CI Cygni Spectroscopic Monitoring

Symbiotic Star CI Cygni
Spectroscopic Monitoring of the ongoing outburst

May 30 , 2011 update

The symbiotic star CI Cygni has undergone a new outburst (#ATEL 2732, U. Munari & al., 12 Jul 2010). This is the second of a new cycle of outbursts. The last cycle of outbursts (3 outbursts) occured in the 70'. An eclipse of the hot componant will occur during the rising phase of the ungoing outburst. The maximum of the eclipse is expected during november, 2010.
Coordinates (2000.0) : R.A. = 19h50m11s.83, Decl. = +35°41''03

This page gathers amateur spectroscopic results.
First results from this observing campaign : CI Cygni 2010 outburst and eclipse, JAAVSO, 2001 : http://www.aavso.org/ejaavso

The monitoring goes on in order to acquire spectra during quiescence, waiting for a possible third outburst. All observations - low to high resolution - are welcome
(send fit and/or dat files to : francois.teyssier-at-dbmail.com)

30-05-2011
Current magnitude = 10.8V
Current phase = 0.252 [1]

log of observations

line identification

spectral variations

line measurements

links

publications about CI Cygni
and bibliography

[1] Ephemeris : Min(V) = 2442690 + 853.8E
(A. Siviero & al., 2009)

Magnitude V from AAVSO database (JD-2450000) [*]

