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 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:
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FileName Lrecl Records Explanations
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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
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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
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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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)
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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 1987MNRAS.228..713K);
4 = Kilkenny & Muller (1989SAAOC..13...69K 1989SAAOC..13...69K);
5 = Kilkenny et al. (1988, Cat. III/137);
6 = Greenstein & Sargent (1974ApJS...28..157G 1974ApJS...28..157G);
7 = Kilkenny & Hill (1975MNRAS.173..625K 1975MNRAS.173..625K);
8 = Drilling (1983ApJ...270L..13D 1983ApJ...270L..13D);
9 = Platais et al. (1998, Cat. I/277);
10 = Platais et al. (2007, Cat. J/A+A/461/509).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-May-2009