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Re: Dramatic change of H alpha profile
Posted: Sun Aug 16, 2015 9:35 am
by Olivier GARDE
A time serie graph of CH Cyg during 3H30
Re: Dramatic change of H alpha profile
Posted: Sat Aug 22, 2015 12:34 pm
by Jacques Montier
Hi all,
10x180s exposures of CH Cyg on 2015/08/22.
CH Cyg Halpha profile is quite stable.
- @anim_chcyg.gif (48.33 KiB) Viewed 19874 times
Best regards,
Re: Dramatic change of H alpha profile
Posted: Wed Aug 26, 2015 10:34 am
by Olivier GARDE
Another time series taken last night during 6 hours.
Some smalls variations in the blue and red part of H Alpha
Re: Dramatic change of H alpha profile
Posted: Sun Aug 30, 2015 9:56 am
by Peter Somogyi
It might be very thin veils (though SNR was exceptionally good this time), but I'm not aware of any H2O line at the right peak gash (LHires 2400/23um slit) that seems to be a new feature comparing to my past observations:
- @chcyg20150830_goodflat.gif (132.52 KiB) Viewed 19805 times
The left peak returned to equal when star reached a tree, obstructing further observation.
EDIT: accidentally used a raw flat instead of reduced one, uploaded a corrected animation (no real change, my statements valid).
Re: Dramatic change of H alpha profile
Posted: Wed Sep 02, 2015 2:41 pm
by Jacques Montier
Hi all,
CH Cyg of the last night 2015/09/01
- 20150901-chcyg.png (48.47 KiB) Viewed 19783 times
Time series of 18 x 180s
- 20150901-chcyg.gif (459.1 KiB) Viewed 19783 times
Regards,
Re: Dramatic change of H alpha profile
Posted: Mon Sep 07, 2015 10:30 pm
by Olivier GARDE
Re: Dramatic change of H alpha profile
Posted: Mon Sep 21, 2015 7:39 pm
by Peter Somogyi
CH Cyg was not at rest yesterday (2015.09.20, 31 x 5 min):
- CHCyg_20150920_21.gif (253.66 KiB) Viewed 19716 times
I had to discard the 24. exposure due to cosmic ray has hit directly the H-alpha region, that has been interpolated by (23+25)/2 here.
Sky was poor at this time, so as the SNR.
2D (33% shrink by X, 300% enlarged by Y):
- CHCyg_20150920_2d.png (165.57 KiB) Viewed 19716 times
2D by column median removed:
- CHCyg_20150920_2d_colmed.png (165.57 KiB) Viewed 19716 times
Interesting to see the faint afterglow continued on the other(R) side.
Cheers,
Peter
Re: Dramatic change of H alpha profile
Posted: Sun Nov 01, 2015 10:21 pm
by Olivier GARDE
Another time serie of CH Cyg taken last night during 2H30
Re: Dramatic change of H alpha profile
Posted: Tue May 17, 2016 4:52 pm
by Olivier GARDE
Time serie spectrum of CH Cyg during 3H45' with eshel spectrograph R=110000
The full spectrum
Time serie spectrum on order 34 (H Alpha)
And an animation of HeI 5876 Å line
Is the small "pick" evolution inside HeI line are real or not ?
Re: Dramatic change of H alpha profile
Posted: Fri May 20, 2016 1:14 pm
by etienne bertrand
Bravo pour cet excellent travail
