J/MNRAS/243/492 BV Photometry of NGC 6791 (Kaluzny, 1990)
CCD BV photometry of the old open cluster NGC 6791.
Kaluzny J.
<Mon. Not. R. Astron. Soc., 243, 492-497 (1990)>
=1990MNRAS.243..492K 1990MNRAS.243..492K
ADC_Keywords: Clusters, open ; Photometry, CCD
Abstract:
CCD BV photometry to V=20.5 of stars in the old open cluster NGC
6791 is presented. Comparison with the theoretical isochrones of
VandenBerg gives a cluster age in the range of 10 to 12.5Gyr, and an
apparent distance modulus of 13.45mag, adopting a solar metallicity.
This cluster is only marginally younger than Palomar 12, which is the
youngest globular cluster known. A search for short-period variables
in the cluster field led to the discovery of only one low-amplitude
variable, probably belonging to the FK Com-type stars. A very blue
star was detected which may be an extremely young white dwarf formed
in the cluster.
Description:
The CCD observations were made during 4 nights 1987-06-14 to 1987-06-17
at the Kitt Peak 0.9m telescope; the scale is around 0.86arcsec/pix.
Objects:
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RA (2000) DE Designation(s)
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19 20 53 +37 46 18 NGC 6791 = Cl Berkeley 46
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 61 1752 BV photometry of NGC 6791
ngc6791.dat 68 10389 Cross-identifications
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See also:
J/PASP/115/413 : A star catalog for the open cluster NGC 6791 (Stetson+, 2003)
J/AJ/123/3460 : Low-amplitude variables in NGC 6791 (Mochejska+, 2002)
J/A+AS/114/1 : CCD UBVI photometry of NGC 6791 (Kaluzny+, 1995)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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3- 7 I5 --- Seq [1/1759] Identification number
11- 16 F6.2 pix Xpos X position (1)
20- 25 F6.2 pix Ypos Y position (1)
29- 34 F6.3 mag Vmag V magnitude
39- 43 F5.3 mag e_Vmag rms uncertainty on Vmag
47- 52 F6.3 mag B-V B-V colour index
57- 61 F5.3 mag e_B-V rms uncertainty on B-V
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Note (1): North is at the top and EAst is to the left; 100pix=86"
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Byte-by-byte Description of file: ngc6791.dat
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Bytes Format Units Label Explanations
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2- 6 I5 --- Seq [1/16258] Identification number, this paper
9- 13 A5 --- ID1 Kinman (1965ApJ...142..655K 1965ApJ...142..655K) designation
14 A1 --- u_ID1 [?] Uncertainty flag on ID1
17- 18 A2 --- ID2 Harris & Canterna (1981AJ.....86.1332H 1981AJ.....86.1332H) designation
<Cl* NGC 6791 HC SN> in Simbad
21- 23 I3 --- ID3 [1/146]?=- Anthony-Twarog & Twarog
(1985ApJ...291..595A 1985ApJ...291..595A),
<Cl* NGC 6791 ATT NNN> in Simbad
26- 29 I4 --- ID4 [1/1759]?=- Kaluzny (1990MNRAS.243..492K 1990MNRAS.243..492K)
32- 34 I3 --- ID5 [0/990]?=- Kaluzny & Udalski (1992AcA....42...29K 1992AcA....42...29K),
<Cl* NGC 6791 KU NNNN> in Simbad
37- 39 A3 --- ID6 Garnavich et al. (1994AJ....107.1097G 1994AJ....107.1097G),
<Cl* NGC 6791 GVZH RNN> in Simbad
42- 45 I4 --- ID7 [1/8062]?=- Montgomery et al. (1994AJ....108..585M 1994AJ....108..585M),
<Cl* NGC 6791 MJPT NNNN> in Simbad
48- 50 A3 --- ID8 Kaluzny & Rucinski (1995A&AS..114....1K 1995A&AS..114....1K),
<Cl* NGC 6791 KU BNN> in Simbad
53- 56 I4 --- ID9 [1/3927]?=- Kaluzny & Rucinski (1995A&AS..114....1K 1995A&AS..114....1K)
<Cl* NGC 6791 KR 1-NNNN> in Simbad
59- 63 I5 --- ID10 [1206/15224]?=- Kaluzny & Rucinski
(1995A&AS..114....1K 1995A&AS..114....1K),
<Cl* NGC 6791 KR 2-NNNN> in Simbad
66- 68 A3 --- ID11 Mochejska et al. (2002AJ....123.3460M 2002AJ....123.3460M),
<Cl* NGC 6791 KR VNN> in Simbad
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History:
Prepared by Peter Stetson from the microfiche of Table 2
(End) Patricia Vannier [CDS] 09-Dec-2005