J/A+A/565/A8 Stroemgren photometry near NGC 6528 (Calamida+, 2014)
Stroemgren and near-infrared photometry of metal-rich bulge globular clusters.
I. NGC 6528 and its surrounding field.
Calamida A., Bono G., Lagioia E.P., Milone A.P., Fabrizio M., Saviane I.,
Moni Bidin C., Mauro F., Buonanno R., Ferraro I., Iannicol G., Zoccali M.
<Astron. Astrophys. 565, A8 (2014)>
=2014A&A...565A...8C 2014A&A...565A...8C
ADC_Keywords: Clusters, globular ; Photometry, uvby
Keywords: stars: abundances - Hertzsprung-Russell and C-M diagrams -
Galaxy: bulge - stars: Population II - stars: evolution
Abstract:
We present Stroemgren and near-infrared (NIR) photometry of the bulge
cluster NGC 6528 and its surrounding field in Baade's Window. uvby
images were collected with EFOSC2 on the New Technology Telescope
(NTT, La Silla, ESO). The NIR catalogs are based on J,K-band VIRCAM at
VISTA (Paranal, ESO) and SOFI at NTT photometry. We matched the
aforementioned data sets with Hubble Space Telescope photometry to
obtain proper-motion-cleaned samples of NGC 6528 and bulge stars.
Furthermore, we were able to correct the Stroemgren-NIR photometry for
differential reddening. The huge color sensitivity of the
Stroemgren-NIR color-magnitude-diagrams (CMDs) helped us in
separating age and metallicity effects.
Description:
Log of the Stroemgren images collected with EFOSC2 on the New
Technology Telescope (La Silla, ESO) for the bulge cluster NGC6528 and
the halo cluster NGC6752 adopted in this investigation (program ID:
085.D-0374, PI: A. Calamida).
Objects:
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RA (2000) DE Designation(s)
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18 04 49.61 -30 03 20.8 NGC 6528 = ESO 456-48
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 89 34 *Log of the Stroemgren images
ngc6528.dat 86 25059 *Stroemgren photometry of NGC6528
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Note on table1.dat: collected with EFOSC2 on the New Technology Telescope
(La Silla, ESO) for the bulge cluster NGC6528 and the halo cluster NGC6752
adopted in this investigation (program ID: 085.D-0374, PI: A. Calamida)
Note on ngc6528.dat: Photometry is based on images collected with EFOSC2 on the
New Technology Telescope (La Silla, ESO, program ID: 085.D-0374,
PI: A. Calamida)
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See also:
J/AJ/84/1305 : UBV photometry in NGC 6528 (van den Bergh+, 1979)
J/A+AS/127/167 : V,I CCD photometry of NGC 6528 (Richtler+ 1998)
J/A+A/385/67 : NGC 6528 HST VI photometry and proper motions (Feltzing+ 2002)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Cluster name
10- 20 A11 "date" Date Observation date
22- 55 A34 --- FileName Name of the imge file
57- 60 I4 s ExpTime Exposure time
62 A1 --- Filt [uvby] Filter name
64- 65 I2 h RAh Right ascension (J2000)
67- 68 I2 min RAm Right ascension (J2000)
70- 73 F4.1 s RAs Right ascension (J2000)
75 A1 --- DE- Declination sign (J2000)
76- 77 I2 deg DEd Declination (J2000)
79- 80 I2 arcmin DEm Declination (J2000)
82- 85 F4.1 arcsec DEs Declination (J2000)
87- 89 F3.1 arcsec Seeing [0.8/1.7] Seeing
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Byte-by-byte Description of file: ngc6528.dat
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Bytes Format Units Label Explanations
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1- 7 I7 --- ID [4/6009774] Star ID number
9- 16 F8.3 pix Xpos X position on the reference image
18- 25 F8.3 pix Ypos Y position on the reference image
28- 34 F7.4 mag ymag ?=99.9999 Stroemgren y magnitude
36- 41 F6.4 mag e_ymag ?=9.9999 rms uncertainty on ymag
43- 49 F7.4 mag bmag ?=99.9999 Stroemgren b magnitude
51- 56 F6.4 mag e_bmag ?=9.9999 rms uncertainty on bmag
58- 64 F7.4 mag vmag ?=99.9999 Stroemgren v magnitude
66- 71 F6.4 mag e_vmag ?=9.9999 rms uncertainty on vmag
73- 79 F7.4 mag umag ?=99.9999 Stroemgren u magnitude
81- 86 F6.4 mag e_umag ?=9.9999 rms uncertainty on umag
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Acknowledgements:
Annalisa Calamida, calamida(at)stsci.edu,
Space Telescope Science Institute
(End) Annalisa Calamida [STSI], Patricia Vannier [CDS] 27-Feb-2014