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J/other/PZ/31.3     Two new cataclysmic variables in Lyra    (Denisenko+, 2011)
Two new cataclysmic variables in Lyra.
    Denisenko D.V.
   <Perem. Zvezdy, 31, 3 (2011)>
   =2011PZ.....31....3D
ADC_Keywords: Stars, variable ; Binaries, cataclysmic ; Photometry


Abstract:
    I report on the discovery of two cataclysmic variables in the same
    field in Lyra, originally identified on the base of their magnitudes
    in the USNO-B1.0 catalog and on Palomar images. The historical light
    curves were analyzed from 300+ photographic plates of the Moscow
    collection, covering 35 years of observations. One of the two stars,
    USNO-B1.0 1320-0390658, is showing rather frequent outbursts from B∼20
    to B=15.2 and is likely a dwarf nova of the UGSS subtype. The other
    variable, USNO-B1.0 1321-0397655, with only one observed outburst in
    1993, from B∼19 to I=11.8, is either an UGWZ dwarf nova or a recurrent
    nova. In both cases, its next outburst can occur in the nearest
    future.
Objects:
    ----------------------------------------------------------
       RA   (2000)   DE       Designation(s)
    ----------------------------------------------------------
    19 21 44.23  +42 04 41.8  DDE 20 = USNO-B1.0 1320-00390658
    19 21 48.93  +42 09 46.6  DDE 21 = USNO-B1.0 1321-00397655
    ----------------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        31       14   Magnitudes of new variables on Sky Survey plates
table2.dat        34       28   Outbursts of USNO-B1.0 1320-0390658 = DDE 20
dde.dat          184       28  *Catalogue of variable stars discovered by
                             Denis Denisenko (DDE) (26/08/2011 version)

Note on dde.dat: the catalog is available at
       http://hea.iki.rssi.ru/~denis/VarDDE.html


Byte-by-byte Description of file: table1.dat

   Bytes Format Units      Label     Explanations

   1- 10  A10 "YYYY/MM/DD" Date      Observation date
  12- 15  A4    ---        Band      Observed band
      18  A1    ---        l_mag20   Limit flag on mag20
  19- 23  F5.2  mag        mag20     Magnitude of DDE 20
  27- 31  F5.2  mag        mag21     Magnitude of DDE 21


Byte-by-byte Description of file: table2.dat

   Bytes Format Units      Label     Explanations

   1-  6  A6    ---        Plate     Plate number
   8- 17  A10 "YYYY.MM.DD" Obs.date  Observation date
  19- 25  A7    "h:m"      Obs.time  Observation time (hh:mm.m)
  27- 28  I2    min        TExp      Exposure time
  30- 33  F4.1  mag        mag       Observed magnitude
      34  A1    ---        u_mag     large certainty on mag


Byte-by-byte Description of file: dde.dat

   Bytes Format Units   Label     Explanations

   1-  3  A3    ---     ---       [DDE]
   5-  6  I2    ---     DDE       [1/28] DDE sequential number
   9- 10  I2    h       RAh       Right ascension (J2000.0)
  12- 13  I2    min     RAm       Right ascension (J2000.0)
  15- 19  F5.2  s       RAs       Right ascension (J2000.0)
      21  A1    ---     DE-       Declination sign (J2000.0)
  22- 23  I2    deg     DEd       Declination (J2000.0)
  25- 26  I2    arcmin  DEm       Declination (J2000.0)
  28- 31  F4.1  arcsec  DEs       Declination (J2000.0)
  34- 37  F4.1  mag     magM      Maximum magnitude
      38  A1    ---     u_magM    Uncertainty flag on magM
      40  A1    ---     l_magm    Limit flag on magm
  41- 44  F4.1  mag     magm      Minimum magnitude
      45  A1    ---     u_magm    Uncertainty flag on magm
      46  A1    ---     ---       [R]
  47- 51  F5.3  d       Per       ? Period
  55- 57  A3    ---     Type      Variability type
  61- 63  A3    ---     Cons      Constellation
  66- 78  A13   ----   USNO-A2.0  USNO-A2.0 designation
  81- 84  F4.1  mag     Rmag      ? R magnitude
  87- 90  F4.1  mag     Bmag      ? B magnitude
  92-184  A93   ---     Note      Note


History:
    From electronic version of the journal
(End)                                      Patricia Vannier [CDS]    11-May-2012