TCP J04291884+4354232 possible nova mag 10.2

Alerts and Monitoring of Novae

Re: TCP J04291884+4354232 possible nova mag 10.2

Postby Robin Leadbeater » Wed Jan 27, 2021 6:25 pm

Paolo Berardi wrote:Hi Robin, the SNR seem to me similar but my exposure time was much longer. Maybe there was a balance between integration time and telescope aperture.


My conditions were quite variable and got worse later in the run. These are the weights that ISIS used. I probably should have given up after #9

Weight for profile #1 : 1.0000
Weight for profile #2 : 0.9733
Weight for profile #3 : 0.9283
Weight for profile #4 : 0.7249
Weight for profile #5 : 0.6639
Weight for profile #6 : 0.8095
Weight for profile #7 : 0.7645
Weight for profile #8 : 0.7606
Weight for profile #9 : 0.6367
Weight for profile #10 : 0.5335
Weight for profile #11 : 0.5104
Weight for profile #12 : 0.4574
Weight for profile #13 : 0.4499
Weight for profile #14 : 0.4485
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
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Re: TCP J04291884+4354232 possible nova mag 10.2

Postby Paolo Berardi » Wed Jan 27, 2021 10:43 pm

My conditions were quite variable and got worse later in the run

Hi Robin, it's a pity the progressive signal deterioration. With such a faint target it can certainly change the result.

The same data for my spectro session are below. I think the cause of some variations can be attributed to atmospheric turbulence. During the observation I happened to see the guide star image get bigger and blurry for some time (on average the seeing was good). My observatory is located close to buildings which emanate heat during the night.

Weight for profile #1 : 0.9090
Weight for profile #2 : 0.8621
Weight for profile #3 : 0.8777
Weight for profile #4 : 0.9882
Weight for profile #5 : 0.9459
Weight for profile #6 : 1.0000
Weight for profile #7 : 0.7791
Weight for profile #8 : 0.7108
Weight for profile #9 : 0.7204
Weight for profile #10 : 0.7760
Weight for profile #11 : 0.8036
Weight for profile #12 : 0.7351

Paolo
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Re: TCP J04291884+4354232 possible nova mag 10.2

Postby James Foster » Mon Feb 01, 2021 9:10 am

Here's my contribution "recently" (before I got started testing another spectroscope) of Nova Per 2020, taken on
04Jan21 with the LISA-IR and 05Jan21 with my Alpy600 with the modified CCDwindow on my Atik 414ex (3625-9600A):

With Possible line identifications:
Image
(Note: All identified lines are tentative with the exceptions of the balmer and telluric lines)

Without line identifications:
Image

As mentioned recently, the Nova is now below 15.5V magnitude, which I confirmed last night with a photometry run (btw storms) on my C-11
at F/6.3 using Astrodon photometric BVI filters....will post my Nov20-Jan21 photometry data to AASVO in the next few days.

James
James Foster
eShel2
Lhires III (2400/1800/600 ln/mm Grat) Spectroscope,
LISA IR/Visual Spectroscope (IR Configured Presently)
Alpy 600 with Guide/Calibration modules and Photometric slit
Star Analyzer 200
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Re: TCP J04291884+4354232 possible nova mag 10.2

Postby Robin Leadbeater » Mon Feb 01, 2021 8:14 pm

A very noisy, very low resolution (R~130) spectrum with the ALPY200 in bright moonlight and haze

Cheers
Robin

novaper2020_20210130_988_Leadbeater.png
novaper2020_20210130_988_Leadbeater.png (23.6 KiB) Viewed 2113 times
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
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Re: TCP J04291884+4354232 possible nova mag 10.2

Postby Paolo Berardi » Tue Feb 02, 2021 10:17 pm

Hi all,
a fresh spectrum of the nova (just completed).

Image

H-alpha emission line is still very strong but its profile has changed a lot in two weeks.

Image

Clear sky!
Paolo
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Re: TCP J04291884+4354232 possible nova mag 10.2

Postby Christophe Boussin » Sat Feb 06, 2021 7:34 pm

Hello all,

Impressive result on such a faint target Paolo and congratulations to all for your spectra !
Nova Per 2020 is a more and more challenging target !

Here is my new update for the monitoring of the nova Per 2020 (finally a new clear sky for several days...). The following spectrum of the Nova Per 2020 was obtained the 3rd of February at 22 h 57 TU with my Alpy 600 (resolution of 516, JJ = 2459249.4564) and an acquisition time of 120 min :

_novaper2020_20210203_956_Christophe Boussin_3750_7565.png
Nova Per 2020 on February 3rd, 2021
_novaper2020_20210203_956_Christophe Boussin_3750_7565.png (65.51 KiB) Viewed 1971 times

What a change since my last spectrum on January 10th !
According to the AAVSO website, the magnitude of the Nova is now close to 16, a drop of 3 magnitudes since my previous observation !!

