NGC 3941 with SN 2018pv

Posted by dcrowson
on Friday, February 23, 2018

NGC 3941 (PGC 37235, UGC 6857 and others) is a barred lenticular type 2 Seyfert galaxy located approximately 40.5 million light-years away in Ursa Major. Supernova 2018pv (AT2018pu) was discovered just west of the core on February 3rd, 2018. Local astronomer and fellow Astronomical Society of Eastern Missouri member Stephen Hummel took spectra of this galaxy and was looking for a decent image as it appears to be mostly ignored and not very photogenic.

Luminance – 12x300s – binned 1x1 – 60 minutes
RGB – 8x180s – 24 minutes each – binned 2x2

132 minutes total exposure – 2 hours 12 minutes

Imaged February 22nd, 2018 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

LRGB - https://www.flickr.com/photos/dcrowson/25573330557/sizes/l

LRGB annotated - https://www.flickr.com/photos/dcrowson/40400556902/sizes/l

This was a good target to catch on a near 50% moon night. Even with the moon and short exposures, I was able to easily pick up a magnitude 19.39 (V) quasar. This is a small dot under the second brightest star on the left (west) side of the image just below center. See the annotated version.

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