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J/AJ/137/4186    UBVRI standards around celestial equator  (Landolt, 2009)

UBVRI photometric standard stars around the celestial equator: updates and additions. Landolt A.U. <Astron. J., 137, 4186-4269 (2009)> =2009AJ....137.4186L
ADC_Keywords: Photometry, sequences; Photometry, UBVRI Keywords: catalogs - standards - stars: fundamental parameters - techniques: photometric Abstract: New broadband UBVRI photoelectric observations on the Johnson-Kron-Cousins photometric system have been made of 202 stars around the sky, and centered at the celestial equator. These stars constitute both an update of and additions to a previously published list of equatorial photometric standard stars. The list is capable of providing, for both celestial hemispheres, an internally consistent homogeneous broadband standard photometric system around the sky. When these new measurements are included with those previously published by Landolt (1992, Cat. II/183), the entire list of standard stars in this paper encompasses the magnitude range 8.90<V<16.30, and the color index range -0.35<(B-V)<+2.30. Description: New broadband UBVRI photoelectric observations on the Johnson-Kron-Cousins photometric system have been made of 202 stars around the sky, and centered at the celestial equator. All of the new data in this paper were taken at the Cerro Tololo Inter-American Observatory (CTIO) 1.5m telescope together with GaAs photomultipliers. A total of 224 nights were assigned over a nine year time interval. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 129 595 UBVRI photometry of standard stars table5.dat 84 595 Accurate coordinates and proper motions for the stars in table 2
See also: II/183 : UBVRI Photometric Standards (Landolt 1992) II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) I/199 : Lick Northern Proper Motion Program: NPM1 Catalog (Klemola+ 1987) I/200 : Lick Northern Proper Motion: NPM1 Ref. Galaxies (Klemola+ 1987) I/298 : LSPM-North Catalog (Lepine+ 2005) I/284 : The USNO-B1.0 Catalog (Monet+ 2003) I/289 : UCAC2 Catalogue (Zacharias+ 2004) I/294 : The UCAC2 Bright Star Supplement (Urban+, 2006) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Name Star name 13- 14 I2 h RAh Hour of Right Ascension (J2000) 16- 17 I2 min RAm Minute of Right Ascension (J2000) 19- 24 F6.3 s RAs Second of Right Ascension (J2000) 26 A1 --- DE- Sign of the Declination (J2000) 27- 28 I2 deg DEd Degree of Declination (J2000) 30- 31 I2 arcmin DEm Arcminute of Declination (J2000) 33- 37 F5.2 arcsec DEs Arcsecond of Declination (J2000) 39- 44 F6.3 mag Vmag The Johnson V band magnitude 46- 51 F6.3 mag B-V The Johnson (B-V) color index 53- 58 F6.3 mag U-B The Johnson (U-B) color index 60- 65 F6.3 mag V-R The Johnson-Cousins (V-R) color index 67- 72 F6.3 mag R-I The Cousins (R-I) color index 74- 79 F6.3 mag V-I The Johnson-Cousins (V-I) color index 81- 83 I3 --- Nobs Number of times star was observed 85- 87 I3 --- Nnig Number of nights star was observed 89- 94 F6.4 mag e_Vmag ? Mean error of the mean of Vmag 96-101 F6.4 mag e_B-V ? Mean error of the mean of B-V 103-108 F6.4 mag e_U-B ? Mean error of the mean of U-B 110-115 F6.4 mag e_V-R ? Mean error of the mean of V-R 117-122 F6.4 mag e_R-I ? Mean error of the mean of R-I 124-129 F6.4 mag e_V-I ? Mean error of the mean of V-I
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Name Star Name 13- 14 I2 h RAh Hour of Right Ascension (J2000) 16- 17 I2 min RAm Minute of Right Ascension (J2000) 19- 24 F6.3 s RAs Second of Right Ascension (J2000) 26 A1 --- DE- Sign of the Declination (J2000) 27- 28 I2 deg DEd Degree of Declination (J2000) 30- 31 I2 arcmin DEm Arcminute of Declination (J2000) 33- 37 F5.2 arcsec DEs Arcsecond of Declination (J2000) 39- 46 A8 --- UCAC2 The UCAC2 identifier, Cat. I/289 48- 64 A17 --- 2MASS-PSC The 2MASS-PSC identifier, Cat. II/246 66- 73 F8.2 mas/yr pmRA Proper motion in Right Ascension 75- 82 F8.2 mas/yr pmDE Proper motion in Declination 84 I1 --- Ref Proper motion reference (1)
Note (1): Reference code as follows: 1 = Zacharias et al. (2004, Cat. I/289) [UCAC2] 2 = Monet et al. (2003, Cat. I/284) [USNO-B1.0 catalog] 3 = Klemola et al. (1987, Cat. I/199, I/200) 4 = Lepine & Shara (2005, Cat. I/298) 5 = Urban et al. (2004, Cat. I/294)
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 31-Mar-2011
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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