J/PASP/126/616 Variable stars in Leo I dSph (Stetson+, 2014)
Homogeneous photometry. VI: Variable stars in the Leo I dwarf spheroidal galaxy.
Stetson P.B., Fiorentino G., Bono G., Bernard E.J., Monelli M.,
Iannicola G., Gallart C., Ferraro I.
<Publ. Astron. Soc. Pac., 126, 616-641 (2014)>
=2014PASP..126..616S 2014PASP..126..616S
ADC_Keywords: Galaxies, nearby ; Stars, variable ; Photometry, UBVRI
Keywords: Stars
Abstract:
From archival ground-based images of the Leo I dwarf spheroidal
galaxy, we have identified and characterized the pulsation properties
of 164 candidate RR Lyrae variables and 55 candidate anomalous and/or
short-period Cepheids. We have also identified 19 candidate
long-period variable stars and 13 other candidate variables whose
physical nature is unclear, but due to the limitations of our
observational material we are unable to estimate reliable periods for
them.
Description:
The observational material for this study consists of 1884 individual
CCD images obtained on 48 nights during 32 observing runs. These data
are contained within a much larger data collection (∼400000 images,
∼500 observing runs) compiled and maintained by the first author.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 147 32 Leo I observations
table2.dat 95 164 RR Lyrae candidates: periods, photometric
parameters and positions
table3.dat 101 55 Anomalous and short-period Cepheids (AC/spC)
candidates: periods and photometric parameters
table4.dat 81 19 Long-Period Variable (LPV) candidates
table5.dat 52 13 Suspected variables of unknown type
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See also:
J/PASP/115/413 : BVI photometry in the open cluster NGC 6791 (Stetson+, 2003)
J/PASP/110/533 : BR photometry of Fornax bright stars (Stetson+ 1998)
J/PASP/117/1325 : BVRI photometry in NGC 4147 (Stetson+, 2005)
J/ApJ/657/241 : Spectroscopy of Leo I red giants (Koch+, 2007)
J/ApJ/663/960 : Radial velocities of Leo I stars (Sohn+, 2007)
J/MNRAS/378/318 : Chemical abundances in Leo I and II dSph (Bosler+, 2007)
J/ApJ/675/201 : Radial velocities of stars near Leo I (Mateo+, 2008)
J/MNRAS/354/708 : Leo I VI photometry (Bellazzini+, 2004)
J/MNRAS/404/1475 : JHK photometry of Leo I AGB and red giants (Held+, 2010)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Run [1/32] Run number
4- 11 A8 --- ID Run identification
14- 23 A10 "date" Date Observation date (first)
24- 29 A6 --- Edate Observation date (last)
31- 47 A17 --- Tel Telescope
49- 69 A21 --- Cam Camera/Detector
71- 72 I2 --- U [1/43]?=- Number of measurements in U band
74- 75 I2 --- B [1/30]?=- Number of measurements in B band
77- 78 I2 --- V [1/72]?=- Number of measurements in V band
80- 81 I2 --- R [3/16]?=- Number of measurements in R band
83- 84 I2 --- I [1/13]?=- Number of measurements in I band
86- 87 A2 --- Mul Multiple observations
90-147 A58 --- Com Comments about the observation
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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 --- VName Variable name (VNNN)
5 A1 --- n_VName [a] Suspected Blazhko effect (G1)
6 A1 --- --- [=]
7- 10 A4 --- OName Other name
12- 15 A4 --- Vtype Variable type: RRab or RRc (first overtone)
17- 25 F9.7 d Per [0.26/0.96] Pulsation period
28- 32 F5.2 mag <Bmag> Average B magnitude
34- 38 F5.2 mag <Vmag> Average V magnitude
40- 44 F5.2 mag <Rmag> ?=- Average R magnitude
46- 50 F5.2 mag <Imag> ?=- Average I magnitude
52- 55 F4.2 mag Bamp ?=- Amplitude variation in B band
57- 60 F4.2 mag Vamp Amplitude variation in V band
