J/AJ/136/594 BS Cas BVR light curves (Yang+, 2008)
A photometric study of the neglected eclipsing binary BS Cassiopeiae.
Yang Y.-G., Wei J.-Y., He J.-J.
<Astron. J., 136, 594-601 (2008)>
=2008AJ....136..594Y 2008AJ....136..594Y
ADC_Keywords: Binaries, eclipsing ; Photometry, CCD ; Photometry, UBVRI
Keywords: binaries: close - binaries: eclipsing -
stars: individual (BS Cassiopeiae)
Abstract:
We present multicolor charge-coupled device (CCD) photometry for the
eclipsing binary BS Cassiopeiae, observed on four nights between 2007
December and 2008 January. Using the Wilson-Devinney program, the
photometric solution was derived from our BVR observations.
Photometric results indicated that BS Cas is a W-subtype binary, whose
mass ratio and overcontact degree are q=0.2834(±0.0010) and
f=31.6%(±1.1%), respectively. Light curves of BS Cas present a
typical O'Connell effect, which may be attributed to dark spot
activity of the primary component.
Description:
Photoelectric observations of BS Cas were made with the 85cm
telescope at Xinglong Station of the National Astronomical
Observatories of the Chinese Academy of Sciences (NAOC), equipped with
a primary-focus multicolor CCD photometer.
Objects:
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RA (2000) DE Designation(s)
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01 21 38.6 +59 10 27 BS Cas = 2MASS J01213857+5910268
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 56 455 CCD photometric observations in BVR-bands for
the eclipsing binary BS Cas
table4.dat 64 70 Available light minimum times
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD-B ? Heliocentric Julian Date of B band observation
14- 18 F5.3 mag DBmag ? Differential B band magnitude
20- 31 F12.4 d HJD-V ? Heliocentric Julian Date of V band observation
33- 37 F5.3 mag DVmag ? Differential V band magnitude
39- 50 F12.4 d HJD-R Heliocentric Julian Date of R band observation
52- 56 F5.3 mag DRmag Differential R band magnitude
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian date
14- 21 F8.1 --- E Cycle number
23- 25 A3 --- Met Method used: ccd, pg (photographic) or vi (visual)
27- 28 A2 --- Min [I II] Minimum (I or II)
31- 37 F7.4 d (O-C)1 (O-C) from Eq. (2) (1)
39- 45 F7.4 d (O-C)2 (O-C) from Eq. (3) (1)
47- 53 F7.4 d (O-C)3 ? (O-C) from Eq. (5) (1)
55- 61 F7.4 d (O-C)4 ? (O-C) from Eq. (6) (1)
63- 64 I2 -- Ref Reference (2)
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Note (1):
* For O-C1 and O-C2: Min.I=HJD2427984.7395+0.44047629*E
(O-C)1=-0.0270(±0.0007)+7.81(±0.01)x10-6E-1.48(±0.01)x10-10E2
(O-C)2=-0.0005(±0.0002)
+0.0023(±0.0014)*sin[5.72(±0.24)E+4.4736(±1.3565)]
* For (O-C)3 and (O-C)4:
Min.I=HJD2454489.3850(±0.0042)+0.44046828(±0.00000008)*E.
(O-C)3=60.2617(±0.0002)+9.81(±0.01)*10-6E-0.91(±0.01)*10-10E2
(O-C)4=-0.0000(±0.0002)
+0.0018(±0.0010)*sin[5.79(±0.26)E+3.7177(±1.4380)]
Note (2): References as follows:
1 = Ahnert et al. (1947VeSon...1...43A 1947VeSon...1...43A)
2 = Huebscher et al. (1992, BAV Mitt., 60)
3 = Huebscher (2005IBVS.5643....1H 2005IBVS.5643....1H)
4 = Blaettler (1997, BBSAG Bull., 114, 5)
5 = Diethelm (1998, BBSAG Bull., 117, 4)
6 = Blaettler (2001, BBSAG Bull., 125, 3)
7 = Dvorak (2003IBVS.5378....1D 2003IBVS.5378....1D)
8 = Krajci (2005IBVS.5592....1K 2005IBVS.5592....1K)
9 = Pribulla et al. (2005IBVS.5668....1P 2005IBVS.5668....1P)
10 = Huebscher et al. (2005IBVS.5657....1H 2005IBVS.5657....1H)
11 = Sobotka (2007IBVS.5809....1S 2007IBVS.5809....1S)
12 = Dvorak (2006IBVS.5677....1D 2006IBVS.5677....1D)
13 = Kim et al. (2006IBVS.5694....1K 2006IBVS.5694....1K)
14 = Huebscher & Walter (2007IBVS.5761....1H 2007IBVS.5761....1H)
15 = Huebscher et al. (2006IBVS.5731....1H 2006IBVS.5731....1H)
16 = Parimucha et al. (2007IBVS.5777....1P 2007IBVS.5777....1P)
17 = Dogru et al. (2007IBVS.5795....1D 2007IBVS.5795....1D)
18 = Brat et al. (2007, Open Eur. J. Variable Stars, 74, 1)
19 = Present work
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 12-Feb-2011