These images are recorded with a 16 inch diameter telescope
operating at , that is, with a focal length
the
diameter. The focal length of this telescope is therefore about 160 inches
or 4064 mm.
The pixels are separated by 9 microns center-to-center on the detector.
m1_600s_01d.fits
with ds9. Adjust the
Scale->Parameters
to get the best rendition of this supernova
remnant nebula
and its faint stars. Set
the Zoom->Invert Y
so that north is at the top of the displayed image.
Use
xephem's View->SkyView
and find the Messier object M1 in Taurus.
Zoom in to
the map of the M1 region until the field of view is about 0.2 degrees. Identify
a few stars in this field, and try to measure the angular scale of the image by
using the coordinates for stars you can identify. How close is this angular
scale to your
calculation? Can you explain the differences?