Dramatic change of H alpha profile

Campaign on the request of Dr Ausgustin Skopal
H alpha line at R > 10,000
and low res spectra

Re: Dramatic change of H alpha profile

Postby Olivier GARDE » Wed Jun 24, 2015 11:11 pm

And to try to better see the oscilations of the blue part of H alpha emission line.

Image
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
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Re: Dramatic change of H alpha profile

Postby Jacques Montier » Fri Jun 26, 2015 12:40 pm

Hello all,

CH Cyg spectrum of the last night 2015/06/26

20150626_chcyg.png
20150626_chcyg.png (48.94 KiB) Viewed 3621 times


Animation of 15 profiles of 180s each.

20150626_chcyg_animation.gif
20150626_chcyg_animation.gif (364.51 KiB) Viewed 3597 times


The small Halpha line oscillation seems to go on.


Regards,
--
Jacques Montier
Societe d'Astronomie de Rennes
IAU code J23
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Re: Dramatic change of H alpha profile

Postby Peter Somogyi » Sat Jun 27, 2015 8:43 pm

Next evening (5 minute exposures, 25cm Newt, LHires/2400/15um, R~20K-18K, break between .897 and 911):
_chcyg_20150626_873_940.gif
_chcyg_20150626_873_940.gif (396.88 KiB) Viewed 3573 times

It was very slowly fading (note the 5:1 peak ratio to continumm already lower than the 8:1 outbreak we saw - but still seem to be double peaked).
After more than 1.5 hour observation switched to another target.
Peter Somogyi
 
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Re: Dramatic change of H alpha profile

Postby Jacques Montier » Sun Jun 28, 2015 1:03 pm

Hi all,

On 2015/06/27, blue wing of Halpha line has decreased a lot.
Peter, you observed the beginning, so we missed the transition...

20150627_chcyg.png
20150627_chcyg.png (46.04 KiB) Viewed 3556 times


Here is the animation with 20x180s spectra.

20150627_chcyg_animation.gif
20150627_chcyg_animation.gif (470.26 KiB) Viewed 3556 times


The profile looks quiet.

Cheers,
--
Jacques Montier
Societe d'Astronomie de Rennes
IAU code J23
Jacques Montier
 
Posts: 242
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Re: Dramatic change of H alpha profile

Postby Peter Somogyi » Mon Jun 29, 2015 8:31 pm

Yesterday it had double peak again (6:1 - 5:1 ratio of Ha/cont., Lhires 2400/mm, 15um slit, R~25K, 13 x 5 min):
_chcyg_20150628_869_918.gif
_chcyg_20150628_869_918.gif (351.24 KiB) Viewed 3509 times


Taken through randomly going over clouds (= variable SNR), finally had to give up.

Peter
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Re: Dramatic change of H alpha profile

Postby Jacques Montier » Tue Jun 30, 2015 9:01 am

Hi all,

CH Cyg spectrum of the last night on 2015/06/29

20150629_chcyg.png
20150629_chcyg.png (44.26 KiB) Viewed 3480 times



Animation with 24x180s spectra

20150629_chcyg_animation.gif
20150629_chcyg_animation.gif (532.03 KiB) Viewed 3480 times


Double peak again with a very impressive blue wing Halpha line.

PS : a strange and slight wavelength shift along the 24x180s spectra ; neon calibration lines moving during monitoring with LhiresIII ?

Cheers,
Last edited by Jacques Montier on Tue Jun 30, 2015 10:20 am, edited 1 time in total.
--
Jacques Montier
Societe d'Astronomie de Rennes
IAU code J23
Jacques Montier
 
Posts: 242
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Re: Dramatic change of H alpha profile

Postby Francois Teyssier » Tue Jun 30, 2015 10:18 am

c'est impressionnant, Jacques
Le continuum est remarquablement stable.
Bonne continuation
François
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Re: Dramatic change of H alpha profile

Postby Jacques Montier » Tue Jun 30, 2015 3:48 pm

Oui et c'est d'autant plus impressionnant de suivre l'évolution du profil en temps réel pendant les acquisitions.

ecran_controle.jpg
ecran_controle.jpg (40.26 KiB) Viewed 3438 times


À bientôt

Amitiés,
--
Jacques Montier
Societe d'Astronomie de Rennes
IAU code J23
Jacques Montier
 
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Re: Dramatic change of H alpha profile

Postby Olivier GARDE » Tue Jun 30, 2015 10:01 pm

Another animation of CH Cyg : time serie of 64 exposures of 180s each (3H)

For Halpha
Image


For H Beta (see the small emission line near 4888 Â)
Image
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Olivier GARDE
 
Posts: 953
Joined: Thu Sep 29, 2011 6:35 am
Location: Rhône Alpes FRANCE

Re: Dramatic change of H alpha profile

Postby Peter Somogyi » Sun Jul 05, 2015 9:14 pm

Yesterday I was experimenting around H-beta with LHires + 600/mm + 15um slit, got around R~3000 in blue (which I'm satisfied because blue is less good at res. - at blue end, I can't even focus properly all the range).

3 minute exposures, with a few cal. pauses:
result_psomogyi_20150704_05_Hb_all.gif
result_psomogyi_20150704_05_Hb_all.gif (1.98 MiB) Viewed 3342 times


Interpolated 3 times a ref.star Iot Cyg.
Took a bit few Ne/Ar manually (hopefully automated today...) but in return, exposures quite continuous with 3 bigger breaks.
Processed by ISIS, other than ref. star interpolation have not touched the continuum.

Note: this is also my lesson to get more precise calibration, after returning to lower it's more obvious...

- Peter
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