Log of observations

Obs. #	Date (DD/MM/YYYY)	Observer	Telescope	Exposure	Dispersion (nm/px)	Resolution	Range (nm)	fits files	dat files	notes
#01	30.917 / 06 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	6 x 600 s	0.428	600-700	433-720	_cicyg__cicyg_20100630_teyssier.fit	_cicyg_2010630_teyssier.dat	[1]
#02	24.893 / 07 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	6 x 600 s	0.428	600-700	427-720	_cicyg_20100724_teyssier.fit	_cicyg_20100724_teyssier.dat	*
#03	02.903 / 08 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	6 x 300 s	0.428	600-700	442-730	_cicyg_20100802_teyssier.fit	_cicyg_20100802_teyssier.dat*	*
#04	08.854 / 08 / 2010	Christian Buil	C9 0.23 m LISA 300 l/mm	12 x 240 s	*	*	390-730	* _cicyg_20100808_854.fit	_cicyg_20100808_854.dat	*
#05	09.034 / 08 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	6 x 600 s	0.428	600-700	423-716	_cicyg_20100809_teyssier.fit	_cicyg_20100809_teyssier.dat	*
#06	12.079 / 08 / 2010	Benjamin Mauclaire	Lhires III 2400 l/mm	9 x 600 s	*	*	652-669	ci_cyg_20100812_mauclaire.fit	*	*
#07	18.890 / 08 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	6 x 600 s	0.428	600-700	423-720	_cicyg_20100818_teyssier.fit	_cicyg_2010818_teyssier.dat	*
#08	23.830 / 08 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	5 x 300 s	0.428	600-700	423-720	_cicyg_20100823_teyssier.fit	_cicyg_20100823_teyssier.dat	*
#09	25.848 / 08 / 2010	Christian Buil	C9 0.23 m eShel	12 x 600 s	0.012	11000	390-720	_cicyg_20100825_848.fit*	_cicyg_20100825_buil.dat	*
#10	30.833 / 08 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	9 x 300 s	0.428	600-700	440-720	_cicyg_20100830_teyssier.fit	_cicyg_20100830_teyssier.dat	*
#11	30.848 / 08 / 2010	Christian Buil	C9 0.23 m eShel	12 x 600 s	0.012	11000	390-720	_cicyg_2100080_848.fit	_cicyg_21000830_848.dat
#12	01.926 / 09 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	9 x 300 s	0.214	600-700	440-720	_cicyg_20100901_teyssier.fit	_cicyg_20100901_teyssier.dat	*
#13	03.843 / 09 / 2010	Christian Buil	C11 0.28 m eShel	14 x 600 s	0.012	11000	390-720	_cicyg_21000903_843.fit	_cicyg_21000903_843.dat
#14	03.905 / 09 / 2010	Benjamin Mauclaire	Lhires III 2400 l/mm	7 x 600 s	*	*	651-668	ci_cyg_20100903_905.fit
#15	04.940 / 09 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	4 x 600 s	0.214	600-700	420-718	_cicyg_20100904_teyssier.fit	_cicyg_20100904_teyssier.dat
#16	05.824 / 09 / 2010	Christian Buil	C11 0.28 m eShel	12 x 600 s	0.012	11000	428-712	_cicyg_20100905_824.fit	_cicyg_20100905_824.dat
#17	08.830 / 09 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	5 x 600 s	0.214	600-700	423-718	cicyg_20100908_teyssier.fit	CICyg_20100908_teyssier.dat
#18	10.821 / 09 / 2010	Christian Buil	C11 0.28 m eShel	12 x 600 s	0.012	11000	428-712	_cicyg_20100910_821.fit	_cicyg_20100910_821.dat
#19	10.835 / 09 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	4 x 600 s	0.214	600-700	423-716	cicyg_20100910_teyssier.fit	CICyg_20100910_teyssier.dat
#20	14.806 / 09 / 2010	Christian Buil	C11 0.28 m eShel	14 x 600 s	0.012	11000	428-712	_cicyg_20100914_806.fit	_cicyg_20100914_806.dat
#21	17.883 / 09 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	6 x 600 s	0.214	600-700	423-716	cicyg 20100917_teyssier.fit	cicyg 20100917_teyssier.dat
#22	18.825 / 09 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	6 x 600 s	0.214	600-700	423-716	cicyg_20100918_teyssier.fit	CICyg_20100918_teyssier.dat
#23	21.836 / 09 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	7 x 300 s	0.418	600-700	472-717	_cicyg_20100921_teyssier.fit	_cicyg_20100921_teyssier.dat
#24	21.791 / 09 / 2010	Christian Buil	C11 0.28 m eShel	14 x 600 s	0.012	11000	428-712	_cicyg_20100921_791.fit	_cicyg_20100921_791.dat
#25	22.889 / 09 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	8 x 300 s	0.418	600-700	423-716	_cicyg_20100922_teyssier.fit	_cicyg_20100922_teyssier.dat
#26	25.860 / 09 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	8 x 300 s	0.418	600-700	415-710	_cicyg_20100925_teyssier.fit	_cicyg_20100925_teyssier.dat
#27	30.822 / 09 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	5 x 300 s	0.418	600-700	420-712	_cicyg_20100930_teyssier.fit	_cicyg_20100930_teyssier.dat
#28	7.825 / 10 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	11 x 300 s	0.418	600-700	421-712	_CICyg_20101007_825.fit	Fichiers/cicyg_20101007_825.dat
#29	9.817 / 10 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	11 x 300 s	0.418	600-700	420-712	_cicyg_20101012_825.fit	cicyg_20101012_teyssier.dat
#30	12.821 / 10 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	11 x 300 s	0.418	600-700	420-712	_cicyg_20101012_825.fit	Fichiers/cicyg_20101012_teyssier.dat
#31	14.784 / 10 / 2010	Christian Buil	C11 0.28 m eShel	8 x 600 s	0.012	11000	428-712	_cicyg_20101014_784.fit	_cicyg_20101014_784.dat
#32	14.785 / 10 / 2010	Thierry Garrel	0.21 m Lhires III 2400 l/mm	10 x 960 s	0.0168	15000	650-661	_ci_Cyg_20101014_785.fit
