31 replies to this topic

[agavephoto]

There's a supernova in M100 for anyone interested: SN2020oi is near the core, 14.6 magnitude as of 2020.01.13, and rising.

Edited by agavephoto, 13 January 2020 - 03:58 PM.

[Jim Davis]

Do you have a link to the information?

[Dave Mitsky]

Here's what I've found on SN 202oi.

 

2020oi (= ZTF20aaelulu), TNS discovered 2020/01/07.542 by Zwicky Transient Facility (ZTF)
Found in M100 at R.A. = 12h22m54s.925, Decl. = +15°49'25".05
Located 1".3 east and 6".5 north of the center of M100 (K. Itagaki image) (Sano Yasuo image) (Paolo Campaner image)
Mag 14.6:1/12, Type Ic (z=0.005) (zhost=0.005240)

http://www.rochester...y.org/snimages/

 

https://wis-tns.weiz...l/object/2020oi

 

https://wis-tns.weiz.../discovery-cert

 

https://www.flickr.c...es/49377003616/ (best image)

[Dave Mitsky]

This is the sixth supernova to be discovered in M100.

https://www.messier-...om/messier-100/

 

http://www.messier.s...org/m/m100.html

[evan9162]

There was one last year in M100 too (SN 2019ehk), so the above links were already out of date.

 

Here's my image of SN 2019ehk:

 

 

 

 

SN 2020oi looks to be in the core...I'll take a shot at imaging it if the skies ever clear up here again...

Edited by evan9162, 13 January 2020 - 06:34 PM.

[Allan Wade]

Let’s hope no one was too close to it.

[Araguaia]

There was one last year in M100 too (SN 2019ehk), so the above links were already out of date.

 

 

 Two in 2 years, and we get none in 400... the Universe is unfair.

[Dave Mitsky]

SN2020oi in M100 has brightened to magnitude 13.2 already! 

 

http://www.rochester...Y6uY7ghSnw-Ghw8

 

2020oi (=ZTF20aaelulu), TNS discovered 2020/01/07.542 by Zwicky Transient Facility (ZTF)

Found in M100 at R.A. = 12h22m54s.925, Decl. = +15°49'25".05
Located 1".3 east and 6".5 north of the center of M100 (K. Itagaki image) (Sano Yasuo image) (Paolo Campaner image) (Paolo Campaner image) (Paolo Campaner image)
Mag 13.2:1/14, Type Ic (z=0.005) (zhost=0.005240)

 

https://www.flickr.c...es/49387442802/

[Araguaia]

I see myself getting up before dawn in a few days, once the moon is out of the way of Coma...

[Rich (RLTYS)]

I'm going to try to image SN 2020oi tomorrow morning using the Slooh Robotic Observatory. 

[Pcbessa]

I will try this tomorrow. Just came inside after hours exploring between Orion and Monoceros. Once I read this I almost took the scope again outside. But the moon is up, so galaxies will be fainter now. Tomorrow I will try it. This might be my first observed supernova.

[Pcbessa]

Just went outside and has a look at 100-600x.
Can't say I saw anything clearly.
Maybe...
I only saw the central part of the galaxy due to proximity to moon
The galaxy core looked partly dual, so it might have been the supernova. This is a difficult one.
Being 6" away from the galaxy core, it should resolve as easy as Castor, as distance to the core is similar.

Anyone else tried it?

[Araguaia]

To me this will not be doable before the Moon is gone.  I understand this SN is close to the bright core, and I have a hard time seen detail at the limit in any moonlight.   

[alanjgreen]

I was out last night for the first time in 2020!
My main focus had been the Orion area but by 0100am it had moved too far west of the shed, so I had a great time with the Eskimo nebula (that’s another story) before trying to centre the three current supernovae in Virgo.

 

The only galaxy of the three that I could reach (with the dob from the shed) was M100 and I am pleased to report that this is a bright (mag greater than 13.2) type 1c.

 

As soon as you see M100, the SN is obvious and much brighter than the core it sits beside.

