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J/A+A/375/909       RR Lyrae stars in the Sgr dwarf         (Cseresnjes 2001)
RR Lyrae stars in the Sagittarius dwarf galaxy: Period analysis
     Cseresnjes P.
    <Astron. Astrophys. 375, 909 (2001)>
    =2001A&A...375..909C
ADC_Keywords: Stars, variable ; Magnitudes

Keywords: stars: horizontal-branch - stars: population II -
          stars: variables: RR Lyr - galaxies: dwarf -
          galaxies: individual: Sagittarius dwarf - Local group

Description:
    We carried out a period analysis on ∼3700 RR Lyrae stars on two
    Schmidt fields centred on (l, b)=(3.1°, -77.1°) and (6.6°,
    -10.8°) respectively, covering an area of ∼50°2. These stars
    are distributed almost evenly between the Sagittarius dwarf galaxy
    (Sgr) and the Milky Way.

    Files in the "lcurves" directory are the light curves of the
    multi-periodic RR Lyraes discovered towards the Sgr dwarf galaxy. This
    set includes stars in Sgr and also foreground Galactic RR Lyraes.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        81       40   Double mode RR Lyrae in Sgr
table2.dat        81       13   Galactic RRd stars
table3.dat        76        5   RR Lyrae stars in Sgr with two closely spaced
                              frequencies
table4.dat        76        8   Galactic RR Lyraes with two closely spaced
                              frequencies
lcurves/*         24       66   Light curves (table 5)


See also:
   J/A+A/357/871 : RR Lyrae stars in the Sgr dwarf (Paper I) (Cseresnjes+, 2000)


Byte-by-byte Description of file: table[12].dat

   Bytes Format Units   Label    Explanations

   1-  8  A8    ---     Name     RR Lyrae designation
  10- 11  I2    h       RAh      Right ascension (J2000)
  13- 14  I2    min     RAm      Right ascension (J2000)
  16- 20  F5.2  s       RAs      Right ascension (J2000)
      22  A1    ---     DE-      Declination sign (J2000)
  23- 24  I2    deg     DEd      Declination (J2000)
  26- 27  I2    arcmin  DEm      Declination (J2000)
  29- 32  F4.1  arcsec  DEs      Declination (J2000)
  34- 37  F4.1  mag     Bjmag    ? Johnson B magnitude (DUO field)
  39- 42  F4.1  mag     B4415    ? B4415 magnitude (SAG field) (1)
  44- 47  F4.2  ---     A0       Amplitude of the fundamental mode pulsation (2)
  49- 52  F4.2  ---     A1/A0    Amplitude ratio
  54- 60  F7.5  d       P0       Period of the fundamental mode pulsation
  62- 67  F6.4  ---     P1/P0    Period ratio
  69- 72  F4.2  ---     Prob     Probability that the Ξratio occured by
                                  chance if it were following a Fisher-Snedecor
                                  distribution
  74- 81  A8    ---     Meth     Method 1 (yes/no) (3)

Note (1): B4415 magnitude: 68 Kodak Tech-Pan 4415 films combined with
     a BG12 filter
Note (2): Amplitudes are given in Bjmag for DUO and B4415 for SAG.

Note (3): the abbreviations are:
      A0: fundamental period aliased
      A1: first overtone period aliased
       N: periodogram too noisy - i.e. Sj<8 (see Chap. 3)


Byte-by-byte Description of file: table[34].dat

   Bytes Format Units   Label    Explanations

   1-  8  A8    ---     Name     RR Lyrae designation
  10- 11  I2    h       RAh      Right ascension (J2000)
  13- 14  I2    min     RAm      Right ascension (J2000)
  16- 20  F5.2  s       RAs      Right ascension (J2000)
      22  A1    ---     DE-      Declination sign (J2000)
  23- 24  I2    deg     DEd      Declination (J2000)
  26- 27  I2    arcmin  DEm      Declination (J2000)
  29- 32  F4.1  arcsec  DEs      Declination (J2000)
  34- 37  F4.1  mag     Bjmag    ? Johnson B magnitude
  39- 42  F4.1  mag     B4415    ? B4415 magnitude (1)
  44- 47  F4.2  ---     Ap       Primary pulsation amplitude
  49- 52  F4.2  ---     As/Ap    Amplitude ratio
  54- 60  F7.5  d       Pp       Primary pulsation period
  62- 67  F6.4  ---     Ps/Pp    Period ratio
  69- 72  F4.2  ---     Prob     Probability that the Ξratio occured by
                                  chance if it were following a Fisher-Snedecor
                                  distribution
  74- 76  A3    ---     Type     RR Lyrae type

Note (1): B4415 magnitude: 68 Kodak Tech-Pan 4415 films combined with a
     BG12 filter


Byte-by-byte Description of file: lcurves/*

   Bytes Format Units   Label     Explanations

   1- 13  F13.5 d       JD        Julian date
  15- 19  F5.2  mag     mag       Johnson B or B4415 magnitude (1)
  21- 24  F4.2  mag     e_mag     error on magnitude

Note (1): Magnitudes are given in Bj for light curves with prefix "vd",
      and in B4415 for light curves with prefix "vs".


Acknowledgements: Patrick CSERESNJES 


References:
    Cseresnjes et al., Paper I    2000A&A...357..871C, Cat. J/A+A/357/871
(End)                                        Patricia Bauer [CDS]    20-Aug-2001