Bright Nova (mag 7) in southern hemisphere

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Bright Nova (mag 7) in southern hemisphere

Postby Francois Teyssier » Sun Jan 14, 2018 5:54 pm

From VSNET alert list:

PNV J11261220-6531086 (N)

RA 11h26m15.30s, DEC -65°31'26.3" (J2000.0; Daniel Bamberger)
2018 Jan. 14.4861 UT, V= 7.0 mag
Discoverer: Rob Kaufman, Bright, Victoria, Australia

Follow-up reports:
http://www.cbat.eps.harvard.edu/unconf/followups/J11261220-6531086.html
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Re: Bright Nova (mag 7) in southern hemisphere

Postby Paolo Berardi » Wed Jan 17, 2018 12:43 am

Discovered and confirmed as a classical nova (with an SA100 grating) by an amateur astronomer, fantastic! :o

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Re: Bright Nova (mag 7) in southern hemisphere

Postby Francois Teyssier » Wed Jan 17, 2018 9:58 am

Terry Bohlsen has got a nice spectrum of H alpha line
with mean velocities of the two absorptions = -700 and -1500 km/s. Max velocity ~ 2000 km/s

asdb_novamus2018_20180116_475.png
asdb_novamus2018_20180116_475.png (16.37 KiB) Viewed 1216 times


ARAS Eruptive stars database : http://www.astrosurf.com/aras/Aras_DataBase/Novae/2018_NovaMus2018.htm
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Re: Bright Nova (mag 7) in southern hemisphere

Postby Francois Teyssier » Wed Jan 17, 2018 12:01 pm

And the ATel:
http://www.astronomerstelegram.org/?read=11183


ATEL #11183 ATEL #11183

Title: High resolution optical spectroscopy of nova Mus 2018 = PNV
J11261220-6531086
Author: Terry C. Bohlsen (ARAS group, Mirranook Armidale,
Queries: shore@df.unipi.it
Posted: 17 Jan 2018; 11:52 UT
Subjects:Optical, Nova

Nova Muscae 2018 (PNV J11261220-6531086), discovered o 2018 Jan. 14.5
(V=7.0) was observed spectroscopically on 2018 Jan. 16.46 (MJD 58134.982),
with a LHIRES spectrograph mounted on a C11 reflector (35micron slit, 2400
lines/mm, R > 11000) with a total exposure time of 1200 sec in the interval
6520-6690A. At the time, the AAVSO reported V ~ 7. The spectrum at Halpha
shows a broad, optically thick emission profile with absorption components
at -1540 and -650 km/s (the higher velocity is the broader component).
Some residual emission is also visible beyond -1700 km/s. The redward
emission wing extends to at least +2500 km/s, S/N is about 100 in the continuum,
the emission being redward extended (skewed) and with peak intensity of
about 10 (emission EW ~ 360 A). The He I 6678A line is not detected. The
line profile and velocities are typical of the post-maximum stage of expansion,
its brightness suggests this classical nova may also be detected at high
energy, especially with Fermi. The nova is clearly still in its declining
optically thick stage, the low resolution spectrum from Jan. 14 reported
by Kaufman (AAVSO Alert 609) shows Balmer emission lines of comparable
with to that described here. Further observations are encouraged.

[url]ARAS Nova Database: http://www.astrosurf.com/aras/Aras_DataBase/Novae.htm[/url]

Congratulations, Terry!

François
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Re: Bright Nova (mag 7) in southern hemisphere

Postby Ken Harrison » Wed Jan 17, 2018 11:47 pm

Managed to get an Ha spectrum of Nova Musca 2018 last night.
Similar to Terry's result.
NovaMusca170118.png
NovaMusca170118.png (28.43 KiB) Viewed 1177 times
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before....
"Imaging Sunlight - Using a digital Spectroheliograph" - Springer
http://www.astronomicalspectroscopy.com
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Re: Bright Nova (mag 7) in southern hemisphere

Postby etienne bertrand » Thu Jan 18, 2018 9:12 am

Congratulations.
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Re: Bright Nova (mag 7) in southern hemisphere

Postby Ken Harrison » Thu Jan 18, 2018 3:27 pm

Thanks.
No spectra tonight, the ambient temperature is still around 30 deg......
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before....
"Imaging Sunlight - Using a digital Spectroheliograph" - Springer
http://www.astronomicalspectroscopy.com
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