SN 2021rhu: Bright Supernova in NGC 7814 (Caldwell 43)

[michael.h.f.wilkinson]

A mag 12.8 supernova is visible in NGC 7814 in Pegasus. More information here:

https://www.rochesterastronomy.org/supernova.html#2021rhu

Will see if I can spot it when clear skies return

[michael.h.f.wilkinson]

Made some comparison/finder charts using the AAVSO Variable Star Plotter

3 deg FOV, orientation as in RACI finder

1 deg FOV, orientation as in SCT with diagonal

same, with SDSS image overlaid

As can be seen, the SN is really close to the core

[John]

Interesting host galaxy as well !

Thanks Michael

[michael.h.f.wilkinson]

7 minutes ago, John said:

Interesting host galaxy as well !

Thanks Michael

Spotted the galaxy a few years ago with the Celestron C8, nice edge-on spiral

[Paul M]

I'm looking forward to having a look at this but, as clear and blue as the sky has been here today, it won't be tonight that I try. The clouds are due to roll in before midnight

The weekend looks promising though just before the Moon starts getting in the way!

[John]

The issue for me is that Pegasus does not clear the surrounding houses / trees until the early hours. Can't do a really late one tonight (though it is clear) so I'll hope the SN stays observable for a few days.

 

[michael.h.f.wilkinson]

7 hours ago, John said:

The issue for me is that Pegasus does not clear the surrounding houses / trees until the early hours. Can't do a really late one tonight (though it is clear) so I'll hope the SN stays observable for a few days.

 

They can last months., so fingers crossed 

[Mark at Beaufort]

Thanks Michael for the 'heads up'. Checking back I observed this galaxy in 2008, 2010 and 2011 so a revisit is called for. Unfortunately it does not rise high enough until the early hours so hopefully I will catch the SN.

[michael.h.f.wilkinson]

I will be off to Italy shortly, so hopefully it will be a bit easier, as it will be higher in the sky 

[Mark at Beaufort]

2 minutes ago, michael.h.f.wilkinson said:

I will be off to Italy shortly, so hopefully it will be a bit easier, as it will be higher in the sky 

Nice Michael - is this work or holiday?

[michael.h.f.wilkinson]

Just now, Mark at Beaufort said:

Nice Michael - is this work or holiday?

Holiday, much needed

[Littleguy80]

I managed to observe this last night. It seemed brighter than mag 12.8 initially and I started to doubt I was seeing it. I did some testing on nearby stars of similar mag and decided it was about right. Very close to the centre of the host galaxy which gave a nice ghostly glow. Many thanks to@michael.h.f.wilkinson for the heads up. 

[Mark at Beaufort]

Well done Neil I really must try and stay awake. Unfortunately it takes awhile for this galaxy to clear my rooftop.

 

 

[Littleguy80]

1 hour ago, Mark at Beaufort said:

Well done Neil I really must try and stay awake. Unfortunately it takes awhile for this galaxy to clear my rooftop.

 

 

Thanks Mark. It was only just above the rooftops when I caught it last night. It was around 00:40 so it’s bright enough that you don’t need it to get really high in the sky. 

[Wyvern]

Hi all,

Piccy from this morning.

Les.

[John]

2 hours ago, Mark at Beaufort said:

Well done Neil I really must try and stay awake. Unfortunately it takes awhile for this galaxy to clear my rooftop.

 

 

Well done indeed Neil

I have a similar problem to Mark - that corner of the square of Pegasus is visible for a while but it's low down at that point and affected by the Bristol light pollution, then it is behind conifers for a good 2-3 hours before being visible again, and better positioned for finding a galaxy of course

It sounds a good SN though - worth some effort

[Pixies]

Had a shot tonight.. had to wait until 02:30-ish before it rises over the house, so the sky was getting light again. Some high clouds were threatening too.

The galaxy NGC7814 was barely visible with averted vision. I really need to try this with a dark sky. Les' photo tied-in with Sky Safari and really helped locate it.

As I (avertedly) watched, a very faint point of light was popping in and out, at the centre of the galaxy. I think that was it, but can't be certain. No way I can try to estimate magnitude.

[Paul M]

Here is my effort in capturing this supernova from this morning:

21 x 30 sec   250PDS Newt, ASI178 camera  Optolong L Pro Filter

It's easy to lose the SN in the galaxy's core by pushing to get more detail in the outer galaxy. So the galaxy remains subdued!

Edited July 19, 2021 by Paul M

[Littleguy80]

2 hours ago, Paul M said:

Here is my effort in capturing this supernova from this morning:

21 x 30 sec   250PDS Newt, ASI178 camera  Optolong L Pro Filter

It's easy to lose the SN in the galaxy's core by pushing to get more detail in the outer galaxy. So the galaxy remains subdued!

Looks great, Paul  

[tomato]

Here is one hour of Lum integration from last night, taken with Esprit 150/ASI 178. The object was very low down for me  but the SN is still quite distinct through the murk.

 

[Wyvern]

My effort from this morning with v poor seeing conditions. At least managed to grab the SN although C43 is virtualy lost to view in comparison with the image from 17th July.

Regards to all,

Les