J/MNRAS/224/61 NGC 6649 UBV photometry (Walker+ 1987)
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 1987MNRAS.224...61W
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 <MV≥-3.80±0.06 and <B0>-<V0≥0.58±0.02.
Objects:
----------------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------------
18 33.5 -10 24 NGC 6649
----------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 38 395 Photometry of NGC 6649 stars
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- No Sequential number
5- 8 I4 arcsec oRA Offest in right ascension (1)
10- 13 I4 arcsec oDE 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
--------------------------------------------------------------------------------
Note (1): Coordinates with respect to star #19, in the sense that
any star to the NE of star No. 19 has positive oRA and oDE.
Star #19 is GSC 5695-514 with J2000 position 18:33:24.91-10:24:24.8
--------------------------------------------------------------------------------
History: Prepared via OCR at CDS.
References:
Walker, Paper I. (Lynga 6), 1985MNRAS.213..889W 1985MNRAS.213..889W
Walker, Paper II. (NGC 6067), 1985MNRAS.214...45W 1985MNRAS.214...45W
Walker & Coulson, Paper III. (NGC 6067), 1985SAAOC...9...97W 1985SAAOC...9...97W
Walker, Paper V. (Ruprecht 79), 1987MNRAS.229...31W 1987MNRAS.229...31W
(End) Marie-Jose Wagner, Patricia Bauer [CDS] 19-Jun-1997