 

I was using the 20” and recorded the following results using a night vision device connected to various eyepieces:

- 18.2mm Delite (x111 magnification), easy split from core, no galaxy extension or arms seen (this is a large physical galaxy when seen in all its glory).

- 27mm Panoptic (x75), split ok, no arms seen but galaxy is now a larger patch.

- 35mm Panoptic (x59), SN is very close to the core but easy to see as it’s so much brighter. I now see the full scale of M100 but the arms remain just beyond reach.

 

I encourage everyone to give this a try as it is bright.

 

Clear skies,

Alan

Edited by alanjgreen, 18 January 2020 - 05:41 AM.

[Pcbessa]

Two nights ago I reported potentially seeing it with my 10". The galaxy was near the moon, hence much fainted than usual. Still I saw something like a dual core. Tonight it must be visible much better I reckon!

[Pcbessa]

I tried again yesterday.
This is a very difficult one.
I an not even sure I saw it

I stared at M100 for more than an hour at100-600x, in dark skies, and couldn't see anything other than the elongated core, the mottled outer halo and faint stars around.

The bright halo washes out the mag14 supernova,making it impossible to resolve it in my 10".

Seeing was fine yesterday.
I don't think it is at mag13.2 to be honest...

At 100x the outer halo remains visible, at 300 or 600x just the core and a bit around.

[timokarhula]

I viewed SN2020oi in M100 this morning along with two other supernovae (SN2020ue in NGC4636 and SN2019yvq in NGC4441) with my 12-inch Dob.  SN2020oi lies only 6.6 seconds of arc from the nucleus of the galaxy so I had to employ 300x power to be able to see a double nucleus.  The supernova lies just north of the true, fainter nucleus.  It was 6 years ago I saw a supernova belonging to a Messier-galaxy (M82).  I also saw the neighbouring galaxies IC783, IC3313 and MCG+3-32-32 (mag 15.3) among other NGC-galaxies which I had observed earlier.  I estimated SN2020oi to be of magnitude 13.1.

 

/Timo Karhula

[Rich (RLTYS)]

Here's my image of SN 2020oi taken with the Slooh Robotic Observatory, using the shortest exposure I could without overexposing the central core.

Attached Thumbnails

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[Endymion]

Here's a luminance only image I took last night of SN2020oi in M100.   You can see the supernova to the right of the core.   After taking the images, I tried visual; however, by that time the moon was up and there is a lot of light pollution so the best I could do was imaging I might be seeing it with averted vision  .

 

 

 

 

C11EdgeHD at f/10 with ASI1600  Gain 300, Offset 21

Stack of 5 120s Lum images, very gently stretched

Edited by Endymion, 20 January 2020 - 12:24 AM.

[Endymion]

Here's a better picture using RGBL.  This weekend I plan to be at a dark site to see if I can visually observe it with a 18" f/4.2.

 

[akroes]

Is there an approved procedure for submitting brightness data to the AAVSO for Supernovae?  I routinely submit data on 'regular' variables, novae, and CV's to them, but while I see references to supernova, and some (very outdated) alerts when browsing their site, I see nothing current and their search tool doesn't find any supernova designations for any format I try (SN2020oi, SN 2020oi, 2020oi, etc.)

[OJS]

Yes, I too find it odd that there doesn't seem to be anything about this nova on the AAVSO. Checked their forum discussions, and nothing there. I used to submit to them too, and in fact have a few hundred observations in a log book that I never submitted!

[Rich (RLTYS)]

The only SN that the AAVSO has released recently is a chart for SN 2020ue in NGC 4636. Here's a chart of this bright SN. (Not trying to change the subject.)

Attached Thumbnails

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[akroes]

No, that's perfect!  SN 2020ue is another one I have been taking images of lately (along with 2019yvr and 2019yvq). I only happened to start my AAVSO data search for 2020oi and stopped looking when I couldn't find even a notice of it's existence there, much less finder charts or previously submitted data points from other observers

 

Thanks!

[Rich (RLTYS)]

I think the AAVSO will only publish charts for brighter and easy to observe SN. It can be frustrating.