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J/AJ/120/1548       V523 Cas UBVRCIC photometry          (Elias+, 2000)

Photospheric spots and a chromospheric plage on V523 Cassiopeiae Elias II N.M., Koch R.H. <Astron. J. 120, 1548 (2000)> =2000AJ....120.1548E
ADC_Keywords: Binaries, eclipsing ; Photometry, UBVRI Keywords: binaries: close - binaries: eclipsing - stars: individual (V523 Cassiopeiae) - stars: late-type - stars: spots Abstract: The cool, overcontact, close binary, V523 Cassiopeiae was observed with the 1 m reflector at the US Naval Observatory, Flagstaff Station. The photometry was very good, with a precision on the order of a few millimagnitudes, but not numerous enough for complete light-curve analyses (e.g., differential corrections). A conventional published synthesis has been found acceptable as a fiducial model, and most of the observational weight has been used to develop a spot model for the stars and to support the validity of theoretical limb-darkening coefficients. Both photospheres and chromospheres contribute to the model. This result indicates that multifilter measures of this and similarly cool binaries are necessary for fuller descriptions of stellar activity cycles. A number of newly determined times of minimum light solidify the published rate of period variability. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 00 40 06 +50 13.0 V523 Cas ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 77 17 Comparison star {DELTA}Mi for UBVRCI_C filters table3.dat 30 488 V523 Cassiopeiae delmags
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 2 I2 --- ID [2/18] Comparison star number 4- 10 F7.4 mag Umag U magnitude 12- 17 F6.4 mag e_Umag rms uncertainty on Umag 19- 25 F7.4 mag Bmag B magnitude 27- 32 F6.4 mag e_Bmag rms uncertainty on Bmag 34- 40 F7.4 mag Vmag V magnitude 42- 47 F6.4 mag e_Vmag rms uncertainty on Vmag 49- 55 F7.4 mag Rcmag RC magnitude (Cousins) 57- 62 F6.4 mag e_Rcmag rms uncertainty on Rcmag 64- 70 F7.4 mag Icmag IC magnitude (Cousins) 72- 77 F6.4 mag e_Icmag rms uncertainty on Icmag
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 13 F13.5 d HJD Heliocentric Julian date 15 A1 --- Filt [UBVRI] Filter 17- 23 F7.4 mag delmag Differential magnitude in filter (1) 25- 30 F6.4 mag e_delmag rms uncertainty on delmag
Note (1): Average system differential magnitudes ("delmags") for comparison stars 2 through 18 versus V523 Cas.
History: From AJ electronic version
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 25-Sep-2000
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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