J/MNRAS/358/66 uvbyβ photometry of NGC 663 (Fabregat+, 2005)
CCD uvbyβ photometry of the young open cluster NGC 663.
Fabregat J., Capilla G.
<Mon. Not. R. Astron. Soc., 358, 66-70 (2005)>
=2005MNRAS.358...66F 2005MNRAS.358...66F
ADC_Keywords: Clusters, open; Photometry, CCD; Photometry, H-beta;
Photometry, uvby; Stars, Be; Stars, B-type
Keywords: techniques: photometric - stars: emission-line, Be -
Hertzsprung-Russell (HR) diagram -
open clusters and associations: individual: NGC 663
Abstract:
We present CCD uvbyβ photometry for stars in the central area of
the young open cluster NGC 663. We find that the reddening is highly
variable, with values ranging from E(b-y)=0.639±0.032 in the
central part to E(b-y)=0.555±0.038 in the south-east. The distance
modulus is found to be 11.6±0.1mag. (2.1kpc), and the age
logt=7.25±0.1 years (25+7/-5Myr).
Description:
CCD photometry of NGC 663 was obtained on the nights of 1998 November
20-22 at the 1.52-m telescope of the Observatorio Astronomico
Nacional, located at the Calar Alto Observatory (Almeria, Spain).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 119 290 Coordinates and photometry for stars in NGC 663
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See also:
J/A+AS/119/271 : Be stars uvbyβ photometry (Fabregat+, 1996)
J/A+A/394/479 : uvbyβ photometry of h and chi Per (Capilla+, 2002)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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2- 5 I4 --- Star Star number, NGC 663 NNNN in Simbad
8- 9 I2 h RAh Right Ascension J2000 (hours)
11- 12 I2 min RAm Right Ascension J2000 (minutes)
14- 19 F6.3 s RAs Right Ascension J2000 (seconds)
21 A1 --- DE- Declination J2000 (sign)
22- 23 I2 deg DEd Declination J2000 (degrees)
25- 26 I2 arcmin DEm Declination J2000 (minutes)
28- 32 F5.2 arcsec DEs Declination J2000 (seconds)
37- 42 F6.3 mag Vmag Johnson V magnitude
44- 49 F6.3 mag b-y b-y color index
51- 56 F6.3 mag m1 m1 index
58- 63 F6.3 mag c1 c1 index
66- 71 F6.3 mag e_Vmag ?=99.999 rms uncertainty on Vmag (1)
73- 78 F6.3 mag e_b-y ?=99.999 rms uncertainty on b-y (1)
80- 85 F6.3 mag e_m1 ?=99.999 rms uncertainty on m1 (1)
87- 92 F6.3 mag e_c1 ?=99.999 rms uncertainty on c1 (1)
95 I1 --- o_Vmag number of uvby measurements
98-103 F6.3 mag Hbeta ?=99.999 beta index (1)
106-111 F6.3 mag e_Hbeta ?=99.999 rms uncertainty on Hbeta (1)
114 I1 --- o_Hbeta number of Hbeta measurements
117 I1 --- Member [0/1] Membership (0: nonmember, 1: member)
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Note (1): 99.999 in any field indicates that no data is available.
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Nomenclature Notes:
The cluster star numbering system is adopted from the WEBDA database
(http://obswww.unige.ch/webda). Numbers lower than 635 coincide with
Wallenquist (1929MeUpp..42.....W 1929MeUpp..42.....W) numbering, NGC 663 NNN in Simbad
Acknowledgements: Juan Fabregat, juan.fabregat(at)uv.es
(End) Patricia Vannier [CDS] 18-Mar-2005