Variable Star XZ Cyg

CROSS IDENTIFICATION: XZ Cyg

XZ Cyg = AN 1905.0076 = BD +56 2257 = HD 239124 = SAO 031761 

GCVS result

ID: 310051
Variable star: XZ Cyg
RA 2000: 193229.3
DE 2000: +562317
RA 1950:
DE 1950:
Type of variability: RRAB
Max (mag): 8.9
Min (mag): 10.16
Photometric system: V
Epoch (JD): 44124.440
Period (d): 0.46670
Year of outburst for N, SN:
M-m (or D):
Spectrum: A5-F5
Study reference: 00001
Chart or phot. ref.: 06225
Cases of non-existence:

GCVS NOTE result

[Fe/H] = -1.2. P var. Max = 2417201.241 + 0.4665878*E - "0.000107d*10**(-6)*E**2 (JD2414000 - 35000) [02550] "Max = 2438562.796 + 0.466570d*E (JD2434000 - 39800) Max = 2440445.789 + 0.466497d*E (JD2439800 - 41000) "[06237] "(JD2441000 - 42500) [07424] "0.466438d*E (JD2442500 - 43800) [09101] 2444142.650 + 0.466649d*E (JD2443800 - 44200) "[09102] Besides that the star has a strongly "expressed Blazhko effect "varies, too [07424, 07425]. 0.13P <= M - m <= 0.22P "0.90m <= A(B) <= 1.70m, 0.70m <= A(B) <= 1.30m "-0.05P < O - C < +0.05 "Max A = 2417025.5 + 57.401d*E (JD2417000 - 38500) Max A = 2438881.7 + 58.387d*E (since JD2438500).[09103]. After JD2444000 Blazhko effect period probably decreased to 56.3d [09102].

GCVS NOTES fulltext search:  

NSV: Suspected Variable NSV  not found.

BRKA: Variable star XZ Cyg not found.

MEKA: Variable star XZ Cyg not found.

DSS plate 15'x 15'

Image from the Digitized Sky Survey at the STScI Archive.

 

Please put the variable's designation into field in common style - for example: ZUMa, zuma, V477Cyg, v1182Cyg, NSV 255, nsv2544. Designation of bright variable stars like Beta Persei type in short style (three letters) - bet Per. The complete cross-identification among more then 30 catalogues will be done after submitting.
Spaces and cases are ingnored..


 
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 GCVS (2011)  43.675 records
 NSV (1997) 14.811 records
 BRKA (2001)  1.432 records
 MEKA (2001)  147 records
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