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Re: Eruption of recurrent nova V3890 Sgr

PostPosted: Tue Sep 03, 2019 7:16 am
by Terry Bohlsen
A further spectrum. Quite a change in 2 days.
Terry
v3890sgr_composite.png

Re: Eruption of recurrent nova V3890 Sgr

PostPosted: Wed Sep 04, 2019 3:25 pm
by Joan Guarro Flo
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.

Re: Eruption of recurrent nova V3890 Sgr

PostPosted: Wed Sep 04, 2019 4:30 pm
by Joan Guarro Flo
Hi,

And.

JG.

Re: Eruption of recurrent nova V3890 Sgr

PostPosted: Thu Sep 05, 2019 5:16 am
by Francois Teyssier
Congratulations, Joan!

An update of the evolution with low res spectra

V3890Sgr.png
V3890Sgr.png (89.15 KiB) Viewed 3298 times


He III 4686 and the blend NIII/CIII are now obvious. The radiation is strengthening as the remaining envelop is receding

Re: Eruption of recurrent nova V3890 Sgr

PostPosted: Sat Sep 07, 2019 1:57 pm
by umberto sollecchia
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 3239 times


Comparison
v3890sgr_20190906_785_ Comparazione -Umberto Sollecchia.png
v3890sgr_20190906_785_ Comparazione -Umberto Sollecchia.png (43.58 KiB) Viewed 3238 times

Re: Eruption of recurrent nova V3890 Sgr

PostPosted: Sat Sep 07, 2019 4:38 pm
by Francois Teyssier
A list of high ionization lines which could be observed in the next few days

list.PNG
list.PNG (5.27 KiB) Viewed 3225 times


François

Re: Eruption of recurrent nova V3890 Sgr

PostPosted: Tue Sep 10, 2019 4:36 pm
by Francois Teyssier
The evolution of the nova
LISA Spectra (Pavel & Woody)

V3890Sgr.png
V3890Sgr.png (111.37 KiB) Viewed 3159 times




François

Re: Eruption of recurrent nova V3890 Sgr

PostPosted: Wed Sep 11, 2019 8:53 am
by umberto sollecchia
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 3130 times


v3890sgr_20190910_775 - Comparison - U. Sollecchia.png
v3890sgr_20190910_775 - Comparison - U. Sollecchia.png (32.02 KiB) Viewed 3130 times

Re: Eruption of recurrent nova V3890 Sgr

PostPosted: Sat Sep 14, 2019 5:00 am
by Francois Teyssier
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

Re: Eruption of recurrent nova V3890 Sgr

PostPosted: Sat Sep 14, 2019 8:18 am
by Francois Teyssier
An update of the monitoring
LISA spectra obtained by Woody and Pavol
V3890Sgr.png
V3890Sgr.png (132.84 KiB) Viewed 3014 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