COMMISSION 27 OF THE I. A. U.
          INFORMATION BULLETIN ON VARIABLE STARS
                     Number 2837

                                      Konkoly Observatory
                                      Budapest
                                      19 December 1985

                                      HU ISSN 0374 - 0676

            IMPROVED POSITIONS OF DWARF NOVAE


    One of the first problems that any investigator of variable
  stars has to deal with is the inaccuracy of the coordinates of
  the object under consideration.
    A brief search through the literature shows that the
  astrometric papers related to variable stars are rather scarce.
  In order to provide accurate positions for variable stars, the
  plate collection of the observatory has been searched and
  some results are here in presented.
    Table I gives accurate coordinates for 32 dwarf novae for
  which the finder charts have been taken from Vogt and Bateson
  (1982). The reference stars were taken from the SAOC given an
  average mean error of +- 0.74" in RA and +- 0.50" in DEC. For
  those objects south of -60deg Yale Transactions Vol 31 and 32
  Part II were used as a source for the calibration stars; in
  this case the average mean error is +- 0.77" in RA and +- 0.48"
  in DEC.
    The first column of Table I gives the object; the second
  and third the RA and DEC for 1950.0; the fourth and fifth
  columns list the differences in RA and DEC with the positions
  quoted in the Special Supplement to the Third Edition of the
  GCVS in the sense GCVS minus this note.
    I would like to thank M.R. Cesco and J. Vicentela for
  measuring some of the plates involved in this note.


                     CARLOS E. LOPEZ
                     Observatorio "Felix Aguilar"
                     Benavidez 8175 (O)
                     5407 Marquesado - San Juan
                     Argentina.

  Reference:
 Vogt, N. and Bateson, F.M. (1982). Astron. Astrophys. Suppl.
  Ser. 48, 383 [BIBCODE 1982A&AS...48..383V ]






                      TABLE I


OBJECT        RA (1950.0)       DEC         DeltaRA    DeltaDEC
              h  m  s         deg  '  "        s          "
UY Phe        01 20 58.73     -42 34 12.8    + 0.27     +11.2
WX Hyi        02 08 29.42     -63 32 47.8    - 1.42     -18.2
VW Hyi        04 09 32.98     -71 25 27.2    - 2.98     + 3.2
AQ Eri        05 03 43.95     -04 12 03.6    - 0.05     + 3.6
BI Ori        05 21 16.94     +00 57 48.5    + 0.06     + 0.5
CW Mon        06 34 20.72     +00 04 52.9    + 0.28     + 7.1
WZ CMa        07 16 47.71     -27 02 09.1    + 0.29     + 3.7
BV Pup        07 46 57.45     -23 26 25.2    + 0.55     + 1.2
Z Cha         08 08 49.63     -76 23 09.0    -11.63     -21.0
BB Vel        08 35 11.61     -47 12 06.2    + 0.39     -11.8
CU Vel        08 56 44.57     -41 36 09.8    - 7.57     -14.2
V436 Cen      11 11 36.87     -37 24 26.3    - 1.81     + 2.3
T Leo         11 35 52.77     +03 38 45.4    + 0.23     + 8.6
MU Cen        12 10 16.80     -44 11 34.3    + 1.20     +34.3
V373 Cen      12 23 23.91     -45 32 58.8    - 2.90     - 1.2
EX Hya        12 49 42.38     -28 58 38.2    + 0.38     -33.8
BV Cen        13 28 09.54     -54 43 05.9    + 0.46     + 5.9
EK TrA        15 09 40.88     -64 54 31.0    - 0.88     -35.0
HP Nor        16 16 55.51     -54 46 13.9    - 3.51     +61.9
IK Nor        16 21 27.10     -55 13 12.1    + 0.90     - 5.9
V422 Ara      16 54 45.78     -61 38 59.2    + 0.22     +11.2
CSV 7612 *    17 12 01.35     -65 29 42.6    - 5.35     +12.6
BF Ara        17 34 35.87     -41 08 58.6    -10.87     - 1.4
UZ Ser        18 08 33.31     -14 56 17.6    - 0.31     - 0.4
DP Pav        18 21 24.14     -64 59 22.8    - 0.14     - 1.2
V800 Aql      18 54 10.98     +10 44 42.9    - 0.98     -18.9
UU Aql        19 54 35.23     -09 27 26.4    + 0.17     + 8.4
V794 Aql      20 14 56.51     -03 49 11.7    - 1.51     + 5.7
TU Ind        20 29 43.09     -45 36 15.9    - 1.09     -20.1
VY Aqr        21 09 28.38     -09 01 57.7    + 0.62     - 8.3
VZ Aqr        21 27 48.59     -03 12 29.7    - 0.59     - 0.3
AN Gru        23 05 04.51     -47 41 53.8    - 0.51     +41.8

*Numbered 8383 in the New Catalogue of Suspected Variables