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J/A+A/400/659       UBV(RI)c photometry of active stars. X.  (Cutispoto+, 2003)

Long-term monitoring of active stars. X. Photometry collected in 1994. Cutispoto G., Messina S., Rodono M. <Astron. Astrophys. 400, 659 (2003)> =2003A&A...400..659C
ADC_Keywords: Stars, variable ; Photometry, UBVRI ; Photometry, Cousins ; Stars, flare Keywords: stars: activity - stars: late-type - stars: pre-main sequence - stars: variables: general - X-ray stars Abstract: As part of an extensive program focused on the global properties and evolution of active stars, high-precision UBV(RI)c and UBV photometry of 18 selected stars is presented. UBV(RI)c observations were collected at the European Southern Observatory over the intervals 21-28 September 1994 and 25 November - 05 December 1994. Additional UBV photometry obtained late in 1994 by Catania Astrophysical Observatory Automatic Photoelectric Telescope is also presented. Significant evolution of the light curves, period variations and evidence for long-term variability of the global degree of spottedness are found. Some spectral classifications are revised and photometric parallaxes are compared, whenever possible, with the values measured by the Hipparcos satellite. These observations are finalized to the construction of an extended photometric database, which can give important clues on topics such as the stability of spotted areas, differential stellar rotation, solar-like activity cycles and the correlation between inhomogeneities at different atmospheric levels. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file position.dat 80 57 Star positions from Simbad table1.dat 79 19 Summary of photometric observations table3.dat 91 18 Summary of stellar data table4.dat 37 36 V-band magnitude and colors obtained for the comparison (c) and check (ck) stars obtained at ESO tables.tex 80 169 LaTex version of tables 1-4 ubvri.dat 71 264 UBV(RI)c data obtained at La Silla observatory
See also: J/A+AS/119/281 : Long-term monitoring of active stars. V. (Cutispoto, 1996) J/A+AS/121/369 : Long-term monitoring of active stars. VI. (Cutispoto, 1997) J/A+AS/127/207 : Long-term monitoring of active stars. VII. (Cutispoto 1998) J/A+AS/131/321 : Long-term monitoring of active stars. VIII. (Cutispoto 1998) J/A+A/367/910 : Long-term monitoring of active stars. IX. (Cutispoto+, 2001) Byte-by-byte Description of file: position.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Star Star names (program, comparison and check) 16- 17 I2 h RAh Right ascension (J2000.0) 19- 20 I2 min RAm Right ascension (J2000.0) 22- 25 F4.1 s RAs Right ascension (J2000.0) 27 A1 --- DE- Declination sign (J2000.0) 28- 29 I2 deg DEd Declination (J2000.0) 31- 32 I2 arcmin DEm Declination (J2000.0) 34- 35 I2 arcsec DEs Declination (J2000.0)
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Star Program star name (v) 12- 28 A17 --- OName Other name of program star 30- 36 F7.2 yr Epoch Mean epoch of observations 38- 47 A10 --- Comp Comparison star (c) 49- 58 A10 --- Check Check star (ck) 61- 62 I2 mmag v-c Standard deviation for the v-c V-band differential magnitude 64 I1 mmag ck-c Standard deviation for the ck-c V-band differential magnitude 66- 67 I2 --- Nights Number of nights 69- 71 F3.2 mag DeltaV Peak-to-peak amplitude of the V-band light curve 73- 79 F7.5 d Per ? Period of variability
