M 106 (Canes Venatici)

(fritz kleinhans)

M 106 (a Seyfert Galaxy):
May 27-28, 2017; Chiefland Astronomy Village, Chiefland, FL.

TAK 250 mm CDK reduced to f/7.3 and 1825 mm FL.
Cooled Hutech Canon 6D, ISO 800, camera T ~ - 5C, 0.74 "/pixel, N ~ up.
AP 1100 Mount, 50mm f/5 Borg Guidescope, Lodestar X2 and PHD2, dithering.
5 min subs x 25 = 125 min  (1 of 26 rejected)
25 lites, 4 darks, 8 flats; captured with BYEOS and processed in Images Plus and Picture Window.

This image held up well to extensive processing.  Masking was used to isolate the brighter half of the
galaxy and increase the contrast.  Richardson Lucy sharpening improved the detail.  Then the Images
Plus function 'Multiresolution Smooth/Sharpen' was used to to sharpen the medium and larger detail
in the brighter regions of the galaxy.  Finally MRSS was used to smooth the noise in the fainter outer arms
of the galaxy.  The color saturation was increased some, but other wise, the color balance out of the camera
was good.  I concentrated on M06 only.  Everything else came out where it came out.


M106 (cropped):
(Details above.)

Here are some good links for M106:
Russell Croman's image of M106
M106 Seyfert Galaxy
APOD 1-16-2016
APOD 5-29-2009



B&W Negative Image with Sky Tools Pro 3 overlay identifying the brighter galaxies











Limiting magnitude:
The area inside the blue crop box near the center of the frame was used to determine
the limiting magnitude of this picture; namely about m = 20.5 for galaxies.  And remember,
there is significant vignetting towards the edges of the frame.  Flat fielding hides that, but
can't put back what isn't there :P
The 'bright' galaxy in the upper center of the crop box is Leda 2295839 aka
2MASX J12175355+4718016 of mag ~ 17.8.
See blow ups, below, of the crop box area.








    The APOD of 5-29-2009 was used to determine which of my faint objects were stars and which were galaxies; in the crop box.  Below, the crop box was upscaled to 0.37 "/pixel to
     keep the image from becoming too crowded.  Then the APOD was cropped, scaled, and rotated to match my crop box.  NED was used to determine the magnitudes of the galaxies.
    Note the blue QSO in the lower left corner.


    Finally, here is my my pic and the APOD for the crop box area.  My picture is with a 10" TAK CDK.  Ken Crawford's image is with a 20" RCOS.
    It appears that he captured one or two more galaxies than I.

AP Home          Kleinhans, 2018