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UBVRI_ST: UBVRI Photometric Standard Stars

Contents

Catalogue name: 	UBVRI_ST
Records:  		223
Version:		Celestial Equator
Spectral Band: 		Uband,Vband,OPT
Kind of Object: 	Star
Mode: 			Photometry
PreView:
Coordinates: 		J2000

Reference

Description

The photometric results here represent the first part of an effort to provide UBVRI photoelectric photometric standard stars in the magnitude range 7 < V < 17 over as broad a range in color as possible. The stars that were observed are located in a band centered on the celestial equator, and therefore are easily accessible to telescopes of all sizes in both hemispheres.The observational data were tied into the UBV standard stars of Landolt (1973) and the RI standards of Cousins (1976).

Fields


Name	Meaning

ra_ori	1985 R.A.
dec_ori	1985 Declination
ra	2000 R.A.
dec	2000 Declination
lii	Galactic Longitude
bii	Galactic Latitude 
name	Star identifications taken from:

	Henry Draper Catalogue
	Bonner Durchmusterung Catalogue
	Feige lists of blue stars
	Giclas stars in various Lowell Obs. Bullettins
	Harvard Annals

vmag	V magnitude
bmv	B-V index
umb	U-B index
vmr	V-R index
rmi	R-I index
vmi	V-I index
e_v	Mean error of the mean V magnitude
e_bmv	Mean error of the mean B-V index
e_umb	Mean error of the mean U-B index
e_vmr	Mean error of the mean V-R index
e_rmi	Mean error of the mean R-I index
e_vmi	Mean error of the mean V-I index
     
	where this kind of error is=defined by    
	[  (xi- x) =n(n - 1)]
     
n	Number of times that each star was observed
m	Number of different nigths that each star was observed
notes	The numbers refer to footnotes (See: note) 
note	Footnotes 
comment	Other informations (see: Abbreviations)

Abbreviations

The literature has been searched for additional information for the BD and HD stars in this catalogue. Similar information for the Selected Area stars can be found in Appendices I and II of Landolt 1973 (Astron. J. 78, 959). MK spectral types for the Selected Area stars may be found in Drilling and Landolt 1979 (Astron. J. 84, 783). Abbreviations used in the comment field include: 
     abs. pi	absolute trigonometric parallax 
     BD		Bonner Durchmusterung 
     CC		Cincinnati Obs. Publ. No. 18
     comp.	companion
     dbl.	double
     em.	emission
     F		Feige
     G		Giclas et al. numbers in Lowell Obs. Bulletin proper-motion 
		lists
     GC		Boss General Catalogue of 33,342 Stars for the Epoch 1950
     GCRV	General Catalogue of Stellar Radial Velocities 
     HD		The Henry Draper Catalogue 
     LFT	Luyten (1955) 
     LTT	Luyten (1957)
     M		absolute magnitude
     MWC	Mt. Wilson Catalogue of Be and Ae Stars 
		(Merrill and Burwell 1933)
     PC		Jenkins Parallax Catalogue(s) (Yale)
     pe. ptm.	photoelectric photometry
     r		distance
     rel. pi	relative trigonometric parallax
     r.v.	radial velocity
     SA		Selected Areas
     sp. bin.	spectroscopic binary
     sp. cl.	spectroscopic classification
     sp. pi	spectroscopic parallax
     T		tangential velocity
     Y		Barney 1949 (Trans. Astron. Obs. Yale Univ. 20)
     mu		proper motion
     pi		trigonometric parallax