Low spectra of CH Cyg and BF Cyg required
-
- Posts: 1521
- Joined: Fri Sep 23, 2011 1:01 pm
- Location: Rouen
- Contact:
Low spectra of CH Cyg and BF Cyg required
In these two stars appears fast and dramatic evolutions of line profiles
See for example
Comment from Augustin Skopal :
I have looked the new spectra of CH Cyg and BF Cyg. Really dramatic
changes in the profiles of Balmer lines on the time-scale of a few days!
Also on BF Cyg
Comment from Augustin Skopal :
As concerns to BF Cyg, I was also surprised with changes in the hydrogen
line profiles. At first look the shift to the red seems as a result
of a wrong calibration of the last spectrum from 12/04/2015, but
comparing the 01/04/2015 spectrum to that from 23/03/2015 suggests
that calibration and/or heliocentric correction is O.K. Just significantly
more absorption on the blue side, and more emission on the red side of
the line appeared.
A. Skopal's request :
However, to interpret such variations will not an easy task. Above all,
we need the continuum profile, which is possible to obtain by modelling
the low-resolution spectra. So, I hope that somebody will obtain also
a low-res spectrum (CH Cyg and BF Cyg).
Waiting for spectra,
François Teyssier
See for example
Comment from Augustin Skopal :
I have looked the new spectra of CH Cyg and BF Cyg. Really dramatic
changes in the profiles of Balmer lines on the time-scale of a few days!
Also on BF Cyg
Comment from Augustin Skopal :
As concerns to BF Cyg, I was also surprised with changes in the hydrogen
line profiles. At first look the shift to the red seems as a result
of a wrong calibration of the last spectrum from 12/04/2015, but
comparing the 01/04/2015 spectrum to that from 23/03/2015 suggests
that calibration and/or heliocentric correction is O.K. Just significantly
more absorption on the blue side, and more emission on the red side of
the line appeared.
A. Skopal's request :
However, to interpret such variations will not an easy task. Above all,
we need the continuum profile, which is possible to obtain by modelling
the low-resolution spectra. So, I hope that somebody will obtain also
a low-res spectrum (CH Cyg and BF Cyg).
Waiting for spectra,
François Teyssier
François Teyssier
http://www.astronomie-amateur.fr
http://www.astronomie-amateur.fr
-
- Posts: 242
- Joined: Sun May 13, 2012 2:46 pm
Re: Low spectra of CH Cyg and BF Cyg required
Hello,
Two low resolution (R 600) spectra of CH Cyg and BF Cyg on 20150420
CH Cyg
BF Cyg
Cheers,
Two low resolution (R 600) spectra of CH Cyg and BF Cyg on 20150420
CH Cyg
BF Cyg
Cheers,
--
Jacques Montier
Societe d'Astronomie de Rennes
IAU code J23
Jacques Montier
Societe d'Astronomie de Rennes
IAU code J23
-
- Posts: 242
- Joined: Sun May 13, 2012 2:46 pm
Re: Low spectra of CH Cyg and BF Cyg required
CH Cyg on 2015/04/28
Regards,
Regards,
--
Jacques Montier
Societe d'Astronomie de Rennes
IAU code J23
Jacques Montier
Societe d'Astronomie de Rennes
IAU code J23
-
- Posts: 625
- Joined: Thu Nov 03, 2011 8:50 pm
Re: Low spectra of CH Cyg and BF Cyg required
Hi to all:
Two news spectra of the CH Cyg.
Regards, J.G.
Two news spectra of the CH Cyg.
Regards, J.G.
- Attachments
-
- _chcyg_20150512_101_J. Guarro.png (5.83 KiB) Viewed 22467 times
-
- Posts: 625
- Joined: Thu Nov 03, 2011 8:50 pm
Re: Low spectra of CH Cyg and BF Cyg required
This is the second.
J.G.
J.G.
- Attachments
-
- _chcyg_20150512_139_J. Guarro.png (7.69 KiB) Viewed 22466 times
-
- Posts: 625
- Joined: Thu Nov 03, 2011 8:50 pm
Re: Low spectra of CH Cyg and BF Cyg required
Hi:
CH Cyg, comparison nights 20150512/0516.
Regards, J.Guarro.
CH Cyg, comparison nights 20150512/0516.
Regards, J.Guarro.
- Attachments
-
- CH Cyg 20150512-0516.png (6.63 KiB) Viewed 22416 times
-
- Posts: 1521
- Joined: Fri Sep 23, 2011 1:01 pm
- Location: Rouen
- Contact:
Re: Low spectra of CH Cyg and BF Cyg required
Impressive evolution
Spectrum obtained last night :
Also, the full spectrum in pdf :http://www.astronomie-amateur.fr/Result ... yssier.pdf
Spectrum obtained last night :
Also, the full spectrum in pdf :http://www.astronomie-amateur.fr/Result ... yssier.pdf
François Teyssier
http://www.astronomie-amateur.fr
http://www.astronomie-amateur.fr
Re: Low spectra of CH Cyg and BF Cyg required
Hello,
A low resolution spectrum of CH Cygni on 2015/08/12 (JD 2457247) at the beginning of the OHP worshop 2015.
Setup : Orion 200 F/5 Newtonian + Alpy 600 + Atik 460EX + Takahashi EM-200.
Regards
Vincent
A low resolution spectrum of CH Cygni on 2015/08/12 (JD 2457247) at the beginning of the OHP worshop 2015.
Setup : Orion 200 F/5 Newtonian + Alpy 600 + Atik 460EX + Takahashi EM-200.
Regards
Vincent
- Attachments
-
- Low resolution spectrum of CH Cygni on 2015/08/12 (JD 2457247) - Vincent Bouttard
- CHCyg_JD2457247_2015-08-12_bouttard.png (17.42 KiB) Viewed 22100 times
-
- Posts: 625
- Joined: Thu Nov 03, 2011 8:50 pm
Re: Low spectra of CH Cyg and BF Cyg required
To All:
Two spectra of CH Cyg.
Regards, J. Guarro.
Two spectra of CH Cyg.
Regards, J. Guarro.
- Attachments
-
- _chcyg_20151122_751_J. Guarro.png (9.03 KiB) Viewed 21963 times
-
- _chcyg_20151123_807_J. Guarro.png (6.63 KiB) Viewed 21963 times
-
- Posts: 1040
- Joined: Mon Aug 31, 2015 11:26 am
Re: Low spectra of CH Cyg and BF Cyg required
Spectre de CH Cyg acquis en fin de nuit il y a 2 jours, à ma grande surprise le continuum est assez plat jusqu'à 3200A, est ce exploitable ou c'est du bruit ?
Le spectre aussi se relève dans le bleu, est ce normal ?
Le spectre aussi se relève dans le bleu, est ce normal ?