Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

N CAS 2020

  • Please log in to reply
52 replies to this topic

#26 KMAO

KMAO

    Sputnik

  • -----
  • topic starter
  • Posts: 37
  • Joined: 24 May 2020

Posted 24 August 2020 - 05:36 AM

This Nova is changing rather fast.

Interesting object.

KMA


  • Rich5567 likes this

#27 Rich5567

Rich5567

    Vostok 1

  • -----
  • Posts: 126
  • Joined: 18 Apr 2020
  • Loc: Hornsea. East Yorkshire. England. U.K

Posted 24 August 2020 - 01:52 PM

This Nova is changing rather fast.

Interesting object.

KMA

I agree, it will be interesting to see if it gets brighter again.

 

Last night (23/8/20) I had an estimate of 12.2mv at 21:30 UTC. Its clear again tonight and the sun will be set soon, so it shall be my first target of the session.

 

Clear skies to you.waytogo.gif

 

Rich.


Edited by Rich5567, 24 August 2020 - 01:53 PM.

  • flt158 likes this

#28 Rich (RLTYS)

Rich (RLTYS)

    Fly Me to the Moon

  • *****
  • Posts: 7,174
  • Joined: 18 Dec 2004
  • Loc: Glen Burnie (Maryland)

Posted 25 August 2020 - 03:39 PM

I've been observing N Cas 2020 on an almost every day and it's proving to be most interesting.

Attached Thumbnails

  • Lightcurve 8-23-20.png

  • ssmith, Jamey L Jenkins, flt158 and 1 other like this

#29 KMAO

KMAO

    Sputnik

  • -----
  • topic starter
  • Posts: 37
  • Joined: 24 May 2020

Posted 26 August 2020 - 12:51 PM

Very impressive set of observations Rich
really remarkable.
Best wishes
KMA

#30 Rich (RLTYS)

Rich (RLTYS)

    Fly Me to the Moon

  • *****
  • Posts: 7,174
  • Joined: 18 Dec 2004
  • Loc: Glen Burnie (Maryland)

Posted 04 September 2020 - 03:21 PM

N Cas continues to be an interesting, active, Nova.

Attached Thumbnails

  • Lightcurve 9-4-20.png

  • ssmith likes this

#31 ssmith

ssmith

    Viking 1

  • *****
  • Posts: 859
  • Joined: 28 Jun 2012
  • Loc: Colorado

Posted 06 September 2020 - 11:47 AM

The undulating light curve of this nova is fascinating. Has anyone seen an explanation from the experts to account for its behaviour?

 

I went out and photographed the nova for a second time on the evening of Sept 1 and measured its magnitude at 12.9.

 

I have attached a PANSTARRS image on which I have located the progenitor star which has an i mag of ~21.3.

 

The second image is the PANSTARRS image with my plate-solved image overlayed on top.

 

Nova Panstarrs Before.jpg

 

Nova Panstarrs.jpg


Edited by ssmith, 06 September 2020 - 07:53 PM.

  • VanJan, flt158, dhkaiser and 1 other like this

#32 Rich5567

Rich5567

    Vostok 1

  • -----
  • Posts: 126
  • Joined: 18 Apr 2020
  • Loc: Hornsea. East Yorkshire. England. U.K

Posted 14 September 2020 - 06:22 AM

Nova Cas 2020, (now V1391 CAS) appears to have brightened since my last observation.

 

I had an estimate of <12.6mv on the 8th September, and last night (13th) I made an estimate of 12.2mv.

 

Looks like its on the rise again?.


Edited by Rich5567, 14 September 2020 - 06:22 AM.

  • flt158 and dhkaiser like this

#33 KMAO

KMAO

    Sputnik

  • -----
  • topic starter
  • Posts: 37
  • Joined: 24 May 2020

Posted 16 September 2020 - 12:07 PM

Looking at AAVSO reports for last two days,

Nova Cas 2020  is indeed brightening  slowly.

Unfortunately KMA Observatory is for the last two days under hazy

 clouds ...........

 

Best observing

KMA


  • Jamey L Jenkins, flt158 and Rich5567 like this

#34 Rich (RLTYS)

Rich (RLTYS)

    Fly Me to the Moon

  • *****
  • Posts: 7,174
  • Joined: 18 Dec 2004
  • Loc: Glen Burnie (Maryland)

Posted 17 September 2020 - 03:42 PM

I've not been able to recently observe N Cas 2020 (V1319 Cas) because on continuing bad weather. frown.gif


  • flt158 likes this

#35 cometchaserde

cometchaserde

    Vendor (cometchaserde)

  • -----
  • Vendors
  • Posts: 27
  • Joined: 06 Jul 2009

Posted 19 September 2020 - 03:30 PM

Hi,

 

the Nova is still bright. Images taken on 15.09.2020 and 18.09.2020

 

 

Stefan

Attached Thumbnails

  • NOVA-CAS-2020-15092020-120sek-231424-small.jpg

Edited by cometchaserde, 19 September 2020 - 03:32 PM.

