v694 Mon

[Jacques Montier]

Hello all,

The spectrum of the last night.

V694mon_profile.png (50.32 KiB) Viewed 8371 times

Cheers,

[Francois Teyssier]

Finally, a clear night

V694Mon_16-02-2016.PNG (37.36 KiB) Viewed 8346 times

Ha = red
Hb = green
[OI] 6300 = blue

V max ~ 2700 km/s




Number lines of metals

v694mon_full.PNG (19.75 KiB) Viewed 8346 times

François

[Paolo Berardi]

Hi François, the H-alpha absorption shape now seems more "rounded" and red side of H-beta one has not continued to rise. From AAVSO observations I saw that the brightness in V band is decreased (until about mag 9.6).

The spectrum with eShel is great!

I had several nights with rain and clouds...

Paolo

[Tim Lester]

Here is my result for 2016/02/19. 6000 to 7100 ang, R = 9000. (Ambient temp. -19C!)

I used the Cflib spectra for the star HD59984 to calibrate response. It is a mag. 5.9 F5V star that is 2 degrees away from V694 Mon.
The average altitudes differed by less than 1 deg during acquisition.

Tim

[Robin Leadbeater]

A bit off topic but has anyone checked how well the Indo-US CfLIB spectra work as reference stars ? Although the spectral features are taken from actual spectra of the specific star, the continuum is taken from Pickles spectra of the same spectral type so they would potentially have the same problems. (eg metallicity and IS reddening effects etc)
https://www.noao.edu/cflib/Valdes.ps
page 10

Cheers
Robin

[Francois Teyssier]

Nice Tim !
The star looks quiet in term of velocity of the jet despite the visual outburst.
So let's go on.

Here's an identification of the metal lines for 4500-4600 range.
Fe I, Fe II, Ti II, Cr II, Ba II
All are narrow, about 30 km/s
Emitted by the disk according to the models, while the absorptions are formed in the jet

V694Mon_Lines_4500.PNG (36.31 KiB) Viewed 8265 times

François

[Paolo Berardi]

Robin, thank you for pointing that out. I didn't know the observed continuum was fitted to the Pickles ones. Anyway I was thinking to use the Cflib profile like a Pickles for a reference star not far from V694 Mon (HD 49147) - for which there is not a calibrated profile (I suppose). According to François spreadsheet data, its E(B-V) value is zero but I don't know about metallicity, might be deducted from Cflib profile lines if there is an impact on continuum?

I hope Elodie library is the source suitable for calibrating our mid/hi-res spectra (I read your new topic) but I saw a large deviation of continuum slope respect to Calspec/Pickles on Vega spectrum (see here).

Yesterday I observed again V694 Mon by finding (looking at 2d spectrum) what François says about a not high velocity of jet (H-beta seems stable and Fe II absorption components have decreased the blue-shift). As soon as it is ready, I show the H-beta region profile.

Paolo

[Robin Leadbeater]

Hello Paolo,

I hope Elodie library is the source suitable for calibrating our mid/hi-res spectra (I read your new topic) but I saw a large deviation of continuum slope respect to Calspec/Pickles on Vega spectrum (see here).

The ELODIE 3.1 library looks promising. The Vega spectrum in the library confirms the problem seen with the ELODIE Vega spectrum in ISIS and agrees well with Calspec
http://www.spectro-aras.com/forum/viewt ... 1369#p6205

Cheers
Robin

[Paolo Berardi]

My last observation for 20 feb:



Radial velocity:



Paolo

PS: Robin, I answered in the Elodie library topic

[umberto sollecchia]

Salut, Voici un nouveau profil d'observation 20.02.2016.

Profilov694mon.jpg (25.15 KiB) Viewed 8194 times

Umberto