TCP J18292290-1430460 = Nova Sct 2018

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TCP J18292290-1430460 = Nova Sct 2018

Postby Paolo Berardi » Sat Jun 30, 2018 10:57 am

Hi all, from CBAT "Transient Object Followup Reports":

http://www.cbat.eps.harvard.edu/unconf/ ... 30460.html

No confirmation so far. A possible nova?

Coord 2000 (high reddening there...):
AR 18 29 22.90
DEC -14 30 46.0

Paolo
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Olivier GARDE » Sat Jun 30, 2018 11:49 am

Hi Paolo,

Thanks for this information, I will try this night with my eShel.....
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Paolo Berardi » Sat Jun 30, 2018 12:53 pm

Hi Olivier, according to P. Schmeer follow-up, it could be a variable star that exhibited in the past some brightenings but not so strong like the present (see the ASAS-SN Sky Patrol light curve). Anyway urgent spectroscopy is required.

Paolo
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Francois Teyssier » Sat Jun 30, 2018 5:39 pm

Thank you Paolo
Spectra welcome for the database and perhaps an ATel for identification
François




Text written by Patrick on AAVSO Forum

TCP J18292290-1430460 (N:)
https://www.aavso.org/vsx/index.php?vie ... oid=621695 [1]

Discovery details:
R.A. 18h29m22.90s, Decl. -14°30'46.0" (J2000.0)
2018 June 29.5768 UT, 10.3 mag (unfiltered)
Discoverer: Yukio Sakurai (Mito, Japan)

2018 06 29.577 UT
Discovered by Y. Sakurai, Mito, Japan, on two frames using Nikon D7100
digital camera + 180-mm f/2.8 lens, who writes there is a variable star
TSVSC1-TN-S300112300-126-67-2 at 21s.88 and 51".1. Nothing is visible at this
location on a frame (limit mag.= 12.1) taken on 2018 June 23.632 UT.

2018 06 30.2646 UT
Photometry results were V=10.43 and Ic=9.35 with 0.61-m f/6.5 CDK astrograph
+ FLI PL09000 CCD, iTelescope.NET at Auberry, CA, USA. Position end figures
were 22.93 and 43.9 in R.A.and Dec.
Seiichiro Kiyota (Japan)

2018 06 30.528 UT
Mag. V= 10.57, R= 9.69, I= 8.84, position end figures 22s.96, 44".0 observed
by K. Yoshimoto, Yamaguchi-ken, Japan, using 0.50-m f/6.8 reflector + CCD +
focal reducer, Siding Spring, remotely. An image at
http://orange.zero.jp/k-yoshimoto/TCP-J ... 0_0630.jpg [2]

2018 06 30.5960 UT
Another photometry results were B=12.16, V=10.98, Rc=10.37 and Ic=9.83 with
0.43-m f/6.8 CDK astrograph + FLI PL4710 CCD at iTelescope.NET, SSO, NSW,
Australia, I took low resolution spectra but I can detected no significant
feature (at leat, it is not late type star like Mira variables).
Seichiro Kiyota (Japan)

2018 06 30.67 UT
A progenitor candidate is the Pan-STARRS1 source PSO J182922.940-143044.155
(position end figures 22.935s, 44.19"; i= 20.26 mag). Likely nova eruption
with amplitude of more than 11 magnitudes (V band). --- Patrick Schmeer
(Saarbrücken-Bischmisheim, Germany)

http://www.cbat.eps.harvard.edu/unconf/ ... 30460.html [3]

The likely nova is located 4 arc minutes NE of gamma Scuti.

*** Spectroscopy and multiband photometry are urgently required. ***

Clear skies,
Patrick
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Francois Teyssier » Sat Jun 30, 2018 8:53 pm

Message from Stve Shore
high resolution if possible (and, please, not the usual Halpha only if at all possible) -- it's very important to get the 4800-5300A region and, if possible, the longest wavelengths at around Ca II (infrared triplet around 8600) and O I (the 8446 line). The main thing is to sit on this as long as you can, taking spectra with a cadence of perhaps a day or two, but it will also mean following it for some period if you're all willing.

As proposed by David Boyd, gam Sct looks to be a good reference V mag 4.68, sp type A1 IV/V

Clear sky here. But the target is too low. I've to wait a couple of hours, with CH and Ci Cyg.

François
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Olivier GARDE » Sat Jun 30, 2018 9:13 pm

It's a Nova. On the raw first data, we can see à P Cyg profil on H alpha and others lines, very weak for an eShel Spectrum.

Image

And the field of the auto guiding CCD
Image
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
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Joined: Thu Sep 29, 2011 6:35 am
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Francois Teyssier » Sat Jun 30, 2018 9:42 pm

Excellent

f
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby umberto sollecchia » Sat Jun 30, 2018 10:39 pm

Bonsoir à tous, placé le profil de la nova observé ce soir avec Alpy600. Umberto

tcp-j18292290-1430460_0630_20180630_874_Umberto Sollecchia.png
tcp-j18292290-1430460_0630_20180630_874_Umberto Sollecchia.png (28.21 KiB) Viewed 1121 times
Last edited by umberto sollecchia on Sat Jun 30, 2018 11:16 pm, edited 1 time in total.
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Francois Teyssier » Sat Jun 30, 2018 10:43 pm

Excellent, Umberto
Strong Na I D absorption
Waiting for the spectrum
f
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Paolo Berardi » Sat Jun 30, 2018 11:38 pm

Congratulations Olivier, Umberto!
So we have a classical nova...

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