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J/A+AS/114/1 CCD UBVI photometry of NGC 6791 (Kaluzny+, 1995)
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CCD photometry of distant open clusters: II NGC 6791
Kaluzny J., Rucinski S.M.
<Astron. Astrophys. Suppl. Ser. 114, 1 (1995)>
=1995A&AS..114....1K (SIMBAD/NED BibCode)
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ADC_Keywords: Clusters, open; Photometry, CCD
Keywords: open clusters and associations: individual: NGC 6791 - HR diagram -
novae, cataclysmic variables
Description:
Three new photometric CCD-based datasets are presented for NGC 6791.
They consist of deep UBV photometry (to V_lim_=24, B_lim_=24,
U_lim_=23) of the central parts of the cluster and of selected fields
around it, and of relatively shallower UBVI photometry for the whole
cluster (23'x23'). The data have been used to discuss the reddening,
metallicity and age of NGC 6791.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 81 3948 UBV photometry of stars from NGC 6791 field
October 91, 2.1-m telescope data
table2.dat 100 15086 UBVI photometry of stars from NGC 6791 field
October 92, 0.9-m data
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See also:
J/A+AS/108/151 : Berkeley 22 & Berkeley 29 CCD photometry (Kaluzny, 1994)
J/A+AS/121/455 : BVI photometry of stars in Berkeley 18 (Kaluzny 1997)
J/A+AS/133/25 : CCD BVI photometry of Trumpler 5 (Kaluzny 1998)
Byte-by-byte Description of file: table1.dat, table2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- ID ID number
9- 15 F7.2 pix Xpos X coordinate (toward South);
1 pixel=0.68 arcsec
18- 24 F7.2 pix Ypos Y coordinate (toward West);
1 pixel=0.30 arcsec
26- 31 F6.3 mag Vmag V magnitude
33- 38 F6.3 mag e_Vmag rms uncertainty on V magnitude
40- 41 I2 --- o_Vmag Number of averaged V magnitude measurement
43 I1 --- q_Vmag Quality flag for V magnitude (1)
45- 50 F6.3 mag B-V []? B-V colour index
52- 57 F6.3 mag e_B-V []? rms uncertainty on B-V (2)
59- 60 I2 --- o_B-V Number of averaged B measurements
62 I1 --- q_B-V Quality flag for B-V (1)
64- 69 F6.3 mag U-B []? U-B colour index
71- 76 F6.3 mag e_U-B []? rms uncertainty on U-B (2)
78- 79 I2 --- o_U-B Number of averaged U measurements
81 I1 --- q_U-B Quality flag for U-B (1)
83- 88 F6.3 mag V-I []? V-I colour index
90- 95 F6.3 mag e_V-I []? rms uncertainty on V-I (2)
97- 98 I2 --- o_V-I []? Number of averaged I measurements
100 I1 --- q_V-I []? Quality flag for V-I
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Note (1): q=1 means relatively poor quality
Note (2): negative sigma means "unknown color"
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Courtesy: J. Kaluzny & S.M. Rucinski
<jka@sirius.astrouw.edu.pl> <rucinski@astro.utoronto.ca>
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(End) Simona Mei [CDS] 25-Jun-1995