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Re: Dramatic change of H alpha profile
Posted: 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
Posted: 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
Posted: 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 (83.42 KiB) Viewed 20401 times
Cordialement,
Olivier Thizy
http://observatoire-belle-etoile.blogspot.fr/
Re: Dramatic change of H alpha profile
Posted: Fri Jul 31, 2015 5:22 pm
by Francois Teyssier
AAVSO Light Curve
General trend : decreasing since the beginning of June
- CHCyg.png (10.59 KiB) Viewed 20381 times
Results from 29th and 30th of july :
- _chcyg_20150729_865_full_HaHbHg.png (14.7 KiB) Viewed 20381 times
- _chcyg_20150730_873_full_HaHbHg.png (15.64 KiB) Viewed 20381 times
About lines formation :
- CH Cyg : Introduction to CH Cyg campaign by Dr A. Skopal :
http://www.astrosurf.com/aras/novae/Inf ... 015-01.pdf
- Symbiotics : Several texts from Dr S. Shore :
http://www.astrosurf.com/aras/novae/Inf ... 3-2014.pdf
François Teyssier
Re: Dramatic change of H alpha profile
Posted: Sat Aug 01, 2015 10:35 am
by Miguel Rodriguez
Spectrum from two hours observation.
Re: Dramatic change of H alpha profile
Posted: 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 (599.96 KiB) Viewed 20328 times
Cordialement,
Olivier Thizy
http://observatoire-belle-etoile.blogspot.fr/
Re: Dramatic change of H alpha profile
Posted: 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
- CH Cyg - 02/08/2015 - Associazione Astrofili Fiorentini
- CHCyg_anim.gif (74.22 KiB) Viewed 20312 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
Posted: 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 (17.35 KiB) Viewed 20304 times
François
Re: Dramatic change of H alpha profile
Posted: 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
Re: Dramatic change of H alpha profile
Posted: 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 (371.44 KiB) Viewed 20251 times
- CH_Cygni_20150807_anim.gif (375.43 KiB) Viewed 20251 times
Equipment: C11 + eShel
Cordialement,
Olivier Thizy
http://observatoire-belle-etoile.blogspot.fr/