SAOImage ds9 is a zoomed in part of the image centered on where you cursor is. Also, when you are zoomed in you can change the region you are viewing by moving the turqoise colored rectangle in the small image (directly to the left of the zoomed in image, both of these images are in the upper right corner of SAOImage ds9).

Last modified on Friday, 22-Feb-2008 13:54:41 EST