J/A+A/358/547 M53 variable stars V light curves (Kopacki, 2000)
Variable stars in the globular cluster M53
Kopacki G.
<Astron. Astrophys. 358, 547 (2000)>
=2000A&A...358..547K 2000A&A...358..547K
ADC_Keywords: Clusters, globular ; Stars, variable ; Photometry, CCD
Keywords: stars: population II - stars: variables: RR Lyr -
globular clusters: individual: M53
Abstract:
We present the results of the application of the Image Subtraction
Method (ISM) to the CCD observations of the central region of globular
cluster M53. We have obtained good quality light curves of the 23
previously known RR Lyrae stars in this cluster. We have also
confirmed the variability of ten RR Lyrae candidates discovered by
Kravtsov. Moreover, we have found four new variables of this type in
the core of the cluster. Altogether, the light curves have been
obtained for 37 RR Lyrae stars. We also report the discovery of
variations in six cluster bright giants.
Objects:
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RA (2000) DE Designation(s)
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13 12 55.3 +18 10 09 M 53 = NGC 5024
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 44 44 Variable positions
dao.dat 41 2071 DAOPHOT V-filter photometry for 19 RR Lyrae
located well outside the cluster core
ism.dat 41 5029 ISM V-filter photometry of all observed variables
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See also:
V/97 : Updated 3rd Cat Variable Stars in Globular Clusters (Clement+ 1997)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- Var Variable designation (VNN, Cat. V/97) (G1)
6- 11 F6.1 arcsec Xpos Relative x position from cluster center (2)
13- 18 F6.1 arcsec Ypos Relative y position from cluster center (2)
22- 23 I2 h RAh ? Right ascension (J2000.0) (3)
25- 26 I2 min RAm ? Right ascension (J2000.0) (3)
28- 31 F4.1 s RAs ? Right ascension (J2000.0) (3)
33 A1 --- DE- Declination sign (J2000.0) (3)
34- 35 I2 deg DEd ? Declination (J2000.0) (3)
37- 38 I2 arcmin DEm ? Declination (J2000.0) (3)
40- 41 I2 arcsec DEs ? Declination (J2000.0) (3)
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Note (2): Field center, 13 10.5 +18 26 (1950)
Note (3): From Simbad database
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Byte-by-byte Description of file: dao.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- Var Variable designation (VNN, Cat. V/97) (G1)
6- 18 F13.5 d HJD Heliocentric Julian day
20- 26 F7.4 mag Vmag V magnitude
28- 33 F6.4 mag e_Vmag Error of V magnitude
35- 40 F6.4 --- X Airmass
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Byte-by-byte Description of file: ism.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- Var Variable designation (VNN, Cat. V/97) (G1)
6- 19 F14.6 d HJD Heliocentric Julian day
21- 31 F11.4 --- Flux Flux (in arbitrary flux units, ADU/s)
33- 40 F8.4 --- e_Flux Error of flux (in arbitrary flux units, ADU/s)
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Global notes:
Note (G1): Cl* NGC 5024 SAW VNN in Simbad
Acknowledgements: Grzegorz Kopacki
(End) Patricia Bauer [CDS] 14-Jun-2000