J/A+A/424/1101 Variable Stars in the field of ω Cen (Kaluzny+, 2004)
Cluster AgeS Experiment (CASE). Catalog of variable stars in the field
of globular cluster Omega Centauri.
Kaluzny J., Olech A., Thompson I.B., Pych W., Krzeminski W.,
Szchwarzenberg-Czerny A.
<Astron. Astrophys. 424, 1101 (2004)>
=2004A&A...424.1101K 2004A&A...424.1101K
ADC_Keywords: Clusters, globular ; Stars, variable ; Photometry, CCD
Keywords: stars: variables: general - binaries: eclipsing -
globular clusters: individual: NGC 5139 - RR Lyrae variables
Abstract:
We present results of a photometric survey for variable stars in the
field of the globular cluster Omega Centauri. The observed region was
centered roughly on the cluster core and covered 644arcmin2. The
cluster was monitored on 59 nights in 1999 and 2000. A total of 117
new variables were identified. Among them there are 16 RR Lyr-type
stars, 35 SX Phe variables and 26 eclipsing binaries.
A comprehensive catalog including all variable stars so far reported
from the cluster field is presented. We list basic photometric
properties and provide finding charts for a total of 392 objects. For
313 of them new BV light curves were obtained. The presented sample
includes several interesting variables, such as SX Phe stars with
extremely short periods of pulsation and several candidates for
pulsating K giants. Optical counterparts to 9 X-ray sources detected
by XMM and Chandra telescopes were identified: all of them are likely
to be foreground variables not related to the cluster.
Description:
BV-band photometric parameters for variable stars in globular cluster
Omega Centauri are presented.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 134 410 Photometric parameters for variables in
Omega Cen
blc/* . 304 B light curves
vlc/* . 301 V light curves
fig2/* . 6 Finding Charts (72 charts per figure)
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See also:
J/A+A/493/959 : UBV(RI)cHalpha photometry in omega Cen (Bellini+, 2009)
J/A+AS/120/139 : Variables in Omega Cen Fields 5139A-C (Kaluzny+ 1996)
J/A+AS/122/471 : Variables in Omega Cen Fields 5139D-F (Kaluzny+ 1997)
J/PASP/106/828 : BVRI photometry of Omega Cen (Walker 1994)
J/MNRAS/250/314 : CCD photometry of Omega Cen (Noble+ 1991)
J/AJ/114/1087 : Omega Cen radial velocities (Mayor+ 1997)
J/AJ/108/1350 : Omega Cen FUV photometry (Whitney+, 1994)
J/A+AS/125/343 : OGLE RR Lyr stars in omega Cen (Kaluzny+ 1997)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Star Star designation (1)
8- 9 I2 h RAh ? Right Ascension J2000 (hours)
11- 12 I2 min RAm ? Right Ascension J2000 (minutes)
14- 18 F5.2 s RAs ? Right Ascension J2000 (seconds)
21 A1 --- DE- Declination J2000 (sign)
22- 23 I2 deg DEd ? Declination J2000 (degrees)
25- 26 I2 arcmin DEm ? Declination J2000 (minutes)
28- 31 F4.1 arcsec DEs ? Declination J2000 (seconds)
33- 44 F12.8 d Per ? Period of variability
45 A1 --- u_Per [:?] Uncertainty flag on Per
47- 51 F5.2 mag Vmax ? V magnitude in maximum
52 A1 --- u_Vmax [:?] Uncertainty flag on Vmax
53 A1 --- n_Vmax [B] B: Bmax instead of Vmax
55- 59 F5.2 mag Vmin ? V magnitude in minimum
60 A1 --- u_Vmin [:?] Uncertainty flag on Vmin
61 A1 --- n_Vmin [B] B: Bmin instead of Vmin
63- 68 F6.3 mag ? Mean V magnitude
71- 76 F6.3 mag ? Mean B magnitude
77 A1 --- u_ [?] Uncertainty flag on
79- 82 A4 --- Type Type of variability
84- 95 A12 --- Other Designation of the star in other catalogs (2)
97 A1 --- Fig [a-f] Figure containing the finding chart
100-113 A14 --- Remarks Remarks
116-124 A9 --- VLC Name of the V light curve in "vlc" subdirectory
126-134 A9 --- BLC Name of the B light curve in "blc" subdirectory
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Note (1): VNNN or NVNNN
Note (2): Other names:
GC for OGLE-GC
NJL for Cl* NGC 5139 NJL
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Byte-by-byte Description of file: vlc/* blc/*
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Bytes Format Units Label Explanations
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1- 9 F9.4 d HJD-2450000 Heliocentric Julian Date (minus 2450000)
11- 17 F7.3 mag mag Magnitude (V in vlc, B in blc)
21- 25 F5.3 mag e_mag ?=9.999 rms uncertainty on mag (1)
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Note (1): When e_mag=9.999, mag is an erroneous value
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(End) A. Olech [CAMK, Warsaw], Patricia Vannier [CDS] 29-Jun-2004