#33	15.767 / 10 / 2010	Christian Buil	C11 0.28 m eShel	8 x 600 s	0.012	11000	428-712	_cicyg_20101015_767.fit	_cicyg_20101015_767.dat
#34	16.847 / 10 / 2010	Thierry Garrel	0.21 m Lhires III 2400 l/mm	15 x 600 s	0.0168	15000	650-661	_ci_Cyg_20101016_847.fit
#35	17.801 / 10 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	16 x 300 s	0.418	600-700	420-710	_cicyg_20101017_801.fit
#36	18.766 / 10 / 2010	Christian Buil	C11 0.28 m eShel	5 x 600 s	0.012	11000	428-712	_cicyg_20101018_766.fit	_cicyg_20101018_766.dat
#37	19.754 / 10 / 2010	Christian Buil	C11 0.28 m eShel	8 x 600 s	0.012	11000	428-712	_cicyg_20101019_754.fit	_cicyg_20101019_754.dat
#38	20.798 / 10 / 2010	Thierry Garrel	0.21 m Lhires III 2400 l/mm	8 x 960 s	0.0168	15000	650-661	_ci_Cyg_20101020_798.fit	ci_cyg_20101020_798_tg.dat
#39	20.809 / 10 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	13 x 300 s	0.418	600-700	420-710	_CICyg_20101020.fit
#40	21.753 / 10 / 2010	Christian Buil	C11 0.28 m eShel	8 x 600 s	0.012	11000	428-712
#41	22.778 / 10 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	15 x 300 s	0.418	600-700	420-710
#42	25.753 / 10 / 2010	Christian Buil	C11 0.28 m eShel	8 x 600 s	0.012	11000	428-712
#43	25.771 / 10 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	12 x 300 s	0.418	600-700	420-710
#44	26.747 / 10 / 2010	Christian Buil	C11 0.28 m eShel	8 x 600 s	0.012	11000	428-712
#45	26.800 / 10 / 2010	Thierry Garrel	0.21 m Lhires III 2400 l/mm	10 x 960 s	0.0168	15000	650-661
#46	27.754 / 10 / 2010	Christian Buil	C11 0.28 m eShel	8 x 600 s	0.012	11000	428-712
#47	28.750 / 10 / 2010	Christian Buil	C11 0.28 m eShel	8 x 600 s	0.012	11000	428-712
#48	29.869 / 09 / 2010	Benjamin Mauclaire	Lhires III 2400 l/mm	5 x 600 s	*	*	651-668			low snr
#49	30.791 / 10 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	12 x 300 s	0.418	600-700	420-710
#50	31.785 / 10 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	12 x 300 s	0.418	600-700	420-710
#51	31.795 / 10 / 2010	Thierry Garrel	0.21 m Lhires III 2400 l/mm	10 x 960 s	0.0168	15000	650-661
#52	01.775 / 11 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	12 x 300 s	0.418	600-700	420-710
#53	03.739 / 11 / 2010	Thierry Garrel	0.21 m Lhires III 2400 l/mm	10 x 960 s	0.0168	15000	650-661
#54	05.769 / 11 / 2010	Thierry Garrel	0.21 m Lhires III 2400 l/mm	10 x 960 s	0.0168	15000	650-661
#55	07.744 / 11 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	12 x 300 s	0.418	600-700	420-710
#56	10.732 / 11 / 2010	Thierry Garrel	0.21 m Lhires III 2400 l/mm	10 x 960 s	0.0168	15000	650-661
#57	18.787 / 11 / 2010	Benjamin Mauclaire	Lhires III 2400 l/mm	14 x 600 s	*	*	652-669
#58	20.755 / 11 / 2010	Thierry Garrel	0.21 m Lhires III 2400 l/mm	10 x 960 s	0.0168	15000	650-661
#59	20.773 / 11 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	8 x 600 s	0.418	600-700	440-710
#60	24.713 / 11 / 2010	Thierry Garrel	0.21 m Lhires III 2400 l/mm	10 x 960 s	0.0168	15000	650-661
#61	26.813 / 11 / 2010	Thierry Garrel	0.21 m Lhires III 2400 l/mm	10 x 960 s	0.0168	15000	651-661
#62	03.790 / 12 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	16 x 300 s	0.418	600-700	440-710
#63	08.728 / 12 / 2010	Thierry Garrel	0.21 m Lhires III 2400 l/mm	4 x 960 s	0.0168	15000	650-661
#64	11.746 / 12 / 2010	Thierry Garrel	0.21 m Lhires III 2400 l/mm	10 x 960 s	0.0168	15000	650-661
#65	12.742 / 12 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	12 x 300 s	0.418	600-700	440-710
#66	13.715 / 12 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	12 x 200 s	0.418	600-700	440-710
#67	14.713 / 12 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	12 x 200 s	0.418	600-700	440-710
#68	25.750 / 12 / 2010	François Teyssier	SC 0.25 m Lhires III 150 l/mm	7 x 300 s	0.418	600-700	440-710
#69	26.751 / 12 / 2010	Thierry Garrel	0.21 m Lhires III 2400 l/mm	10 x 960 s	0.0168	15000	650-661
#70	02.731 / 01 / 2011	François Teyssier	SC 0.25 m Lhires III 150 l/mm	7 x 300 s	0.418	600-700
#71	10.747 / 01 / 2011	Thierry Garrel	0.21 m Lhires III 2400 l/mm	6 x 960 s	0.0168	15000	650-661
#72	24.731 / 01 / 2011	Thierry Garrel	0.21 m Lhires III 2400 l/mm	5 x 960 s	0.0168	15000	650-661
#73	05.189 / 03 / 2011	François Teyssier	SC 0.25 m Lhires III 150 l/mm	8 x 600 s	0.418	600-700	440-713
#74	19.171 / 03 / 2011	François Teyssier	SC 0.25 m Lhires III 150 l/mm	3 x 600 s	0.418	600-700	440-713
#75	26.174 / 03 / 2011	François Teyssier	SC 0.25 m LISA 300 l/mm	3 x 600 s		1000	400-720
#76	19.074 / 04 / 2011	Christian Buil	C11 0.28 m LISA 300 l/mm	12 x 300 s		1000	400-750
#77	20.131 / 04 / 2011	François Teyssier	SC 0.25 m LISA 300 l/mm	3 x 600 s		1000	400-720
#78	22.051 / 04 / 2011	Valèrie Desnoux	SC 0.23 cm Lhires III 1200 l/mm	9 x 300 s	0.041	~10000	627-694
#79	26.995 / 04 / 2011	Thierry Garrel	0.21 m Lhires III 2400 l/mm	5 x 960 s	0.0168	15000	650-661
#80	20.994 / 05 / 2011	François Teyssier	SC 0.25 m LISA 300 l/mm	8 x 120 s	0.25	1000	400-730
#81	26.995 / 04 / 2011	Thierry Garrel	SC 0.36m eShel	5 x 960 s	0.012	15000	443-688

