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 Peter Somogyi » Tue Jul 07, 2015 7:36 am

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 2937 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
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Re: Dramatic change of H alpha profile

Postby Francois Teyssier » Wed Jul 15, 2015 10:09 pm

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 2894 times
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Re: Dramatic change of H alpha profile

Postby Jacques Montier » Thu Jul 16, 2015 9:49 am

Hi all,

François, we have been recording the same target that night ;)

20150715_chcyg.png
20150715_chcyg.png (49.05 KiB) Viewed 2882 times


Cheers,
--
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 Jul 18, 2015 3:49 pm

Last night's session beginning and end:
_chcyg_20150717_18.png
_chcyg_20150717_18.png (21.05 KiB) Viewed 2853 times


Both end have multiple exposures, but it was not changing enough to compile meaningful animation, and taken other targets in between.

Cheers,
Peter
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Re: Dramatic change of H alpha profile

Postby Benjamin Mauclaire » Wed Jul 22, 2015 7:38 pm

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 2823 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
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Re: Dramatic change of H alpha profile

Postby Miguel Rodriguez » Sat Jul 25, 2015 11:47 am

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 2799 times
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Re: Dramatic change of H alpha profile

Postby Olivier Thizy » Tue Jul 28, 2015 11:55 am

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 2769 times



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

Postby Olivier Thizy » Tue Jul 28, 2015 1:49 pm

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 2759 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/InformationLetter/InformationLetter.html

Specially this newsletter: http://www.astrosurf.com/aras/novae/InformationLetter/ARAS_EruptiveStars_2015-04.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/
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Re: Dramatic change of H alpha profile

Postby Olivier GARDE » Tue Jul 28, 2015 1:52 pm

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
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Re: Dramatic change of H alpha profile

Postby Benjamin Mauclaire » Tue Jul 28, 2015 2:03 pm

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 2755 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
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