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. =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: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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 Average B magnitude 34- 38 F5.2 mag Average V magnitude 40- 44 F5.2 mag ?=- Average R magnitude 46- 50 F5.2 mag ?=- 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) -------------------------------------------------------------------------------- Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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 Average B magnitude 31- 35 F5.2 mag Average V magnitude 37- 41 F5.2 mag ?=- Average R magnitude 43- 47 F5.2 mag 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) -------------------------------------------------------------------------------- Byte-by-byte Description of file: table4.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 A4 --- VName Variable name (VNNN) 6- 13 F8.4 d Per [13/746] Period 15- 19 F5.2 mag Average B magnitude 21- 25 F5.2 mag Average V magnitude 27- 31 F5.2 mag Average R magnitude 33- 37 F5.2 mag 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) -------------------------------------------------------------------------------- Byte-by-byte Description of file: table5.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 A4 --- VName Variable name (VNNN) 6- 10 F5.2 mag Average B magnitude 12- 16 F5.2 mag Average V magnitude 18- 22 F5.2 mag Average R magnitude 24- 28 F5.2 mag 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) -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- History: From electronic version of the journal References: Stetson et al., Paper I 1998PASP..110..533S, Cat. J/PASP/110/533 Stetson, Paper II 2000PASP..112..925S Stetson et al., Paper III 2003PASP..115..413S, Cat. J/PASP/115/413 Stetson, Paper IV 2005PASP..117..563S Stetson et al., Paper V 2005PASP..117.1325S, Cat, J/PASP/117/1325 ================================================================================ (End) Patricia Vannier [CDS] 12-Nov-2014