J/AJ/126/197 The Carina projects. I. Bright variables stars (Dall'Ora+, 2003)
The Carina project.
I. Bright variable stars.
Dall'Ora M., Ripepi V., Caputo F., Castellani V., Bono G., Smith H.A.,
Brocato E., Buonanno R., Castellani M., Corsi C.E., Marconi M., Monelli M.,
Nonino M., Pulone L., Walker A.R.
<Astron. J., 126, 197-217 (2003)>
=2003AJ....126..197D 2003AJ....126..197D
ADC_Keywords: Galaxies, nearby ; Photometry, UBV ; Stars, variable
Keywords: galaxies: dwarf - galaxies: individual (Carina) - Local Group -
stars: distances - stars: horizontal-branch - stars: oscillations
Abstract:
We present new BV time series data of the Carina dwarf spheroidal
galaxy (dSph). Current data cover an area of ∼0.3deg2 around the
center of the galaxy and allow us to identify 92 variables. Among them
75 are RR Lyrae stars, 15 are bona fide anomalous Cepheids, one might
be a Galactic field RR Lyrae star, and one is located along the Carina
red giant branch. Expanding upon the seminal photographic
investigation by Saha, Monet, & Seitzer (1986AJ.....92..302S 1986AJ.....92..302S) we
supply, for the first time, accurate estimates of their pulsation
parameters (periods, amplitudes, mean magnitudes, and colors) on the
basis of CCD photometry. Approximately 50% of both RR Lyrae stars and
anomalous Cepheids are new identifications. Among the RR Lyrae sample,
six objects are new candidate double-mode (RRd) variables. On the
basis of their pulsation properties we estimate that two variables
(V158, V182) are about 50% more massive than typical RR Lyrae stars,
while the bulk of the anomalous Cepheids are roughly a factor of 2
more massive than fundamental-mode (RRab) RR Lyrae stars.
Description:
Observations were collected by two of us (E. B. and V. C.) over three
consecutive nights (2000 January 5-7) at the 2.2m ESO/MPI telescope
(La Silla, Chile) equipped with the Wide Field Imager (WFI), which is
a mosaic camera with eight EEV 2048x4096 chips. The pixel scale is
0.238"/pixel, and the total field of view is ∼34'x33'. We observed
with the BV filters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 44 175 Catalog of the variable stars
table2.dat 54 4304 Photometry of the Carina dSph variable stars
table3.dat 87 92 Pulsation properties of variable stars
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See also:
B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2012)
J/AJ/131/895 : Stars in the Carina dwarf spheroidal galaxy (Koch+, 2006)
J/ApJ/649/201 : Velocities and Washington photometry in Carina dSph (Munoz+,
2006)
J/AJ/130/2677 : Stars in the Carina dSph galaxy field (Majewski+, 2005)
J/AJ/115/1856 : Dwarf Cepheids in Carina (Mateo+, 1998)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [CCD #]
6- 7 I2 --- CCD [50/57] Chip number of the CCD camera
9- 12 A4 --- [SMS86] Object identification (VNNN) (G1)
14- 15 I2 h RAh Hour of right Ascension (J2000)
17- 18 I2 min RAm Minute of Right Ascension (J2000)
20- 24 F5.2 s RAs Second of Right Ascension (J2000)
26 A1 --- DE- Sign of the declination (J2000)
27- 28 I2 deg DEd Degree of Declination (J2000)
30- 31 I2 arcmin DEm Arcminute of Declination (J2000)
33- 36 F4.1 arcsec DEs Arcsecond of Declination (J2000)
38- 39 A2 --- N86 Notes from Saha, Monet & Seitzer
(1986AJ.....92..302S 1986AJ.....92..302S) (1)
41- 44 A4 --- Notes This work's notes (1)
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Note (1): Note as follows:
sv = Suspected variable;
nv = No variability detected;
LC = Light curve;
d = Possible double-mode RR Lyrae star;
e = Possible field galaxy;
f = Poorly sampled light curve;
g = Blend of two stars;
h = Mismatch in the mean magnitude.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- [SMS86] Object identification (VNNN) (G1)
6- 17 F12.4 d HJD.B ? Heliocentric Julian Date for Bmag
19- 24 F6.3 mag Bmag ? The B-band magnitude
26- 29 F4.3 mag e_Bmag ? Error in Bmag
31- 42 F12.4 d HJD.V ? Heliocentric Julian Date for Vmag
44- 49 F6.3 mag Vmag ? The V-band magnitude
51- 54 F4.3 mag e_Vmag ? Error in Vmag
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- --- [CCD #]
6- 7 I2 --- CCD [50/57] Chip number of the CCD camera
9- 12 A4 --- [SMS86] Object identification (VNNN) (G1)
14- 15 A2 --- Type Variable classification: AC=Anomalous Cepheid,
ab=RRab, c=RRc, d=RRd
17- 22 F6.4 d Epoch Helicentric Julian Date epoch minus 2451540.0
24- 28 F5.3 d Per Period
30 A1 --- u_Per [u] Indicates an uncertainty in Per (2)
32- 37 F6.3 [d] LogP Logarithm of the Period
39- 44 F6.3 mag VmagM Magnitude-averaged V-band magnitude
46- 51 F6.3 mag VmagI Intensity-averaged V-band magnitude
53- 58 F6.3 mag BmagM Magnitude-averaged B-band magnitude
60- 65 F6.3 mag BmagI Intensity-averaged B-band magnitude
67- 71 F5.3 mag B-V The intensity-averaged (B-V) color index
73- 77 F5.3 mag Vamp The V-band amplitude
79- 83 F5.3 mag Bamp The B-band amplitude
85- 87 A3 --- n_[SMS86] Additional notes on [SMS86] (3)
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Note (2): Due to less accurate pulsation parameters.
Note (3): Note(s) as follows:
d = Located close to a bright star, the edge of the chip or possible blend;
e = Possible double-mode variable;
f = Variable located along the RGB;
g = Poorly sampled light curve;
h = Alternative period Per = 0.489 days, as reported by Saha et al. 1986;
i = Field variable.
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Global notes:
Note (G1): Variables with ID number smaller than V172 belong to the Saha,
Monet, & Seitzer (1986AJ.....92..302S 1986AJ.....92..302S) catalog, while larger numbers
refer to new identified variables. <[SMS86] NNN> in Simbad.
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History:
From electronic version of the journal
References:
Monelli et al. Paper II. 2003AJ....126..218M 2003AJ....126..218M
Fabrizio et al. Paper IV. 2011PASP..123..384F 2011PASP..123..384F
Fabrizio et al. Paper V. 2012PASP..124..519F 2012PASP..124..519F Cat. J/PASP/124/519
Coppola et al. Paper VI. 2013ApJ...775....6C 2013ApJ...775....6C
Monelli et al. Paper VII. 2014ApJ...796...90M 2014ApJ...796...90M
Fabrizio et al. Paper VIII. 2015A&A...580A..18F 2015A&A...580A..18F Cat. J/A+A/580/A18
Coppola et al. Paper IX. 2015ApJ...814...71C 2015ApJ...814...71C Cat. J/ApJ/814/71
Fabrizio et al. Paper X. 2016ApJ...830..126F 2016ApJ...830..126F Cat. J/ApJ/830/126
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 09-Feb-2012