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Re: Dramatic change of H alpha profile
Posted: Wed Jun 24, 2015 11:11 pm
by Olivier GARDE
And to try to better see the oscilations of the blue part of H alpha emission line.
Re: Dramatic change of H alpha profile
Posted: Fri Jun 26, 2015 12:40 pm
by Jacques Montier
Hello all,
CH Cyg spectrum of the last night 2015/06/26
- 20150626_chcyg.png (48.94 KiB) Viewed 15434 times
Animation of 15 profiles of 180s each.
- 20150626_chcyg_animation.gif (364.51 KiB) Viewed 15410 times
The small Halpha line oscillation seems to go on.
Regards,
Re: Dramatic change of H alpha profile
Posted: Sat Jun 27, 2015 8:43 pm
by Peter Somogyi
Next evening (5 minute exposures, 25cm Newt, LHires/2400/15um, R~20K-18K, break between .897 and 911):
- _chcyg_20150626_873_940.gif (396.88 KiB) Viewed 15385 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.
Re: Dramatic change of H alpha profile
Posted: Sun Jun 28, 2015 1:03 pm
by Jacques Montier
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 (46.04 KiB) Viewed 15368 times
Here is the animation with 20x180s spectra.
- 20150627_chcyg_animation.gif (470.26 KiB) Viewed 15368 times
The profile looks quiet.
Cheers,
Re: Dramatic change of H alpha profile
Posted: Mon Jun 29, 2015 8:31 pm
by Peter Somogyi
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 (351.24 KiB) Viewed 15321 times
Taken through randomly going over clouds (= variable SNR), finally had to give up.
Peter
Re: Dramatic change of H alpha profile
Posted: Tue Jun 30, 2015 9:01 am
by Jacques Montier
Hi all,
CH Cyg spectrum of the last night on 2015/06/29
- 20150629_chcyg.png (44.26 KiB) Viewed 15292 times
Animation with 24x180s spectra
- 20150629_chcyg_animation.gif (532.03 KiB) Viewed 15292 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,
Re: Dramatic change of H alpha profile
Posted: Tue Jun 30, 2015 10:18 am
by Francois Teyssier
c'est impressionnant, Jacques
Le continuum est remarquablement stable.
Bonne continuation
François
Re: Dramatic change of H alpha profile
Posted: Tue Jun 30, 2015 3:48 pm
by Jacques Montier
Oui et c'est d'autant plus impressionnant de suivre l'évolution du profil en temps réel pendant les acquisitions.
- ecran_controle.jpg (40.26 KiB) Viewed 15250 times
À bientôt
Amitiés,
Re: Dramatic change of H alpha profile
Posted: Tue Jun 30, 2015 10:01 pm
by Olivier GARDE
Another animation of CH Cyg : time serie of 64 exposures of 180s each (3H)
For Halpha
For H Beta (see the small emission line near 4888 Â)
Re: Dramatic change of H alpha profile
Posted: Sun Jul 05, 2015 9:14 pm
by Peter Somogyi
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 (1.98 MiB) Viewed 15154 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