Table 2: Mean atmospheric extinction coefficients for La Silla site, obtained over the intervals 21-28 September 1994 (1994.73) and 25 November - 05 December 1994 (1994.92) -------------------------------------------------------------------------------- Epoch U B V R I -------------------------------------------------------------------------------- mag/airmass 1994.73 .433 .210 .121 .074 .042 mag/airmass 1994.92 .439 .213 .129 .090 .049 Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Star Program star name 12- 18 F7.2 yr Epoch Mean epoch of observations 20- 24 F5.2 mag Vmag V-band maximum luminosity 26- 29 F4.2 mag U-B U-B colour index at maximum luminosity 31- 34 F4.2 mag B-V B-V colour index at maximum luminosity 36- 39 F4.2 mag V-R Cousins V-R colour index at maximum luminosity 41- 44 F4.2 mag V-I Cousins V-I colour index at maximum luminosity 46- 52 F7.5 d Per ? Period of variability 54- 70 A17 --- SpType Inferred Spectral type 72 A1 --- l_DH Limit flag on DH 73- 77 F5.1 pc DH ? Distance measured by the Hipparcos satellite 78 A1 --- u_DH Uncertainty flag on DH 80- 84 F5.1 pc dph Photometric distance inferred from the spectral classification 85 A1 --- u_dph Uncertainty flag on dph 87- 91 F5.2 mag Vmax V-band maximum luminosity ever observed
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Star Comparison or check star name 12- 16 F5.2 mag Vmag V magnitude 18- 21 F4.2 mag U-B U-B colour index (1) 22 A1 --- u_U-B Uncertainty flag on U-B (1) 24- 27 F4.2 mag B-V B-V colour index (1) 29- 32 F4.2 mag V-R Cousins V-R colour index (1) 34- 37 F4.2 mag V-I Cousins V-I colour index (1)
Note (1): Errors are of the order of 0.01 magnitudes. The symbol ":" denotes errors of the order of 0.02 magnitudes; the epochs of observation are given in Table1
Byte-by-byte Description of file: ubvri.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Star Star name 12- 23 F12.4 d HJD Heliocentric Julian Day 27- 31 F5.4 --- Phase [0/1] Phase (2) 34- 39 F6.3 mag Vmag V-band magnitude 43- 47 F5.3 mag U-B ?=9.999 U-B colour index 51- 55 F5.3 mag B-V ?=9.999 B-V colour index 59- 63 F5.3 mag V-R ?=9.999 V-Rc colour index (1) 67- 71 F5.3 mag V-I ?=9.999 V-Ic colour index (1)
Note (1): Lines for which both V-R and V-I are 9.999 refer to data obtained by the Catania automatic telescopes Note (2): Phases have been computed by using the following ephemeris: --------------------------------------- HD 7172 JDo=2449681.5 + 3.15 x E BI Cet JDo=2449577.5 + 0.520 x E BC Phe JDo=2449681.5 + 0.657 x E BG Psc JDo=2449681.5 + 7.60 x E CC Eri JDo=2449681.5 + 1.56145 x E BY Cet JDo=2449681.5 + 2.60 x E ES Eri JDo=2449681.5 + 4.7 x E YY Men JDo=2449681.5 + 9.5476 x E UX Col JDo=2449681.5 + 2.21 x E AB Dor JDo=2449681.5 + 0.51423 x E V1321 Ori JDo=2449681.5 + 5.7 x E V1355 Ori JDo=2449681.5 + 3.82 x E HY CMa JDo=2449314.93 + 4.977 x E V1358 Ori JDo=2449681.5 + 1.16 x E AU Mic JD0=2441054.0 + 4.865 x E FK Aqr JD0=2447129.529 + 4.39 x E
Acknowledgements: Giuseppe Cutispoto References: Rodono & Cutispoto, Paper I 1992A&AS...95...55R Cutispoto Paper II 1992A&AS...95..397C Cutispoto Paper III 1993A&AS..102..655C Cutispoto Paper IV 1995A&AS..111..507C Cutispoto Paper V 1996A&AS..119..281C, Cat. J/A+AS/119/281 Cutispoto & Leto Paper VI 1997A&AS..121..369C, Cat. J/A+AS/121/369 Cutispoto Paper VII 1998A&AS..127..207C, Cat. J/A+AS/127/207 Cutispoto Paper VIII 1998A&AS..131..321C, Cat. J/A+AS/131/321 Cutispoto et al., Paper IX 2001A&A...367..910C, Cat. J/A+A/367/910
(End) Patricia Bauer [CDS] 13-Mar-2003
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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