J/AJ/146/131 UBVRI standard stars at +50° declination (Landolt, 2013)
UBVRI photometric standard stars around the sky at +50 deg declination.
Landolt A.U.
<Astron. J., 146, 131 (2013)>
=2013AJ....146..131L 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° declination. The
majority of the stars fall in the magnitude range 9<V<16, and in the
color range -0.3<(B-V)<+1.8. Those 243 stars best suited as new
broadband photometric standard stars average 12.5 measures each from
data taken on 98 different nights over a period of 17 years at the
Kitt Peak National and Lowell Observatories.
Description:
The data in this paper were obtained at the Kitt Peak National
Observatory (KPNO) and at the Lowell Observatory (LO). These data came
from three telescope setups, the KPNO 1.3m, the KPNO 0.9m, and the LO
Perkins 1.8m telescopes. The KPNO 1.3m telescope was scheduled for
this program for 78 nights in the interval 1991 October to 1995 April.
The KPNO 0.9 m data resulted from two different detectors. The first
was known as the Automated Filter Photometer2 (AFP2). The 0.9m
telescope with the AFP2 photometer was scheduled for 19 nights in the
interval 1991 October to 1993 July. The second detector arrangement
utilized an instrumental setup including a CCD and a software package
called CCDPHOT. The 0.9m telescope with CCDPHOT was scheduled for 44
nights in the interval 1992 March to 1994 September. Observations
began at the Lowell 1.8 m Perkins telescope in 2004 June. The first
interval of data taking included 2005 April to 2006 November. The
second interval of data taking included 2007 August through 2008
November. A total of 171 nights was made available for this standard
star program.
Broadband UBVRI photoelectric observations of the 349 stars are on the
Johnson-Kron-Cousins photometric system.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 128 335 UBVRI photometry of standard stars at northern
declinations
table3.dat 128 14 UBVRI photometry of standard stars at the
celestial equator
table5.dat 102 349 Accurate coordinates and proper motions for the
standard stars
table6.dat 143 87 Field centers for the standard star sequences
notes.dat 160 95 Notes
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See also:
I/322 : UCAC4 Catalogue (Zacharias+, 2012)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
II/183 : UBVRI Photometric Standards (Landolt 1992)
II/207 : Palomar-Green catalog UV-excess stellar objects (Green+ 1986)
II/118 : UBVRI standards around Celestial Equator (Landolt 1983)
II/299 : GD blue stars from Lowell proper motion survey (Giclas+ 1980)
VI/19 : UBV Photoelectric Sequences in SA 92-115 (Landolt 1973)
I/79 : Lowell Proper Motion Survey 8991 Northern Stars (Giclas 1971)
J/AJ/146/88 : UBVRI standard stars around the celestial equator (Clem+, 2013)
J/AJ/137/4186 : UBVRI standards around celestial equator (Landolt, 2009)
J/AJ/133/768 : KPNO UBVRI filter transmission characteristics (Landolt+, 2007)
J/AJ/133/2502 : UBVRI Standard Stars (Landolt, 2007)
Byte-by-byte Description of file: table[23].dat
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Bytes Format Units Label Explanations
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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- 45 F6.3 mag <Vmag> Mean V band magnitude
47- 52 F6.3 mag <B-V> Mean B-V color index
54- 59 F6.3 mag <U-B> Mean U-B color index
61- 66 F6.3 mag <V-R> Mean V-R color index
68- 73 F6.3 mag <R-I> ? Mean R-I color index
75- 80 F6.3 mag <V-I> ? 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_<Vmag> ? Mean error in <Vmag>
95-100 F6.4 mag e_<B-V> ? Mean error in <B-V>
102-107 F6.4 mag e_<U-B> ? Mean error in <U-B>
109-114 F6.4 mag e_<V-R> ? Mean error in <V-R>
116-121 F6.4 mag e_<R-I> ? Mean error in <R-I>
123-128 F6.4 mag e_<V-I> ? Mean error in <V-I>
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Note (1): Based on the UCAC4 catalog (Zacharias et al., 2013, cat. I/322).
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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- 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 1σ uncertainty in pmRA
92- 97 F6.1 mas/yr pmDE Proper motion in Declination (1)
99-102 F4.1 mas/yr e_pmDE 1σ uncertainty in pmDE
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Note (1): Most recent coordinates and proper motions.
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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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
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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.
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Standard star name
14-160 A147 --- Text Comments (object type and/or alternate name)
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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 1918AnHar.101....1P) as well as charts for
each SA (Brun & Vehrenberg, 1965ahgs.book.....B 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 1980AnTok..18...55N; Kondo
et al., 1982PASJ...34..541K 1982PASJ...34..541K, 1984AnTok..20..130K 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° declination.
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History:
From electronic version of the journal
* 10-Jun-2015: Insert into VizieR
* 20-Jul-2023: Misprint in Table 2 and Table 5 coordinates for GD 279I
corrected (01 52 08.789 +47 00 03.75 instead of 01 52 09.789 +47 00 03.75).
(End) Sylvain Guehenneux [CDS] 30-Jul-2014