Dramatic change of H alpha profile

by **Olivier Thizy** » Tue Jul 28, 2015 2:13 pm

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/

by **Miguel Rodriguez** » Thu Jul 30, 2015 2:21 pm

Here is my last spectrum from tonight.
Unfortunately I don't have enough time span to monitor profile changes through the night.

by **Olivier Thizy** » Fri Jul 31, 2015 1:44 am

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 4231 times

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

by **Francois Teyssier** » Fri Jul 31, 2015 5:22 pm

AAVSO Light Curve

General trend : decreasing since the beginning of June

: CHCyg.png (10.59 KiB) Viewed 4211 times

Results from 29th and 30th of july :

: _chcyg_20150729_865_full_HaHbHg.png (14.7 KiB) Viewed 4211 times

: _chcyg_20150730_873_full_HaHbHg.png (15.64 KiB) Viewed 4211 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

by **Miguel Rodriguez** » Sat Aug 01, 2015 10:35 am

Spectrum from two hours observation.

by **Olivier Thizy** » Wed Aug 05, 2015 12:04 am

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 4158 times

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

by **Nico Montigiani** » Wed Aug 05, 2015 9:05 pm

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 4142 times

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

by **Francois Teyssier** » Wed Aug 05, 2015 9:44 pm

Nice Nico ! You can send me the spectra.

CH Cyg to night
Almost constant

: chcyg_ha_20150805.png (17.35 KiB) Viewed 4134 times

François

by **Olivier GARDE** » Thu Aug 06, 2015 7:43 am

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

by **Olivier Thizy** » Sat Aug 08, 2015 11:50 am

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 4081 times

: CH_Cygni_20150807_anim.gif (375.43 KiB) Viewed 4081 times

Equipment: C11 + eShel

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

Dramatic change of H alpha profile

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