An interesting paper about a newly-identified nearby dwarf
galaxy was posted this evening on astro-ph:
https://arxiv.org/abs/1810.04741
Mirach's Goblin: Discovery of a dwarf spheroidal galaxy
behind the Andromeda galaxy
The galaxy is somewhat beyond the Local Group,
possibly linked instead with NGC 404. The object was discovered
on a stack of CCD images totalling 100 minutes exposure taken
with a 127mm f/6 refractor and green filter over four
separate nights. A cut-out of the original image is shown
in the paper. Seems like this would be a straightforward
challenge for some of the astro-imagers on the list to reproduce.
Mean surface brightness is V mag 26.5 per square arcsec,
and total magnitude about V = 18.3.
Some of the follow-up data were taken with the
Gran Telescopio Canarias --- a 10.4-meter telescope,
which is the largest-aperture telescope in the world.
\Brian
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