Access to Astronomical Catalogues

← Click to display the menu
J/ApJ/694/1237      BVRI light curves of NGC 247 Cepheids   (Madore+, 2009)

The Cepheid distance to NGC 0247. Madore B.F., Freedman W.L., Catanzarite J., Navarrete M. <Astrophys. J., 694, 1237-1249 (2009)> =2009ApJ...694.1237M
ADC_Keywords: Stars, variable ; Photometry, UBVRI Keywords: Cepheids - galaxies: distances and redshifts - galaxies: individual (NGC 0247) Abstract: We report VRI CCD observations of nine Cepheids in the South Polar (Sculptor) Group spiral galaxy NGC 0247. Periods of these Cepheids range from 20 to 70 days. Over the past 20 years, the brightest Cepheid in our sample, NGC 0247:[MF09] C1, has decreased its period by 6%, faded by 0.8mag in the V band, and become bluer by 0.23mag in (V-I). Description: Observations for this program were carried out over a span of eight years (giving a time baseline of almost 3000 days). Observation began first at the Cerro Tololo 4m, and was completed using the 2.5m du Pont telescope at Las Campanas, Chile. Three fields of NGC 0247 were surveyed in B, V, R, and I filters at the Cerro Tololo 4m telescope during 1984 November to 1988 November. From the second through the fourth year of the program, data were obtained in the service-observing mode offered at Cerro Tololo Inter-American Observatory (CTIO) Beginning in 1990, the observing program for the Sculptor galaxies shifted to the du Pont 2.5m telescope at the Las Campanas Observatory. BVRI CCD observations covering the same three selected fields were obtained in 1990 December, 1991 September, and 1992 October, November, and December. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 46 9 Positions for [MF09] Cepheids lc.dat 28 559 BVRI light curves
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 15 A15 --- --- (NGC 0247:[MF09]) 17- 18 A2 --- [MFC2009] Cepheid name, CN 20- 25 F6.3 d Per Period 27- 28 I2 h RAh Right ascension (J2000) 30- 31 I2 min RAm Right ascension (J2000) 33- 36 F4.1 s RAs Right ascension (J2000) 38 A1 --- DE- Declination sign (J2000) 39- 40 I2 deg DEd Declination (J2000) 42- 43 I2 arcmin DEm Declination (J2000) 45- 46 I2 arcsec DEs Declination (J2000)
Byte-by-byte Description of file: lc.dat
Bytes Format Units Label Explanations
1- 2 A2 --- [MFC2009] Cepheid name (CN) 4- 15 F12.4 d JD Julian date 17 A1 --- Band [BVRI] Band 19- 23 F5.2 mag mag Magnitude in band 25- 28 F4.2 mag e_mag rms uncertainty on mag
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 12-Mar-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service