J/A+A/445/901 BV(RI)c bands of Cepheids in IC 1613 (Antonello+, 2006)
Variable stars in nearby galaxies.
VII. P-L relation in the BVRI bands of Cepheids in IC 1613.
Antonello E., Fossati L., Fugazza D., Mantegazza L., Gieren W.
<Astron. Astrophys. 445, 901 (2006)>
=2006A&A...445..901A 2006A&A...445..901A
ADC_Keywords: Galaxies, photometry ; Stars, variable ; Photometry, UBVRI ;
Photometry, Cousins
Keywords: stars: variables: Cepheids - galaxies: individual: IC 1613 -
galaxies: Local Group - galaxies: stellar content
Abstract:
A set of six BV(RI)c observations collected with the WFI at the ESO
2.2m telescope have been used to derive multicolor data of Cepheids in
IC 1613 identified in previous surveys. Since part of the previously
known data were obtained only in V,I filters or without filter (Wh)
bands, the method of Freedman has been applied to get reliable mean
intensity values of Cepheid magnitudes in the various bands. The
resulting slopes of the relations in the BVI bands are similar, within
the uncertainties, to those previously obtained by other authors for
the LMC. The distribution of the Cepheids in the period-color diagrams
is compatible with a change near P about 10d as observed in LMC. The
distribution in the color-color diagrams is more similar to that in
SMC, and this should be related to the very low metallicity of the
galaxy.
Description:
The CCD observations were performed in service mode with the WFI at
the 2.2m ESO telescope. The data file is the Table 2 of the paper.
Each record includes the WFI identification of the Cepheid and the
magnitude in one of the bands (B, V, Rc or Ic). Owing to the
uncertainties, the I-band data of only few Cepheids were used in the
paper.
Objects:
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RA (2000) DE Designation(s)
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01 04 54.2 +02 08 00 IC 1613 = UGC 668
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 72 52 Parameters of Cepheids in IC 1613
ic1613.dat 36 921 Photometry of the Cepheids in IC 1613 (table 2)
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See also:
J/A+A/363/29 : Variable stars in IC 1613 (Antonello+, 2000)
J/A+A/367/759 : Variable stars in IC 1613 (Mantegazza+, 2001)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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2- 7 A6 --- [AFF2006] WFI Designation
11- 15 I5 --- [UWP2001] ? OGLE designation (Udalski et al.,
2001AcA....51..221U 2001AcA....51..221U
19- 23 A5 --- [AFM2000] Merate group designation (Mantegazza et al.,
2001, J/A+A/367/759, and references
therein) (1)
29- 36 F8.5 d Per period
41- 45 F5.2 mag Bmag ? Mean intensity Johnson B magnitude
50- 54 F5.2 mag Vmag Mean intensity Johnson V magnitude
59- 63 F5.2 mag Rcmag Mean intensity Cousins R magnitude
68- 72 F5.2 mag Icmag ? Mean intensity Cousins I magnitude (2)
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Note (1): Merate group designation (Mantegazza et al., 2001A&A...367..759M 2001A&A...367..759M,
and references therein)
ANNNN = [AMF99] VNNNN
BNNNN = [AFM2000] VNNNN-B
CNNNN = [AFM2000] VNNNN-C
DNNNN = [AFM2000] VNNNN-D
Note (2): Most of the mean I magnitudes are taken from Udalski et al.,
2001AcA....51..221U 2001AcA....51..221U
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Byte-by-byte Description of file: ic1613.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- [AFF2006] WFI Designation
8- 9 A2 --- Band [BV RcIc] Filter (BV Johnson, RI Cousins)
11- 21 F11.3 d HJD Heliocentric Julian date
24- 29 F6.3 mag mag Magnitude in Filter
32- 36 F5.3 mag e_mag Photometric error on magnitude
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Acknowledgements: Elio Antonello, elio(at)merate.mi.astro.it
References:
Antonello et al., Paper I 1999A&A...349...55A 1999A&A...349...55A
Antonello et al., Paper II 1999A&A...350..797A 1999A&A...350..797A
Antonello et al., Paper III 2000A&A...363...29A 2000A&A...363...29A, Cat. J/A+A/363/29
Mantegazza et al., Paper IV 2001A&A...367..759M 2001A&A...367..759M, Cat. J/A+A/367/759
Antonello et al., Paper V 2002A&A...386..860A 2002A&A...386..860A
Antonello et al., Paper VI 2002A&A...388..477A 2002A&A...388..477A
(End) Elio Antonello [INAF], Patricia Vannier [CDS] 24-Nov-2005