J/A+AS/119/281 UBV(RI)c photometry of active stars. (Cutispoto, 1996)
Long-term monitoring of active stars. V. UBV(RI)c photometry collected in
Feb-Mar 1990.
Cutispoto G.
<Astron. Astrophys. Suppl. Ser. 119, 281 (1996)>
=1996A&AS..119..281C 1996A&AS..119..281C (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Photometry, UBVRI ; Photometry, Cousins
Keywords: stars: activity - stars: late-type - stars: variables
Description:
High-precision UBV(RI)c photometry of 12 selected active stars,
collected at the European Southern Observatory (La Silla, Chile) over
the period February-March 1990, is presented. Significant evolution
of the light curves, period variations and, in most cases, evidence
for long-term variability of the global degree of spottedness are
found. Some of the spectral classifications are discussed. This paper
is part of a more extensive program focusing on the global properties
and evolution of active stars and is aimed at establishing a
time-extended photometric database which can give important clues on
topics such as the stability of the spotted areas, differential
rotation and solar-like cycles.
For a description of the UBV and (RI)c photometric systems, see e.g.
General Catalog of Photometric Data GCPD/01 and GCPD/54.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table 115 127 UBVRI photometry
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See also:
J/A+AS/121/369 : UBVRI observations of active stars. VI. (Cutispoto, 1997)
J/A+AS/127/207 : UBV(RI)c photometry of active stars. VII. (Cutispoto, 1998)
J/A+AS/131/321 : UBV(RI)c photometry of active stars. VIII. (Cutispoto, 1998)
J/A+A/367/910 : UBV(RI)c photometry of active stars. IX. (Cutispoto+, 2001)
J/A+A/400/659 : UBV(RI)c photometry of active stars. X (Cutispoto+, 1003)
Byte-by-byte Description of file: table
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Bytes Format Units Label Explanations
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1- 9 A9 --- HD HD number
13- 20 A8 --- Name Other name
22- 43 A22 --- Date Observation period
46- 57 F12.4 d HJD Heliocentric Julian day
61- 65 F5.4 --- Phase [0/1[ Corresponding phase (1)
71- 75 F5.3 mag Vmag V magnitude
81- 85 F5.3 mag U-B ? U-B color index
91- 95 F5.3 mag B-V B-V color index
101-105 F5.3 mag V-Rc V-Rc color index
111-115 F5.3 mag V-Ic V-Ic color index
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Note (1): The phases are computed by using the following ephemeris:
HD 26354 = AG Dor, HJD = 2447587.52 + 2.533 x E
HD 45088 = OU Gem, HJD = 2443846.2 + 7.36 x E
HD 82558 = LQ Hya, HJD = 2445275.993 + 1.6092 x E
HD 98712 = SZ Crt, HJD = 2441389.0 + 11.58 x E
HD 101309 = V829 Cen, HJD = 2447570.53 + 11.65 x E
HD 102077 = V838 Cen, HJD = 2445805.4 + 1.88 x E
HD 106225 = HU Vir, HJD = 2445214.7 + 10.50 x E
HD 119285 = V851 Cen, HJD = 2447949.5 + 11.50 x E
HD 127535 = V841 Cen, HJD = 2445804.1 + 5.929 x E
HD 136905 = GX Lib, HJD = 2445061.901 + 11.13448 x E
HD 139084 = V343 Nor, HJD = 2445801.9 + 4.25 x E
HD 155555 = V824 Ara, HJD = 2445803.07 + 1.681652 x E
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Courtesy: G. Cutispoto
References:
Rodono & Cutispoto, Paper I 1992A&AS...95...55R 1992A&AS...95...55R
Cutispoto Paper II 1992A&AS...95..397C 1992A&AS...95..397C
Cutispoto Paper III 1993A&AS..102..655C 1993A&AS..102..655C
Cutispoto Paper IV 1995A&AS..111..507C 1995A&AS..111..507C
Cutispoto & Leto Paper VI 1997A&AS..121..369C 1997A&AS..121..369C, Cat. J/A+AS/121/369
Cutispoto Paper VII 1998A&AS..127..207C 1998A&AS..127..207C, Cat. J/A+AS/127/207
Cutispoto Paper VIII 1998A&AS..131..321C 1998A&AS..131..321C, Cat. J/A+AS/131/321
Cutispoto et al., Paper IX 2001A&A...367..910C 2001A&A...367..910C, Cat. J/A+A/367/910
Cutispoto et al., Paper X 2003A&A...400..659C 2003A&A...400..659C, Cat. J/A+A/400/659
(End) Patricia Bauer [CDS] 26-Apr-1996