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Supernova SN 2018pv in NGC 3941

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#1 Aquarellia

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Posted 14 February 2018 - 05:32 AM

Here the sketch of this morning 2018/14/02 4:50 UTC made with my refractor 6" f/d 8 EP Vixen 7mm = 172x

This is not very easy, I needed lot of magnification to separate the core from the SN

 

SN_NGC3941_ll.jpg

 

The FOS is +/- 20'

 

Anyway, I like when somethink is moving in the sky!

Michel


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#2 macdonjh

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Posted 14 February 2018 - 07:21 AM

Cool.  It's been cloudy here for more than three weeks, so I haven't seen the supernova.



#3 niteskystargazer

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Posted 14 February 2018 - 09:46 AM

Michel,

 

Good sketch of Supernova SN 2018pv (In NGC 3941) smile.gif .

 

CS,KLU,

 

thanx.gif ,

 

Tom



#4 Special Ed

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Posted 14 February 2018 - 09:49 AM

Michel,

 

Nice catch and sketch.  What is the magnitude?  



#5 Aquarellia

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Posted 14 February 2018 - 12:39 PM

Thank you Mac and Tom

 

Michel,

 

Nice catch and sketch.  What is the magnitude?  

Thank you Michael

Because of the close distance between the core and the SN it's quite difficult to say.

My best visual estimation was 10.7 but I'm waiting confirmation for that.  As far as I know this SN is not yet fading, so if you have an oppotunity to have a look, do it .

Michel


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#6 Jef De Wit

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Posted 16 February 2018 - 09:08 AM

Hi Michel, here's my sketch. I found it a difficult observation with the SN so close to the core of NGC 3941. I needed a magnification of x343 to seperate them (and only at moments of good seeing). Because there is no chart from AAVSO (for the moment?) I didn't make an estimation. But he was weaker than the bright star (+/- mag 12) and a lot brighter than the two small stars (+/- mag 14, I needed averted vision for them).

Attached Thumbnails

  • SN2018pv afgewerkt 600.png

Edited by Jef De Wit, 16 February 2018 - 09:09 AM.

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#7 Aquarellia

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Posted 16 February 2018 - 11:34 AM

Hi Michel, here's my sketch. I found it a difficult observation with the SN so close to the core of NGC 3941. I needed a magnification of x343 to seperate them (and only at moments of good seeing). Because there is no chart from AAVSO (for the moment?) I didn't make an estimation. But he was weaker than the bright star (+/- mag 12) and a lot brighter than the two small stars (+/- mag 14, I needed averted vision for them).

Well done Jef.

The day before I was not really able to separate the two component, just a elongation was clearly visible at 172x with a Barlow 2X that was more easy to see that the magnitude of the two components was similar.  Anyway I saw on internet somewere a picture made the 14th too, the image of the SN was as brillant as the core. And someone says somewere else that this SN must (in relation to the distance) reach +/- magn 11 ?.

So I'm not sure about my estimation but maybe with yours that means that this star is already fading, this is not impossible.

Michel



#8 Jef De Wit

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Posted 16 February 2018 - 12:15 PM

The day before I was not really able to separate the two component, just a elongation was clearly visible at 172x with a Barlow 2X that was more easy to see that the magnitude of the two components was similar.  Anyway I saw on internet somewere a picture made the 14th too, the image of the SN was as brillant as the core.

The SN looked brighter than the core to me (who was not stellar, but maybe a little bit to big in my sketch).



#9 Aquarellia

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Posted 16 February 2018 - 12:31 PM

 

The day before I was not really able to separate the two component, just a elongation was clearly visible at 172x with a Barlow 2X that was more easy to see that the magnitude of the two components was similar.  Anyway I saw on internet somewere a picture made the 14th too, the image of the SN was as brillant as the core.

The SN looked brighter than the core to me (who was not stellar, but maybe a little bit to big in my sketch).

 

Ok, with my only 6" refractor, (facing your 12" reflector), I reach the limit of the possible separation so don't use my estimation as a reference undecided.gif .

 

I like your sketch

Michel



#10 frank5817

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Posted 17 February 2018 - 10:27 AM

Michel,

 

An excellent capture of this supernova near the core of NGC 3941.

Some message to you Jef.

 

Nice capture gentlemen.

 

Frank :)



#11 Aquarellia

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Posted 19 February 2018 - 12:01 AM

Thank you for us Frank

Michel



#12 iainp

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Posted 14 March 2018 - 07:17 AM

I tried to find the SN last night (13th March) but conditions were poor, with lots of moisture in the air bringing the SQM reading down to little better than 20.00. Also I was fighting against the neighbours' security light.

Anyway, at 300x through the 20" dob, only the elongated patch of the galaxy was visible, with an obvious brighter centre. At 600x I began to get hints of the supernova, but with a FOV of around 8' the galaxy flew by and it was very tricky to keep it centred. 

Eventually I could just make out briefly a second brighter area just east of the centre, with hints of its separation from the main body of the galaxy. Luckily I hadn't checked its position online beforehand, so the fact that the sketch matches its actual position gives me confidence I did see it.  West is  to the left. The star on the right side is, I believe, 14.5 magnitude. The sn was significantly fainter than this, even when the star was defocused, so I'd guess the sn was 15 mag or fainter. I've not been able to find any recent updates on it, so any further information welcome!  

If I did imagine the whole thing and it's long gone, please keep it to yourself as it will make  me look silly ;-) 

Iain

Attached Thumbnails

  • sn1.jpg

Edited by iainp, 14 March 2018 - 07:18 AM.

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#13 Aquarellia

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Posted 14 March 2018 - 12:06 PM

Hi Iain

Well done, the last info I founded one week ago (March 8th) is this one (in french but with a photo):

http://www.astrosurf...comment-1509939

 

In the AAVSO database theire are no data.  In fact if we don't ask for any observation entrance for such SN, it's not automatic.

Anyway your estimation looks correct, we are already 1 and a half month from the discovering.

 

Michel



#14 iainp

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Posted 14 March 2018 - 03:30 PM

Thanks Michel, I suspect by the next clear night here it will be long gone! 

Iain 



#15 Sheliak_sp

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Posted 15 March 2018 - 02:44 PM

THank you all for the following, very nice sketches, it must have been a beatiful under clear skies...

 

Migue




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