II/123A UBV Photometry of Faint Stars (V>14.5) in M67 (Frolov+ 1986)
UBV Photometry of Faint Stars (V>14.5) in the Open Cluster M67
Frolov V.N., Ananyevskaya J.K.
<Astron. Tsirk. No. 1432, (1986)>
=1986ATsir1432....5F 1986ATsir1432....5F
ADC_Keywords: Stars, faint; Photometry, UBV ; Photometry, photographic ;
Clusters, open
Description:
This catalog is the result of a program of photographic photometry.
Four plates each were taken of M67 in U, B, and V, and were measured
and reduced using the standards of Johnson and Sandage (1955) and
Eggen and Sandage (1964). The catalog lists identification, V, B-V,
U-B, proper motion, and membership probability for 1,053 stars.
Introduction:
The UBV Photometry of Faint Stars (V>14.5) in the Open Cluster M67
(NGC 2682) (UBV-M67; Frolov and Ananyevskaya 1986) lists UBV
photometry of faint stars obtained as part of an investigation of M67.
It complements the work of Frolov (1984), which dealt with the
brighter stars (V '<' 14.5 mag.)
Because most of these objects had no previous photometry, Frolov and
Ananyevskaya have obtained UBV photometry for all catalog stars. Four
plates were taken in each color using the Schmidt telescope of the
Radio Astrophysical Observatory of the Latvian SSR, which were then
measured and calibrated using the standards of Johnson and Sandage
(1955) and Eggen and Sandage (1964). Frolov and Ananyevskaya (1986)
note the following:
As there was a lack of the faintest standards we had to add
photoelectric UBV magnitudes of five stars determined only by one
observation. The mean errors are 0.03, 0.04, and 0.03 mag. for U,
B, and V magnitudes, respectively.
See Frolov (1984) for further details of the data reduction. Of the
1,053 stars included in this catalog, 172 were determined to be
members of M67 on the basis of proper motion and photometry.
The catalog is in a single file which lists identification, V, B-V,
U-B, relative proper motion, and probability of membership for each
of the stars investigated.
Objects:
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RA (2000) DE Designation(s)
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08 50.4 +11 49 M 67 = NGC 2682
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
data.dat 58 1053 The catalog of faint stars in M67
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See also:
V/52 : Photometry and Proper Motions of stars in M67 (Frolov+ 1986)
J/A+AS/100/243 : Proper motions in M 67 (Zhao+ 1993)
J/AJ/106/181 : CCD photometry of open cluster M67 (Montgomery+ 1993)
J/AJ/112/628 : Deep Wide-Field Spectrophotometry of M67 (Fan+ 1996)
J/BaltA/7/369 : M67 CCD photometry (Boyle+, 1998)
Byte-by-byte Description of file: data.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- ID *UBV-M67 number
6- 7 A2 --- flag *Membership flag
8- 12 I5 --- Sand *Sanders number
15- 19 F5.2 mag Vmag V magnitude
23- 26 F4.2 mag B-V B-V color
29- 33 F5.2 mag U-B ? U-B color
34 A1 --- u_Vmag Uncertainty flag (:) on the photometry
37- 43 F7.4 arcsec/a pmX *Relative proper motion X
46- 52 F7.4 arcsec/a pmY *Relative proper motion Y
56- 57 I2 % prob *Membership probability (percent)
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Note on ID:
Number in this catalog (increasing, but not consecutive).
Note on flag:
Two-character code indicating whether this star is a member of M67 as
determined by Frolov and Ananyevskaya (1986):
* = Cluster member
** = Possible cluster member (probability < 50%)
blank = Not a cluster member
Note on Sand:
Number of the star in the catalog of Sanders (1977A&AS...27...89S 1977A&AS...27...89S).
Note on pmX, pmY:
Relative proper motions of the star in x as determined by Sanders
(1977A&AS...27...89S 1977A&AS...27...89S),
Note on prob:
Percentage probability that this star is a member of M67 as determined
by Sanders (1977A&AS...27...89S 1977A&AS...27...89S).
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Remarks and Modifications
The UBV Photometry of Faint Stars (V>14.5) in the Open Cluster M67
(NGC 2682) (UBV-M67) was received by the Astronomical Data Center
(ADC), NASA Goddard Space Flight Center, from the Centre de Donnees
Astronomiques, Strasbourg (CDS), in December 1986.
The original tape consisted of two text files: the first file
contained a description of the catalog file and has been incorporated
into this document; the second file contained the catalog data. No
changes were made to the data file.
A FORTRAN program was run to check the validity of each field
according to its data type and value.
Acknowlegement:
The processing of this catalog for the archive and the preparation of
the Script document on which this document is based were carried out
by Wayne H. Warren Jr.
References:
Eggen, O. J. and Sandage, A. R. 1964ApJ...140..130E 1964ApJ...140..130E
Frolov, V. N. 1984, Isv. Pulkovo, 202, 105 (1984IzPul.202..105F 1984IzPul.202..105F)
Frolov, V. N. and Ananyevskaya, J. K. 1986, unpublished documentation
received with the catalog from the CDS.
Johnson, H. L. and Sandage, A. R. 1955ApJ...121..616J 1955ApJ...121..616J
Sanders, W. L. 1977A&AS...27...89S 1977A&AS...27...89S
(End) Nancy Grace Roman [ADC/SSDOO] Feb-16-1996