J/AJ/108/585 UBVI photometry of NGC 6791 (Montgomery+, 1994)
The reddening and metallicity of NGC 6791.
Montgomery K.A., Janes K.A., Phelps R.L.
<Astron. J., 108, 585-593 (1994)>
=1994AJ....108..585M 1994AJ....108..585M
ADC_Keywords: Clusters, open ; Photometry, UBVRI ; Photometry, CCD
Abstract:
We have investigated the reddening and metallicity of NGC 6791 using
photoelectric and Charge Coupled Devices (CCD) photometry at the KPNO
0.9m telescope. The reddenings to 31 photoelectrically measured stars
in the direction of the cluster were determined individually yielding
a mean E(B-V)=0.10±0.02. Broadband UBVI CCD images were taken with a
512x512 CCD and included deep frames on the center, plus a 3x3 mosaic
of the cluster.
Description:
CCD observations were obtained at the KPNO 0.9m telescope using the
Tektronix 512x512 CCD camera on 1989 March 28 (UT), and three nights
spanning September 27-29 (UT).
Objects:
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RA (2000) DE Designation(s)
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19 20 53.0 +37 46 18 NGC 6791 = C 1919+377
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 49 31 Photoelectronic photometry
table.dat 72 8061 UBVI CCD photometry of NGC 6791
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See also:
J/A+AS/114/1 : CCD UBVI photometry of NGC 6791 (Kaluzny+, 1995)
J/AJ/123/3460 : Low-amplitude variables in NGC 6791 (Mochejska+, 2002)
J/MNRAS/243/492 : BV Photometry of NGC 6791. (Kaluzny 1990)
J/PASP/115/413 : A star catalog for the open cluster NGC 6791 (Stetson+ 2003)
J/AJ/129/656 : Infrared photometry of NGC 6791 (Carney+, 2005)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Name Source name (1)
8- 14 F7.2 pix Xpos ? X coordinate (G1)
16- 22 F7.2 pix Ypos ? Y coordinate (G1)
24- 29 F6.3 mag Vmag V band magnitude
31- 35 F5.3 mag B-V (B-V) color index
37- 42 F6.3 mag U-B (U-B) color index
44- 49 F6.3 mag E(B-V) (B-V) color excess
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Note (1): Star numbers preceded with MJP are from this study. The 14 remaining
stars are from Harris & Canterna (1981AJ.....86.1332H 1981AJ.....86.1332H).
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Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- MJP Source name
6- 12 F7.2 pix Xpos X coordinate (G1)
14- 20 F7.2 pix Ypos Y coordinate (G1)
22- 27 F6.3 mag Vmag V band magnitude
29- 34 F6.3 mag B-V (B-V) color index
36- 41 F6.3 mag U-B ?=99.999 (U-B) color index
43- 48 F6.3 mag V-I ?=99.999 (V-I) color index
50- 54 F5.3 mag e_Vmag Error in Vmag
56- 60 F5.3 mag e_B-V Error in B-V
62- 66 F5.3 mag e_U-B Error in U-B
68- 72 F5.3 mag e_V-I Error in V-I
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Global Notes:
Note (G1): X and Y coordinates correspond to the map in Fig. 1.
North is to the right and East is up. The scale is 0.77"/pixel.
NGC 6791 s at B1950=19:19.0+37:45, G070.01+10.96.
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History:
Copied at WEBDA, http://www.univie.ac.at/webda/archive_ngc.html
(End) Marianne Brouty [CDS] 14-Oct-2005