  • flt158 and Rich5567 like this

#36 KMAO

KMAO

    Sputnik

  • -----
  • topic starter
  • Posts: 37
  • Joined: 24 May 2020

Posted 19 September 2020 - 06:21 PM

Very nice photo indeed

hope you do not mind my

conversion into a chart form.

May I ask how the photo was made ?

Best sky wishes

KMA

Attached Thumbnails

  • photo N Cas north up.jpg

  • flt158 and Rich5567 like this

#37 Rich5567

Rich5567

    Vostok 1

  • -----
  • Posts: 126
  • Joined: 18 Apr 2020
  • Loc: Hornsea. East Yorkshire. England. U.K

Posted 20 September 2020 - 12:45 PM

My estimates of V1391 CAS over the last few nights, (the 17th, 18th and 19th) have seen it staying around 12.3mv.

 

Wonder how long it will stay visible.

 

Rich.


  • flt158 likes this

#38 BrooksObs

BrooksObs

    Gemini

  • *****
  • Posts: 3,212
  • Joined: 08 Dec 2012

Posted 20 September 2020 - 03:13 PM

My estimates of V1391 CAS over the last few nights, (the 17th, 18th and 19th) have seen it staying around 12.3mv.

 

Wonder how long it will stay visible.

 

Rich.

Rich - last I read, V1391 Cas appears to be an Fe (iron) type nova. These are often characterized by very protracted maxima lasting many months with only an overall very slow, highly irregular decline. These maxima sometimes end in an abrupt fall  amounting to a number of magnitudes, only to recover almost fully weeks later. They subsequently fade slowly and quite steadily back to minimum thereafter.

 

BrooksObs


Edited by BrooksObs, 20 September 2020 - 03:14 PM.

  • flt158 and Rich5567 like this

#39 cometchaserde

cometchaserde

    Vendor (cometchaserde)

  • -----
  • Vendors
  • Posts: 27
  • Joined: 06 Jul 2009

Posted 21 September 2020 - 03:00 PM

KMA,

 

I used a 8" f/2.8 Newtonian with a ATIK 383L+ camera.

Exposure time: 120 seconds.

 

Taken from Germany, 30 km south of Stuttgart.

 

Stefan


  • flt158 and Rich5567 like this

#40 KMAO

KMAO

    Sputnik

  • -----
  • topic starter
  • Posts: 37
  • Joined: 24 May 2020

Posted 21 September 2020 - 03:44 PM

Stefan

Thanks for info, really amazing sharpness.

Makes me wonder how non stellar object will look like....

(comet for example).

My last three observations of Nova Cas 2020 did not

show any brightening,  magnitude reported  was  12.8mvis.

But one never knows ......

Best wishes for clear sky

KMA


  • flt158 and Rich5567 like this

#41 KMAO

KMAO

    Sputnik

  • -----
  • topic starter
  • Posts: 37
  • Joined: 24 May 2020

Posted 22 September 2020 - 08:05 AM

As of September 22
this is what is happening
with this Nova...
best regards
KMA

Attached Thumbnails

  • N CAS 2020  US date.png

  • flt158 likes this

#42 Rich5567

Rich5567

    Vostok 1

  • -----
  • Posts: 126
  • Joined: 18 Apr 2020
  • Loc: Hornsea. East Yorkshire. England. U.K

Posted 22 September 2020 - 09:42 AM

Rich - last I read, V1391 Cas appears to be an Fe (iron) type nova. These are often characterized by very protracted maxima lasting many months with only an overall very slow, highly irregular decline. These maxima sometimes end in an abrupt fall  amounting to a number of magnitudes, only to recover almost fully weeks later. They subsequently fade slowly and quite steadily back to minimum thereafter.

 

BrooksObs

Hi,

 

Yes I read that myself on the BAAVSS website. I'm sure it will fade below the magnitude limit of my 8" SCT before long.

 

Last nights estimate of V1391 CAS was 12.4mv.

 

Cheers,

 

Rich.


  • flt158 likes this

#43 cometchaserde

cometchaserde

    Vendor (cometchaserde)

  • -----
  • Vendors
  • Posts: 27
  • Joined: 06 Jul 2009

Posted 02 October 2020 - 02:37 PM

Hi,

the Nova is still 12.0 mag. (measured with Astrometrica).

 

Image from Sept. 30th. 8" f/2.8, 120 sek. ATIK 383L+ CCD.

 

 

 

Nova-Cas-2020-30092020-204330-120sek-small.jpg

 

Stefan


Edited by cometchaserde, 02 October 2020 - 02:40 PM.

  • flt158 likes this

#44 KMAO

KMAO

    Sputnik

  • -----
  • topic starter
  • Posts: 37
  • Joined: 24 May 2020

Posted 03 October 2020 - 01:47 PM

Hi Stefan

nice picture again

and your magnitude report is correct.

