Making 3-color Composites with ds9 with ds9
N49B Supernova Remnant Reveals Magnesium in Abundance Credit NASA/CXC/Penn State/S.Park et al. Scale Each panel is 3.25 arcmin per side Category Supernovas and Supernova Remnants Coordinates (J2000) RA 05h 25m 26.04s | Dec -65º 59' 06.90“ Constellation Dorado Observation Date September 15, 2001 Observation Time 8.3 hoursObs. ID 1041 Color Code Energy (Left panel: Red 0.3-0.8keV, Green 0.8-1.5keV, Blue 1.5-3.0 keV; Right panel: Pink 0.3-3.0keV; Cyan/Blue = Mg) Instrument ACIS Reference S. Park et al, 2003 Astrophys. J. 592, L41 Distance Estimate 160,000 light years (distance to Large Magellanic Cloud) Also Known As SNR 0525-66.0 Release Date March 24, 2004
SNR 0103-72.6 Chandra Inside Glowing Ring “Oxygen and neon are the most abundant elements in the remnant, evidence that the star that exploded was at least ten times as massive as the Sun.” Color Code Energy (Red 0.35-0.75 keV, Green 0.75-0.99 keV, Blue 0.99 -3.0 keV) What do you think the red in the image represents?
N63A Celestial Illumination: The X-Ray Glow From An Exploded Star A Chandra “blue blob” Color Code Intensity: X-ray (blue), Optical (green), Radio (red) “The fluffy crescent-shaped X-ray features that appear around the edge of the remnant are thought to be fragments of high-speed matter shot out from the star when it exploded, like shrapnel from a bomb. “
SN 1006 Tycho's SNR Color Code Energy: Red 0.95-1.26 keV, Green 1.63-2.26 keV, Blue 4.1-6.1 keV Color Code Energy: Red 0.50 - 0.91 keV, Cyan 0.91 - 1.34 keV, Blue 1.34 - 3.00 keV
Load Chandra data into ds9 and use “energy cut” to show photons within a certain energy range. Save each energy cut as a separate .tiff file. ds9
Load .tiff files made with ds9 showing “soft”, “medium” and “hard” x-rays into Image J to make final 3-color composite. Image J
Software Downloads ds9 http://chandra-ed.harvard.edu Image J http://rsbweb.nih.gov/ij/download.html