J/AJ/136/1770 VI light curves of NGC 247 Cepheids (Garcia-Varela+, 2008)
The Araucaria project: the distance to the Sculptor group galaxy NGC 247 from
Cepheid variables discovered in a wide-field imaging survey.
Garcia-Varela A., Pietrzynski G., Gieren W., Udalski A., Soszynski I.,
Walker A., Bresolin F., Kudritzki R.-P., Szewczyk O., Szymanski M.,
Kubiak M., Wyrzykowski L.
<Astron. J., 136, 1770-1777 (2008)>
=2008AJ....136.1770G 2008AJ....136.1770G
ADC_Keywords: Galaxies, nearby ; Stars, variable; Photometry, CCD
Keywords: Cepheids - galaxies: distances and redshifts -
galaxies: individual (NGC 247) - galaxies: stellar content -
techniques: photometric
Abstract:
We report on the discovery of a Cepheid population in the Sculptor
Group spiral galaxy NGC 247 for the first time. On the basis of
wide-field images collected in photometric surveys in V and I bands
that were conducted with three different telescopes and cameras, 23
Cepheid variables were discovered with periods ranging from 17 to 131
days.
Description:
NGC 247 was observed with the 1.3m Warsaw telescope at LCO, the 2.2m
MPG/ESO telescope at La Silla Observatory, and the 4.0m Blanco
telescope at CTIO.
The observations of NGC 247 with the 1.3m Warsaw telescope were
conducted in the service mode. The collection of data began on 2003
August 5 and ended on 2004 December 18.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 69 23 Catalog of Cepheid variables in NGC 247
table6.dat 35 2397 Individual V and I Observations
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See also:
J/AJ/132/2556 : Cepheids in NGC 55 (Pietrzynski+, 2006)
J/A+A/485/41 : NGC 55 VLT spectroscopy of blue massive stars (Castro+, 2008)
J/ApJ/672/266 : NGC 55 Cepheids JK magnitudes (Gieren+, 2008)
J/AJ/123/789 : NGC 300 Cepheid variables (Pietrzynski+, 2002)
J/MNRAS/350/679 : BV photometry of NGC 300 variables (Mennickent+, 2004)
J/AJ/128/2815 : NGC 6822 Cepheid variables (Pietrzynski+, 2004)
J/A+A/450/873 : NGC 6822 bright variables VI phot. (Mennickent+, 2006)
J/ApJ/647/1056 : NGC 6822 Cepheid variables (Gieren+, 2006)
J/AJ/134/594 : Cepheids in WLM galaxy (Pietrzynski+, 2007)
J/AJ/135/1993 : JHK magnitudes of Sculptor RR Lyrae (Pietrzynski+, 2008)
J/ApJ/648/366 : NGC 3109 Cepheids VI phot. (Pietrzynski+, 2006)
J/ApJ/648/375 : NGC 3109 Cepheids JK phot. (Soszynski+, 2006)
J/ApJ/659/1198 : NGC 3109 blue supergiants (Evans+, 2007)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [cep]
4- 6 I03 --- cep Cepheid identification,
<[GPG2008] cepNNN> in Simbad
8- 9 I2 h RAh Right ascension (J2000)
11- 12 I2 min RAm Right ascension (J2000)
14- 18 F5.2 s RAs Right ascension (J2000)
20 A1 --- DE- Declination sign (J2000)
21- 22 I2 deg DEd Declination (J2000)
24- 25 I2 arcmin DEm Declination (J2000)
27- 30 F4.1 arcsec DEs Declination (J2000)
32- 38 F7.3 d Per Period
40- 48 F9.4 d T0 Julian date for phase zero (T0-2450000)
50- 55 F6.3 mag <Vmag> Mean V magnitude
57- 62 F6.3 mag <Imag> ? Mean I magnitude
64- 69 F6.3 mag <WImag> ? Mean Wesenheit index magnitude,
(WI=I-1.55(-)
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [cep]
4- 6 I03 --- cep Cepheid identification
8 A1 --- Filt [VI] Filter used
10- 22 F13.5 d HJD Heliocentric Julian Date of observation
24- 29 F6.3 mag mag Observed magnitude in Filt
31- 35 F5.3 mag e_mag The 1σ error in mag
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History:
From electronic version of the journal
References:
Gieren et al., 2009ApJ...700.1141G 2009ApJ...700.1141G
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 15-Apr-2011