J/A+A/437/457 NGC 2548 uvbyHβ and proper motions (Balaguer-Nunez+, 2005)
uvby-Hβ CCD photometry and membership segregation of the open cluster
NGC 2548; Gaps in the Main Sequence of open clusters.
Balaguer-Nunez L., Jordi C., Galadi-Enriquez D.
<Astron. Astrophys. 437, 457 (2005)>
=2005A&A...437..457B 2005A&A...437..457B
ADC_Keywords: Clusters, open ; Photometry, uvby, beta ; Photometry, CCD ;
Proper motions
Keywords: Galaxy: open clusters and associations: individual: NGC 2548 -
techniques: photometry - astrometry - methods: observational -
methods: data analysis
Abstract:
Deep CCD photometry in the uvby-Hβ intermediate-band system is
presented for the cluster NGC 2548 (M 48). A complete membership
analysis based on astrometric and photometric criteria is applied.
Description:
table3.dat contains the catalogue of accurate uvby-Hβ and J2000
coordinates for 4806 stars in an area of 34'x34' around NGC 2548. We
mark the selection of probable members of NGC 2548, combining the
photometric study with an astrometric analysis.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 136 4806 Stromgren photometry of stars in NGC 2548 area
table4.dat 74 4806 Cross-identification of stars
table5.dat 94 501 Non-Parametric Astrometric Probability
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See also:
J/A+A/381/464 : Proper motions and membership in NGC 2548 (Wu+, 2002)
I/252 : The USNO-A2.0 Catalogue (Monet+ 1998)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
htpp://obswww.unige.ch/WEBDA : WEBDA DataBase
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq Sequential identification number
7- 8 I2 h RAh Right ascension (J2000)
10- 11 I2 min RAm Right ascension (J2000)
13- 18 F6.3 s RAs Right ascension (J2000)
20 A1 --- DE- Declination sign (J2000)
21 I1 deg DEd Declination (J2000)
23- 24 I2 arcmin DEm Declination (J2000)
26- 30 F5.2 arcsec DEs Declination (J2000)
31- 39 F9.3 arcmin xpos x-frame coordinate in arcmin
40- 48 F9.3 arcmin ypos y-frame coordinate in arcmin
49- 57 F9.3 mag b-y ?=99.990 b-y color index
58- 65 F8.4 mag e_b-y Error in b-y
66- 74 F9.3 mag Vmag ?=99.990 Johnson V magnitude
75- 82 F8.4 mag e_Vmag Error in Vmag
83- 91 F9.3 mag m1 ?=99.990 m1 color index
92- 99 F8.4 mag e_m1 Error in m1
100-108 F9.3 mag c1 ?=99.990 c1 color index
109-116 F8.4 mag e_c1 Error in c1
117-125 F9.3 mag Hb ?=99.990 Hβ color index
126-133 F8.4 mag e_Hb Error in Hbeta
134-136 A3 --- Mem Membership label
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq Sequential identification number
7- 8 I2 h RAh Right ascension (J2000)
10- 11 I2 min RAm Right ascension (J2000)
13- 18 F6.3 s RAs Right ascension (J2000)
20 A1 --- DE- Declination sign (J2000)
21 I1 deg DEd Declination (J2000)
23- 24 I2 arcmin DEm Declination (J2000)
26- 30 F5.2 arcsec DEs Declination (J2000)
32- 36 I5 --- WTB ?=0 Astrometry from Paper I, J/A+A/381/464,
Cl* NGC 2548 WTB NNN
38- 42 I5 --- Webda ?=0 Webda identification number
43- 48 I6 --- HIP ?=0 Hipparcos (I/239) identification number
50- 54 I5 --- TYC1 ?=0 TYC1 (I/259) identification number
55- 59 I5 --- TYC2 ?=0 TYC2 (I/259) identification number
60- 74 A15 --- USNO-A2.0 USNO-A2.0 (I/252) identification number
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- WTB Sequential identification number (from
Paper I, Wu et al., Cat. J/A+A/381/464)
6- 13 F8.3 arcmin xpos x-frame coordinate in arcmin
14- 21 F8.3 arcmin ypos y-frame coordinate in arcmin
24- 25 I2 h RAh Right ascension (J2000)
27- 28 I2 min RAm Right ascension (J2000)
30- 36 F7.4 s RAs Right ascension (J2000)
39 A1 --- DE- Declination sign (J2000)
40 I1 deg DEd Declination (J2000)
42- 43 I2 arcmin DEm Declination (J2000)
45- 50 F6.3 arcsec DEs Declination (J2000)
51- 59 F9.3 mas/yr pmRA Proper motion in alpha
60- 65 F6.3 mas/yr e_pmRA error in pmRA
66- 74 F9.3 mas/yr pmDE Proper motion in delta
75- 80 F6.3 mas/yr e_pmDE error in pmDE
81- 86 F6.2 --- PmembP Parametric membership probability (from
Paper I, Wu et al., Cat. J/A+A/381/464)
87- 92 F6.2 --- PmemnNP Non-parametric membership probability
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Acknowledgements: Lola Balaguer-Nunnez, lbalague(at)am.ub.es
History:
* 21-Apr-2005: Original version
* 12-Jul-2005: 2 couples of stars corrected in table4:
372+378, and 1274+1285
(End) L. Balaguer-Nunnez [Univ. Barcelona], Patricia Vannier [CDS] 21-Apr-2005