Some supernovae

[Bill S]

A clear night gave me the chance to have a look at some supernovae. I also caught up on December 2023 to March's Webb Deep Sky Society's Galaxies of the Month/ (I may post these separately.) I used the Rochester supernova site to find details and compare my snapshots with others' images.

First up was 2024ehs. Discovered 15 March. Currently mag 14.3 Type II (i.e. a core collapse of a large star at the end of its life)

The second one I looked at was 2024bch. Discovered 29 January. Currently mag 14.6  Type Iin. This one is also a core collapse supernova. However it's a rarer type.

Type IIn have narrow hydrogen emission lines in their spectra (hence the 'n'). The special properties of this type are thought to be due to interaction of the expanding supernova with

material around the star, the circumstellar medium.

 

I then looked at 2024exw. Discovered 4 March Currently mag 15.0 Type II. The large bright galaxy to the top left of the snapshot is M98.

 

Finally I looked at 2024gy. Discovered 4 January. Currently mag 14.8 Type IA. (i.e this is the type of supernova where the two stars are involved and material accretes on a white dwarf until it reaches a limiting point (Chandrasekhar limit, about 1.4 the Sun's mass) and explodes. They are useful standard candles for working out the distance of the host galaxy. Peter C65 recently posted a set of images of this galaxy and supernova showing them over several months.

 

200mm F/5 Newtonian with  focal reducer making it about F/3.5. Lodestar X2 with Starlight Live and Jocular.

Just need a few more clear nights!

[PeterC65]

I've enjoyed watching the change in the NGC4216 supernova. Your post has inspired me to find others to follow.

 

[Fir Chlis]

Interesting shots - supernovae are on my todo list - as @PeterC65 has done, I’d like to monitor one over time. 
 

But so much to look at, so few clear nights. 
 

Geoff

[Martin Meredith]

Brilliant to see this batch of supernovae Bill. I love your commentary -- the poor galaxies barely get a look in 🙂 The Lodestar is made for this kind of observing.

[Bill S]

I looked at a couple more supernovae on 12/13 April.

2024efn Discovered 12 March Currently mag 15.9. Another type IA. ~300 Mly

 

 

The other one was 2024cld. Discovered 13 March MG 16.0. Type II ~132 Mly