62- 65 F4.2 mag Ramp ?=- Amplitude variation in R band
67- 70 F4.2 mag Iamp ?=- Amplitude variation in I band
71 A1 --- Qual [ABC] Quality flag, A=good (G2)
73- 74 I2 h RAh Right ascension (J2000)
76- 77 I2 min RAm Right ascension (J2000)
79- 83 F5.2 s RAs Right ascension (J2000)
85 A1 --- DE- Declination sign (J2000)
86- 87 I2 deg DEd Declination (J2000)
89- 90 I2 arcmin DEm Declination (J2000)
92- 95 F4.1 arcsec DEs Declination (J2000)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- VName Variable name (VNNN)
6 A1 --- --- [=]
8- 11 A4 --- OName Other name
12 A1 --- n_VName [a] Note (G1)
14- 22 F9.7 d Per [0.51/3.2] Period
25- 29 F5.2 mag <Bmag> Average B magnitude
31- 35 F5.2 mag <Vmag> Average V magnitude
37- 41 F5.2 mag <Rmag> ?=- Average R magnitude
43- 47 F5.2 mag <Imag> Average I magnitude
49- 52 F4.2 mag Bamp Amplitude variation in B band
54- 57 F4.2 mag Vamp Amplitude variation in V band
59- 62 F4.2 mag Ramp ?=- Amplitude variation in R band
64- 67 F4.2 mag Iamp ?=- Amplitude variation in I band
69 A1 --- Qual [A/C] Quality flag, A=good (G2)
71- 73 A3 --- Mode Pulsation mode: FU=fundamental,
FO=first overtone, or Unc=uncertain mode
75- 77 F3.1 Msun Mass [0.6/4.8]? Mass
79- 80 I2 h RAh Right ascension (J2000)
82- 83 I2 min RAm Right ascension (J2000)
85- 89 F5.2 s RAs Right ascension (J2000)
91 A1 --- DE- Declination sign (J2000)
92- 93 I2 deg DEd Declination (J2000)
95- 96 I2 arcmin DEm Declination (J2000)
98-101 F4.1 arcsec DEs Declination (J2000)
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- VName Variable name (VNNN)
6- 13 F8.4 d Per [13/746] Period
15- 19 F5.2 mag <Bmag> Average B magnitude
21- 25 F5.2 mag <Vmag> Average V magnitude
27- 31 F5.2 mag <Rmag> Average R magnitude
33- 37 F5.2 mag <Imag> Average I magnitude
39- 42 F4.2 mag Bamp Amplitude variation in B band
44- 47 F4.2 mag Vamp Amplitude variation in V band
49- 52 F4.2 mag Ramp Amplitude variation in R band
54- 57 F4.2 mag Iamp Amplitude variation in I band
59- 60 I2 h RAh Right ascension (J2000)
62- 63 I2 min RAm Right ascension (J2000)
65- 69 F5.2 s RAs Right ascension (J2000)
71 A1 --- DE- Declination sign (J2000)
72- 73 I2 deg DEd Declination (J2000)
75- 76 I2 arcmin DEm Declination (J2000)
78- 81 F4.1 arcsec DEs Declination (J2000)
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- VName Variable name (VNNN)
6- 10 F5.2 mag <Bmag> Average B magnitude
12- 16 F5.2 mag <Vmag> Average V magnitude
18- 22 F5.2 mag <Rmag> Average R magnitude
24- 28 F5.2 mag <Imag> Average I magnitude
30- 31 I2 h RAh Right ascension (J2000)
33- 34 I2 min RAm Right ascension (J2000)
36- 40 F5.2 s RAs Right ascension (J2000)
42 A1 --- DE- Declination sign (J2000)
43- 44 I2 deg DEd Declination (J2000)
46- 47 I2 arcmin DEm Declination (J2000)
49- 52 F4.1 arcsec DEs Declination (J2000)
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Global notes:
Note (G1): a = suspected Blazhko or double-mode pulsator
Note (G2): Quality flags are:
A = good
B = uncertain or fair
C = very uncertain or poor
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History:
From electronic version of the journal
References:
Stetson et al., Paper I 1998PASP..110..533S 1998PASP..110..533S, Cat. J/PASP/110/533
Stetson, Paper II 2000PASP..112..925S 2000PASP..112..925S
Stetson et al., Paper III 2003PASP..115..413S 2003PASP..115..413S, Cat. J/PASP/115/413
Stetson, Paper IV 2005PASP..117..563S 2005PASP..117..563S
Stetson et al., Paper V 2005PASP..117.1325S 2005PASP..117.1325S, Cat, J/PASP/117/1325
(End) Patricia Vannier [CDS] 12-Nov-2014