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J/AJ/141/44         V396 Mon BVRI light curves               (Liu+, 2011)

Period changes and four-color light curves of the active overcontact binary V396 Monocerotis. Liu L., Qian S.-B., Liao W.-P., He J.-J., Zhu L.-Y., Li L.-J., Zhao E.-G. <Astron. J., 141, 44 (2011)> =2011AJ....141...44L
ADC_Keywords: Binaries, eclipsing ; Photometry, UBVRI Keywords: binaries: close - binaries: eclipsing - stars: evolution - stars: individual (V396 Mon) Abstract: This paper analyzes the first obtained four-color light curves of V396 Mon using the 2003 version of the W-D code. It is confirmed that V396 Mon is a shallow W-type contact binary system with a mass ratio q=2.554(±0.004) and a degree of contact factor f=18.9%(±1.2%). A period investigation based on all available data shows that the period of the system includes a long-term decrease (dP/dt=-8.57x10-8days/yr) and an oscillation (A3=0.0160day, T3=42.4yr). They are caused by angular momentum loss and light-time effect, respectively. The suspect third body is possibly a small M-type star (about 0.31 solar mass). Description: We carried out new CCD photometric observations of V396 Mon in the BVRI bands on 2009 November 16 and 17, using the 1024x1024 PI1024 BFT camera attached to the 85cm telescope at the Xinglong Station of the National Astronomical Observatories of Chinese Academy of Sciences. The filter system was a standard Johnson-Cousins-Bessel multicolor CCD photometric system built on the primary focus. Objects: ---------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------- 06 38 36.48 +03 36 17.1 V396 Mon = SV* HBV 379 ---------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 20 289 The original data of V396 Mon in the B band table2.dat 20 291 The original data of V396 Mon in the V band table3.dat 20 290 The original data of V396 Mon in the R band table4.dat 20 291 The original data of V396 Mon in the I Band table5.dat 35 14 New CCD times of light minimum for V396 Mon
Byte-by-byte Description of file: table1.dat table2.dat table3.dat table4.dat
Bytes Format Units Label Explanations
1- 12 F12.4 d HJD Heliocentric Julain date (245515?.????) (1) 14- 18 F5.3 mag Dmag Differential magnitude in Band 20 A1 --- Band [BVRI] Observed band
Note (1): Observed by the 85cm Telescope at Xinglong Base, National Observatory.
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 13 F13.5 d HJD Heliocentric Julain date 15- 21 F7.5 d e_HJD rms uncertainty on HJD 23- 25 A3 --- Meth [CCD] Method 27- 28 A2 --- Min [I II] Type of minimum 30 A1 --- Filt [BVRI] Filter 32- 35 A4 --- Tel Telescope (1)
Note (1): Telescopes as follows: 1m = 1m R-C reflect telescope in Yunnan Observatory 85cm = 85cm reflect telescope in Xinglong Observation base
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 24-Jul-2012
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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