[1] spectral calibration on Ha and Hb - flux calibrated by intrumental response obtained on Vega - relative intensity to flux = 1 in the zone 595-605 nm

Rem : click on the Obs#number opens an image of the spectrum

Line identification

by F. Teyssier on june 30th, at the begining of the outburst. Note the high ionization lines [Fe VII] 5721 6087 (#1)

by C. Buil on august 25th (#9)

H alpha profile by Benjamin Mauclaire (#6)

Spectral variations

Outburst early stage

F. Teyssier Spectra #1 and #3

Note the evolution of TiO bands and the decrease of the highly ionized lines [Fe VII] in the early stage of the outburst

Eclipse ingress

Lines profile evolution at the begining of the eclise ingress by Christian Buil

The same in low resolution

After the outburst

19.03.2011 low resolution spectrum - High ionization lines such HeII and [FeVII] lines strongly increase

C.Buil (19/04) and F.Teyssier (20/04) spectra comparison. The two spectras obtained with a LISA spectrograph (Shelyak Instruments) :

T. Garrel 2011-01-24 Lhires III 2400 l/mm V. Desnoux 2011-04-22 Lhires III 1200 l/mm

H alpha profile evolution

2010-11-26 Phase = 0.035 2011-04-26 Phase = 0.206

Ha and Hb profiles

2010-05-25 Phase = 0.245 2011-05-25 Phase = 0.245

Line measurement

AAVSO CCD V = green line, right vertical scale

			H alpha equivalent width (angströms) Blue : Teyssier (Lhires III) Red : Buil (eShel) Integration betweem 652 and 660 nm for eShel between 651 and 661 for Lhires AAVSO CCDV : green line
			(H alpha / H béta) ratio blue plots vs. CCDV magnitude (AAVSO data) green line
			H béta equivalent width (angströms)


	He II 4686 equivalent width (angströms)		He II 4686 relative to H Béta = 100

	He I 5876 equivalent width (angströms)		He I 5876 EW relative to H béta = 100

	[OIII]/HeI 5018 ratio (blue dots) and Mag V (solid green line)

	[TiO]1 index as defined in Kenyon & Fernadez-Castro (1987)		Type Spectral déterminé à partir de l'indice [TiO]2

Luminosity comparison according phase computed with A. Siviero & al., 2009 Ephemeris
Min(V) = 2442690 + 853.8E

dotted line : 1975 eclipse : AAVSO Visual 10 days mean
solid line : current eclipse : AAVSO CCD V


CI Cyg profile with a Star Analyser By Eric Sarrazin 19/09/2010	CI Cyg profile with a Star Analyser By Pierre Dubreuil 11/12/2010

See also:

http://astrosurf.com/buil/cicyg/obs.htm

http://www.astronomie-amateur.fr/feuilles/Spectroscopie/SyS/CI%20Cyg.html

http://gabalou.canalblog.com/

and AAVSO web page :

http://www.aavso.org/vsots_cicyg

Publications about CI Cygni

CI Cygni 2010 outburst and eclipse, JAAVSO, 2001 : http://www.aavso.org/ejaavso

2009MNRAS.399.2139S
Mon. Not. R. Astron. Soc., 399, 2139-2145 (2009)
The ongoing 2008-09 outburst of CI Cyg.
SIVIERO A., MUNARI U., DALLAPORTA S., VALISA P., LUPPI V., MORETTI S., TOMASELLI S., BACCI S., BALLARDINI F., CHERINI G., GRAZIANI M., FRIGO A. and VAGNOZZI A.

