TCP J18292290-1430460, mag 10 in Sct

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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Tim Lester » Mon Jul 09, 2018 6:45 pm

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


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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Francois Teyssier » Mon Jul 09, 2018 7:29 pm

Excellent, Tim
Thank you for sharing your point of view about ASI1600mm
Did you bin 2,
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Tim Lester » Tue Jul 10, 2018 2:11 am

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.

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Re: TCP J18292290-1430460, mag 10 in Sct

Postby David Boyd » Wed Jul 11, 2018 8:59 pm

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
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby umberto sollecchia » Thu Jul 12, 2018 12:54 pm

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 172 times
Last edited by umberto sollecchia on Thu Jul 12, 2018 2:21 pm, edited 1 time in total.
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Paolo Berardi » Thu Jul 12, 2018 2:05 pm

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

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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Christian Buil » Fri Jul 13, 2018 3:47 pm

Nova Sct 2018 during the spectro OHP workshop (Observatoire de Haute-Provence):

Image


Image

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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Paolo Berardi » Sat Jul 14, 2018 9:45 am

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

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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Olivier GARDE » Thu Jul 19, 2018 8:40 am

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
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 Cazzato » Thu Jul 19, 2018 12:12 pm

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
Attachments
novasct2018 comparison.jpg
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