114 replies to this topic

[PeterAB]

I just finished up a pleasant night of observing.    Nice weather.   Seeing very good.  Transparency to almost m4 with my naked eyes. 

 

Most interesting is the supernova in NCG 4647.   This was discovered on April 16 2022.    I am pleased that this object is easy to observe with my Astro-Tech 102EDL and ASI294 from my driveway in the bright city.    I'm estimating the brightness at around m14 or a little brighter tonight.

 

Most definitely worth taking a look at.   My total exposure was fairly long.   That was just to bring out detail on NGC 4647.   the nova was visible in a minute.

 

NCG 4647 with supernova 2022hrs marked.    North up, east left.   M60 is the bright galaxy SW.   Cropped 50%.  1530 seconds (102x15s).   Gain 130.

 

 

Full size for context.   1.5 x 1 degree

 

Peter

Edited by PeterAB, 22 April 2022 - 01:31 AM.

[EmeraldHills]

Wow Peter. Well done. Was this with your 90mm or with your 127? Thanks for sharing!

[alphatripleplus]

Nice. I'll have to look if I have any before and after captures of the galaxy as this was on my observing list.

[Tfer]

This was from 2 weeks ago.  The larger galaxy is M60.

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[steveincolo]

Thanks, Peter, for the heads up!   Here's a view from last night.  

 

[PeterAB]

Wow Peter. Well done. Was this with your 90mm or with your 127? Thanks for sharing!

I used my Astro-Tech 102mm f7 refractor (this was missing from my equipment list).    I think my 127mm Mak would have worked as well.   I would have used it with the ASI294 in bin2 mode for a more reasonable pixel scale given my unguided mount and seeing.    I would not have needed to crop to the image to 50% as the binning already did that work.    I think the final view would have been the same.

 

Peter

Edited by PeterAB, 22 April 2022 - 10:08 AM.

[SchoolMaster]

I'm going out tonight with 80ED/290M on GEM28.  I'll have a look-see.  This is what EAA is all about!

[Larry Mc]

hi all,

I was out thursday night and also imaged M60. Had not yet heard about the SN in NGC4647 until a club member pointed it out to me about an hour ago)

Here's my image of it from my backyard observatory: 8" SCT Fork Mount @ f6.3, ZWO ASI294MC camera, ROI 2072x1410 (then cropped), L-Pro broadband filter, 180 second subs for 30 minutes livestacked. 

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[SchoolMaster]

SVBONY 80ED, GEM28, 2" Optolong UV/IR, PlayerOne Mars M (IMX290M)  image scale 1.07"/px F/7 at 560mm  73F, 10mph gust swirl, clear.

 

Gain 300, 15 sec x 60  Dark (75F), Flat.

 

NGC4647 + Supernova + M60

 

 

Hot off the scope while I'm doing a 30 minute capture.

Edited by SchoolMaster, 22 April 2022 - 09:51 PM.

[Look at the sky 101]

Fantastic images. 

[steveincolo]

SVBONY 80ED, GEM28, 2" Optolong UV/IR, PlayerOne Mars M (IMX290M)  image scale 1.07"/px F/7 at 560mm  73F, 10mph gust swirl, clear.

 

Gain 300, 15 sec x 60  Dark (75F), Flat.

 

NGC4647 + Supernova + M60

 

22AprM60sn-2S8-G300MM-60-15-DF.jpg

 

Hot off the scope while I'm doing a 30 minute capture.

Hasn’t faded much in one night! 

[SchoolMaster]

It will be something to keep an eye on.  I hope to do a capture every week or so, and then have something to show my students.

[Tfer]

Thank you PeterAB.  My first Type 1A supernova!

 

 

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[EmeraldHills]

It has to be mag 10 now, right? It's so bright! Here's a 15-minute EAA video session about it.

 

 

https://youtu.be/w_zN3kWivA0

Edited by EmeraldHills, 23 April 2022 - 02:56 AM.