1991AJ....101..637K
Astron. J., 101, 637-654 (1991)
On the nature of the symbiotic binary CI Cygni.
KENYON S.J., OLIVERSEN N.A., MIKOLAJEWSKA J., MIKOLAJEWSKI M., STENCEL R.E., GARCIA M.R. and ANDERSON C.M.

1985AcA....35...65M
Acta Astron., 35, 65-95 (1985)
On the nature of CI Cygni.
MIKOLAJEWSKA J.

1985IBVS.2834....1G
IAU Inform. Bull. Var. Stars, 2834, 1-4 (1985)
Photometry and spectrophotometry of symbiotic stars : CI Cyg, Z And, V1016 Cyg, HM Sge, HBV 475.
GRAVINA R.

1983AcA....33..403M
Acta Astron., 33, 403-429 (1983)
A spectrophotometric study of CI Cygni during the 1980 eclipse.
MIKOLAJEWSKA J. and MIKOLAJEWSKI M.

1983ApJ...268..250O
Astrophys. J., 268, 250-263 (1983)
Observational studies of the symbiotic stars. II. Emission-line relative intensity variations in CI Cygni, BF Cygni, AX Persei, and V1016 Cygni.
OLIVERSEN N.A. and ANDERSON C.M.

1983IBVS.2355....1M
IAU Inform. Bull. Var. Stars, 2355, 1-4 (1983)
Emission line intensity varations during the 1982 eclipse of CI Cygni.
MIKOLAJEWSKA J.

1981A&A....94..290I
Astron. Astrophys., 94, 290-293 (1981)
Spectrophotometric observations of CI Cyg in 1979.
IIJIMA T.

1981A&AS...46..257F
Astron. Astrophys., Suppl. Ser., 46, 257-261 (1981)
Observations spectroscopiques de CI Cygni.
FEHRENBACH C. and CHUN H.C.

1981IBVS.1945....1G
IAU Inform. Bull. Var. Stars, 1945, 1-2 (1981)
Spectroscopic observations of CI Cyg in 1980.
GRAVINA R.

1981IBVS.2041....1G
IAU Inform. Bull. Var. Stars, 2041, 1-4 (1981)
Spectroscopic observations of symbiotic stars in July and September 1981.
GRAVINA R.

1980IBVS.1759....1G
IAU Inform. Bull. Var. Stars, 1759, 1-2 (1980)
Spectroscopic observations of CI Cygni in 1978 and 1979.
GRAVINA R.

1954AnAp...17....6T
Ann. Astrophys., 17, 6 (1954)
Les spectres de BF Cygni, AX Persei et CI Cygni en 1952.
TCHENG M.L. and BLOCH M.

Other références

1987AJ.....93..938K
Astron. J., 93, 938-949 (1987)
The cool components of symbiotic stars. I. Optical spectral types.
KENYON S.J. and FERNANDEZ-CASTRO T.

Bibliography

The symbiotic stars, S.J. Kenyon, Cambridge University Press (1986, 2008)

[*] Aknowlegment to AAVSO CCD observers : Geir Klingenberg (KGE), Jan Suomela (SJAR), David Lane (LDJ), Menzies Kenneth (MZK), Teofilo Arranz (ATE), Tim Crowford (CTX), Douglas Slanson (SDN)

Conditions for use of data in publications
Note there is no validation check prior to adding spectra to this table. Users should verify the quality of the spectra with the observers concerned.
Use of these data in research publications is encouraged subject to the following conditions:
* The observers concerned should be contacted to confirm the particular acquisition and data reduction procedures used.
* Observers contributing a significant amount of data or whose data are pivotal to the findings of the paper should be included as co-authors; others should be thanks in the text.

Back


T. Garrel 2011-01-24 Lhires III 2400 l/mm	V. Desnoux 2011-04-22 Lhires III 1200 l/mm