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J/MNRAS/224/61 NGC 6649 UBV photometry (Walker+ 1987)
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CCD photometry of galactic clusters containing Cepheid variables - IV. NGC 6649
Walker A.R., Laney C.D.
<Mon. Not. R. Astron. Soc. 224, 61 (1987)>
=1987MNRAS.224...61W (SIMBAD/NED BibCode)
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ADC_Keywords: Clusters, open ; Stars, variable ; Photometry, CCD
Abstract:
A colour magnitude diagram to V=20 is given for 395 stars in the
heavily reddened open cluster NGC 6649. The absorption-corrected
distance modulus is 11.00+/-0.15mag (1585+/-110pc) assuming
R(OB)=3.27+/-0.10 for NGC 6649 and based on a ZAMS with zero point
referenced to a Pleiades distance modulus of 5.56mag. The range of
reddening over the 5arcmin diameter of the cluster is
{DELTA}E(B-V)=0.3mag. NGC 6649 contains the double mode Cepheid V367
Sct, which has <M_V_>=-3.80+/-0.06 and <B_0_>-<V_0_>=0.58+/-0.02.
Objects:
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RA (2000) DE Designation(s)
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18 33.5 -10 24 NGC 6649
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3 38 395 Photometry of NGC 6649 stars
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Byte-by-byte Description of file: table3
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Bytes Format Units Label Explanations
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1- 3 I3 --- No Sequential number
5- 8 I4 arcsec DRA Offest in right ascension (1)
10- 13 I4 arcsec DDE Offest in declination (1)
15- 19 F5.2 mag Vmag V magnitude
21- 24 F4.2 mag B-V B-V colour index
26- 29 F4.2 mag U-B ? U-B colour index
31- 32 I2 --- o_Vmag Number of observation in V magnitude
34- 35 I2 --- o_Bmag Number of observation in B magnitude
37 I1 --- o_Umag Number of observation in U magnitude
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Note (1): Coordinates with respect to star No. 19, in the sense that any star
to the NE of star No. 19 has positive DRA and DDE.
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History: Prepared via OCR at CDS.
References:
Walker, Paper I. (Lynga 6), 1985MNRAS.213..889W
Walker, Paper II. (NGC 6067), 1985MNRAS.214...45W
Walker & Coulson, Paper III. (NGC 6067), 1985SAAOC...9...97W
Walker, Paper V. (Ruprecht 79), 1987MNRAS.229...31W
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(End) Marie-Jose Wagner, Patricia Bauer [CDS] 19-Jun-1997