J/A+A/398/541 VI light-curves of the variable stars in M13 (Kopacki+, 2003)
Variable stars in the globular cluster M13.
Kopacki G., Kolaczkowski Z., Pigulski A.,
<Astron. Astrophys. 398, 541 (2003)>
=2003A&A...398..541K 2003A&A...398..541K
ADC_Keywords: Clusters, globular ; Stars, variable ; Photometry, CCD
Keywords: stars: population II - stars: variables: RR Lyr -
stars: variables: Cepheids - globular clusters: individual: M 13
Description:
VI light-curves of variable stars in the globular cluster M13 are
presented. They are based on the CCD observations carried out at the
Bialkow station of the Wroclaw University Observatory using 60-cm
reflecting telescope and the CCD camera. A 6x4 arcmin-squared field of
view covering the core of the cluster was observed through V and I_C
filters of the Johnson-Kron-Cousins UBV(RI)_C system. About 300 frames
in both filters were taken during 23 nights between 2001 February 27
and August 1. The CCD images were analyzed with the DAOPHOT
profile-fitting software and Image Subtraction Method. The main result
of this study is discovery of five RR Lyrae and one SX Poenicis stars.
Moreover we detect non-radial pulsations in RRc star v36. We also
comment the variability of all observed suspected variable stars in
M13.
Objects:
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RA (2000) DE Designation(s)
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16 41 41.4 +36 27 37 M 13 = NGC 6205
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
coord.dat 45 45 Equatorial coordinates of all observed variable
and suspected variable stars
daovper.dat 42 3401 DAOPHOT V-filter photometry for periodic
pulsating stars (BL Her and RR Lyr)
daovred.dat 42 3643 DAOPHOT V-filter instrumental photometry for
observed red variables located well outside the
cluster core
ismi.dat 48 4123 ISM I-filter photometry of BL Her, RR Lyr,
and SX Phe variable stars
ismv.dat 48 8889 ISM V-filter photometry of all observed variables
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Byte-by-byte Description of file: coord.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- Saw Variable designation, vNN, (G1)
7- 10 A4 --- Lud Ludendorff's number, NGC 6205 NNNa in Simbad
14- 19 A6 --- VType Type of variability
22- 23 I2 h RAh Right ascension (J2000)
25- 26 I2 min RAm Right ascension (J2000)
28- 32 F5.2 s RAs Right ascension (J2000)
34 A1 --- DE- Declination sign (J2000)
35- 36 I2 deg DEd Declination (J2000)
38- 39 I2 arcmin DEm Declination (J2000)
41- 44 F4.1 arcsec DEs Declination (J2000)
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Byte-by-byte Description of file: daovper.dat daovred.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- Saw Variable designation (G1)
5- 17 F13.5 d HJD Heliocentric Julian Day
19- 25 F7.4 mag Vmag V instrumental magnitude
27- 32 F6.4 mag e_Vmag Error of V magnitude
34- 41 F8.4 --- X ?=-33.0000 Airmass (1)
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Note (1): -33.0000 means not available.
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Byte-by-byte Description of file: ismi.dat ismv.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- Saw Variable designation (G1)
6- 19 F14.6 d HJD Heliocentric Julian Day
23- 33 F11.4 --- Flux Differential Flux (in arbitrary units, ADU/s) (1)
39- 47 F9.4 --- e_Flux Error of flux (in arbitrary flux units, ADU/s)
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Note (1): flux in the sense f0 - fstar, where f0 is the flux in
the reference frame. Smaller (i.e. large negative) values of the
flux correspond to a larger total flux.
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Global notes:
Note (G1): vNN = Cl* NGC 6205 SAW VNN in Simbad
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Acknowledgements: Grzegorz Kopacki
(End) Patricia Bauer [CDS] 23-Jan-2003