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J/A+A/367/910   UBV(RI)c photometry of active stars. IX      (Cutispoto+, 2001)

Long-term monitoring of active stars. IX. Photometry collected in 1993. Cutispoto G., Messina S., Rodono M. <Astron. Astrophys. 367, 910 (2001)> =2001A&A...367..910C
ADC_Keywords: Stars, variable ; Photometry, UBVRI ; Photometry, Cousins ; Stars, flare Keywords: stars: activity - stars: late-type - stars: pre-main sequence - stars: variables - X-ray: stars Abstract: As a part of an extensive program focused on the global properties and evolution of active stars, high-precision UBV(RI)c and UBV photometry of 31 selected stars is presented. The UBV(RI)c observations were collected at the European Southern Observatory over the 31 December 1992-18 January 1993 and the 20 November-3 December 1993 intervals. Additional UBV photometry obtained by the ``Phoenix" and by the Catania Astrophysical Observatory Automatic Photoelectric Telescopes from 1990 to 1993 is also presented for some of the program stars. 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 the inferred photometric parallaxes are compared, whenever possible, with the values measured by the Hipparcos satellite (Cat. I/239). 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 rotation, solar-like cycles and the correlation between inhomogeneities at different atmospheric levels. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 30 44 Star positions (from Simbad) ubv.dat 42 329 UBV data obtained by the Catania and Phoenix automatic telescopes ubvri.dat 58 388 UBV(RI)c data obtained at La Silla observatory table1.dat 80 47 V differential magnitudes of program stars table3.dat 88 46 UBVRI photometry, spectral classification and distance of program stars table4.dat 39 65 V magnitude and colours for the c and ck stars obtained at ESO table5.dat 92 13 Revised spectral classification, based on the latest version of the ASC method, for some active stars previously observed by our group tables.tex 80 370 LaTeX version of tables 1-5
See also: J/A+AS/115/41 : UBV(RI)c photometry of cool stars (Cutispoto+, 1996) J/A+A/364/205 : UBVy photometry of cool stars (Cutispoto+, 2000) J/A+AS/119/281 : UBV(RI)c photometry of active stars. V (Cutispoto, 1996) J/A+AS/121/369 : UBV(RI)c photometry 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/400/659 : UBV(RI)c photometry of active stars. X (Cutispoto+, 2003) Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Star Program star name 11- 12 I2 h RAh Right ascension (J2000.0) 14- 15 I2 min RAm Right ascension (J2000.0) 17- 20 F4.1 s RAs Right ascension (J2000.0) 22 A1 --- DE- Declination sign (J2000.0) 23- 24 I2 deg DEd Declination (J2000.0) 26- 27 I2 arcmin DEm Declination (J2000.0) 29- 30 I2 arcsec DEs Declination (J2000.0)
Byte-by-byte Description of file: ubv.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Star Star name 11- 22 F12.4 d HJD Heliocentric Julian Day 24- 28 F5.3 mag Vmag V-band magnitude 30- 35 F6.3 mag B-V ?=9.000 B-V colour index 37- 42 F6.3 mag U-B ?=9.000 U-B colour index
Byte-by-byte Description of file: ubvri.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Star Star name 11- 22 F12.4 d HJD Heliocentric Julian Day 24- 29 F6.3 mag Vmag V-band magnitude 31- 36 F6.3 mag U-B ?=9.999 U-B colour index 38- 43 F6.3 mag B-V ?=9.999 B-V colour index 45- 50 F6.3 mag V-R ?=9.999 V-Rc colour index 52- 57 F6.3 mag V-I ?=9.999 V-Ic colour index
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Star Program star name 11- 23 A13 --- Oname Other name of the star 26- 32 F7.2 yr Epoch Mean epoch of observation 35- 44 A10 --- Comp Comparison star 46- 55 A10 --- Check Check star 57- 58 I2 mmag v-c Standard deviation for the v-c V-band differential magnitude 60- 61 I2 mmag ck-c Standard deviation for the ck-c V-band differential magnitude 63- 64 I2 --- Nights Number of nights 66- 69 F4.3 mag DeltaV ? Peak-to-peak amplitude of the V-band light curve 70- 78 F9.6 yr Per ? Period of variability 80 A1 --- u_Per [?] ?: unknown value of Per
Table 2: Mean atmospheric extinction coefficients for La Silla site, obtained over the intervals 31 December 1992 - 18 January 1993 (1993.02) and 20 November - 03 December 1993 (1993.91) ------------------------------------------------------------------------------ Epoch U B V R I mag/airmass 1993.02 .522 .294 .203 .163 .117 mag/airmass 1993.91 .429 .210 .128 .088 .058 Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Star Program star name 11- 17 F7.2 yr Epoch Mean epoch of observation 19- 23 F5.2 mag Vmag V magnitude at 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 ? V-Rc colour index at maximum luminosity 41- 44 F4.2 mag V-I ? V-Ic colour index at maximum luminosity 46- 66 A21 --- SpType Inferred spectral classification 68 A1 --- l_DH Limit flag on DH 69- 73 F5.1 pc DH ? Distance measured by Hipparcos (I/239) 74 A1 --- u_DH Uncertainty flag on DH 76 A1 --- l_dph Limit flag on dph 77- 82 F6.2 pc dph ? Photometric distance inferred from the adopted spectral classification 83 A1 --- u_dph Uncertainty flag on dph 85- 88 F4.2 mag Vmax ? V-band maximum luminosity ever observed
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Comparison or check star name 12- 16 F5.2 mag Vmag V magnitude (1) 19- 22 F4.2 mag U-B U-B colour index (1) 23 A1 --- u_U-B [:] : for errors of the order of 0.02 mag 25- 28 F4.2 mag B-V B-V colour index (1) 30- 33 F4.2 mag B-R B-Rc colour index (1) 35- 38 F4.2 mag V-I V-Ic colour index (1)
Note (1): Errors are of the order of 0.01 magnitudes. The epochs of observation are given in Table1
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Star Program star name 11- 19 A9 --- VName Variable name of program star 21- 38 A18 --- SpType Revised classification 40- 54 A15 --- SpType2 Previous classification 57- 75 A19 --- r_SpType2 Bibcode of SpType2 reference (Cutispoto et al.) 77- 81 F5.1 pc DHl Lower limit of Hipparcos (I/239) distance interval 83- 88 F6.1 pc DHu Upper limit of Hipparcos (I/239) distance interval 90- 92 I3 pc dph Photometric distance inferred from adopted spectral classification
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 X 2003A&A...400..659C, Cat. J/A+A/400/659
(End) Patricia Bauer [CDS] 19-Mar-2001
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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