Page 6 of 8

Re: Dramatic change of H alpha profile

PostPosted: Tue Jul 28, 2015 2:13 pm
by Olivier Thizy
Interesting as we have been observing the same target last night - a good way to compare our results... and lot of work for the ARAS database administrator François Teyssier!... specially as we have time series (and time seems very critical on CH Cygni with changes within minutes!) and for the eShel spectrograph data we have a large spectral domain with multiple orders... not easy to handle. Have a thought for him! ;-)

Looking forward for the OHP spectroscopy workshop where people there will certainly talk about CH Cygni and those changes!...

Cordialement,
Olivier Thizy
http://observatoire-belle-etoile.blogspot.fr/

Re: Dramatic change of H alpha profile

PostPosted: Thu Jul 30, 2015 2:21 pm
by Miguel Rodriguez
Here is my last spectrum from tonight.
Unfortunately I don't have enough time span to monitor profile changes through the night.

Re: Dramatic change of H alpha profile

PostPosted: Fri Jul 31, 2015 1:44 am
by Olivier Thizy
Hello,


a single shot tonight as I didn't want to return the mount and reached the limits. But it shows some changes from your spectrum:

CH Cygni preview.JPG
CH Cygni preview.JPG (83.42 KiB) Viewed 4229 times



Cordialement,
Olivier Thizy
http://observatoire-belle-etoile.blogspot.fr/

Re: Dramatic change of H alpha profile

PostPosted: Fri Jul 31, 2015 5:22 pm
by Francois Teyssier
AAVSO Light Curve

General trend : decreasing since the beginning of June

CHCyg.png
CHCyg.png (10.59 KiB) Viewed 4209 times


Results from 29th and 30th of july :
_chcyg_20150729_865_full_HaHbHg.png
_chcyg_20150729_865_full_HaHbHg.png (14.7 KiB) Viewed 4209 times

_chcyg_20150730_873_full_HaHbHg.png
_chcyg_20150730_873_full_HaHbHg.png (15.64 KiB) Viewed 4209 times


About lines formation :

- CH Cyg : Introduction to CH Cyg campaign by Dr A. Skopal : http://www.astrosurf.com/aras/novae/InformationLetter/ARAS_EruptiveStars_2015-01.pdf
- Symbiotics : Several texts from Dr S. Shore :
http://www.astrosurf.com/aras/novae/InformationLetter/SteveShoreNotes_2013-2014.pdf

François Teyssier

Re: Dramatic change of H alpha profile

PostPosted: Sat Aug 01, 2015 10:35 am
by Miguel Rodriguez
Spectrum from two hours observation.

Re: Dramatic change of H alpha profile

PostPosted: Wed Aug 05, 2015 12:04 am
by Olivier Thizy
Here is an animation (done with SPLAT-VO tool) of CH Cygni Halpha recorded tonight over two hours with C11 + eShel + ST1603:

CHCygni.gif
CHCygni.gif (599.96 KiB) Viewed 4156 times



Cordialement,
Olivier Thizy
http://observatoire-belle-etoile.blogspot.fr/

Re: Dramatic change of H alpha profile

PostPosted: Wed Aug 05, 2015 9:05 pm
by Nico Montigiani
Hi to all.
Here is our animation of CH Cygni H alpha line rocorded at the night of 02 Aug 2015 over 2 hours.
Instumentation: Meade SC 10"f/10 + Lhires III 1200 l/mm + CCD SBIG ST10XME
Time of single exposition: 600 min

CHCyg_anim.gif
CH Cyg - 02/08/2015 - Associazione Astrofili Fiorentini
CHCyg_anim.gif (74.22 KiB) Viewed 4140 times


Clear sky
Nico Montigiani
Massimiliano Mannucci
Lapo Ferrini
Associazione Astrofili Fiorentini A.A.F., Florence, Italy (mpc code 632)

Re: Dramatic change of H alpha profile

PostPosted: Wed Aug 05, 2015 9:44 pm
by Francois Teyssier
Nice Nico ! You can send me the spectra.

CH Cyg to night
Almost constant

chcyg_ha_20150805.png
chcyg_ha_20150805.png (17.35 KiB) Viewed 4132 times


François

Re: Dramatic change of H alpha profile

PostPosted: Thu Aug 06, 2015 7:43 am
by Olivier GARDE
A time serie spectra taken just after Olivier Thizy sequence.
3H30 long : A total of 71 spectra of 180s each with eshal spectrograph.

I have also the same animation for H beta and H gamma

Image

Re: Dramatic change of H alpha profile

PostPosted: Sat Aug 08, 2015 11:50 am
by Olivier Thizy
Here is an animation of the night of august 6th and one from last night (data reduction in ISIS, animation in SpecAudace with 'norma' option):


CH_Cygni_20150806_anim.gif
CH_Cygni_20150806_anim.gif (371.44 KiB) Viewed 4079 times


CH_Cygni_20150807_anim.gif
CH_Cygni_20150807_anim.gif (375.43 KiB) Viewed 4079 times



Equipment: C11 + eShel


Cordialement,
Olivier Thizy
http://observatoire-belle-etoile.blogspot.fr/