Eruption of recurrent nova V3890 Sgr

Alerts and Monitoring of Novae

Re: Eruption of recurrent nova V3890 Sgr

Postby Terry Bohlsen » Tue Sep 03, 2019 7:16 am

A further spectrum. Quite a change in 2 days.
Terry
v3890sgr_composite.png
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Re: Eruption of recurrent nova V3890 Sgr

Postby Joan Guarro Flo » Wed Sep 04, 2019 3:25 pm

Hi,

After three days that every evening after sunset the sky became cloudy, yesterday night fortunately I had a sky clean and good conditions.

So last night I observed HR6700 and V3890 Sgr at same time with the LINX from Sta. Maria and NOU_T from Piera.

These are the results.

Joan.
Attachments
_4V3890SGR_A.png
_4V3890SGR_A.png (17.41 KiB) Viewed 3324 times
_4V3890SGR_B.png
_4V3890SGR_B.png (21.59 KiB) Viewed 3324 times
_4V3890SGR_C.png
_4V3890SGR_C.png (21.81 KiB) Viewed 3324 times
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Re: Eruption of recurrent nova V3890 Sgr

Postby Joan Guarro Flo » Wed Sep 04, 2019 4:30 pm

Hi,

And.

JG.
Attachments
_4V3890SGR_D.png
_4V3890SGR_D.png (22.38 KiB) Viewed 3319 times
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Re: Eruption of recurrent nova V3890 Sgr

Postby Francois Teyssier » Thu Sep 05, 2019 5:16 am

Congratulations, Joan!

An update of the evolution with low res spectra

V3890Sgr.png
V3890Sgr.png (89.15 KiB) Viewed 3290 times


He III 4686 and the blend NIII/CIII are now obvious. The radiation is strengthening as the remaining envelop is receding
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Re: Eruption of recurrent nova V3890 Sgr

Postby umberto sollecchia » Sat Sep 07, 2019 1:57 pm

Bonjour à tous, voici ma nouvelle contribution.Une légère augmentation d'intensité.
Umberto

v3890sgr_20190906_785_U. Sollecchia.png
v3890sgr_20190906_785_U. Sollecchia.png (31.23 KiB) Viewed 3231 times


Comparison
v3890sgr_20190906_785_ Comparazione -Umberto Sollecchia.png
v3890sgr_20190906_785_ Comparazione -Umberto Sollecchia.png (43.58 KiB) Viewed 3230 times
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Re: Eruption of recurrent nova V3890 Sgr

Postby Francois Teyssier » Sat Sep 07, 2019 4:38 pm

A list of high ionization lines which could be observed in the next few days

list.PNG
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Re: Eruption of recurrent nova V3890 Sgr

Postby Francois Teyssier » Tue Sep 10, 2019 4:36 pm

The evolution of the nova
LISA Spectra (Pavel & Woody)

V3890Sgr.png
V3890Sgr.png (111.37 KiB) Viewed 3151 times




François
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Re: Eruption of recurrent nova V3890 Sgr

Postby umberto sollecchia » Wed Sep 11, 2019 8:53 am

Bonjour à tous, placé le profil de la nuit dernière 10-09-2019 et une comparaison avec le jour 06-09-2019.
Umberto

v3890sgr_20190910_775_ U. Sollecchia.png
v3890sgr_20190910_775_ U. Sollecchia.png (28.98 KiB) Viewed 3122 times


v3890sgr_20190910_775 - Comparison - U. Sollecchia.png
v3890sgr_20190910_775 - Comparison - U. Sollecchia.png (32.02 KiB) Viewed 3122 times
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Re: Eruption of recurrent nova V3890 Sgr

Postby Francois Teyssier » Sat Sep 14, 2019 5:00 am

The ATel

ATEL #13108 ATEL #13108

Title: Continuing optical spectroscopic observations by the ARAS
Group of the symbiotic-like recurrent nova V3890 Sgr
Author: Forrest Sims, Terry Bohlsen, Paolo Cazzato, Pavol A. Dubovski,
Joao Guarro Flo, Olivier Garde, Paul Luckas, Umberto Sollecchia,
G. Arlic, M. Leveque, J. Souchu, JP. Nougayrede *ARAS Group)
Queries: shore@df.unipi.it
Posted: 14 Sep 2019; 04:30 UT
Subjects:Nova

