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Supernova SN2022hrs in NGC 4647


Bill S

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 I snapped this the other night. It's a fairly easy one. Showed up well in just one 15 second sub in Jocular. The large galaxy is M60. SN2022hrs (= ATLAS22mip) (= ZTF22aafoqrd), TNS discovered 2022/04/16.619 by Koichi Itagak.

The galaxy (NGC 4647) is about 63 Mly away and is classed as SAB(rs)c. It is interacting with M60 and the pair are Arp 116.

The two galaxies overlap in a line of sight sense in longer exposures and so there have been suggestions that the supernova could be in M60 rather than NGC 4647. The supernova is around magnitude 12.6 and is a Type 1a (white dwarf accretion from its binary companion leading to the the supernova).

1492552680_NGC4647SN2022hrsarrowed.png.dd82b718360bcfd280679ffda20339b4.png

 

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One of our club members was able to get a spectrum with his Star Analyser 100. 

Was able to confirm it as a type 1A Sn.

Worth a go, if anyone else has one.

The advantage is that it's relatively well separated from its host galaxy, so a relatively clear spectrum can be obtained.

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The scope is a 200 mm f/5 Newtonian with a focal reducer making it about f/3.5. The camera is a Starlight Xpress Lodestar X2. The snapshot is using 12 x 15 second subs. Live stacking and processing using Jocular. The supernova was clearly visible in just one sub. 

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