J/AJ/146/131 UBVRI standard stars at +50{deg} declination (Landolt, 2013) ================================================================================ UBVRI photometric standard stars around the sky at +50 deg declination. Landolt A.U. =2013AJ....146..131L ================================================================================ ADC_Keywords: Stars, standard ; Photometry, UBVRI ; Proper motions Keywords: catalogs - standards - stars: fundamental parameters - techniques: photometric Abstract: UBVRI photoelectric observations have been made of 335 stars around the sky, and centered approximately at +50{deg} declination. The majority of the stars fall in the magnitude range 9 Mean V band magnitude 47- 52 F6.3 mag Mean B-V color index 54- 59 F6.3 mag Mean U-B color index 61- 66 F6.3 mag Mean V-R color index 68- 73 F6.3 mag ? Mean R-I color index 75- 80 F6.3 mag ? Mean V-I color index 82- 83 I2 --- No Number of times that each star was observed 85- 86 I2 --- Nn Number of nights during which a star was observed 88- 93 F6.4 mag e_ ? Mean error in 95-100 F6.4 mag e_ ? Mean error in 102-107 F6.4 mag e_ ? Mean error in 109-114 F6.4 mag e_ ? Mean error in 116-121 F6.4 mag e_ ? Mean error in 123-128 F6.4 mag e_ ? Mean error in -------------------------------------------------------------------------------- Note (1): Based on the UCAC4 catalog (Zacharias et al., 2013, cat. I/322). -------------------------------------------------------------------------------- Byte-by-byte Description of file: table5.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 12 A12 --- Name Standard star name (G1) 14- 15 I2 h RAh Hour of Right Ascension (J2000) (1) 17- 18 I2 min RAm Minute of Right Ascension (J2000) (1) 20- 25 F6.3 s RAs Second of Right Ascension (J2000) (1) 27 A1 --- DE- Sign of the Declination (J2000) (1) 28- 29 I2 deg DEd Degree of Declination (J2000) (1) 31- 32 I2 arcmin DEm Arcminute of Declination (J2000) (1) 34- 38 F5.2 arcsec DEs Arcsecond of Declination (J2000) (1) 40- 49 A10 --- UCAC4a Identifier from UCAC4 catalog (cat. I/322) 51- 60 A10 --- UCAC4b Second UCAC4 identifier for UCAC4 641-047816 62- 78 A17 --- 2MASS 2MASS name (cat. II/246) (JHHMMSSss+DDMMSSs) 80- 85 F6.1 mas/yr pmRA Proper motion in Right Ascension (1) 87- 90 F4.1 mas/yr e_pmRA 1{sigma} uncertainty in pmRA 92- 97 F6.1 mas/yr pmDE Proper motion in Declination (1) 99-102 F4.1 mas/yr e_pmDE 1{sigma} uncertainty in pmDE -------------------------------------------------------------------------------- Note (1): Most recent coordinates and proper motions. -------------------------------------------------------------------------------- Byte-by-byte Description of file: table6.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 11 A11 --- Field Field name (1) 13- 14 I2 h RAh Hour of Right Ascension (J2000) (2) 16- 17 I2 min RAm Minute of Right Ascension (J2000) (2) 19- 23 F5.2 s RAs Second of Right Ascension (J2000) (2) 25 A1 --- DE- Sign of the Declination (J2000) (2) 26- 27 I2 deg DEd Degree of Declination (J2000) (2) 29- 30 I2 arcmin DEm Arcminute of Declination (J2000) (2) 32- 35 F4.1 arcsec DEs Arcsecond of Declination (J2000) (2) 37- 41 A5 arcmin FOV Field of view (field size) 43- 44 I2 --- Ns Number of stars in each field 46- 50 F5.2 mag Vmin Lower range in V magnitude (3) 52- 56 F5.2 mag Vmax ? Upper range in V magnitude (3) 58- 62 F5.2 mag B-Vmin Lower range in (B-V) color index (3) 64- 68 F5.2 mag B-Vmax ? Upper range in (B-V) color index (3) 70- 74 F5.2 mag U-Bmin Lower range in (U-B) color index (3) 76- 80 F5.2 mag U-Bmax ? Upper range in (U-B) color index (3) 82-143 A62 --- Standard Which stars within a field are recommended as standard stars -------------------------------------------------------------------------------- Note (1): The stars in the Kapteyn plan of selected areas (SAs) have been subdivided into smaller fields. The name of the star field, or sequence, usually is derived from the most prominent star in the field, e.g., the Giclas (GD) star or the Palomar-Green (PG) star. In the case of the SAs, first the central coordinates for the entire SA are given. Then these large fields are subdivided into smaller subfields, SA20 SF1, for example. The nomenclature SF means SubField. Note (2): Coordinates for the center of a sequence field or subfield. Note (3): Within a field. -------------------------------------------------------------------------------- Byte-by-byte Description of file: notes.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 12 A12 --- Name Standard star name 14-160 A147 --- Text Comments (object type and/or alternate name) -------------------------------------------------------------------------------- Global notes: Note (G1): The Kapteyn plan of selected areas (SAs), described by Blaauw & Elvius (1965gast.conf..589B), includes star lists that provide magnitude estimates (Pickering & Kapteyn, 1918AnHar.101....1P) as well as charts for each SA (Brun & Vehrenberg, 1965ahgs.book.....B). The GD stars were blue stars of small motion originally identified by Giclas in his proper motion surveys completed at the Lowell Observatory. A summary listing of the GD stars was published by Giclas et al. (1971, cat. I/79). A list of white dwarf suspects compiled by Giclas and colleagues in Lowell Obs. Bulletins (Giclas et al., 1980, cat. II/299). The Palomar-Green (PG) star list was the result of a search for ultraviolet excess stellar objects (Green et al., 1986, cat. II/207). The KUV stars also were the product of a search for ultraviolet excess objects (Noguchi et al., 1980AnTok..18...55N; Kondo et al., 1982PASJ...34..541K, 1984AnTok..20..130K). Each of these sources provided candidate standard stars in a band of the celestial sphere around the sky and centered approximately at +50{deg} declination. -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Sylvain Guehenneux [CDS] 30-Jul-2014