Page 1 of 1
V694 Mon = MWC 560
Posted: Sun Jan 25, 2015 8:11 am
by Francois Teyssier
Spectrum obtained this night
- _v694mon_20150124_847_fteyssier.png (25.73 KiB) Viewed 8765 times
Change in the absorptions since the last spectra obtained by Peter in december
Type A nr according to Iijima's classification (see :
http://www.astronomie-amateur.fr/feuill ... 94Mon.html)
The velocity of the jet is about 2500 km/s
François
Re: V694 Mon = MWC 560
Posted: Mon Feb 09, 2015 4:47 pm
by Joan Guarro Flo
The V694 Mon, yesterday night.
J.Guarro.
Re: V694 Mon = MWC 560
Posted: Tue Feb 10, 2015 5:07 pm
by Christian Buil
Observation of V694 Mon the 9.8 Feb. with a C11 and a Lhires III (1800 lines/mm grating for a R = 8800 resolution power). 35 microns slit wide :
The Lhires III is updated with the new kit.
Christian
PS : François, je t'envoi les données.
Il y a des raies très fines (origine ?).
Re: V694 Mon = MWC 560
Posted: Tue Feb 10, 2015 7:02 pm
by David Boyd
Three flux calibrated spectra of V694 Mon on 5, 8 and 9 August.
Photometric magnitudes and colours as follows:
5 Aug V=10.43 (V-Ic)=1.86
8 Aug V=10.21 (V-Ic)=1.73
9 Aug V=10.09 (V-Ic)=1.67
- _v694mon_20150205_911_D.Boyd_flux_2.png (54.07 KiB) Viewed 8665 times
- _v694mon_20150208_880_D.Boyd_flux_2.png (54.86 KiB) Viewed 8665 times
- _v694mon_20150209_871_D.Boyd_flux_2.png (61.72 KiB) Viewed 8665 times
Hα, Hβ and Hγ line fluxes have increased
- H line flux.png (11.25 KiB) Viewed 8665 times
David
Re: V694 Mon = MWC 560
Posted: Tue Feb 10, 2015 7:26 pm
by Francois Teyssier
Christian : excellent at that resolution, we have the profile - will be interesting to compare with low res spectra the maximum velocity of the absorption.
The narrow lines are supposed to be formed in the accretion disk. These are essentially Fe lines.
David : nice series, we'll have to measure the velocities
François
Re: V694 Mon = MWC 560
Posted: Tue Feb 10, 2015 8:19 pm
by David Boyd
While recording the spectrum on 9 August I was also measuring the variation in V and Ic magnitudes. The V magnitude is shown below
- V694 Mon light curve 9 Aug 2015.png (11.31 KiB) Viewed 8654 times
I compared the two 5 minute spectral exposures taken at 20150209.923 (JD 2457063.423) when the mean V mag was 10.14 and at 20150209.930 (JD 2457063.430) when the V mag had risen to 10.00. During the 10 minutes between these exposures the change in the spectrum is shown below
- _v694mon_20150209_D.Boyd_flux_change.png (46.77 KiB) Viewed 8654 times
At the Hα emission line, the flux increased by 3.4%
- H-alpha line at V=10.0 and V=10.14.png (6.53 KiB) Viewed 8654 times
David
Re: V694 Mon = MWC 560
Posted: Sat Feb 21, 2015 12:24 pm
by Joan Guarro Flo
To all:
Comparison of two nights of V694 Mon.
J.Guarro.
Re: V694 Mon = MWC 560
Posted: Tue Feb 24, 2015 12:18 am
by Christian Buil
Hi,
A spectrum taken with C11 and Lhires 600 l/mm - 35 microns slit (and Atik460EX) . It is a composition of 4 individual spectra (one for the blue region, one for the green, one for the red and one for near-infrared) - Thanks to Lhires kit upgrade, these observation mode is only possible because availably of many Ne/Ar/He lines.
Same date as Joan latest spectrum:
Christian
Re: V694 Mon = MWC 560
Posted: Mon Mar 02, 2015 2:12 am
by Tim Lester
Finally after nearly two months of nights that were just too cold for me to operate we had a warm night. It only reached -17C!
After Christians's last result I decided to see what I could do with my 1800lpm grating ( R = 8900) on V694 Mon.
I am very pleased as I had not thought I could reach such faint objects at this resolution with reasonable signal to noise.
- _v694mon_20150301_073_tlester_crop.png (10.56 KiB) Viewed 8446 times
Tim
Re: V694 Mon = MWC 560
Posted: Mon Mar 30, 2015 10:19 pm
by Peter Somogyi
Did a weekend catch (250/1000N, APM barlow, LHires 600/mm, 23um slit):
Old was 5 x 1200 sec, new is only 3 x 1200 sec.
Peter