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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
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) 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:
FileName Lrecl Records Explanations
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
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
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 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) (1) 41- 44 A4 --- Notes This work's notes (1)
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.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: table3.dat
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)
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.
Global notes: Note (G1): Variables with ID number smaller than V172 belong to the Saha, Monet, & Seitzer (1986AJ.....92..302S) catalog, while larger numbers refer to new identified variables. <[SMS86] NNN> in Simbad.
History: From electronic version of the journal References: Monelli et al. Paper II. 2003AJ....126..218M Fabrizio et al. Paper IV. 2011PASP..123..384F Fabrizio et al. Paper V. 2012PASP..124..519F Cat. J/PASP/124/519 Coppola et al. Paper VI. 2013ApJ...775....6C Monelli et al. Paper VII. 2014ApJ...796...90M Fabrizio et al. Paper VIII. 2015A&A...580A..18F Cat. J/A+A/580/A18 Coppola et al. Paper IX. 2015ApJ...814...71C Cat. J/ApJ/814/71 Fabrizio et al. Paper X. 2016ApJ...830..126F Cat. J/ApJ/830/126
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 09-Feb-2012
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