NOVAPER2020_AAVSO.JPG
Light curve of the Nova PER 2020 (AAVSO)

The spectrum obtained is noisy but several changes are clearly visible :

novaper2020_20210203_956_Christophe Boussin.png
Nova Per 2020 on December 6th, 15th, 17th, 18th, 2020 ; on January 9th, 10th and on February 3rd, 2021 (identification of some lines from PlotSpectra).

It seems to me that the lines [OII] at 7320A and 7325A are now visible in the spectrum... is that correct?
The relative intensity of the "blue" part of the Halpha line is now very clearly greater than the "red" part :

novaper2020_20210203_956_Christophe Boussin_Halpha.png
Nova Per 2020 on December 6th, 15th, 17th, 18th, 2020 ; on January 9th, 10th and on February 3rd, 2021 (Halpha line).
novaper2020_20210203_956_Christophe Boussin_Halpha.png (43.1 KiB) Viewed 1971 times

The increase in the relative intensity of the [OI] line at 6300A is more and more visible :

novaper2020_20210203_956_Christophe Boussin_OI.png
Nova Per 2020 on December 6th, 15th, 17th, 18th, 2020 ; on January 9th, 10th and on February 3rd, 2021 ([OI] line).
novaper2020_20210203_956_Christophe Boussin_OI.png (45.6 KiB) Viewed 1971 times


Clear skies,

Christophe BOUSSIN
CBO (Newton 200 F/5 / Alpy600 / Atik 314L+ / Atik Titan + Mewlon 180 F/12 / LHIRES III 2400 / Atik 460EX / Atik 314 L+) @ ARAS database
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Re: TCP J04291884+4354232 possible nova mag 10.2

Postby John Coffin » Wed Feb 10, 2021 11:35 pm

I couldn't find Nova Per tonight (10th February) using an 8 inch SCT. I see there are no entries on AAVSO since 8th February when V band magnitude was 16.1
What's amazing is that the group has managed to collect spectra of this faint object for so long.
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Re: TCP J04291884+4354232 possible nova mag 10.2

Postby Robin Leadbeater » Fri Feb 12, 2021 3:43 pm

Another very low (R~130) resolution spectrum last night with the ALPY 200

novaper2020_20210211_824_Leadbeater.png
novaper2020_20210211_824_Leadbeater.png (19.69 KiB) Viewed 1789 times


Robin
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
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Re: TCP J04291884+4354232 possible nova mag 10.2

Postby Christophe Boussin » Sun Feb 14, 2021 12:16 pm

Hello all,

On a very starry night but also very cold night (!!), I succeeded, once again, to position the nova in the slit of my Alpy 600 spectrograph, but the exercise is becoming more and more difficult !
champ_novaper2020_210212.png
Guiding camera field
champ_novaper2020_210212.png (190.1 KiB) Viewed 1724 times

According to AAVSO, at the time of observation, the magnitude of the nova is still 16...
NOVAPER2020_AAVSO.JPG
Light curve of the Nova PER 2020 (AAVSO)

The following spectrum of the Nova Per 2020 was obtained the 12th of February at 21 h 48 TU with my Alpy 600 (resolution of 518, JJ = 2459258.4083) and an acquisition time of 80 min (8 x 600s) :
_novaper2020_20210212_908_Christophe Boussin_3750_7565.png
Nova Per 2020 on February 12th, 2021
_novaper2020_20210212_908_Christophe Boussin_3750_7565.png (80.2 KiB) Viewed 1724 times

novaper2020_20210212_908_Christophe Boussin.png
Nova Per 2020 on February 12th, 2021 (identification of some lines from PlotSpectra)

The spectrum is noisy but it seems to me that the [OIII] lines are starting to be visible...
novaper2020_20210212_908_Christophe Boussin_zoom.png
Nova Per 2020 on February 12th, 2021 (zoom)


Clear skies,

Christophe BOUSSIN
CBO (Newton 200 F/5 / Alpy600 / Atik 314L+ / Atik Titan + Mewlon 180 F/12 / LHIRES III 2400 / Atik 460EX / Atik 314 L+) @ ARAS database
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Re: TCP J04291884+4354232 possible nova mag 10.2

Postby Paolo Berardi » Sun Feb 14, 2021 6:48 pm

Congratulations for your very nice spectra! The nova is so faint...

In the latest spectra it seems the [O III] doublet has grown. The broad 5007A line is clear (prominent blue peak), the 4959A line is weaker but visible. Typical intensity ratio is ~3:1.

Here snow, cold, wind...

Clear sky!
Paolo
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