COMMISSION 27 OF THE I. A. U.
                   INFORMATION BULLETIN ON VARIABLE STARS
                                Number 2458

                                                       Konkoly Observatory
                                                       Budapest
                                                       6 January 1984

                                                       HU ISSN 0374-0676


                   A DATABASE FOR RS CVn BINARY STAR SYSTEMS


We are currently undertaking the task of compiling a Catalog of RS CVn
Binary Star Systems. The catalog is broken into four section. The contents of
each section is as follows:
Section 1
1.   Douglas S. Hall identification number.
2.   One of the more commonly used names for the system.
3.   Distance to the system in parsecs.
4.   1950 coordinates.
5.   Spectral and luminosity classes for the hot and cool stars.
6.   Average V maximum outside of eclipse (magnitude).
7.   Distortion wave V maximum amplitude (magnitude).
8.   A reported x-ray flux in units of 10^31 ergs/sec.
9.   A reported radio flux in units of Janskies.
10.  Whether or not H-alpha has been observed in emission.
11.  Ca II H and K emission, Star that shows the emission is indicated.
12.  Colors in which the system is known to have been observed.
13.  Type of eclipsing system (total, partial or none).

Section 2
1.   Julian date of conjunction with the presumed cooler star behind.
2.   Orbital period in days.
3.   Quadratic term in the ephemeris, in days. All values come from the
     Hall-Kreiner paper in ACTA ASTRONOMICA. (30), 387
4.   Orbital eccentricity.
5.   Indication of variability in the period.
6.   Masses (solar units) of the components.
7.   Radii (solar units) of the components.
8.   Configuration (Detached, Contact, Semi-detached).


 Section 3 is a cross-reference for the various names for each system
consisting of 1) Bayer (Greek Letter) identification, 2) Flamsteed number,


                               Table I
Section 1
I.D.
Name        R.A. (1950) Hot    Aver.Max. X-ray (E+31) H-alpha  Colors
Distance    Dec.(1950)  Cool   Wave Max. Radio (JY)   H and K  Eclipse
1
RT And      23 08 56     F8 V     9.01     Soft, <4.0              UBVR
95          +52 45 16    G9-K0V   0.04                   Yes       Total
2
Zeta And    00 44 41     K1 II    4.06     Soft,0.138              UBVR
31          +23 59 44     -       0.02                   Only      Partial
3
Lambda And  23 35 06    G8 IV-III 3.88     Soft,0.363    Yes       UBVR
24          +46 11 14     -       0.30     2.0E-2        Only      None
4
UX Ari      03 23 33     G5 V     6.5      Soft,2.1      Yes       UBVR (IUE)
50          +28 32 32    K0 IV    0.1      .200 Variable Cool      None
5
CQ Aur      06 00 39     G0       9.0      Soft,0.871              UBVR
220         +31 19 51    -                               Cool      Total

Section 2
I.D.                          Quadratic        Period
J.D.(hel)        Period(days) term       e     var.   Masses       Radii
1
2441141.88902  +0.628929513   -6.33E-11 0.09  -21.1  1.50/0.99  1.36/1.00 D*
2
2432751.617    +17.7692                 0.00         2.70/0.78  14.08/1.44 C?*
3
2429199.994    +20.5212                 0.04      F(M)=0.000611
4
2440133.766     +6.43791                             0.63/0.71
5
2429558.728    +10.621943    +3.78E-7          +5.8  1.6/2.0    1.9*g,7
*D=detached, C=contact

Section 3
I.D.  Bayer    Flamsteed   HR        HD       BD         Variable Visual
1.                                          BD +52 3383A   RT And
2. Zeta And    34 And   HR 215   HD 4502    BD +23 106     Zeta And
3. Lambda And  16 And   HR 8961  HD 222107  BD +45 4283    Lambda And
4.                               HD 21242   BD +28 532     UX Ari
5.                               HD 250810  BD +31 1179    CQ Aur




3) Yale Bright Star Catalog number, 4) Henry Draper Catalog number, 5) BD
number, 6) Variable star designation and 7) Visual binary designation. Section
4 will contain a bibliography on each source in the catalog (yet to be
compiled). A sample listing for each section is given in Table I.
  Copies of the catalog are available in tabular printout form or on 5-1/4"
floppy diskettes for APPLE micro-computer systems. The first three sections
of the catalog are in VISIFILE format, but they can be converted to DIF format
on request. The bibliography is currently available in SUPER FILE CABINET
format only. Observers are invited to send us preprints and reprints of 
published data so that we can continually update the catalog.





              E. NELSON and M. ZEILIK
             Capilla Peak Observatory
             The University of New Mexico
             Albuquerque, NM 87131
             U.S.A.