J/MNRAS/309/739 NGC 2660 UBVIc photometry (Sandrelli+, 1999)
The intermediate age open cluster NGC 2660.
Sandrelli S., Bragaglia A., Tosi M., Marconi G.
<Mon. Not. R. Astron. Soc. 309, 739 (1999)>
=1999MNRAS.309..739S 1999MNRAS.309..739S
ADC_Keywords: Clusters, open ; Photometry, CCD ; Photometry, UBVRI
Keywords: Hertzsprung-Russell (HR) diagram -
open clusters and associations: general -
open clusters and associations: individual: NGC 2660
Abstract:
We present CCD UBVI photometry of the intermediate old
open cluster NGC 2660, covering from the red giant region
to about seven magnitudes below the main sequence turn-off. Using the
synthetic colour-magnitude diagram method, we estimate in a
self-consistent way values for distance modulus [(m-M)0∼12.2],
reddening [E(B-V)∼0.40], metallicity ([Fe/H] about solar) and age
(t≤1Gyr). A 30 per cent population of binary stars turns out to be
probably present.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table.dat 103 866 Photometry (UBVIc) and positions for 866 stars
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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 --- SBT Identification number
(<Cl* NGC 2660 SBT NNN> in Simbad)
6- 11 F6.3 mag Umag ?=0 U magnitude
13- 17 F5.3 mag e_Umag ?=0 rms uncertainty on Umag
19- 24 F6.3 mag Bmag [11.9/24.3]?=0 B magnitude
26- 30 F5.3 mag e_Bmag ?=0 rms uncertainty on Bmag
32- 37 F6.3 mag Vmag [10.6/22.6]?=0 V magnitude (from B-V)
39- 44 F6.3 mag Vmag2 [10.5/22.7]?=0 V magnitude (from V-I)
46- 50 F5.3 mag e_Vmag ?=0 rms uncertainty on Vmag
52- 57 F6.3 mag Imag [8.3/20.5]?=0 Cousins I magnitude
59- 63 F5.3 mag e_Imag ?=0 rms uncertainty on Imag
65- 71 F7.3 pix Xpos X position (1)
73- 79 F7.3 pix Ypos Y position (1)
81 I1 h RAh Right ascension (J2000)
83- 84 I2 min RAm Right ascension (J2000)
86- 90 F5.2 s RAs Right ascension (J2000)
92 A1 --- DE- Declination sign (J2000)
93- 94 I2 deg DEd Declination (J2000)
96- 97 I2 arcmin DEm Declination (J2000)
99-103 F5.2 arcsec DEs Declination (J2000)
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Note (1): 1 pix = 0.442". The field was centered on the cluster, at
coordinates (J2000) 08:42:36-47:13:25. North up and East left.
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Acknowledgements:
Angela Bragaglia, ANGELA(at)astbo3.bo.astro.it
(End) Patricia Bauer [CDS] 07-Dec-1999