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
Peter Somogyi
Posts: 420
Joined: Sun Jul 13, 2014 8:56 am

Re: Dramatic change of H alpha profile

Post by Peter Somogyi »

Before yesterday I did another experiment with the 600/mm by taking automatically Ne/Ar per exposure, finally I just did "Wavelength Registration" so used only the 1st of them - still saw the skew of lines at higher magnification (1-2A) that Wav.Reg. feature removes - but question then which of my per-exposure calibrations was correct.

So here is the basic result (this time 5 min x 29 frames), all processed by ISIS, using only 1st cal.frame:
psomogyi_20150705_5min_n29_wavreg.gif
psomogyi_20150705_5min_n29_wavreg.gif (844.1 KiB) Viewed 12817 times
(LHires 600/mm, 15 um slit, ATIK 414 EXm, R~3000 - 2500 in the end, Helioc. corrected)

At least caught a bigger outflow at H-beta, with tons of other lines varying.
The blue peak of Hb was down comparing to previous day.

Cheers,
Peter
Francois Teyssier
Posts: 1520
Joined: Fri Sep 23, 2011 1:01 pm
Location: Rouen
Contact:

Re: Dramatic change of H alpha profile

Post by Francois Teyssier »

H alpha line tonight
Double pic
Almost stable during the acquisition
_chcyg_20150715_901_full.png
_chcyg_20150715_901_full.png (8.94 KiB) Viewed 12774 times
Jacques Montier
Posts: 242
Joined: Sun May 13, 2012 2:46 pm

Re: Dramatic change of H alpha profile

Post by Jacques Montier »

Hi all,

François, we have been recording the same target that night ;)
20150715_chcyg.png
20150715_chcyg.png (49.05 KiB) Viewed 12762 times
Cheers,
--
Jacques Montier
Societe d'Astronomie de Rennes
IAU code J23
Peter Somogyi
Posts: 420
Joined: Sun Jul 13, 2014 8:56 am

Re: Dramatic change of H alpha profile

Post by Peter Somogyi »

Last night's session beginning and end:
_chcyg_20150717_18.png
_chcyg_20150717_18.png (21.05 KiB) Viewed 12733 times
Both end have multiple exposures, but it was not changing enough to compile meaningful animation, and taken other targets in between.

Cheers,
Peter
Benjamin Mauclaire
Posts: 258
Joined: Thu Sep 29, 2011 10:14 am

Re: Dramatic change of H alpha profile

Post by Benjamin Mauclaire »

Hello,

Here is a 2 hours animation of 10 minutes spectra with Lhires3 2400 g/mm and 12" SCT.
Spectra and animation were done sith Spcaudace:
CH_Cyg_anim.gif
CH_Cyg_anim.gif (145.04 KiB) Viewed 12703 times
We can see V/R inversion of Ha line while at the same time He I 6678 A line is maximum when V(blue) pic of Ha is at maximum.
Is there any interpretation of such phenomenon?

Cheers,

Benji
Spcaudace spectroscopy software: saving you hundred hours of frustration.
Miguel Rodriguez
Posts: 36
Joined: Sat May 31, 2014 4:52 pm
Location: Madrid, Spain

Re: Dramatic change of H alpha profile

Post by Miguel Rodriguez »

Spectrum from last night. Double peak. L-200 spectrograph with 600l/mm grating. R=4351 computed by ISIS.
Attachments
_ch_cyg_zand_type_20150725_140_Miguel_Rodriguez.png
_ch_cyg_zand_type_20150725_140_Miguel_Rodriguez.png
_ch_cyg_zand_type_20150725_140_Miguel_Rodriguez.png (8.31 KiB) Viewed 12679 times
Olivier Thizy
Posts: 370
Joined: Sat Sep 24, 2011 10:52 am
Location: in the french Alps...
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Re: Dramatic change of H alpha profile

Post by Olivier Thizy »

I took three series of spectra on CH Cygni. Need to finetune my setup to reduce the exposure time as lot happens during the 10 mins exposures!

On july 25th, here is animation over almost 3h observation:
CH Cygni 20150725.gif
CH Cygni 20150725.gif (88.28 KiB) Viewed 12649 times

Cordialement,
Olivier Thizy
http://observatoire-belle-etoile.blogspot.fr/
Olivier Thizy
Posts: 370
Joined: Sat Sep 24, 2011 10:52 am
Location: in the french Alps...
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Re: Dramatic change of H alpha profile

Post by Olivier Thizy »

Hello,


Here is a quick comparison between spectrum taken on july 25th and one last night, huge change in two days but actually it changes very quickly sometimes! A star to monitor in high resolution:
_CHCyg__chcyg_20150725-27.png
_CHCyg__chcyg_20150725-27.png (6.32 KiB) Viewed 12639 times

See ARAS march 2015 newsletter for some explanations from Augustin Skopal around this system - still lot to uncover and amateur spectra can help specially if we do a continuous monitoring:
http://www.astrosurf.com/aras/novae/Inf ... etter.html

Specially this newsletter: http://www.astrosurf.com/aras/novae/Inf ... 015-04.pdf


And couple of pictures taken during the last night acquisition:
CH Cyg screen.JPG
Dome20150727T193120.jpg

Cordialement,
Olivier Thizy
http://observatoire-belle-etoile.blogspot.fr/
Olivier GARDE
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Location: Rhône Alpes FRANCE
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Re: Dramatic change of H alpha profile

Post by Olivier GARDE »

Here's a time serie during 4H30 (one exposure each 5 minutes), a compilation of 52 spectra taken with eshel spectrograph (R=11000).
The graph show the variation of the blue part of H alpha line;
Image
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Benjamin Mauclaire
Posts: 258
Joined: Thu Sep 29, 2011 10:14 am

Re: Dramatic change of H alpha profile

Post by Benjamin Mauclaire »

Hello everyone,

During July 27th, I've made a 7 hours run of spectra (10 minutes each). It started at 10h30 pm local time and stoped at 5h30 am local.
CH-Cyg_anim_20150727.gif
CH-Cyg_anim_20150727.gif (504.47 KiB) Viewed 12635 times
This automatic observation was done by running a script under Audela.
It takes calibration lamp spectrum every hour, then finish by parking the telescop, switch off all devices, backup and send the archive to the home computer and close observatory's roof.

This time, CH Cyg's spectrum started with an triple pic on Ha line. Then it disapeared.
We still see that maximum emission for blue Ha line and He 6678 line are synchronized.

Clear sky,

Benji
Spcaudace spectroscopy software: saving you hundred hours of frustration.
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