J/AJ/107/622 M68 variable star light curves (Brocato+, 1994)
CCD photometry of RR Lyrae stars in the globular cluster M 68.
Brocato E., Castellani V., Ripepi V.
<Astron. J., 107, 622-630 (1994)>
=1994AJ....107..622B 1994AJ....107..622B
ADC_Keywords: Clusters, globular ; Stars, variable ; Photometry, CCD
Keywords: globular clusters: M68 - stars: variables
Abstract:
20 CCD images of the globular cluster M68, taken during 14th - 17th
April 1989 with the 1.5m Danish telescope in La Silla, have been the
subject of a photometric investigation.
Description:
Time-series CCD photometry for 26 variable stars in M68.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 63 26 Variable list, and selected parameters (table 4)
lc/* . 26 Individual B and V light curves
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See also:
II/331 : M68 variable star light curves (Rosino+, 1953)
J/AJ/99/1831 : M 68 BVRI photometry (Alcaino+ 1990)
J/ApJ/412/183 : RR Lyr in M68 (Clement+, 1993)
J/AJ/108/555 : BVI photometry in globular cluster M68 (Walker, 1994)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- VName Variable name (VNN)
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 15 F5.2 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 27 F4.1 arcsec DEs Declination (J2000)
29- 30 A2 --- RRt [ab c] RR Lyr pulsation mode (ab or c)
32- 38 F7.4 [d] logP [-0.44/-0.13]? log(fundamental Period)
40- 43 F4.2 mag A(B) [0.4/1.4]? Blue amplitude
45- 48 F4.2 mag (B-V) [0.27/0.36]? Observed mean (B-V) color
50- 53 F4.2 mag (B-V)0 [0.24/0.33]? Dereddened mean color
55- 58 F4.2 [K] logTe [3.82/3.85]? log(effective temperature)
60- 63 F4.2 Sun A [1.68/1.91]? Evaluated Mass/Light ratio
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Byte-by-byte Description of file: lc/*
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Bytes Format Units Label Explanations
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1 A1 --- Band [BV] Filter
3- 14 F12.4 d HJD Heliocentric Julian Date
16- 20 F5.2 mag mag Photographic magnitude in Band
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Acknowledgements:
Daniel Bramich extracted the photometry from the Brocato et al. (1994)
paper for his own work and thought it would be worth sharing it so an
electronic version of it is available.
(End) Patricia Vannier [CDS] 03-Apr-2014