J/A+A/426/827 ubvyHβ photometry in NGC 1817 / 1807 (Balaguer-Nunez+ 2004)
uvby-Hβ CCD Photometry of NGC 1817 and NGC 1807.
Balaguer-Nunez L., Jordi C., Galadi-Enriquez D., Masana E.
<Astron. Astrophys. 426, 827 (2004)>
=2004A&A...426..827B 2004A&A...426..827B (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Photometry, CCD ; Photometry, uvby, beta
Keywords: Galaxy: open clusters and associations: individual: NGC 1817 -
Galaxy: open clusters and associations: individual: NGC 1807 -
techniques: photometry - methods: observational -
methods: data analysis
Description:
The catalogue of accurate uvby-Hβ and J2000 coordinates for 7842
stars in an area of 65'x40' around NGC 1817. We mark the selection of
probable members of NGC 1817, combining this photometric study with
the previous astrometric analysis (Balaguer-Nunez et al. 2004, Cat.
J/A+A/426/819). Also given is the cross-identification of stars
in common with the astrometry (Balaguer-Nunez et al. 2004, Cat.
J/A+A/426/819), WEBDA (http://obswww.unige.ch/WEBDA), Hipparcos
(ESA, 1997, Cat. I/239), Tycho-2 (Hog et al., 2000, Cat. I/250)
and USNO-A2 (Monet et al., 1998, Cat. I/252) catalogues.
Objects:
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RA (2000) DE Designation(s)
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05 12 06 +16 42.0 NGC 1817
05 10 42 +16 32.0 NGC 1807
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 136 7842 Stroemgren photometry of stars in NGC 1817 area
table5.dat 73 7842 Cross-identification of stars
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See also:
J/A+A/426/819 : NGC 1817 proper motions and membership (Balaguer-Nunez+, 2004)
J/A+AS/133/387 : NGC 1817 & NGC 1807 proper motions (Balaguer-Nunnez+ 1998)
J/A+A/399/105 : NGC 1817 red giants radial velocities (Mermilliod+, 2003)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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2- 5 I4 --- ID 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)
19 A1 --- DE- Declination sign (J2000)
20- 21 I2 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 ?=99.99 b-y color
58- 65 F8.4 mag e_b-y ?=99.99 Error in b-y
66- 74 F9.3 mag Vmag ?=99.99 Johnson V magnitude
75- 82 F8.4 mag e_Vmag ?=99.99 Error in Vmag
83- 91 F9.3 mag m1 ?=99.99 m1 = (u-b)-(b-y) color index
92- 99 F8.4 mag e_m1 ?=99.99 Error in m1
100-108 F9.3 mag c1 ?=99.99 c1 = (u-v)-(v-b) color index
109-116 F8.4 mag e_c1 ?=99.99 Error in c1
117-125 F9.3 mag Hb ?=99.99 Stroemgren Hβ index
126-133 F8.4 mag e_Hb ?=99.99 Error in Hbeta
134-136 A3 --- Mem Membership label (M: member, NM: non-member)
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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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2- 5 I4 --- ID 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)
19 A1 --- DE- Declination sign (J2000)
20- 21 I2 deg DEd Declination (J2000)
23- 24 I2 arcmin DEm Declination (J2000)
26- 30 F5.2 arcsec DEs Declination (J2000)
31- 35 I5 --- BN04 Balaguer-Nunez et al., 2004, Cat.
J/A+A/426/819 identification number
36- 40 I5 --- Webda WEBDA (http://obswww.unige.ch/WEBDA)
identification number
41- 48 I8 --- HIP Hipparcos (I/239) identification number
49- 53 I5 --- TYC1 TYC1 (I/250) identification number
54- 58 I5 --- TYC2 TYC2 (I/250) identification number
59- 73 A15 --- USNO-A2 USNO-A2 (I/252) identification number
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Acknowledgements: Lola Balaguer-Nunnez
(End) L. Balaguer-Nunnez [Universitat de Barcelona] 23-Jul-2004