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Re: TCP J18292290-1430460, mag 10 in Sct

Posted: Mon Jul 09, 2018 6:45 pm
by Tim Lester
Here is my echelle result for July 9th.
I have replaced my QSI583 imager with an ASI1600mm pro. I am getting much better S/N, particularly at the blue end. Very pleased. :D
novasct2018_20180709_113_tlester.png
Tim

Re: TCP J18292290-1430460, mag 10 in Sct

Posted: Mon Jul 09, 2018 7:29 pm
by Francois Teyssier
Excellent, Tim
Thank you for sharing your point of view about ASI1600mm
Did you bin 2,
François

Re: TCP J18292290-1430460, mag 10 in Sct

Posted: Tue Jul 10, 2018 2:11 am
by Tim Lester
To answer your question Francois I actually binned 3x3 (after calibrating and combining the images un-binned).
This gives a sampling factor of only 2.1 which is not really enough. Also I had to leave optimum binning turned off in ISIS.

Here is the same data processed with 2x2 binnnig and with optimum binning turned on. Sampling is 3.2.
novasct2018_20180709_113_tlester.png
And here is a detailed comparison.
novasct2018_20180709_113_binning.png
I'm not sure if the gain in S/N for 3x3 binning is justified for very faint objects due to the marginal sampling.

Tim

Re: TCP J18292290-1430460, mag 10 in Sct

Posted: Wed Jul 11, 2018 8:59 pm
by David Boyd
Change in the spectrum of the nova between 3rd and 10th July. V mag has dropped from 10.76 to 11.62 and the (B-V) colour changed from 1.22 to 1.08.
Flux in the H-alpha emission line has increased by almost 30%.
David
novasct2018_20180703+20180710_D.Boyd.png

Re: TCP J18292290-1430460, mag 10 in Sct

Posted: Thu Jul 12, 2018 12:54 pm
by umberto sollecchia
Bonjour à tous, placé le profil de la nova observé le 11-07-2018 calibré en flux absolu avec la photométrie contemporaine de Paolo Berardi.
Umberto
novasct_20180711_842_Umberto Sollecchia.png
novasct_20180711_842_Umberto Sollecchia.png (15.51 KiB) Viewed 15191 times

Re: TCP J18292290-1430460, mag 10 in Sct

Posted: Thu Jul 12, 2018 2:05 pm
by Paolo Berardi
Hi all, a new observation for 11 July. The profile is flux calibrated using a contemporary V photometry and low-res spectroscopy (by Umberto).

Image

Heliocentric radial velocity plot (telluric removed):

Image

The mean magnitude during the integration was V 11.30 with an upward brightness trend. The light curve:

Image

Paolo

Re: TCP J18292290-1430460, mag 10 in Sct

Posted: Fri Jul 13, 2018 3:47 pm
by Christian Buil
Nova Sct 2018 during the spectro OHP workshop (Observatoire de Haute-Provence):

Image


Image

Christian

Re: TCP J18292290-1430460, mag 10 in Sct

Posted: Sat Jul 14, 2018 9:45 am
by Paolo Berardi
Enjoy the workshop, gretings to all of you! :D

Yesterday observation (13.833 July) with C9.25 and Lhires III 1200.

Image

Radial velocity plot:

Image

Paolo

Re: TCP J18292290-1430460, mag 10 in Sct

Posted: Thu Jul 19, 2018 8:40 am
by Olivier GARDE
Two last Atel on this nova :

http://www.astronomerstelegram.org/?read=11826
http://www.astronomerstelegram.org/?read=11859

During OHP spectro party Stephane Charbonnel took 2 eShel spectra with a 300mm newton telescope, a challenge according the last magnitude of this nova.
Spectra visible in ARAS database :
http://www.astrosurf.com/aras/Aras_Data ... ct2018.htm

Re: TCP J18292290-1430460, mag 10 in Sct

Posted: Thu Jul 19, 2018 12:12 pm
by Paolo Cazzato
Hallo everybody,
here my last spectra compared with the 4th July consistent with those reported at low resolution.
Since we use a Newton telescope togheter with an Alpy setup, i am strong interest to know more information about calibration spectra and problems about the weight of the cameras and the spectroscope on the newton focuser. I Read Stephane Charbonnel used a newton; does someone tell me more?

Clear nights
Regards