Skip to main content

TCP J18292290-1430460: likely nova (10.3 mag) in Scutum

11 posts / 0 new
Last post
SPK
SPK's picture
TCP J18292290-1430460: likely nova (10.3 mag) in Scutum

TCP J18292290-1430460 (N:)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=621695

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-J18292290-1430460_0630.jpg

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/followups/J18292290-1430460.html

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

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

Clear skies,
Patrick

Olivier GARDE
echelle spectrum of TCP J18292290-1430460

I'm now on this target since the beginning of the night with an echelle spectrograph (eShel from Shelyak Instrument R=11000) and a RC400 Astrosib (16 inchs telescope) and ATIK 460ex CCD.

The first raw spectrum show a large P Cyg profil on H alpha and others lines

Process of the final spectrum is in progress...

FMT
FMT's picture
Thank you for the alert,

Thank you for the alert, Patrick

First spectrum obtained by Umberto Sollecchia in ARAS database

http://www.astrosurf.com/aras/Aras_DataBase/Novae/2018_NovaSct2018.htm

Clearly a nova near maximum luminosity

François Teyssier

 

Olivier GARDE
eShel Spectrum of the nova

And quicky process, the graph of H Alpha velocity

And Sodium lines
 

I try to do more exposure to improve the SNR, (flux is very weak with an eShel)

SPK
SPK's picture
The Astronomer's Telegram (ATel) #11802

Olivier Garde's and Umberto Sollecchia's results written up here:
"First spectroscopic observations of TCP J18292290-1430460 (Nova Sct 2018): an optically thick classical nova"
http://www.astronomerstelegram.org/?read=11802

Deconinck Michel
Deconinck Michel's picture
Thank you for the alert

Thank you for the alert Patrick!

I did a visual estimation July 1st @ 1:40 UTC : +10.8 using my Mewlon 250CRS. No color detected because of the close Moon light.

Michel

SPK
SPK's picture
Re: Thank you for the alert

My pleasure, François and Michel.

Christian Hennes
Christian Hennes's picture
Light Curve of TCP J18292290-1430460

Here is a light curve done last night over 3:15 hours. This is a relative measurement. Olivier Garde advised me to seek for other light curves. So, I am posting just in case it may be interesting for anyone here.

File upload: 
Deconinck Michel
Deconinck Michel's picture
My last visual estimation :

My last visual estimation : July 2nd @ 2:17 UTC : +11.2

Michel

pablotwa
pablotwa's picture
Time series uploaded to AAVSO , getting brighter

I took a series of observations June 30th local, July 1rst UT, uploaded to AAVSO , it's getting brighter..

weo
weo's picture
AAVSO Alert Notice 638 on N Sct 2018

AAVSO Alert Notice 638 announces and reports on Nova Sct 2018 = TCP J18292290-1430460. Please see notice for details and observing instructions.

Many thanks, and Good observing,

Elizabeth O. Waagen, AAVSO HQ

 

Log in to post comments
AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484