J/A+AS/146/169 Secondary UBVRI-CCD standard stars (Galadi+, 2000)
Secondary UBVRI-CCD standard stars in the neighbourhood of
Landolt standard stars
Galadi-Enriquez D., Trullols E., Jordi C.
<Astron. Astrophys. Suppl. Ser. 146, 169 (2000)>
=2000A&AS..146..169G 2000A&AS..146..169G (SIMBAD/NED BibCode)
ADC_Keywords: Photometry, UBVRI
Keywords: methods: observational - techniques: photometric - stars: general
Description:
Table 4 contains astrometric (alpha, delta) and photometric (UBVRI)
data for 681 secondary standard stars in the neighbourhood of several
Landolt standard stars. Several columns contain information related to
the origin and quality of the photometry. Cross-identifications with
USNO-A2.0 catalogue (I/252) are given. Further cross-identifications
are given in notes.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 124 681 UBVRI-CCD secondary standard stars
notes.dat 56 21 Notes to Table 4
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See also:
I/252 : The USNO-A2.0 Catalogue (Monet+ 1998)
II/183 : UBVRI Photometric Standards (Landolt, 1992)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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2- 3 I2 --- Field Field number
5- 7 I3 --- Star Star number inside its field
9- 10 I2 h RAh Right ascension (J2000)
12- 13 I2 min RAm Right ascension (J2000)
15- 19 F5.2 s RAs Right ascension (J2000)
23 A1 --- DE- Declination sign (J2000)
24- 25 I2 deg DEd Declination (J2000)
27- 28 I2 arcmin DEm Declination (J2000)
30- 33 F4.1 arcsec DEs Declination (J2000)
36- 41 F6.3 mag Vmag Magnitude in V band
43- 47 F5.3 mag e_Vmag Error of V magnitude
49- 54 F6.3 mag B-V ?=99.999 Colour index B-V
56- 60 F5.3 mag e_B-V ?=9.999 Error of B-V colour index
62- 67 F6.3 mag U-B ?=99.999 Colour index U-B
69- 73 F5.3 mag e_U-B ?=9.999 Error of U-B colour index
75- 80 F6.3 mag V-R Colour index V-R
82- 86 F5.3 mag e_V-R Error of V-R colour index
88- 93 F6.3 mag V-I Colour index V-I
95- 99 F5.3 mag e_V-I Error of V-R colour index
101-102 I2 --- o_Star Observational runs with useful data
104-105 I2 --- o_Vmag Number of useful measurements in V
107 A1 --- --- [U] for USNO-A2.0
108-120 A13 --- USNO-A2.0 ? Cross-identification with USNO-A2.0 (I/252)
122-124 A3 --- Notes ? Callings to table notes.dat
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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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2- 2 A1 --- Calling [ *a-t] Calling from Table 4
4- 6 I3 --- Field *?=0 Field number
8- 10 I3 --- Star *?=0 Star number inside its field
13- 56 A44 --- Text *Cross-identifications and comments
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Note on Field, Star: The null value (0) indicates that this comment holds
not for just one star, but for any star labelled with the same calling
Note on Text: the cross-identification refer to
AC = AC2000 (Cat. I/247)
HIP and TYC = Hipparcos & Tycho Catalogues (Cat. I/239)
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Acknowledgements: David Galadi
(End) David Galadi-Enriquez [Centro de Astrobiologia] 18-Jul-2000