=======================================================================
        A Low-Resolution Spectroscopic Exploration of Puzzling
                          OGLE Variable Stars

         P. Pietrukowicz, M. Latour, R. Angeloni, F. di Mille,
                 I. Soszynski, A. Udalski, C. Germana

=======================================================================
pietruk@astrouw.edu.pl


This directory contains details on magnetic stars (alpha2 CVn type,
ACV) identified in the OGLE-III Galactic bulge (BLG) fields and
recently confirmed spectroscopically.

The directory structure is as follows:

README            - this file

ident.dat         - identification of stars

acv.dat           - parameters of the objects

phot/I/           - I-band photometry of individual objects
phot/V/           - V-band photometry of individual objects
phot.tar.gz       - gzipped phot/ directory

fcharts/          - finding charts for individual objects
                       
spectra/          - low-resolution spectra of some objects

pap.pdf           - PDF version of the paper Pietrukowicz et al. (2015),
                    Acta Astron., 65, 63, (arXiv:1503.03499) describing
                    this result


Format of the file ident.dat:
--------------------------------------------------------------------------
 Bytes  Format Units   Description
--------------------------------------------------------------------------
  1- 16  A16   ---     Star's ID in the form OGLE-BLG-ACV-NNN
 19- 26  A8    ---     OGLE-III field
 28- 33  I6    ---     OGLE-III database number
 36- 37  I2    h       Right ascension, equinox J2000.0 (hours)
 39- 40  I2    m       Right ascension, equinox J2000.0 (minutes)
 42- 46  F5.2  s       Right ascension, equinox J2000.0 (seconds)
     48  A1    ---     Declination, equinox J2000.0 (sign)
 49- 50  I2    deg     Declination, equinox J2000.0 (degrees)
 52- 53  I2    arcmin  Declination, equinox J2000.0 (arc minutes)
 55- 58  F4.1  arcsec  Declination, equinox J2000.0 (arc seconds)
--------------------------------------------------------------------------

Format of the file acv.dat:
--------------------------------------------------------------------------
 Bytes  Format Units   Description
--------------------------------------------------------------------------
  1- 16  A16   ---     Object's ID in the form OGLE-BLG-ACV-NNN
 19- 23  F5.2  mag     Mean V-band magnitude
 25- 29  F5.2  mag     Mean I-band magnitude
 32- 36  F5.2  mag     I-band amplitude
 39- 47  F9.6  days    Period
 50- 57  F8.6  days    Uncertainty of the period
 60- 62  A2    ---     Spectral type
--------------------------------------------------------------------------

Finding charts are gzipped Postscript images. The names of the files are
in the form: OGLE-BLG-ACV-NNN.ps.gz. The finding charts are 60"x60"
subframes of the I-band reference frames centered on the star. White cross
marks the star. North is up and East to the left.


Any presentation of the scientific analysis or usage of the data from the
OGLE catalog of variable stars should include appropriate references
to OGLE papers.