We report the results of our continuing optical low and medium resolution
spectroscopic monitoring of the symbiotic-like recurrent nova V3890 Sgr
(see ATel #13062 for first report, #13099 for most recent optical description).
The spectra cover the period from 2019 Aug. 28.7 UT to Sep. 12.2 UT with
resolutions from 500 to 11000 in th spectral window 3700-7300A, exposure
times of 1100 to 14000 sec, and S/N ranging from a low of about 20 to about
100 (peak line fluxes). The period before Sep. 9 UT has been described
in earlier ATels by several groups, here we report the most recent changes.
The Fe II and related ions (e.g., Ti II) are distributed throughout the
optical spectrum, with several prominent Fe II multiplets (e.g., 27, 28,
41, 42, 46, 48, 49, 74), the lines are not resolved (a gaussian fit yields
sigma ~ 150 km/s, for R=1000). This was also found for He I (4023, 4471,
4922, 5015, 5876, 6678, 7065), He II (4200, 4686, 5411). The Balmer lines,
especially H-alpha and H-beta, have low broad wings (HWZI = 4000 km/s)
with shoulders (there is a distinct pedestal to the broad profile) and
a narrower component (sigma ~ 270 km/s) giving all Balmer lines a "prussian
helmet" form typical of the pre-breakout spectra of this type of nova.
The [Fe XIV] 5303 line appeared after Sep. 9.1UT and before Sep. 10.3UT;
the first spectrum showed only Fe II 5315, thereafter the 5303A line increased
to about twice the flux of the Fe II line. This is the only major change
in the spectrum in the last week detected in our data. The N III 4636 feature
has remained the same relative to He II since Sep. 5.8UT (about half the
flux). There is no indication of any [O I], [N II], [O III], or [Ar III],
nor is there any obvious [Fe VI] or [Fe VII] emission (5276A is at best
a blend with Fe II). The spectrum now resembles a strongly photoionized
wind, in many ways similar to the spectra of V407 Cyg from about two to
three weeks after outburst, with the exception of the [Fe XIV] line in
V3890 Sgr. Observations are continuing. Below, for convenience, we include
a list of the lines measured in the last spectra, most of which have not
strongly varied since Sep., 9.0.

4023.4 He I
4100.1 H delta
4175.8 Fe II (28)
4198.0 He II
4232.1 Fe II (27)
4340.6 H gamma
4350.7 Fe II (27)
4385.7 Fe II (27)
4413.6 [Fe II]
4472.1 He I
4413.2 Fe II (27)
4472.6 He I
4516.9 Fe II (27)
4551.4 Fe II (28), Fe II (37)
4584.2 Fe II (38)
4637.4 Fe II (37)
4685.2 He II
4712.7 He I
4731.3 Fe II
4861.5 H beta
4922.6 He I, Fe II (42)
4993.4 Fe II
5016.4 He I, Fe II (42)
5168.8 Fe II (42)
5183.8 Ti II
5197.2 Fe II (49)
5234.4 Fe II (49)
5276.0 Fe II (49), [Fe VII]?
5283.1 Fe II (41)
5301.6 [Fe XIV]
5315.8 Fe II (48.49)
5361.9 Fe II (48)
5411.6 He II
5532.5 ?
5678.5 N II
5875.1 He I
5890.0 Na I (ISM)
5989.9 Fe II (46)
6029.2 ?
6040.0 ?
6084.5 Fe II (46)
6105.8 ?
6126.0 ?
6147.3 Fe II (74)
6155.8 Fe II
6181.3 [Fe II]
6238.7 Fe II
6247.2 Fe II (74)
6317.3 Fe II
6346.0 Fe II (74)
6372.5 [Fe X]?
6403.4 [Fe II]
6432.0 Fe II
6492.6 Fe II
6516.0 Fe II
6562.0 H alpha
6608.0 Ti II
6636.8 Ti II
6677.1 He I
6828.2 Fe II
6915.4 ?
6979.2 Ti II
7064.1 He I
7220.7 Fe II
7281.6 He I

ARAS Nova Database: http:/www.astrosurf.com/aras/Aras_DataBase/Novae.htm
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Re: Eruption of recurrent nova V3890 Sgr

Postby Francois Teyssier » Sat Sep 14, 2019 8:18 am

An update of the monitoring
LISA spectra obtained by Woody and Pavol
V3890Sgr.png
V3890Sgr.png (132.84 KiB) Viewed 3006 times

Note the gradual increasing of high ionized lines.
About "6830" line, it is increasing too andbroader than other lines.
In order to identify it as Raman OVI, medium resolution spectra (say Lhires III 600 l/mm) with good SNR (100) should be very welcome.

François
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