J/AZh/85/409 V1357 Cyg spectroscopic monitoring in 2002-04 (Karitskaya+, 2008)
Spectroscopic monitoring of V1357 CYG = CYG X-1 in 2002-2004.
Karitskaya E.A., Bochkarev N.G., Bondar A.V., Galazutdinov G.A., Lee B.-K.,
Musaev F.A., Sapar A.A., Shimansky V.V.
<Astron. Zh. 85, 409 (2008)>
=2008AZh....85..409K 2008AZh....85..409K
=2008ARep...52..362K 2008ARep...52..362K
ADC_Keywords: Binaries, X-ray; Spectroscopy; Line Profiles
Abstract:
The results of Cyg X-1 = HDE 226868/V1357 Cyg optical spectral
monitoring in 2002-2004 are discussed. Spectral observations were
carried out on Peak Terskol Observatory (Kabardino-Balkaria, Russia,
resolution R=45000 and 13000) and Bohyunsan Optical Astronomy
Observatory (BOAO, Korea, R=30000, 44000). Each spectrum covers the
main part of optical spectral range. During 33 observational nights 75
echelle spectra were obtained in the times of the "soft" and "hard"
states of Cyg X-1. The X-ray influence on spectral line profiles was
studied. The RXTE/ASM data were used for this purpose. The X-ray flare
resulted in strong variations of Halpha and HeII4686Å emission
component profiles during night. This behaviour we connect with
variations of ionization structure of matter in the system. Line
profile variations with the orbital phase were observed. The spectral
atlas for Cyg X-1 was constructed. The contented line identification
was done. There were revealed 172 lines and blends which belong to 12
chemical elements: H, He, C, N, O, Ne, Mg, Al, Si, S, Fe, Zn. The
HDE 226868 spectral classification as ON star was confirmed.
Objects:
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RA (2000) DE Designation(s)
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19 58 21.676 +35 12 05.78 V1357 Cyg = X Cyg X-1 = HD 226868
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 72 34 Log of observations of V1357 Cyg
table2.dat 25 194 Stellar lines identified in the spectrum of
V1357 Cyg
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See also:
J/PAZh/26/27 : Variability of Cyg X-1 in 1995-1996 (Karitskaya+, 2000)
J/AZh/78/408 : Variability of Cyg X-1 in 1994-1998 (Karitskaya+, 2001)
J/A+A/407/1039 : X-ray power spectra of Cygnus X-1 (Pottschmidt+, 2003)
J/A+A/452/975 : Temporal variability of Cygnus X-1 (Axelsson+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Running number of night observations
5- 14 A10 "DD/MM/YYYY" Date Observation date
17- 19 A3 --- Inst Instrument used (1)
22 I1 --- Nsp Total number of spectra
25- 35 F11.3 d JD Julian date
38- 42 F5.3 --- Phase Orbital phase
45- 48 F4.2 --- Ph147 Phase of the 147-days period
51- 54 F4.2 --- Ph294 Phase of the 294-days period
57- 59 I3 ct/s FX X-ray fluxes according to 2-12keV
RXTE/ASM data
60 A1 --- u_FX Uncertainty flag on FX
63- 72 A10 --- Xray X-ray spectrum state (2)
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Note (1): Instruments as follows:
t = Terskol, Coude spectrograph at 2-m telescope,
spectral resolution 45000
cs = Terskol, echelle spectrograph at Cassegrain focus at 2-m
telescope, spectral resolution 13000
csb = Terskol, echelle spectrograph at Cassegrain focus at 2-m
telescope, with CCD more sensitive in the blue
k30 = Optical fiber echelle spectrograph of 1.84-m telescope,
Bohyunsan Observatory, South Korea, spectral resolution 30000
k44 = Optical fiber echelle spectrograph of 1.84-m telescope,
Bohyunsan Observatory, South Korea, spectral resolution 44000
Note (2): "hard" and "soft" correspond to hard and soft X-ray states of
Cyg X-1 according to the RXTE/ASM data (arrows note transition states
of the X-ray spectrum)
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 7 F7.2 0.1nm LambdaO ? Observed wavelength
11- 15 A5 --- El Element
18- 25 F8.3 0.1nm LambdaL Laboratory wavelength
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(End) Veta Avedisova [INASAN] 21-Nov-2008