[Tfer]

It has to be mag 10 now, right? It's so bright! Here's a 15-minute EAA video session about it.

 

SN2022HRS-2022-04-23-500.png

 

https://youtu.be/w_zN3kWivA0

If you look at my capture, there’s a star at about 10:00 (looks to be parallel to another to its right) that seems the same brightness.  According to SkySafari, that star is magnitude 11.

Edited by Tfer, 23 April 2022 - 03:19 AM.

[Tfer]

As a reference, the entire galaxy NGC 4647 has an apparent magnitude of 10.81.  If that SN is magnitude 11, that single object is shining almost as brightly as the entire galaxy that it’s in.

 

Imagine the view from a planet orbiting a nearby star…

[SchoolMaster]

As a reference, the entire galaxy NGC 4647 has an apparent magnitude of 10.81.  If that SN is magnitude 11, that single object is shining almost as brightly as the entire galaxy that it’s in.

 

Imagine the view from a planet orbiting a nearby star…

Not TOO nearby,  That gamma radiation flux could be lethal for 20+ light years, right next door in the greater scheme of things.

[jkmonroe]

I was excited to try and capture this SN so I must not have paid much attention to my leveling.  Oh well, the thing is SUPER BRIGHT and I had no issues with a quick stack of 3s subs.

 

29 frames, 87 seconds, saved as viewed

 

[MartinMeredith]

Thanks, Peter, for the heads up!   Here's a view from last night.  

 

Now that is blue! There's a few more images here:

 

https://www.flickr.c...th/52018089559/

 

and

 

https://www.rocheste.../sn2022hrs.html includes some spectra

Edited by MartinMeredith, 24 April 2022 - 05:04 AM.

[steveincolo]

Now that is blue! There's a few more images here:

 

https://www.flickr.c...th/52018089559/

 

and

 

https://www.rocheste.../sn2022hrs.html includes some spectra

I noticed the blue but hadn't looked for any data, thanks!  The graph of the supernova's evolution over a few days is particularly neat:  https://www.flickr.c...es/52018620313/.

 

I used 20 second subs instead of my typical 10 seconds because I needed more stars for stacking with a narrow FOV, but that blew out the color in the center of the supernova.  Would have been nice to see with some short (i.e. 3 second) subs.  

Edited by steveincolo, 24 April 2022 - 07:18 AM.

[Cey42]

Got a chance to see this last night. Wow, it is bright. My first view of a Type Ia SN. Showed up on the first frame.

Here is a comparison from last year of the same area.

Celestron 8” SCT @ F/6.3 on Celestron Advanced VX mount. ZWO 294MM. Gain 300. 51x6s=5.1min

 

[SchoolMaster]

My most recent pic is this :

 

14 January, C8, Evo, 0.63, ZWO 294MC

 

Gain 350, Flat, Dark, 10 secs x 30.

 

M60 and NGC4647

 

Edited by SchoolMaster, 24 April 2022 - 06:43 PM.

[Tfer]

My ‘before’ pic was April 3/22.

I was just randomly snooping around Virgo and I grabbed a handful of Messier objects.

[herseycart]

Thanks for sharing this.  Had the opportunity last night to EAA observe this SN in NGC 4647 through my AT66ED using my ASI294MC Pro.

 

This is cropped from the SharpCap live stack of 160 x 15 seconds at 121 gain, bin 2x2.

The supernova is very bright and was easy to resolve after just a couple of frames.

 

I have a before picture from March 26, 2022. 

 

The before capture and more details here: http://www.suffolksk...va-in-ngc-4647/

 

Again thanks for sharing and glad I took the time to have a look last night.

 

 

[Alien Observatory]

Caught the M60 SN last night and an April 9, 2022 image. Images are cropped, Stellina, 28 minutes...Pat Utah

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Edited by Alien Observatory, 25 April 2022 - 09:53 AM.