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J/AJ/133/2502             UBVRI Standard Stars                   (Landolt, 2007)

UBVRI photometric standard stars around the sky at -50° declination. Landolt A.U. <Astron. J., 133, 2502-2523 (2007)> =2007AJ....133.2502L
ADC_Keywords: Stars, standard ; Photometry, UBVRI ; Fundamental catalog Keywords: catalogs - standards - stars: fundamental parameters techniques: photometric Abstract: UBVRI photoelectric observations have been made of 109 stars around the sky, centered more or less at -50° declination. The majority of the stars fall in the magnitude range 10.4<V<15.5 and in the color index range -0.33<(B-V)<+1.66. These new broadband photometric standard stars average 16.4 measurements each from data taken on 116 different nights over a period of 4yr. Similar data are tabulated for 19 stars of interest that were not observed often enough to make them well-defined standard stars. Description: The Cerro Tololo Inter-American Observatory (CTIO) 1.5m telescope with a GaAs photomultiplier was assigned on 168 nights for this program over the time interval 1998-2001. Useful data were obtained on 116 whole or partial different nights, wherein 55% of the possible observing hours were photometric. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 130 109 UBVRI Photometry of Standard Stars Near -50 Degrees Declination table4.dat 130 19 UBVRI Photometry of Isolated Stars table5.dat 97 128 Accurate Coordinates and Proper Motions for the Stars in Tables 1 and 4
See also: II/118 : UBVRI standards around Celestial Equator (Landolt 1983) II/183 : UBVRI Photometric Standards (Landolt 1992) I/277 : SPM Catalog 2.0 (Platais+ 1998) III/137 : Spectroscopically Identified Hot Subdwarf Stars (Kilkenny+ 1988) I/284 : The USNO-B1.0 Catalog (Monet+ 2003) I/289 : UCAC2 Catalogue (Zacharias+ 2004) J/A+A/461/509 : Membership and spectroscopy of IC 2391 (Platais+, 2007) Byte-by-byte Description of file: table[14].dat
Bytes Format Units Label Explanations
1- 14 A14 --- Name Star name 16- 17 I2 h RAh Hour of Right Ascension (J2000) 19- 20 I2 min RAm Minute of Right Ascension (J2000) 22- 27 F6.3 s RAs Second of Right Ascension (J2000) 29 A1 --- DE- Sign of the Declination (J2000) 30- 31 I2 deg DEd Degree of Declination (J2000) 33- 34 I2 arcmin DEm Arcminute of Declination (J2000) 36- 40 F5.2 arcsec DEs Arcsecond of Declination (J2000) 42- 47 F6.3 mag Vmag The V band magnitude 49- 54 F6.3 mag B-V The (B-V) color index 56- 61 F6.3 mag U-B The (U-B) color index 63- 68 F6.3 mag V-R The (V-R) color index 70- 75 F6.3 mag R-I The (R-I) color index 77- 82 F6.3 mag V-I The (V-I) color index 84- 85 I2 --- Nobs Number of times the star was observed 87- 88 I2 --- Night Number of nights the star was observed 90- 95 F6.4 mag e_Vmag ? Mean error in Vmag 97-102 F6.4 mag e_B-V ? Mean error in B-V 104-109 F6.4 mag e_U-B ? Mean error in U-B 111-116 F6.4 mag e_V-R ? Mean error in V-R 118-123 F6.4 mag e_R-I ? Mean error in R-I 125-130 F6.4 mag e_V-I ? Mean error in V-I
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 14 A14 --- Name Star name 16- 17 I2 h RAh Hour of Right Ascension (J2000) 19- 20 I2 min RAm Minute of Right Ascension (J2000) 22- 27 F6.3 s RAs Second of Right Ascension (J2000) 29 A1 --- DE- Sign of the Declination (J2000) 30- 31 I2 deg DEd Degree of Declination (J2000) 33- 34 I2 arcmin DEm Arcminute of Declination (J2000) 36- 40 F5.2 arcsec DEs Arcsecond of Declination (J2000) 42- 49 I8 --- UCAC2 ? Second USNO CCD Astrograph Catalog identification (Cat. I/289) 51- 67 A17 --- 2MASS 2MASS Point Source Catalog identification 69- 74 F6.1 mas/yr pmRA ? Proper motion along Right Ascension 76- 81 F6.1 mas/yr pmDE ? Proper motion along Declination 83- 84 I2 --- Ref ? Proper motion reference (1) 86- 91 A6 --- SpType Spectral type 93- 97 A5 --- r_SpType Reference(s) on SpType (1)
Note (1): Note as follows: 1 = USNO-B1.0 catalog (Monet et al. 2003, Cat. I/284); 2 = UCAC2 (Zacharias et al. 2004, Cat. I/289); 3 = Kilkenny (1987MNRAS.228..713K); 4 = Kilkenny & Muller (1989SAAOC..13...69K); 5 = Kilkenny et al. (1988, Cat. III/137); 6 = Greenstein & Sargent (1974ApJS...28..157G); 7 = Kilkenny & Hill (1975MNRAS.173..625K); 8 = Drilling (1983ApJ...270L..13D); 9 = Platais et al. (1998, Cat. I/277); 10 = Platais et al. (2007, Cat. J/A+A/461/509).
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-May-2009
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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