Unfortunately I am in rather bad weather

for a few days now.

Looking at LCG1 the nova may be slowly rising again.

With best wishes

KMA

Attached Thumbnails

  • N CAS  2020l.png

  • flt158 likes this

#45 robin_astro

robin_astro

    Apollo

  • -----
  • Posts: 1,065
  • Joined: 18 Dec 2005

Posted 04 October 2020 - 11:13 AM

It is only around mag 12.5 in V  but it is very bright at H alpha,  peaking at about 30x that of the surrounding continuum in this high(ish) (1.3A) resolution spectrum

 

v1391cas_20200925_886_Leadbeater.png

 

and stands out among other emission lines even in this very low (~45A) resolution spectrum

 

V1393_Cas_ALPY200.png

 

v1391castelrem_20201001_877_Leadbeater.png

 

Cheers

Robin


  • RobboK and mwr like this

#46 mwr

mwr

    Mariner 2

  • -----
  • Posts: 234
  • Joined: 12 May 2018
  • Loc: Germany

Posted 04 October 2020 - 12:24 PM


 

and stands out among other emission lines even in this very low (~45A) resolution spectrum

 

Hi Robin,

 

could you comment on the identity of the other emission lines in the near infrared? (in the chapter "Novae" of Walker's Spectral Atlas the NIR region isn't covered at all).

12.5 mag - too faint for my noisy DSLR setup :-(



#47 robin_astro

robin_astro

    Apollo

  • -----
  • Posts: 1,065
  • Joined: 18 Dec 2005

Posted 04 October 2020 - 04:04 PM

Hi Robin,

 

could you comment on the identity of the other emission lines in the near infrared? (in the chapter "Novae" of Walker's Spectral Atlas the NIR region isn't covered at all).

12.5 mag - too faint for my noisy DSLR setup :-(

Francois Teyssier has a list of lines found in Novae on his website here

http://www.astronomi...Raies_Novae.pdf

 

There is some blending going on in my very low resolution spectrum but these higher resolution spectra by Peter Somogyi gives some idea of what is probably there in the IR. (mainly OI and the Calcium II triplet)

http://www.spectro-a...start=40#p14602

http://www.spectro-a...start=60#p14708

and here by Christian Buil

http://www.spectro-a...start=40#p14622

http://www.spectro-a...start=50#p14657

 

These were taken some weeks back though and the spectrum is continuously evolving

 

Cheers

Robin


  • mwr likes this

#48 mwr

mwr

    Mariner 2

  • -----
  • Posts: 234
  • Joined: 12 May 2018
  • Loc: Germany

Posted 05 October 2020 - 11:36 AM

Francois Teyssier has a list of lines found in Novae on his website here

http://www.astronomi...Raies_Novae.pdf

 

There is some blending going on in my very low resolution spectrum but these higher resolution spectra by Peter Somogyi gives some idea of what is probably there in the IR. (mainly OI and the Calcium II triplet)

http://www.spectro-a...start=40#p14602

http://www.spectro-a...start=60#p14708

and here by Christian Buil

http://www.spectro-a...start=40#p14622

http://www.spectro-a...start=50#p14657

 

These were taken some weeks back though and the spectrum is continuously evolving

 

Cheers

Robin

Impressive work by the exceptionally well equipped ARAS group. One could get the impression that all ARAS members belong to the "dual income, no kids" species or did retire rich ;-)



#49 KMAO

KMAO

    Sputnik

  • -----
  • topic starter
  • Posts: 37
  • Joined: 24 May 2020

Posted 09 October 2020 - 07:25 AM

Last night I was lucky enough
to observe V1391 Cas ( N CAS 2020 ) twice.
In about 2 hours this Nova did brighten
from 12.8m visual to 12.1m.
I was a bit hesitant to report on such a rapid rise
( strong moonlight ) but this was confirmed by other two observers.

best wishes
KMA

Attached Thumbnails

  • N CAS 2020  oct9.png

  • smithrrlyr and dhkaiser like this

#50 Rich5567

Rich5567

    Vostok 1

  • -----
  • Posts: 126
  • Joined: 18 Apr 2020
  • Loc: Hornsea. East Yorkshire. England. U.K

Posted 10 October 2020 - 05:03 PM

I also noticed after checking observations on the BAA VSS database the magnitude was fluctuating somewhat (12.1 to 12.5mv.)

 

My observations where:-

 

9/10/20 19:40 UTC 12.2mv

 

10/10/20 20:19 UTC12.2mv.

 

So no changed was noticed from my observations, I had thought I'd seen the last of it, but it looks like its staying around a bit longer. It did drop below my visual threshold for a while, but nice to see the star back.

 

On my next clear night I'll try to observe V1391 early on in the session, and also at the end of the session to see if I note any change in the two or three hours it takes to complete the variables I observe.

 

Rich.


  • dhkaiser likes this


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics