J/AZh/79/542 BV photometry of active K-M dwarfs (Bondar, 2002)
Variability of the photospheric radiation of active K-M dwarfs and
their X-ray luminosities.
Bondar N.I.
<Astron. Zh. 79, 542 (2002)>
=2002AZh....79..542B 2002AZh....79..542B
=2002ARep...46..489B 2002ARep...46..489B
ADC_Keywords: Stars, dwarfs; Photometry, UBV
Abstract:
Variability of the photospheric radiation of 40 (dKe-dMe) dwarfs due
to variations in the spottedness of their surfaces is analyzed based
on the behavior of their mean annual brightnesses over long time
intervals.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 87 40 Objects of our studies of long-term brightness
variations
table2.dat 53 40 Variations in the mean annual brightness of
40 (dKe-dMe) dwarfs
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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- 9 A9 --- Name Name of the star
12- 18 A7 --- GJ Gliese designation
25- 26 I2 h RAh Right Ascension (1950) (hours)
28- 31 F4.1 min RAm Right Ascension (1950) (minutes)
33 A1 --- DE- Declination (1950) (sign)
34- 35 I2 deg DEd Declination (1950) (degrees)
37- 40 F4.1 arcmin DEm Declination (1950) (minutes)
43- 47 F5.2 mag Vmag ? V magnitude
49- 52 F4.2 mag B-V ? B-V color
55- 65 A11 --- SpType Spectral type
68- 78 A11 --- Type Star type (1)
80- 87 A8 --- Ref References (2)
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Note (1): Star type:
SB1, SB2: spectral binary
VB: visual binary
AB: astrometric binary
EB: eclipsing binary
T: triple system
F: flare star
BY: BY Dra variable
Note (2): References:
20: Gershberg et al. 1999, Cat. J/A+AS/139/555
27: Pettersen, 1991MmSAI..62..217P 1991MmSAI..62..217P
28: White et al., 1989ApJS...71..895W 1989ApJS...71..895W
29: Griffin & Emerson, 1975Obs....95...23G 1975Obs....95...23G
31: Doyle & Butler, 1990A&A...235..335D 1990A&A...235..335D
32: Petterson & Tsvetkov, 1985IBVS.2660....1P 1985IBVS.2660....1P
33: Gliese & Jahreiss, 1979A&AS...38..423G 1979A&AS...38..423G
34: Petterson et al., 1985AJ.....90.2296P 1985AJ.....90.2296P
35: Strassmeier et al. 1988A&AS...72..291S 1988A&AS...72..291S, See Cat. V/76
36: Cowley & Hartwick, 1982ApJ...253..237C 1982ApJ...253..237C
37: Young et al. 1984, Proc. 3rd Cambridge Workshop on cool stars,
Stellar System and the Sun, 112
38: Byrne & McKay, 1990A&A...227..490B 1990A&A...227..490B
39: Bopp, 1987ApJ...317..781B 1987ApJ...317..781B
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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- 9 A9 --- Name Name of the star
12- 20 A9 yr TimeInt Time interval studied
23- 25 I3 --- PlateN Number of plates
28- 30 A3 --- Coll Collections (1)
32 A1 --- l_Ampl [~] Limit flag on Ampl
33- 36 F4.2 mag Ampl Variability amplitude
40- 44 A5 yr TimeScale Variability time scale
49- 53 A5 --- VarType Type of variability (2)
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Note (1): Collections:
1: Sternberg Astronomical Institute
2: Odessa Observatory
3: Sonneberg Observatory
Note (2): Type of variability:
cyc: cyclic
var: irregular
?: unknown
const: constant brightness level within the accuracy of the
photographic measurements
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(End) Veta Avedisova (INASAN) 01-Dec-2002