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J/AJ/123/840    VI photometry of variable stars in Fornax       (Bersier+, 2002)

Variable stars in the Fornax dwarf galaxy. Bersier D., Wood P.R. <Astron. J. 123, 840 (2002)> =2002AJ....123..840B
ADC_Keywords: Stars, variable ; Photometry Keywords: distance scale - galaxies: individual (Fornax) - RR Lyrae variable - stars: variables: general Abstract: We present a search for variable stars in the Fornax dwarf galaxy covering an area of half a square degree. We have ∼30 epochs of VI data. We found and determined periods for more than 500 RR Lyrae, 17 anomalous Cepheids, and six Population II Cepheids. In addition we have 85 candidate long-period variables, the majority of which were previously unknown. We estimate that the average metal abundance of RR Lyrae stars is [Fe/H]~=-1.6dex. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 25 132 Journal of observations table2.dat 77 515 RR Lyrae variables table3.dat 75 24 Anomalous Cepheids and Population II Cepheids table4.dat 106 85 Candidate and known Long Period Variables
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1 A1 --- Field Field number (1) 3- 11 F9.5 d RJDV Reduced Julian date of V band observation (3) 13- 21 F9.5 d RJDIc Reduced Julian date of Ic band observation (3) 23- 25 A3 --- Obs Observatory code (2)
Note (1): Field center as follows: 1 = RA 2:40:26.0 DE -34:28:40 (J2000) 2 = RA 2:38:40.0 DE -34:28:40 (J2000) 3 = RA 2:40:26.0 DE -34:50:00 (J2000) 4 = RA 2:38:40.0 DE -34:50:00 (J2000) Note (2): Observatory code as follows: MSO = Mount Stromlo Observatory SSO = Siding Spring Observatory Note (3): the paper does not specify in which year the observations were made -- one can probably assume that the dates are JD-2450000
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [FBW] 5- 20 A16 --- FBW RR Lyrae name (FBW JHHMMSS.s+DDMMSS) 23- 24 I2 --- o_Vmag Number of observations used in Vmag 26- 31 F6.3 mag Vmag The phase-weighted V band magnitude 33- 37 F5.3 mag e_Vmag The uncertainty in Vmag 39- 40 I2 --- o_Icmag Number of observations used in Icmag 42- 47 F6.3 mag Icmag The phase-weighted Ic band magnitude 49- 53 F5.3 mag e_Icmag The uncertainty in Icmag 56- 61 F6.3 --- WS The Welch-Stetson (1993AJ....105.1813W) variability index 64- 70 F7.5 d Period Pulsation period 73- 77 F5.3 mag E(B-V) The E(B-V) color excess
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [FBW] 5- 20 A16 --- FBW Cepheid name (FBW JHHMMSS.s+DDMMSS) 24- 29 F6.3 mag Vmag The phase-weighted V band magnitude 32- 36 F5.3 mag V-Ic The phase-weighted (V-Ic) color index 40- 44 F5.3 mag e_Vmag The uncertainty in Vmag 48- 52 F5.3 mag e_V-Ic The uncertainty in V-Ic 56- 60 F5.3 mag E(B-V) The E(B-V) color excess 63- 70 F8.5 d Per Pulsation period 72- 75 A4 --- Class Cepheid classification
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [FBW] 5- 20 A16 --- FBW Long Period Variable nam (FBW JHHMMSS.s+DDMMSS) 24- 25 I2 --- o_Vmag Number of observations used in Vmag 28- 33 F6.3 mag Vmag The arithmetic average V band magnitude 37- 41 F5.3 mag e_Vmag The average measurement error in Vmag 45- 46 I2 --- o_V-Ic Number of observations used in V-Ic 50- 54 F5.3 mag V-Ic The arithmetic averaged V-Ic color index 57- 61 F5.3 mag e_V-Ic The average measurement error in V-Ic 64- 68 F5.3 mag E(B-V) The E(B-V) color excess 72- 86 A15 --- OName Other identification (1) 88-106 A19 --- n_FBW Notes on FBW name (2)
Note (1): Other identification: S# = From Table 1 of Stetson et al., 1998, Cat. J/PASP/110/553, [SHS98] NNN in Simbad DK# = from Demers & Kunkel (1979PASP...91..761D), DK NN DI# = from Demers & Irwin (1987MNRAS.226..943D), [DI87] VNN Note (2): the question mark (?) means that the variability is not certain.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 25-Apr-2002
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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