Processing Images – M83 (Part 1 of 2)

M83, also known as the Southern Pinwheel Galaxy, is the target of our Image Processing today. As you can tell by the name, the Pinwheel Galaxy is a spiral galaxy.

Below are the 3 exposures from the Hubble telescope which were taken of M83 on 20th August 2009. These exposures use a red filter on the left, a blue filter in the middle and a green filter on the right.

There is no color yet as we add this in the image processing stage using the data captured in each of the exposures.

If you look at the picture below, you will see there is a slight problem with these exposures.

Look at the green filter on the right…. you will see that the M83 galaxy  is actually further down the picture than the other 2 exposures. If this is not fixed then the final image will show 2 x M83’s in the picture…. and that would not be a good look.

M83 exposures 2009-08-20 (Click to Enlarge)

TARGNAME= ‘MESSIER-083                   ‘ / proposer’s target name
RA_TARG =   2.042684583333E+02 / right ascension of the target (deg) (J2000)
DEC_TARG=  -2.985777777778E+01 / declination of the target (deg) (J2000)
DATE-OBS= ‘2009-08-20’         / UT date of start of observation (yyyy-mm-dd)
TIME-OBS= ’02:27:21′           / UT time of start of observation (hh:mm:ss)
EXPSTART=       55063.10233353 / exposure start time (Modified Julian Date)
EXPEND  =       55063.10927777 / exposure end time (Modified Julian Date)
EXPTIME =                600.0 / exposure duration (seconds)–calculated

~ by sydneystargazers on July 25, 2010.

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